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 […]
Gas turbine flow meter fault analysis – meter shows 0 with no flow but current output Read More »
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.
Gas turbine flow meter fault analysis – screen does not light up Read More »
● 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
Turbine flowmeter fault – meter slowly zeroing in operation Read More »
● 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
Turbine flowmeter fault – flow indication when not running Read More »
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
Turbine flowmeter failure – 485 communication not working Read More »
● 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
Turbine flow meter fault – no pulse output Read More »
● 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
Turbine flowmeter fault – current zero point drift Read More »
● 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
Turbine flowmeter fault – screen does not light up Read More »
(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
Turbine flowmeter fault – current output abnormal Read More »
The default address of the instrument is 001, baud rate 9600, n without checksum, 8 bits of data, 1 bit of stop bit, default co-instrument 0 If the battery supply and the two-wire system do not support the 485 functions, the battery can be removed and the 24V supply can be confirmed as normal. The
Gas turbine flow meter fault-485 communication problems or no communication Read More »
