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Note: For holes deeper than 3m, to avoid having a very long sensor assembly above
ground, thread all the required tubes onto the cable at the start but do not connect them all
together. Connect each tube into the assembly in turn as the probe is lowered into the hole.
13.3.3. Taking Measurements
13.3.3.1. Measurement Range
Note: Set the meter to the 1.0 range for measurements with the MS2H probe.
Note: The probe is not intended to be used on the 0.1 high resolution setting.
13.3.3.2. Temperature Drift Effects
The sensor is compensated to minimise temperature variation, but some drift is inevitable.
For best results, allow the probe temperature to stabilise at the test hole temperature before
commencing readings.
Note: Allow at least 30 seconds settling time for every
o
C difference between initial probe
temperature and test hole temperature.
In addition, to allow adequate settling time, take ‘air’ readings as the first and last
measurements, and compensate for any drift during the measurement run.
Note: If the Multisus or Bartsoft PC softwares are being used then the readings can be
corrected automatically to include drift compensation at the end of the run.
13.3.3.3. Using Multisus Software
Multisus software for a Windows PC simplifies use of the MS2H probe by automatically logging
data from the MS2 meter and correcting readings for temperature drift. The software is provided
with the meter.
Note: Multisus v2.4 is needed or later for full support of the MS2H down-hole probe.
Note: Bartsoft is a newer software that can also be used with the MS2H.
A separate manual for using Multisus is provided with the purchase, giving full details of the
features for the MS2H probe. A summary of the measurement procedure is as follows.
1. Follow the earlier procedure to assemble the probe and connect to the meter. Connect
the meter to the PC, start the Multisus program and ensure the meter and PC are
communicating correctly (see Multisus manual for details).
2. Using the file menu, select a new data file for the MS2H probe.
3. Select SI or CGS, and 1.0 range on the MS2 meter.
Note: For the MS2H probe, the 0.1 range is not recommended.
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