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3.3 Installation in Boreholes
Before installing make sure both pressure and temperature sensors are working and
record initial readings with a portable readout box (GK-403 or GK 404).
Push the sensor into the borehole by whatever means are chosen. This may include
attachment to grout pipes, special installation rods or other apparatuses being
inserted into the borehole at the same time.
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TAKING READINGS
The 4500HT is usually connected to a datalogger. But for initial set up it is often
convenient to use a portable readout box. In the case of dataloggers the pluck voltage
setting to use is 12Volts..
4.1 Wiring Diagram
For the 4500HT pressure transducer the red and black leads are connected to the
pressure transducer and the green and white leads are connected to the vibrating wire
temperature sensor.
4.2 Operation of the GK-403 Readout Box
The GK-403 can store gage readings and also apply calibration factors to convert
readings to engineering units. Special GK 403 units can be provided that have a 12Volt
pluck. Consult the GK-403 Instruction Manual for additional information on Mode "G" of
the Readout. The following instructions will explain taking gage measurements using
Modes "B" and "F"
Connect the Readout using the flying leads, the red and black clips are for taking both
the pressure reading, and the temperature reading. [The white and green leads of the
flying leads are not used].
1. Turn the display selector to position "B" (or "F"). Readout is in digits
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