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● 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

● Pulse mode and pulse equivalent can be modified in the parameters, refer to the manual for details ● Pulse active output, PNP, NPN, and OC hardware can be commissioned at the rear terminal board, refer to the manual for details ● Use a multimeter to measure the voltage between FOUT-C and COM, under the

● The blue potentiometer can be adjusted by unscrewing the front cover directly; see picture Left zero, right full 4mA potentiometer on the left On the right is the 20mA potentiometer

● Measure if the voltage supply to the instrument is normal or if the battery is charged ● Consider whether the outdoor installation is damp from water ● Loose circuit board wires ● Circuit board failure return to factory for repair or issue replacement board

(1) Three-wire current, current output is not normal: ● Pay attention to the wiring: 24V, COM (GND), IOUT ● Measure the voltage between IUOT and COM (GND), if there is current, use a multimeter to measure the current again, if not, the board is faulty. (2) Two-wire current wiring, the instrument does not light up