4 Locating
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5. If the unit passes the tests, the following will be displayed. The results are automatically stored with the
equipment and can be reviewed later with the aid of MyvScan management tool.
6. If one or more parts of the test fail the ticks will be replaced by a cross at the relevant position. If this
occurs try the test again in a more noise free environment. If the unit continues to fail the tests, return to
Vivax-Metrotech or one of its approved repair centers for further investigation.
7. Note that this test does not test the Metal cover detector of the vScanM. To check this, simply check that
the unit detects a 6” (150mm) metal cover at a range exceeding 6” (150mm).
4.8.2
vScan Transmitter Check
As the transmitter is not a measuring device, it is not necessary to perform calibration checks on the
equipment. However, it is advisable to perform this quick and easy functionality check.
Method: Induction
1. Set the transmitter down on a wooden chair or table so that it is off the ground. Set it in the orientation as
shown.
2. Switch on the transmitter. Set the Receiver to 33 kHz Sonde mode. Set the sensitivity control so that the
largest notch is pointing directly at the mode switch as below.
3. Slowly alter the distance from the transmitter until the meter just reads full scale. Check the distance from
the transmitter is 1.0 to 1.5m.
Method: Direct Connection
1. Connect the direct connection leads to the transmitter. Switch on the transmitter and set to low output.
Short the two crocodile clips together and note a major change in speaker tone.
2. Switch the output to high and listen for a further drop in tone.
3. If there is no change in tone, check the condition of the direct connection leads and if possible try a
different set of leads. If there is no change still, return to Vivax-Metrotech or one of its approved repair
centers for further investigation.
