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

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Geometrics, Inc
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G-856AX Operation Manual
37
To remove and replace D-cells:
1. Unsnap the clasps and remove instrument cover.
2. Replace batteries to match the polarity markings on the battery holders.
3.
Replace instrument cover. Be sure the cover is seated all the way down in the
case before trying to close the clasps. Do not use the clasps to force the case
into the case as this could cause breakage.
Gel-cell batteries
Their endurance and low magnetic signature make Gel-cell batteries the optimum choice
for use with the G-856AX. The recommended procedure is to operate with the same Gel-
cell battery set for the entire field day and place the partially discharged battery pack on
charge at the end of the day. Overnight charging will insure that it is ready for use the
next day. We recommend alternating operation between the two Gel-cell packs provided
the magnetometer. In this way you are assured that you will always have two completely
charged battery packs at the beginning of each workday.
Each battery pack should provide approximately 200 charge/discharge cycles with
standard field use. Conditions that will reduce battery life include leaving the battery in a
discharged state for long periods or exposure to below-freezing temperatures while in a
deeply discharged state. Leaving them under charge for an extended period cannot
damage the Gel-cell battery packs. When the system is not in use we recommend that its
Gel-cell batteries be put on charge for at least 6 hours once every three months to
preserve their service life.
Proceed as follows to change Gel-cell batteries:
1) Unsnap the side clasps and remove instrument cover.
2) Unplug the power connector from the battery pack. Do this by grasping each of
the connector bodies and pull them apart.
3) Separate the Velcro band that secures the battery to the console chassis and
remove the battery
4) Load the replacement battery in its slot and secure the Velcro band.
5) Reconnect the power connector.
6)
Replace instrument cover taking care that the cover clears the Velcro bands and
the power leads. Be sure the instrument is seated all the way down in the case
before trying to close the side clasps. Do not use the clasps to force the unit into
the case as this could cause breakage.
Lithium battery
In addition to the operating batteries, there is a AA-size lithium battery, called the "keep
alive" battery, used to power the clock and preserve data memory when the operating
batteries are removed. The lithium cell should be changed about every 6 to 10 years. It
is soldered into and underneath the top circuit board. When the time has come to replace