Environmental test chamber temperature controller operation and use method
1. When the controller is powered on, the upper row of the display window shows the "index number and version number", and the lower row shows "range value" after about 3 seconds into the normal display state.
2. Reference and setting of temperature and constant temperature time
1) Without constant temperature timer:
Click the "Settings" button to enter the temperature setting state, the lower display of the display window shows the prompt "SP", the upper row shows the temperature setting value (first digit value flashes), can be through the shift, increase, decrease key Modify the desired setting value; click "Settings" again to exit this setting and the modified setting will be automatically saved. In this setting state, if no key is pressed within 1 minute, the controller will automatically return to the normal display state.
2) If there is a constant temperature timer function, click the "Settings" button to enter the temperature setting state. The lower display of the display window shows the prompt "SP". The upper row shows the temperature setting value (the first digit value flashes). The modification method is the same as above. And then click the "Settings" button, enter the constant temperature time setting state, display the lower display prompt "ST", the upper display of the constant temperature time setting value (the first digit value flashes); then click "Settings" Press this button to exit this setting. The modified settings are automatically saved.
When the constant temperature time is set to “0â€, it means there is no timing function, the controller runs continuously, and the lower row of the display window shows the temperature setting value; when the setting time is not “0â€, the lower row of the display window shows the running time or temperature. Setpoint (Refer to 7. Runtime display mode (value of parameter ntt) in the internal parameter table-2). When the run time is displayed, the decimal point of the next lower row is lit. After the measured temperature reaches the set temperature, it is timed. When the device starts timing, the decimal point in the lower row flashes. When the time is up, the end of the operation is displayed. The lower display of the display window shows “Endâ€. The buzzer sounds and the buzzer sounds for 1 minute and stops beeping. After the operation is finished, press and hold the "Reducing" button for 3 seconds to restart the operation.
Note: If the temperature setting value is increased during the timing process, the meter will start timing again from 0. If the temperature setting value is decreased, the meter will continue to keep time.
3. Sensor abnormal alarm If the upper row of the display window shows “---â€, it means that the temperature sensor is faulty or the temperature exceeds the measurement range or the controller itself is faulty, the controller automatically disconnects the heating output, the buzzer continuously sounds, and the alarm light is on, please Check the temperature sensor and its wiring carefully.
4. When the deviation exceeds the over-temperature alarm, the buzzer sounds and the buzzer sounds, and the “ALM†warning light is on; when the deviation alarm occurs, the buzzer sounds and the buzzer sounds, and the “ALM†warning light flashes. If an overtemperature alarm occurs due to the set value, the "ALM" warning light will be on but the buzzer will not beep.
5. When the buzzer sounds, you can press any key to silence.
6. “Shift†key: Click this button in the setting state to shift the setting value by flickering.
7. “Reducing†key: Pressing this key in the setting state can decrement the set value. Long press this key to continuously decrease the set value.
8. “Increase†key: Click this key to increase the set value in the setting state. Long press this key to increase the set value continuously.
9. If no key is pressed within 1 minute in the setting state, the controller will automatically return to the normal display state.
(II) System self-tuning System self-tuning can be performed when the effect of temperature control is not satisfactory. In the process of self-tuning, there will be a large overshoot of temperature, and users should fully consider this factor before performing system self-tuning.
In the non-setting state, long press "Shift/Auto-tuning" key for 6 seconds to enter the system self-tuning program, "AT" indicator light flashes, after the auto-tuning is completed, the light will stop flashing, the controller will get a group more Good system PID parameters, parameter values ​​are automatically saved. In the process of system self-tuning, long-press "shift / auto-tuning" key 6 seconds to stop the auto-tuning process.
If there is an upper deviation over temperature alarm during the system self-tuning process, the "ALM" warning light is off and the buzzer does not sound, but the heating alarm relay will be automatically disconnected. The "Set" key is invalid during system auto-tuning. In the system self-tuning process, whether or not there is a constant temperature setting, the lower display of the controller display window always shows the temperature setting value.
(III) Reference and setting of temperature internal parameters Press and hold the setting key for about 3 seconds. The controller display window displays the password prompt “Lc†in the lower row. The upper row shows the password value, and the increase, decrease, and shift keys are used. , modify the required password value. Click the Set button again. If the password value is not correct, the controller automatically returns to the normal display state. If the password value is correct, it enters the internal temperature parameter setting state, and then click the set button to modify each parameter in turn. Press and hold the set button for 3 seconds again to exit this status. The parameter value is automatically saved.
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