Flow meter

● Interference problem: Ask the instrument if there is an external power supply, if there is, remove both the external power supply and the signal line, and observe if it is zeroed with battery power only, if it is zeroed, there is interference and the interference measure that GND is connected to the case ground. […]

The pressure range selection is large, and the small field pressure cannot be collected. The pressure calibration parameters in the instrument have been restored to the factory settings (if the factory is restored, the voltage value in the P21-P25 screen will be 0.0) and need to be re-implanted. The D2 model is slow in collecting

If the temperature display is abnormally high when the battery is powered, the battery is dead. If the temperature display is below zero or much lower, the circuit board temperature chip is damaged and the board should be returned to the factory or a replacement board should be issued. Use a multimeter to measure the

● Since D2 is a dual power supply, to determine whether 24V is properly powered, unplug the battery or test with a multimeter. ● Pulse equivalent post terminal dial code 1 to ON, 2, and 3 to OFF. ● Pulse active output, whether PNP type is matched with the site. ● Measure the voltage between

● Since D2 is a dual power supply, to determine whether 24V is properly supplied, unplug the battery or test with a multimeter. ● Pulse equivalent after the terminal dial code 2 set ON, 1 and 3 set OFF, equivalent parameters refer to the manual optional ● Pulse equivalent active output, whether PNP type is

Connect two-wire or three-wire, three-wire from the terminal AGND (GND) lead break wire with the case short or the black jumper cap of the rear panel from ON to OFF end, or remove the signal line at the end of the instrument, a single measurement of the instrument end of the current output is normal

Measure if the power supply voltage is normal or if the battery (not less than 3V) is charged at the instrument end Consider whether the outdoor installation is damp from water The circuit board wires loose  If the circuit board is faulty, return it to the factory for repair or send a replacement board.

● Worn or damaged movement ● The flow rate becomes smaller due to a gradual lack of pressure in the pipeline under working conditions ● Solution: first dismantle the watch body to verify that the movement is normal

 ● Whether it is an industrial frequency disturbance (50HZ), characteristic: a value is displayed that does not change; this value can be calculated according to the following formula q—instantaneous flow rate (m3/h) f — frequency (HZ) K — coefficient (times/m3) ● Whether the wiring is laid in a line slot with strong electricity (220V or

Default address 001, baud rate 9600, n without parity, 8 bits of data, 1 bit of stop Is the instrument wired correctly, connect 24V GND 485A 485B, battery power and two-wire system do not support 485 functions, confirm 24V power supply is normal The instrument communication is based on the MODBUS RTU protocol, note that