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MAN-147-0018-A
Confirm the logger has the appropriate interface for the pressure or depth sensor. Then
connect the sensor to the relevant logger interface.
Note:
Do not connect the sensor to the measurement point before going through the
calibration
process (see below) and then
re-zero
(to local atmospheric
pressure).
For a
pressure sensor
, attach to the measurement point and (if applicable) bleed any
connecting hose.
For a
depth sensor
, the sensor should be weighted down or mounted securely at the
bottom of the water channel, using a fixture (e.g., a carrier plate or anchoring bracket) if
required. The cable should also be secured in place to prevent moving water from
acting on the cable to pull the sensor out of position or stress any connections.
Calibration Process (using calibration values from the cable):
Prior to using the sensor, the logger and sensor pair must be calibrated to give correct
readings.
This method can be used by an installer to pair and calibrate a pressure sensor to the
logger.
HWM supplied pressure / depth sensors usually have calibration values shown on the
cable (see Figure 14). Use IDT to add the details from the calibration label on the cable
into the logger using the guidance within the IDT user-guide.
The calibration process must occur before the re-zero of the pressure sensor.
After following the calibration process and re-zero process, the transducer can be
located at (or fitted to) its measurement point.
The logger must be correctly set up to make measurements from the sensor. Refer to
the IDT user-guide for further details.
External Pressure
input on logger.
(Logger shown is not Multilog2)
HWM pressure transducer
will include a calibration
details label.
Figure 14. Example of a pressure sensor calibration label
