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XMTE-2001 2002 2301 2302 temperature controller (temperature regulator)




Product Name: XMTE-2001 2002 2301 2302 Temperature Controller (Temperature Regulator)
Number of products: 94449-392
Product model: XMTE-2001 2002 2301 2302
Updated: 2009.07.02
Produced by: Thermocouple Thermocouple, thermal resistance, bimetal thermometer, polytetrafluoroethylene, PTFE gasket--Shanghai Feilong Instrument & Electrical Co., Ltd.


Product details


Input specifications (compatible with one meter):
Thermocouple: K, S, E, J, T, B, N, WRe
Thermal resistance: CU50, PT100
Linear voltage: 0-5V, 1-5V, 0-1V, 0-100mV, 0-20mV, etc. (requires external shunt resistor): 0-10mA, 0-20mA, 4-20mA, etc. Expansion specifications: keep the above Allows the user to specify an additional input specification based on the input specifications (probability of indexing table may be required)
● Measurement range:
K (-50- + 1300 ° C), S (-50- + 1700 ° C), T (-200- + 350 ° C)
E (0-800 ° C), J (0-1000 ° C), B (0-1800 ° C), N (0-1300 ° C), WRe (0-2300 ° C)
CU50 (-50- + 150 ℃), PT100 (-200- + 600 ℃)
Linear input: -1999— + 9999 is defined by the user. ● Measurement accuracy: 0.2 level (+ 0.2% FS) (when thermal resistance, linear voltage, linear current, and thermocouple input, and copper resistance compensation or freezing point compensation is used for cold junction).
● Response time: ≤0.5 seconds (when setting the digital filter parameter dl = 0)
Note: The meter can measure B indexing thermocouples in the range of 0-600 ℃, but the measurement accuracy cannot reach the 0.2 level, and the 600-1800 ℃ range can ensure the 0.2 level measurement accuracy.
● Adjustment method: Position adjustment method (adjustable return difference)
Artificial intelligence adjustment, including advanced control algorithm of fuzzy logic PID adjustment and parameter self-tuning function, control accuracy can reach ± 0.2 ℃.
● Output specifications: Modular or non-modular direct custom output function parameters:
Relay contact switch output (normally open + normally closed): 250VAC / 1A or 30VDC / 1A
Thyristor non-contact switch output (normally open + normally closed): 100-240VAC / 0.2A (continuous), 2A (20mS instantaneous, repetition period greater than 5S)
SSR voltage output: 12VDC / 30mA (for driving SSR solid state relay)
Triac trigger output: Bidirectional TRIAC that can trigger 5-500A; 2 unidirectional TRIAC reverse parallel or TRIAC power module linear current output: 0-10 mA or 4-20 mA can be defined ● Alarm Function: 4 ways of upper limit, lower limit, positive deviation, negative deviation, etc., can output up to 3 channels, with power-off alarm selection function ● Electromagnetic compatibility: IEC61000-4-4 (electric fast transient pulse group), + 2KV / 5KHZ; IEC61000-4-5 (surge) 4KV
● Isolation and withstand voltage: ≥2300V between the power supply terminal, the trigger of the relay and the signal terminal; 600V between the weak electrical signal terminals that are isolated from each other
● Manual function: automatic / manual two-way disturbance-free switching
Power supply: 100-240VAC, -15%, + 10% / 50-60HZ; or 24VDC / AC, -15%, + 10%
● Power consumption: ≤5W
● Ambient temperature: 0-50 ℃
Panel size: 96 × 96mm, 160 × 80mm, 80 × 160mm, 48 × 96mm, 96 × 48mm, 72 × 72mm, 48 × 48mm
Opening size: 92 × 92mm, 152 × 76mm, 76 × 152mm, 45 × 92mm, 92 × 45mm, 68 × 68mm, 44 × 44mm
Fourth, instrument wiring

80 × 160, 160 × 80 panel wiring diagram Note: The linear voltage range below 1V is input from terminals 1, 2 and the signals of 0 to 5V and 1 to 5V are input from terminals 1, 4. 4 ~ 20mA linear current input can be changed to 1 ~ 5V or 0.2 ~ 1V voltage signal with 250Ω or 50Ω resistor respectively, and then input from terminals 1, 2 or 1, and 4.
Use the wiring method to select the thermocouple cold junction automatic compensation mode. When using a thermocouple as a signal, according to the thermocouple temperature measurement principle, the thermocouple needs to be temperature compensated. This meter can measure the temperature near the terminal at the rear of the meter to perform the thermocouple cold junction. Automatic compensation, but due to the error of the measuring element, the instrument itself heating and other heat sources near the instrument, etc., often the deviation of the automatic compensation method is large, in the worst case it may reach 2-4 ° C. Therefore, when the measurement temperature accuracy is high, an external junction box can be installed. Put the CU50 copper resistor (sold separately) and the cold end of the thermocouple together and keep them away from various hot objects. This will cause inconsistent measurement caused by compensation. The property is generally less than 0.5 ℃. Due to the error of the CU50 copper resistor itself, there may be a slight error in room temperature, which can be corrected by SC parameters. By changing the external copper resistance to a precision fixed resistance, the thermostat compensation function can also be realized. For example, an external 60 ohm fixed resistor can be used to check the CU50 indexing table to obtain a compensation temperature of 46.6 ° C. At this time, the cold end of the thermocouple can be accurately compensated by placing it in a constant temperature bath with a controlled temperature of 46.6 ° C. resistance. If the external resistance is changed to a short-circuit wire, freezing point compensation can be achieved. At this time, the cold end of the thermocouple (the junction of the thermocouple or the compensation wire and the ordinary wire) is required to be placed in an ice-water mixture (0 ° C), and its compensation accuracy can be As high as above 0.1 ° C. The wiring diagrams of the three compensation modes are as follows:



Five, panel description

1. PV ------- Measurement value display window (red)
2. SV ------- set value display window (green)
3. AM -------- Manual indicator (green)
4, ALM1 ------ AL1 lights up when the corresponding light (red)
5. ALM2 ------ Light up the corresponding light (red) when AL2 is in operation
6. OUT ------- adjust the output indicator (green)
7.SET -------- function key
8. ◄ ----------- Data shift (also manual / automatic switching)
9. ▼ ------- Data Decrease Key
10. ▲ ------- Data increase key After the meter is powered on, the upper display window displays the measured value (PV), and the lower display window displays the given value (SV). In the basic state, the SV window can use alternating characters to indicate some states of the system, as follows:
1. When the input measurement signal is out of range (it may be caused by wrong setting of the sensor specifications, input disconnection or short circuit), it will flash: "orAL". At this time, the meter will automatically stop the control and fix the output to the value defined by the parameter outL.
2. When an alarm occurs, it can display "ALM1", "ALM2", "Hy-1" or "Hy-2" respectively, which indicate that the upper limit alarm, lower limit alarm, positive deviation alarm and negative deviation alarm have occurred. The alarm flashing function can be turned off (see AL-P parameter setting). When the alarm is used as a control, the alarm character flashing function can be turned off to avoid excessive flashing.
The four LED indicators on the instrument panel have the following meanings:
OUT output indicator: The output indicator reflects the size of the output current through light / dark changes during linear current output, and flashes the time ratio when outputting in time proportional mode (relay, solid state relay, and thyristor zero-crossing trigger output). Reflects the output size.
ALM1 indicator: When the AL1 event is activated, the corresponding lamp is lit.
ALM2 indicator: When the AL2 event is activated, the corresponding lamp is lit.
AM lamp: manual indicator.
Functions and settings (1) Internal menu



(Two) basic operation
1. Display switching: Press the SET key to switch between different display states. Modify data: If the parameter lock is not locked, the numerical data displayed in the display window under the meter can be modified by pressing the ◄ (A / M), ▼ or ▲ keys. For example: when the setpoint needs to be set, the meter can be switched to the normal display state, and the setpoint can be modified by pressing the ◄ (A / M), ▼ or ▲ keys. The meter has both a fast data increase and decrease method and a decimal point shift method. Press the ▼ key to decrease the data, and press the ▲ key to increase the data. The decimal point of the numeric digit can be modified and flashed at the same time (like a cursor). Press and hold the button and hold it down, you can quickly increase / decrease the value, and the speed will automatically increase with the decimal point to the right (level 3 speed). And press the ◄ (A / M) key to directly move the modified data position (cursor), and the operation is fast.
2. Manual / Automatic Switching: Press the ◄ (A / M) key to enable the meter to switch between disturbances automatically and manually. In the manual mode, the first word of the lower display shows “M”. When the meter is in the manual state, press the ▲ or ▼ key directly to increase or decrease the manual output value. Press the SET key during auto to directly check the auto output value (the first word on the lower display shows "A"). By setting the 'A-M' parameter (see below for details), the meter can also be switched to the manual state by not allowing the keys on the panel to prevent accidental entry into the manual state.
3. Setting parameters: Press the SET key and hold for about 2 seconds to enter the parameter setting state. In the parameter setting state, press the SET key, the meter will display various parameters in sequence, such as the upper limit alarm value ALM1, parameter lock LOCK, etc. For the meter configured and locked with the parameter lock, only the parameters needed by the operator (on-site) parameter). Use ▼, ▲, ◄ (A / M) and other keys to modify the parameter value. Press ◄ (A / M) and hold it down to return to the previous parameter display. Press the ◄ (A / M) key first and then press the SET key to exit the setting parameter state. If there is no key operation, it will automatically exit the setting parameter state after about 30 seconds. If the parameters are locked (introduced later), only the on-site parameters defined by the EP parameters (user-definable, frequently used parameters and procedures at the job site) can be displayed, and other parameters cannot be seen. However, at least you can see the LOCK parameter displayed.
(3) Self-tuning (AT) operation instrument can start the auto-tuning function to help determine P, I, d and other control parameters when it is used for the first time. When the auto-tuning is started for the first time, the meter can be switched to the normal display state. Press the ◄ (A / M) key and hold it for about 2 minutes. At this time, the lower display will alternately display the word "At". At the time of self-tuning, the instrument performs position adjustment, and automatically calculates control parameters such as P, I, and d after about 2-3 oscillations. If you want to give up the auto-tuning in advance during the auto-tuning process, you can press the ◄ (A / M) key again and hold it for about 2 minutes to make the “At” disappear. Depending on the system, the time required for auto-tuning can vary from seconds to hours. After the instrument has successfully completed the auto-tuning, the parameter At will be set to 3 (1 at the time of delivery) or 4 so that it will not be possible to start auto-tuning by pressing the ◄ (A / M) key from the panel in the future. VDF. If the instrument has already started the auto-tuning function once, if you want to start the auto-tuning timing in the future, you can start it by setting the parameter At to 2 (refer to the “parameter function” description below).
The parameter values obtained by the system at different given values are not exactly the same. Before performing the auto-tuning function, the given value should be set to the most commonly used value or the intermediate value. If the system is an electric furnace with good thermal insulation performance, give The setting value should be set on the maximum value used by the system, and then perform the operation function of starting auto-tuning. The settings of the parameters t (control period) and Hy (hysteresis) also affect the self-tuning process. Generally speaking, the smaller the setting values of these two parameters, the higher the theoretical accuracy of the auto-tuning parameters. However, if the Hy value is too small, the meter may cause a misadjustment of the position adjustment near the given value due to input fluctuations. In this way, completely wrong parameters may be set. It is recommended that t = 0-2 and Hy = 0.3.
Manual self-tuning: As the self-tuning is performed using position adjustment, its output will be positioned at the position defined by the parameters outL and outH. In some situations where the output does not allow a large change, such as where some actuators use regulating valves, conventional self-tuning is not appropriate. This instrument has a manual auto-tuning mode. The method is to perform manual adjustment first, after the manual adjustment is basically stable, then start auto-tuning in the manual state, so that the output value of the meter will be limited to the current manual value + 10% and -10% range instead of outL and outH The scope of the definition, thus avoiding large changes in valves that are not allowed on the production site. In addition, when the response of the controlled physical quantity is fast, the manual self-tuning method can obtain more accurate self-tuning results.
(IV) Parameter function description The meter defines the meter's input, output, alarm and control mode through parameters. The following is the parameter function table:

Parameter code Parameter meaning Explain Setting range
ALM1 Upper limit alarm When the measured value is greater than ALM1 + Hy, the meter will generate an upper limit alarm. When the measured value is less than the ALM1-Hy value, the meter will release the upper limit alarm. Setting ALM1 to its maximum value (9999) can avoid the alarm function. -1999-
+ 9999 ℃ or 1 defined unit
ALM2 Lower limit alarm When the measured value is less than ALM2-Hy, a lower limit alarm is generated. When the measured value is greater than ALM2 + Hy, the lower limit alarm is canceled. Setting ALM2 to the minimum value (-1999) can avoid the alarm function. Ibid
Hy-1 Positive deviation alarm When using artificial intelligence adjustment, a positive deviation alarm is generated when the deviation (measured value PV minus a given value SV) is greater than Hy-1 + Hy. When the deviation is less than Hy-1-Hy, the positive deviation alarm is cancelled. When Hy-1 = 9999 is set (temperature is 999.9 ℃), the positive deviation alarm function is cancelled. 0-999.9 ℃
When using position adjustment, Hy-1 and Hy-2 are used as the second upper and lower absolute value alarms, respectively. or
0-9999 ℃
1define the unit
Hy-2 Negative deviation alarm When using artificial intelligence adjustment, a negative deviation alarm is generated when the negative deviation (the given value SV minus the measured value PV) is greater than Hy-2 + Hy, and the negative deviation alarm is canceled when the negative deviation is less than Hy-2- Hy. When Hy-2 = 9999 is set (temperature is 999.9 ℃), the negative deviation alarm function is cancelled. Ibid
Hy Hysteresis (dead zone, hysteresis) Hysteresis is used to avoid frequent on / off of position adjustment or frequent generation / disarming of alarms due to fluctuations in measurement input values. 0-200.0 ℃
For example, the influence of Hy parameter on the upper limit alarm control is as follows. Assume that the upper limit alarm parameter ALM1 is 800 ° C and Hy parameter is 2.0 ° C: or
(1) The meter is in the normal state. When the measured temperature value is greater than 802 ° C (ALM1 + Hy), it enters the upper limit alarm state. 0-2000 ℃
(2) When the meter is in the upper limit alarm state, the meter will release the alarm state when the measured temperature value is less than 798 ° C (ALM1-Hy). 1define the unit
Another example: When the meter adopts position adjustment or self-tuning timing, it is assumed that the given value SV is 700 ° C, and the Hy parameter is set to 0.5 ° C, and the reaction is adjusted (heating control as an example).
(1) When the output is in the ON state, when the measured temperature value is greater than 700.5 ° C (SV + Hy), the output is turned off.
(2) When the output is in the off state, when the measurement temperature is less than 699.5 ° C (SV-Hy), it is turned on again for heating.
For position adjustment, the larger the Hy value, the longer the on-off period, and the lower the control accuracy. Conversely, the smaller the Hy value, the shorter the on-off period, and the higher the control accuracy, but it is easy to cause malfunction due to input fluctuations, which reduces the life of mechanical switches such as relays or contactors.
Hy parameter has no effect on artificial intelligence regulation. However, since the self-tuning parameters are also adjusted in position, Hy will affect the self-tuning results. Generally, the smaller the Hy value, the higher the auto-tuning accuracy. However, the measurement value should be prevented from malfunctioning due to disturbance. If the digital jitter of the measured value is too large, first increase the digital filter parameter FILt to make the measured value jitter less than 2-5 digits, and then set Hy to be equal to the instantaneous value of the measured value.
At control method At = 0, using position adjustment (ON-OFF), it is only suitable for control when the demand is not high. 0-3
At = 1, using artificial intelligence adjustment / PID adjustment. Under this setting, the auto-tuning function can be started from the panel.
At = 2, start the auto-tuning parameter function, it will be set to 3 or 4 automatically after auto-tuning.
At = 3, using artificial intelligence adjustment. After the auto-tuning is completed, the meter automatically enters this setting. Under this setting, it is not allowed to start the auto-tuning parameter function from the panel. In order to prevent misoperation, the auto-tuning is repeatedly started.
I Hold parameter I, P, d, t and other parameters are the control parameters of the artificial intelligence adjustment algorithm. For the alignment adjustment mode (when AT = 0), these parameters have no effect. Due to the difficulty in temperature control and the widest application in industrial control, the definition of parameters is introduced with temperature as an example. 0-999.9
I is defined as the difference between the measured values when the control object is basically stable when the output value changes. The I parameter of the same system will generally change with the measured value, which should be taken near the working point. Or 0-9999
For example, for an electric furnace temperature control, the operating point is 700 ° C. To find the best I value, assuming that the output is maintained at 50%, the electric furnace temperature is finally stabilized at about 700 ° C, and at 55% output, the electric furnace temperature is finally stabilized at 750 ° C. about. Then the optimal parameter value can be calculated according to the following formula: 1define the unit
I = 750-700 = 50.0 (℃)
The value of I parameter mainly determines the integral effect in the adjustment algorithm, which is similar to the integration time of PID adjustment. The smaller the I value, the stronger the system integration effect. The larger the I value, the weaker the integration effect (increasing the integration time).
When I = 0, the system cancels the integral function and artificial intelligence adjustment function, and the adjustment part becomes a proportional derivative (PD) regulator. At this time, the instrument can be used as a secondary regulator in cascade adjustment.
P Rate parameter P is inversely proportional to the magnitude of the corresponding change in the measured value when the instrument output changes by 100% per second. When AT = 1 or 3, its value is defined as follows: 1-9999
P = 1000 ÷ Measured value increase per second (measurement unit is 0.1 ℃ or 1 defined unit)
If the meter is heated at 100% power and it is assumed that there is no heat dissipation, the electric furnace is 1 ° C per second, then:
P = 1000 ÷ 10 = 100
The P value is similar to the proportional band of the PID regulator, but the change is reversed. The larger the P value, the proportional and differential effects increase proportionally, and the smaller the P value, the proportional and differential effects weaken accordingly. The P parameter has nothing to do with the integral action. Setting P = 0 is equivalent to P = 0.5.
d Lag time For industrial control, the lag effect of the controlled system is the main factor affecting the control effect. The larger the system lag time, the more difficult it is to obtain the ideal control effect. The lag time parameter d is introduced by the artificial intelligence algorithm relative to the standard PID algorithm The new important parameter of XMD808 series instrument can perform some fuzzy rule calculations according to the d parameter, in order to solve the overshoot phenomenon and oscillation phenomenon more completely, and make the control response speed the best. 0-2000 seconds
d is defined as the time required for the electric furnace to start heating at a certain power assuming there is no heat dissipation. When the heating rate reaches a maximum of 63.5%. The unit of d parameter value in the meter is seconds.
The d parameter has an effect on the proportional, integral, and derivative of the control. The smaller d, the proportional and integral effects are increased in proportion, and the differential effect is relatively reduced, but the overall feedback effect is enhanced; otherwise, the larger d, the proportional Both the integral effect and the integral effect are weakened, while the differential effect is relatively enhanced. In addition, d also affects the function of the overshoot suppression function, and its setting greatly affects the control effect.
If d≤t is set, the differential function of the system is cancelled.
t Output period The t parameter value can be set between 0.5-125 seconds (0 means 0.5 seconds), it reflects the speed of the meter's calculation adjustment. The larger the value of t, the stronger the proportional effect and the weaker the differential effect. The smaller the value of t, the weaker the proportional action and the stronger the differential action. When the value of t is greater than or equal to 5 seconds, the derivative action is completely cancelled, and the system becomes proportional or proportional integral adjustment. When t is less than 1/5 of the lag time, its change has a small impact on the control. For example, if the system lag time D is 100 seconds, the control effect of t set to 0.5 or 10 seconds is basically the same. 0-125 seconds
T determines the principles as follows:
(1) When using time proportional output, if using SSR (Solid State Relay) or
As a silicon output control device, the control period can be shorter (usually 0.5-2 seconds), which can improve the control accuracy.
(2) When using the relay switch output, the short control cycle will shorten the mechanical switch accordingly.
Life, at this time generally set t to be greater than or equal to 4 seconds, the larger the setting, the longer the relay life, but too large will reduce the control accuracy, you should choose a value that can take account of both.
(3) When the instrument output is a linear current or a position proportional output (direct control of the valve motor's forward and reverse rotation), a small value of t can make the regulator output respond faster and improve control accuracy, but this may cause frequent changes in output current .
Sn Input specifications Sn is used to select input specifications. The input specifications corresponding to the values are as follows: 0-37
Sn Input specifications Sn Input specifications Note: When Sn = 10, the external part number is used for expansion.
0 K 1 S
2 WRe 3 T
4 E 5 J
6 B 7 N
August 9 Special Thermocouple Spare 10 User-specified extended input specifications
November 19 Special Thermocouple Spare 20 CU50
twenty one PT100 22-25 Special thermal resistance
26 0-80 ohm resistance input 27 0-400 ohm resistance input
28 0-20mV voltage input 29 0-100mV voltage input
30 0-60mV voltage input 31 0-1V (0-500mV)
32 0.2-1V voltage input 33 1-5V voltage input or
4-20mA current input
34 0-5V voltage input 35 -20- + 20mV (0-10V)
36 -100- + 100mV or 2-20V voltage input) 37 -5V- + 5V (0-50V)
dP Decimal point position For linear input: Define the position of the decimal point to match the value displayed by the user. 0-3
dP = 0, display format is 0000, no decimal point is displayed.
dP = 1, display format is 000.0, decimal point is in ten digits.
dP = 2, the display format is 00.00, the decimal point is in the hundreds place.
dP = 3, display format is 0.000, decimal point is in thousands.
When using thermocouple or RTD input: at this time dP selects the resolution of temperature display
dP = 0, the temperature display resolution is 1 ° C (the internal resolution is maintained at 0.1 ° C for control calculations).
dP = 1, the temperature display resolution is 0.1 ℃ (above 1000 ℃, it will automatically change to 1 ℃ resolution).
Changing the setting of the decimal point position parameter only affects the display, and does not affect the measurement accuracy and control accuracy.
P-SL Enter the lower limit display value It is used to define the lower limit scale value of linear input signal, and it is used for external setting and transmission output display. -1999 ~ + 9999 ℃ or 1 defined unit
For example, using a pressure transmitter to convert pressure (also temperature, flow, humidity and other physical quantities) into a standard 1-5V signal input (4-20mA signal can also be converted by an external 250 ohm resistor). For 1V signal pressure is 0, 5V signal pressure is 1mPa, I hope the instrument display resolution is 0.001mPa. Then the parameter settings are as follows:
Sn = 33 (select 1-5V linear voltage input)
dP = 3 (decimal point position setting, using 0.000 format)
P-SL = 0.000 (determine the pressure display value when the input lower limit is 1V)
P-SH = 1.000 (determine the pressure display value when the input upper limit is 5V)
P-SH Enter upper limit display It is used to define the upper limit scale value of the linear input signal.It is used in conjunction with P-SL. Ibid
Pb Main input translation correction The Pb parameter is used for translational correction of the input. To compensate for the error of the sensor signal itself, for thermocouple signals, when there is an error in the cold junction automatic compensation of the instrument, the Pb parameter can also be used for correction. For example: Assuming that the input signal remains unchanged, when the Pb is set to 0.0 ° C, the meter's measured temperature is 500.0 ° C. When the Pb is set to 10.0, the meter displays the measured temperature to be 510.0 ° C. The meter is internally calibrated when it leaves the factory, so the Pb parameter is 0 when it leaves the factory. This parameter is adjusted only when the user thinks that the measurement needs to be recalibrated. -1999 ~
4000
0.1 ℃ or 1 defined unit
oP-A output method oP-A indicates the method of the main output signal.The types of modules installed on the main output should be consistent. 0-2
oP-A = 0, the main output is time proportional output mode (adjusted by artificial intelligence) or bit mode (adjusted by bit). When the SSR voltage output or relay contact switch (normally open and normally closed) output is installed on the main module, Apply this method.
oP-A = 1, continuous output of linear current of any specification. A linear current output module is installed on the main output module.
oP-A = 2, time proportional output mode.
outL Lower output limit Usually used as a limit to adjust the minimum output. 0-110%
outH Output upper limit Limit regulation output maximum. 0-110%
AL-P Alarm output definition The AL-P parameter is used to define the output positions of the ALM1, ALM2, Hy-1, Hy-2 alarm functions. It is defined by the following formula: 0-31
AL-P = A × 1 + B × 2 + C × 4 + D × 8 + E × 16
When A = 0, the upper limit alarm is output by relay 1. When A = 1, the upper limit alarm is output by relay 2.
When B = 0, the lower limit alarm is output by relay 1. When B = 1, the lower limit alarm is output by relay 2.
Positive deviation alarm is output by relay 1 when C = 0; relay 2 is output when C = 1.
When D = 0, negative deviation alarm is output by relay 1. When D = 1, relay 2 is output.
When E = 0, the alarm symbol will be displayed on the lower display alternately, such as ALM1, ALM2, etc.
For example: The upper limit alarm is required to be output by the alarm 2 relay, and the lower limit alarm, positive deviation alarm and negative deviation alarm are to be output by alarm 1. When the alarm is not displayed on the lower display, the alarm symbol is obtained from the above: A = 1, B = 0, C = 0, D = 0, E = 1,
You should set the parameter AL-P = 1 × 1 + 0 × 2 + 0 × 4 + 0 × 8 + 1 × 16 = 17
CooL System function selection CooL parameters are used to select some system functions: 0-7
CooL = A × 1 + B × 2
A = 0, it is a reaction adjustment method. When the input increases, the output tends to decrease, such as heating control;
A = 1 is a positive-acting adjustment mode. When the input increases, the output tends to increase, such as refrigeration control.
B = 0, there is no power-on / setpoint modification for the alarm of the meter;
B = 1, the meter has the function of power-on / setpoint modification and alarm exemption (see the description below for details).
Addr mailing address When the instrument is equipped with an RS485 communication interface, the bAud setting range should be between 300-19200). The Addr parameter is used to define the instrument communication address, and the valid range is 0-100. The instruments on the same communication line should be set with a different Addr value to distinguish them from each other. 0-100
bAud Communication baud rate When the meter has a communication interface, the bAud parameter defines the communication baud rate, and the definable range is 300-19200bit / s (19.2K).
FILt Input digital filtering The instrument has an intermediate value filtering and a first-order integral digital filtering system. The value filtering is 3 continuous values and the intermediate value is used. The integration filtering is equivalent to the resistance volume fraction filtering in electronic circuits. When the digital jitter occurs due to input interference, digital filtering can be used to smooth it. The setting range of FILt is 0-20, 0 has no filtering, 1 has only median filtering, and 2-20 has both median filtering and integral filtering. The larger the FILt, the more stable the measured value, but the slower the response. Generally, when the measurement is greatly disturbed, the FILt value can be gradually increased, and the measurement value can be adjusted so that the instantaneous jump of the measured value is less than 2-5 words. When the meter is tested in the laboratory, FILt should be set to 0 or 1 to improve the response speed. 0-20
AM Operating status The AM parameter defines the automatic / manual working status.
AM = 0, manual adjustment status.
AM = 1, automatic adjustment status.
AM = 2, automatic adjustment status, and manual operation is prohibited. When manual function is not required, this function prevents manual operation due to misoperation.
When controlling the operation of the instrument through the RS485 communication interface, the computer (upper computer) can be used to implement manual / automatic switching of the instrument by modifying the AM parameters.
LocK Parameter modification level Meter When LocK is set to a value other than 808, the meter only allows to display and set 0-8 field parameters (defined by EP1-EP8) and the LocK parameter itself. When LocK = 808, all parameters can be set. LocK parameters provide a variety of different parameter operation permissions. After the user technicians configure the important parameters such as the input and output of the instrument, they can set LocK to a number other than 808. To avoid accidental modification of some important operating parameters by the site operator. as follows: 0-9999
LocK = 0, allows to modify field parameters and given values.
LocK = 1, can display and view field parameters. Modification is not allowed, but set value is allowed.
LocK = 2, can display and view the field parameters. It is not allowed to modify or set the given value.
LocK = 808, all parameters and given values can be set.
Note: 808 is the setting password for XMT808 series instruments. When using the instrument, other values should be set to keep the parameters from being modified at will. At the same time, production management should be strengthened to avoid arbitrary operation of the instrument.
If LocK is set to another value, the result may be one of the above results.
To return to all parameters after being locked (LOCK = 0), power off the meter and press the SET button to power on. When the meter displays LOCK, release the SET button and set LOCK to 808. When setting the field parameters, set the LocK parameter to 808, which can be unlocked temporarily. After finishing the setting, LocK is automatically set to 0. After unlocking, set LocK to 808 in the parameter table, then LocK will be saved as 808, which is equal to long-term unlocking. .
EP1- Field parameter definition When the meter is set up, most parameters will no longer need to be set by field workers. In addition, on-site operators may not understand many parameters, and misoperations may occur to set the parameters to the wrong values, making the instrument unable to work properly.
EP8 EP1-EP8 define 1-8 field parameters for use by field operators in the parameter table. Its parameter value is other parameters than the EP parameter itself, such as ALM1, ALM2, etc. When LOCK = 0, 1, 2 and other values, only the defined parameters can be displayed, and other parameters cannot be displayed and modified. This function can speed up the modification of parameters and prevent important parameters (such as input and output parameters) from being modified by mistake.
The parameters EP1-EP8 can define up to 8 field parameters. If the field parameters are less than 8 (sometimes not even), the parameters to be used should be defined from EP1-EP8 in order, and the first parameter that is not used is defined as nonE. For example, an instrument site often needs to modify the two parameters of ALM1 (upper limit alarm) and ALM2 (lower limit alarm). The EP parameters can be set as follows:
LOC = 0, EP1 = ALM1, EP2 = ALM2, EP3 = nonE
If the on-site parameters are not needed after the instrument commissioning is completed, the EP1 parameter value can be set to nonE at this time.
(5) Supplementary explanation of some functions
1. When linear current output of any specification (OP-A = 1)
The upper output limit and lower output limit define the current output specifications of the meter, and the range is arbitrarily set between 0-22mA. For 0-10mA output, set outL = 0 and outH = 100 (unit: 0.1mA). 4-20mA is set to outL = 40, outH = 200. Can also be defined as non-standard output, such as 2-8mA output, set outL = 20, outH = 80 and so on. Note that setting outL must be less than outH to have a valid output.
2. Time proportional output (0P-A = 2; OP-A = 0 relay output or SSR voltage output)
Time proportional output is achieved by adjusting the relay's on-off ratio (or SSR voltage output level ratio) for a fixed period of time to achieve output size changes. The time proportional output can be regarded as a square wave whose period is equal to the control period t. The output value is proportional to the duty cycle of the square wave, and its value is variable from 0% -100%. Users with special requirements can use OutL and OutH to limit the range of time proportional output value. For example: When the user needs to limit the output between 20-60%, you can set OutL = 20 and OutH = 60. Generally, when time proportional output is set, if OutL = 0 and OutH = 100, there is no output limit.
Note: When OP-A = 2, the alarm output cannot be used.
3. External setting When external setting is allowed (refer to CooL parameter description), the meter can input 1-5V voltage signal from its 1-5V terminal to indicate its set value. The externally given scale can be determined by the P-SL and P-SH parameters. If the externally given voltage signal is less than 1V, the externally given function is automatically cancelled and the internally given value is used instead. When using the external reference function, the meter measurement input cannot be in the 1-5V / 0-5V range, which has no effect on the thermocouple, thermal resistance and mV voltage input. If the measurement input is 0-10mA or 4-20mA, you can set the main input of the instrument to 0-1V or 0.2V-1V, and then connect an external 100 ohm or 50 ohm resistor. The external given function enables the instrument to form a ratio or cascade adjustment system to complete complex adjustment functions.
4. Setting method with YTZ-150 resistance remote transmission pressure gauge Instrument setting parameters: Sn = 27
dP decimal point position setting
P-SL display lower range limit setting
P-SH display range upper limit setting
Correction of line resistance translation between Pb meter and remote resistance pressure gauge



Note: Display range = upper limit of instrument display-lower limit of instrument display
Resistance range = resistance value corresponding to remote resistance pressure gauge range
Starting resistance = resistance value corresponding to the beginning of remote resistance pressure gauge
Full-scale resistance = resistance value corresponding to full-range resistance pressure gauge
Start range = lower limit of meter display
Full scale = upper limit of meter display






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