OPERATION MANUAL - Scintrex

Selecting Base StationsRepeated gravity measurements at a base station can be used to determine theresidual drift. In any survey area, try to select base stations that:• are easily accessible to the other stations to be surveyed (e.g. perhaps nearthe centre of the survey area)• have low vibration noise (e.g. away from industrial, vehicular or naturalvibration sources such as rivers, beaches, volcanoes, etc.)• have a hard, level surface where the precise tripod location may be repeated,and the level of the gravity meter maintained.Operating in Cold WeatherIn extremely cold weather (e.g. well below 0°C), the battery life will bereduced because of:• increased battery drain required to maintain the temperature of the sensorand to heat the display• reduced capacity of the battery because the battery becomes coldAn external battery belt and extender cable (optional) can reduce the effect ofa cold battery as the external battery is kept warm by the heat of the operator.For more information, see “Using the Battery and Power Adapter” onpage 5-1.Note:If desired, the external battery may be disconnectedbefore measurement only so that there will be nointerconnecting cable during measurement time.Using the CG-5 Before Warm-Up Stabilization isCompleteAfter the CG-5 has been powered down for more than 2 days, it isrecommended that the unit go through a warm-up period of 48 hoursfollowed by the drift correction period which takes another 12 hours. In somesituations, it may not be possible to wait this long before a survey is started.Operations4-5CG-5 Manual - part # 867700 Revision 2