MANUAL – REFLEX EZ-TRAC™ | 68
10.6.1 Initialise instrument
The REFLEX EZ-TRAC™ is initialised for the downhole survey, which
includes synchronisation of the clocks in the instrument and the
control unit and that the instrument memory is cleared.
If a stored zeroing is used, a serial number check is performed to
ensure that the present instrument is the same as the one used to
register the stored zeroing.
Figure 80 Initialise instrument
Initialise instrument
1. Direct the IR port of the REFLEX™ EZ-COM unit towards the IR port
of the instrument.
2. Select INIT to initialise the instrument for the downhole
measurement.
3. Do not break the IR connection until ‘Ready for downhole
measurement’ is displayed.
4. Thread the top coupling onto the instrument.
10.6.2 Assemble survey system – Gravity Tool Face
For the Gravity Tool Face mode, the survey system with the
REFLEX EZ-TRAC™ instrument, the bull plug and the mule shoe is
already assembled at this point. Continue to the section Load tell tale
below.
10.6.3 Assemble survey system – Magnetic Tool Face
For the Magnetic Tool Face mode, in total six aluminium extension
rods have to be assembled with the survey system to avoid magnetic
interference from the wedge.
When the extension rods are in place, the reference that was marked
on the
REFLEX EZ-TRAC™ while doing the zeroing has to be aligned
with the mule shoe and the mule shoe sleeve.
If the wedge with the mule shoe sleeve is already in the borehole, the
alignment can be made with the mule shoe slot directed vertically
upwards. With this method however, the results will be slightly less
accurate.
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