1. Set temperature: Press the SET button to set or view the temperature set point. Press the SET button and the digital tube characters start to flash, indicating that the instrument has entered the setting state, press the △ key to increase the set value, press the ▽ key to decrease the set value, press and hold the △ button or ▽ key The data will change rapidly, and press the SET button again The instrument returns to the normal working state and the temperature is set.
2. Return control (XMT201-C): Press the SET button for 3 seconds to enter the inner parameter setting state. The first parameter that appears and flashes is C00, that is, the return difference value, the return control parameters should be carefully adjusted, the instrument controls the heating output value to the set value, when the temperature falls to the set value and subtracts the difference value, it starts to heat again, and the output (relay) is not active in the return range, so that the relay can reduce the number of actions to prolong the life of the relay. For example, if the setting value is 80.0°C and the return difference is 0.5, the relay is released when the instrument controls the heating to 80.0°C, and the relay is engaged when the temperature drops to 80.0°C-0.5°C=79.5°C. The larger the return difference, the less the relay actions, and the larger the return difference, the control accuracy will be reduced. After adjusting the differential parameters, press the SET button for 3 seconds and the meter returns to normal working state.
3. Advance setting (XMT201-E): Press the SET button for 3 seconds to enter the inner parameter setting state. The first parameter that appears and flashes is E00, that is, the advance amount of heating stop, the advance parameter should be carefully adjusted, in order to reduce the temperature overshoot, the instrument will cut off the heating in advance when controlling the heating output. When the temperature drops below the lead amount, the heating starts again, and the output (relay) does not operate within the range of the set value and the lead amount, so that the number of relay actions can be reduced to prolong the life of the relay. For example, if the setting value is 50.0°C and the advance amount is 0.5, the relay is released when the instrument controls the heating to 49.5.0°C, and the relay is engaged again when the temperature drops to 50.0°C-0.5°C=49.5°C. The larger the advance amount, the fewer the relay actions, and the excessive advance will reduce the control accuracy. After adjusting the advance parameters, press the SET button for 3 seconds and the meter returns to normal working state.
4. Time proportional setting (XMT201-P): Press the SET button for 3 seconds to enter the inner parameter setting state. E: is the proportional band offset, and the E parameter can make the actual control point translate. Even if the center of the time scale shifts, the E value can be positive or negative depending on the heating system. P: is the proportional band, that is, the proportional control value, in order to facilitate understanding and also to make the proportional with a larger representation space, the proportional zone of this instrument is a unilateral proportional band, that is, the actual proportional zone is 2 times the P value. With the actual control point as the center, the output heating ratio is evenly distributed from 0% to 100% in the P-value range. T: For the heating output cycle cycle, that is, the relay working cycle cycle, the T value is small and the control effect is good, but the T value is too small The relay will reduce the life due to frequent work. Generally, the T value is taken for 20-60 seconds. For example, if P is set to 4.0 (the actual proportional band is 8.0), the temperature is set to 60.0 degrees, and E is set to 2.0, the actual control point is 58.0 degrees, and when the temperature reaches 54.0 degrees, the instrument will enter the proportional band control state.
5. Intelligent control parameter setting (XMT201-D): Press the SET button for 3 seconds to enter the inner parameter setting state. E: This parameter is the advance of heating stop when P = 0, when P is not equal to 0, the instrument is the intelligent PID working mode, and when P is not equal to 0, the E parameter is meaningless. P: is the proportional band, that is, the proportional control value, the instrument takes the set value as the center, and the P value is distributed on both sides of the set point, and the instrument works in PID mode within the P value range. T: For the heating output cycle cycle, that is, the relay working cycle cycle, the T value is small and the control effect is good, but the T value is too small The relay will reduce the life due to frequent work. Generally, the T value is taken for 20-60 seconds. To simplify operation, the integration time (I) and derivative time (D) of the meter are designed as hidden parameters, and their default values: I=180, D=45.
6. Correction of error: The displayed value can be corrected when confirming that the value displayed by the instrument is not the correct measured value. Press the SET button for 3 seconds to enter the inner menu of the instrument, the first parameter that appears and flashes is E00, that is, the advance amount, and then press the SET button again to appear and flash the parameter that is the error correction parameter, and this parameter can be modified with the △ or ▽ key. The error correction ranges from -9.9°C to +9.9°C, and after the correction is completed, press the SET button again to exit. The correction value of the meter is 0.0 when it leaves the factory, and it is necessary to prevent the correct meter from being corrected to the wrong point when it is used.
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