Flow meter

● 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

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

Whether the customer has moved the parameters Is the installation in accordance with the requirements Whether the flow rate is within the range Is the temperature and pressure display normal, if abnormal check steps refer to 5 or 6 If the instrument is connected to an external power supply or output, remove the cable and

● Whether the customer has set the parameters ● Is the installation in accordance with the requirements ● Whether the flow rate is within the range ● Whether the temperature and pressure are normal if they are abnormal check steps 5 or 6 ● There are many impurities on the strainer or filter at the

Abnormal instrument temperature display 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, return the circuit board to the factory or send a replacement board. Use a multimeter to measure the

Ask if the flow rate at the site is lower than the lower limit, then change the small flow rate to 0 If there is a stable frequency and FinFL=XX.XHZ is displayed, it means that the frequency has been cut off, and it is necessary to modify the appropriate frequency band into the parameter, if

● Check that the temperature and pressure of the instrument are displayed properly ● Ask the customer about the inaccuracy and the basis for it; (for automatic control intermittent use the measurement will not be accurate) ● Whether the flow range used on site meets the requirements of the instrument, requesting a reference to the

485 communication cannot be connected The parameter confirmation function is selected for the 485 functions refers to the manual The default address of the instrument is 001, baud rate 9600, n without parity, 8 bits of data, 1 bit of stop Is the instrument wired correctly, connect 24V COM 485A 485B, battery power supply and