What to do if gas does not flow through Aalborg GFM 17 Measuring Instruments?
If gas isn't flowing through your Aalborg GFM despite inlet pressure, and the LCD Display and output voltage signal show zero flow, the filter screen might be obstructed at the inlet. Flush it clean, disassemble to remove impediments, or replace the filter screen (see 6.2 on page 9). Note that calibration accuracy can be affected.
What to do if display reading does not respond on zero adjustment of Aalborg GFM 17 Measuring Instruments?
If, after a 15-minute warm-up with no flow, your Aalborg Measuring Instruments display no zero reading and the display reading doesn't respond to zero adjustment, it suggests that the power supply voltage is less than 11.0 Vdc. Measure the voltage on pins 4 and 5 of the 9 pin D-connector. If the voltage is indeed less than 11.0Vdc, replace the power supply with a new one (regulated 12.0 Vdc, 250 mA minimum is recommended).
Why LCD Display reading and analog output fluctuate during flow measurement on Aalborg GFM 17?
If the LCD Display reading and analog output fluctuate widely during flow measurement with your Aalborg Measuring Instruments, it might be because the output signal is shorted on the GND or overloaded. Check external connections to pins 2 and 3 of the D-connector and ensure the load resistance exceeds 1000 Ohm.
General| Type | Mass Flow Meter |
|---|---|
| Material | Stainless Steel |
| Process Connection | 1/4" |
| Output Signal | 0-5 VDC or 4-20 mA |
| Power Supply | +15 VDC to +24 VDC |
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