(4) Main menu S-H: ( Alarm upper limit setting)
When the pressure value is displayed on the main interface, press the M key to enter the main menu, press the key to select SH-
MENU. Short press the key to enter the pressure upper limit setting, press the key to select the pressure value. The current digit
LCD flashes. Press the current selection digit value to increase. Press M Key to save the current upper limit pressure value. Press E key
to return to the previous menu. Note: The upper limit of pressure should be greater than the lower limit,it can be set correctly. Otherwise it
will prompt an error and not save.
(5) Main menu S-L: (Alarm lower limit setting)
When the pressure value is displayed on the main interface, press the M key to enter the main menu. Press the key to select SL-
MENU. Short press the key to enter the pressure lower limit setting. Press the key to select the pressure value, the current digit LCD
flashes. Press the key current selection digit value to increase. Press M Key to save the current upper limit pressure value. Press E
key to return to the previous menu. Note: The upper limit of pressure should be greater than the lower limit,it can be set correctly.
Otherwise it will prompt an error and not save.
(6) Main menu bEEP: (Alarm switch setting)
When the pressure value is displayed on the main interface, press the M key to enter the main menu. Press the key to select bEEP-
MENU. Short press the key to enter the alarm switch setting, press the key to select the alarm switch on or off. Press the M key to
save the current alarm Switch status setting. Press E key to return to the previous menu.
(7) Main menu no.: (peak viewing mode)
When the pressure value is displayed on the main interface, press the M key to enter the main menu. Press the key to select no.-
MENU. Short press the key to enter the maximum pressure peak view mode. Press the key or key to select the Min. pressure
value or the Max. pressure value. Press the E key to exit the pressure view Mode, return to the previous menu.
(8) Main menu rSEt: (restore factory settings)
When the pressure value is displayed on the main interface, press the M key to enter the main menu. Press the key to select rSEt-
MENU. Short press the key to enter the password input mode. Press the key password value selection digit, the current digit LCD
flashes. Press the key current selection digit value to increase. Press the M key to save the current Enter the password. The factory
setting password is: 1234. If the input is correct, the factory settings will be restored. If the input is incorrect, the error code Err4 will be
displayed. Press the E key to return to the previous menu.
4. System error flag:
Err1: Clear zero Failed.
Err2: The upper limit setting failed (the upper limit must be greater than the lower limit)
Err3: The lower limit setting failed (the upper limit must be greater than the lower limit)
Err4: The restoring factory settings password is entered incorrectly
Err5: Pressure transmitter error
Wiring definition
The wiring terminal of M31 series pressure transmitter is shown in Figure 1.The terminal definition is shown in
Table 1.
Notes:
1. Make sure that the wiring is correct. If the power cord is connected to the communication terminal by mistake, it will
cause irreversible damage to the communication part!
2. Select the output type according to the M31 transmitter and connect the terminals correctly.If the transmitter type is
voltage output, connect the DC power supply to the power supply interface. Connect the positive pole of the voltmeter
to the "U-OUT" voltage detection terminal and the negative pole to "—" terminal.
3. In order to ensure normal long-distance communication, you can use a shorting cap to insert the "CN2" header,
which has a 120 Ωmatching resistor in parallel.
