Geometrics Memory-Mag G-856AX, Руководство по эксплуатации

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Geometrics, Inc
.
G-856AX Operation Manual
38
the lithium cell be sure all survey data in memory has been recorded elsewhere before the
lithium battery is unsoldered from the circuit board. Use the following procedure for its
replacement:
1. Unclip the console cover and slide it off the case.
2. Remove the operating batteries.
3. Remove the four screws holding the circuit boards together. As you separate the
boards, unplug the interconnecting cables noting their positioning as you do so.
Lay the top circuit board down so the battery can be easily removed.
4. Unsolder the battery wires and wipe any debris from the battery area. Then
carefully remove the battery so as not to damage the circuit board.
5. Check the battery polarity and then thread the positive lead of the replacement
battery through the hole marked positive on the circuit board.
6. Measure the current drain form the battery if possible. Drain should not exceed
30 micro Amps. If the drain exceeds 30 micro Amps, the console should be
repaired before being placed back in service.
WARNING : Shorting the lithium
battery will blow an internal battery fuse and could result in over heating and
possible explosion.
Be sure the battery lead wires do not meet .
7. Thread the negative lead of the battery through the hole marked negative.
8. Turn the board over and solder the lead wires to the pads. Trim off any extra
wire. Connection is made with wires running through the center of the board.
9.
Replace the circuit boards, cables, screws and cover.
10.
Install the operating batteries. The clock will have to be reset after the battery is
in place.
Sensor Fluid
The sensor contains coils of insulated wire and for optimum operation these coils must be
submerged in a proton-rich fluid. The following section provides information about this
fluid and the correct procedure for filling the sensor with fluid.
It is important that you DO NOT operate the sensor for an extended period without
fluid as this can damage the sensor.
The sensor should be filled so that the fluid level is
about 1cm below the fill port. Correct fluid level can be checked approximately by
shaking the sensor and judging the fluid level by the degree of sloshing. A more accurate
level check requires removal of the sensor’s fill plug and visual inspection of the
contents. If the sensor is empty or needs filling proceed as follows:
1. Place the sensor on a flat, level surface.
2. Remove the blue cap plug on the sensor. Observe that the fill-port is a threaded
tube extending into the sensor vessel. This design provides a 1cm air gap that
allows for thermal expansion of the sensor fluid.
3. Fill with acceptable sensor fluid to within 1 cm. from the top. Acceptable Fluids
for Proton Magnetometers include:

Shell SOL-71 (Shell Oil Co. product) Note:. This is the preferred fluid .

Charcoal Lighter Fluid (Kingsford, Wizard, etc.)