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User Manual
2021 Release 2
WiseAir Technologies India LLP
[email protected] +91 90477 78715
WAFS 103 DIFFERENTIAL
PRESSURE PITOT TUBE FLOW METER
Page 30 of 32
MEASURE TO MANAGE
13.4 My Sensor Isn't Reading Correctly
If your sensor is not reading the correct values, follow these steps.
1. Make sure the sensor is suitable for your system. Refer to the “Specifications”
section for details.
2. Make sure the sensor is calibrated. Sensors should be calibrated every 2 years.
Contact your local dealer or WiseAir Technologies for calibration.
3. Make sure the sensor tip is free of contamination.
4. Make sure the sensor is installed correctly. Refer to “Installation — Mechanical”lor
more information. The sensor should be installed vertically to the pipe, away from obstructions.
Typical installation errors include:
Installing sensor upside down or at an angle
Installing sensor too close to bends and other obstructions
Sensor tip is not in the center of the pipe, eg its too low or too high
Installing sensor in the opposite direction to the gas flow
Installing sensor directly on the outlet of the compressor
Gas flow rate too low.
Note:
below 10 Nm/s the flow meter reading will be zero
5. Make sure the sensor is wired correctly. Refer to“Installation — Electrical(Wiring)”
section for more information.
6. Make sure the following sensors settings are correct:
Inner Pipe diameter (not outer diameter)
Unit of Measurement
Gas Type
Communication settings (RS485 or Analog)
Refer to the “Setting Up the Flow Metef” and “Communication Settings' sections for more
information.
7. If you have adjusted Normalization or Advance Settings, reset these to factory
default.
Normalization default setting: Temperature = 20°C and Pressure = 100 kPa.
8. Is your associated equipment compatible with the flow meter?
If you are still having problems, contact your local dealer or WiseAir Technologies.
13.5 How Do I Clean the Sensor?
If you need to clean the sensor it is recommended to use a clean, dry cloth. For
stubborn marks, use distilled water or isopropyl alcohol only.
Please note: contamination on the sensor tip will affect calibration and accuracy of the
sensor. Removal of the contamination may not fix the issue.