First encounters
the sensor masses. Instead, if possible, you should move the instrument
within the borehole to a place where it can lie closer to vertical.
If you need to use the outputs of the inclinometer for some other purpose, you can
also connect a multimeter to the banana sockets on the inclinometer monitor unit.
3.4 Operating the hole-lock
The hole lock, if fitted, can be extended and retracted using the hole lock control unit:
Warning:
The hole lock may be using high-voltage mains (outlet)
power.
To operate the hole-lock:
1. Connect the hole-lock control unit to the HOLELOCK POWER connector of the
breakout box, and to a mains power supply. Alternatively, connect a 12 – 24 V
DC power supply across the input terminals of the hole lock control unit.
Caution:
Do not connect both DC and mains power at the
same time.
The hole-lock control unit supplied in regions with 220 V AC mains power
differs from that supplied for 110 V AC mains power. You should ensure that
you provide the correct voltage to the hole lock control unit, otherwise
damage may result to the sensor.
2. If you are using a deep-borehole hole lock control unit, set the dial to zero.
17
Issue G - November 2019
