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Frequently Asked Questions of Firstrate Display and Control Instruments

(Summary description)

Frequently Asked Questions of Firstrate Display and Control Instruments

(Summary description)

Information
1. How to define the installation size of the instrument opening?
Answer: According to the external structure size of the instrument, define the opening installation structure size:
      For the instrument with a size of 160X80mm, the opening installation size is 152.0X76.0mm;
      For the instrument with a size of 96X48mm, the opening installation size is 92.0X45.0mm;
      For the instrument with a size of 96×96mm, the hole installation size is 92.0X92.0mm;
      For the instrument with a size of 72×72mm, the opening installation size is 68.0X68.0mm;
 
2. After the instrument is connected to the transmitter, the output value of the transmitter is normal, and the displayed pressure value is different from the real pressure value. How to adjust?
Answer: The display value of the meter is different from the real pressure value. In this case, the meter needs to be adjusted;
      Steps: Enter the password setting (when the meter is in the measurement state or the first group of parameter symbol display state, the password setting can be performed)
      ① Press and hold the setting key ● do not release it until OR is displayed;
      ② Press the ← key to enter the modification state, and modify it to 1111 with the cooperation of the ←, ▲ and ▼ keys;
      ③ Press the MOD key to complete the password setting;
      ★ The password will be automatically cleared when the instrument is powered on or when there is no key operation for more than 1 minute.
      ④ By pressing and holding the setting key ● without releasing, enter each parameter group in sequence, and the indicator will display the symbol of the first effective parameter in this group;
      ⑤ After entering the group of the parameter to be set, press the MOD key to select the parameters to be set in this group in sequence;
      ⑥ Press the ← key to call out the original setting value of the current parameter, the flashing bit is the modified bit;
      ⑦ Use the ← key to move the modified position, the ▲ key to increase the value, and the ▼ key to decrease the value to modify the parameter to the required value;
      According to the above steps, adjust the parameter group to the fourth group, find the F-r parameter setting, first check the original setting value of this parameter, and then modify the value, the value to be modified is:
      Modified value of F-r = actual pressure value X F-r (original setting value) / original display value
      After the setting is completed, press the MOD key to save the modified parameter, and go to the next parameter. When the parameter symbol is displayed, press and hold the setting key ● until it exits the parameter setting state, and displays the current normal after adjustment The pressure value.
      Example of span calibration: the required display value is 50.0 X F-r (the original parameter 50.0)/49.96 (the actual output display value) = the F-r value to be updated (50.04)
          
3. The sensor is connected to the meter, and the meter does not display 0 when it is not pressurized. How to adjust?
Answer: In the case of non-pressurization, the indicator display is not zero usually: 1. The influence of the sensor installation process, after sealing, there is a trace of air pressure in the pipeline; 2. The environmental impact of the air pressure difference in the site;
      Zero the meter for negligible zero offset value;
       A. Using the external zero calibration method of the instrument, press the instrument ← to reset; (in this case, after power failure, power on again, and zero calibration is required)
       B. Press the previous question and answer to enter the parameter setting, Cn-R Cn-A zero point correction value, if the zero point display offset +0.5, then the value parameter needs to be modified to -0.5, and the zero point display is 0 value; Operation, will not be affected after power failure)
 
4. How to set the display peak value and clear the peak value?
Answer: The FbRo item can be found in the fourth group of parameters in the instrument setting menu. When 0 is selected, the meter only displays the current measured value; when 1 is selected, the peak value and the current measured value can be switched through the MOD key. When the peak value is displayed, the last The decimal point lights up to show the difference; when 2 is selected, the peak value is always displayed, and the last decimal point lights up.
        Press ▼ to clear the peak value.
        Communication read peak command
        # AA ↙ Read current value
        # AA01 ↙ Peak reading
        Note: The communication rate bRud must be set to 9600
        ★ This setting is only available when customers order an instrument with this function.
 
5. The input signal of the instrument is faulty and O.L is displayed. How to deal with the fault?
Answer: The meter displays O.L, indicating that the input signal is faulty. The input signal may be too small or too large. You can focus on checking whether the sensor signal output is normal. A multimeter can be used to detect the output signal of the sensor or connect to the line of the meter.

Links: Hunan Yuanhang Holdings    Hunan Aotong Intelligence 

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