TI5100 GPU-24
16
3
Operating Procedures
Figure 3.11.3 Starting vehicle with TI5100 GPU-24
3.12 – Operating with a Digital Volt/Amp Meter
The DVAM (Digital Volt/Amp Meter) 3100A provides measurements for all voltage ranges and amperage
draws between zero and 2,000. The DVAM 3100A indicates the aircraft or vehicle’s current demand.
Integrated with the Tesla™ GPU power supply, the DVAM is a valuable tool for troubleshooting and
system checks.
The left meter indicates dc voltage output and the right meter
indicates amperage draw. The meter’s range changes from
0-200 amps to 0-2,000 AMPS with the flip of a switch. The 200
amp setting provides a more detailed reading extending to two
decimal places. The 2,000 amp setting reads higher currents
such as engine starts and in rush currents.
Figure 3.12.1 DVAM 3100A
High Power Demand
High power demand is defined by a requirement of more than 100 amps. Connect to aircraft ground power
receptacle. DC bus power should come on and aircraft voltmeter should indicate 27.5 Vdc to 23.5 Vdc (23
Vdc minimum). If current demand is above 100 amps, converter output voltage will drop below 28.5 Vdc and
two or more LED status indicator bars will illuminate. If the red LED status is displayed, the unit has dropped
down to 24.5 Vdc.
NOTE
!
When all LED status indicator bars illuminate, both the converter and
power cells are supplying 24 Vdc power output for current demands
above 100 amps.
Removing DC Power Supply From Aircraft or Vehicle
Remove dc power cable GPU connector from vehicle.
1.
Remove dc power cable connector from TI5100 GPU-24 (if necessary).
2.
Reinstall dc Receptacle’s Protective Cover.
3.
Engine Starting
Prior to engine start, ensure power cell charge is sufficient to provide an efficient engine start. Check dc
power cable for secure and correct installation prior to engine starting. Follow ground power engine starting
procedure as specified in vehicle operator’s manual.
CAUTION
!
Unplug AC power cord before starting engine with unit.