Leaders in Pipeline Survey Systems
OPERATOR’S MANUAL
Issue 4.04 - 1207 5
2.2.3. Charging the Detector Unit (DU)
The DU can be powered by C cells or D cells depending on the model. The picture below shows
the two types.
The DU can be powered either by re-chargeable NiCad, NiMH batteries OR by alkaline
batteries. Only the NiCad / NiMH batteries can be charged using the following procedure.
Using the charger with alkaline batteries installed in the DU will result in damage to the unit.
There are three charging procedures:
(a) for charging NiCd / NiMH batteries that are not
completely exhausted (flat) DU off.
(b) for charging NiCd / NiMH batteries that are not
completely exhausted (flat) DU on.
(c) for charging completely exhausted (flat)
NiCad / NiMH batteries
The NiCad / NiMH batteries are completely exhausted (flat) when the DU display does not
activate after the I/O button on the display panel is pressed with the batteries installed.
There are two controls for the power supply to the DU:
1. The MAIN POWER switch (located in the battery compartment and normally left ON – see
Fig. 1a/b above.
2. For normal operational use the DU is switched ON and OFF by pressing the button marked
I/O on the DU display panel / control keypad.
Fig. 1b – Main Power Switch
D Cells
D Cells
4.5Ahr NiCd
On/Off Switch
C Cells
4.5Ah NiMH
On/Off Switch
Fig. 1a – Main Power Switch
C Cells
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