MGC Pump User’s Manual
UM-MGC-P v1.06 12 of 19
DETECTOR MAINTENANCE
Applying Gas from a Gas Cylinder
The detector contains an internal pump that is continually drawing in gas through the gas inlet. The best way to
apply gas from a cylinder is through the use of a demand ow (vacuum-actuated) regulator. This type of regulator
will supply the exact amount of gas that the detector is drawing with the pump. Alternatively, a pressure-based
regulator rated for at least 300 ml/min can be used. In that case, a T (or Y) tting should be placed between the
regulator and the detector to vent the excess gas that exceeds the ow rate being sampled by the detector’s
pump.
Battery
The battery is displayed as both a percentage and a 3-bar battery icon. The percentage calculation is approximate
and can be used to provide a rough estimation of the time remaining.
When the detector determines that only 20 minutes of run time remains, it will beep, ash and display “LOW BAT”
on the screen. This will repeat with 10 minutes remaining, and then continuously for the last 5 minutes of run time.
When the battery has expired, the detector will give 5 long beeps and ashes, display “OFF” and then shut down.
To charge the detector, either plug it into an AC outlet using the provided charging adapter. You may also charge
the MGC Pump using an MGC Vehicle Charger or MGC Multi Charger. Both are authorized GCT MGC Pump optional
accessories. The detector will cycle the battery icons in a charging fashion until the battery is fully charged. It is
advisable to turn the detector o before charging.
DO NOT charge the instrument in a combustible atmosphere.
DO NOT charge the instrument in temperatures above or below the specied range of 0°C to 40°C.
DO NOT substitute any other battery type than specied and supplied by GCT.
DO NOT use any charger other than that supplied or oered by GCT.
Storage
Store the detector in a safe, dry place between 32°F and 77°F (0°C - 25°C). For longer storage, the detector battery
should be discharged to about 40%. After storage, charge the battery and verify the detector calibration before
use.
Review the warranty period and the “Activate before…” date that is printed on the product box label.
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