Operating With A Digital Volt/Amp Meter - Tesla TI4200 GPU-24 User Manual

3
Operating Procedures
High Power Demand
High power demand is defined by a requirement of more than 200 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 200 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
!
Engine Starting
CAUTION
!
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.
Removing DC Power Supply From Aircraft or
Vehicle
1. Remove dc power cable GPU connector from
vehicle.
2. Remove dc power cable connector from TI4200
GPU-24 (if necessary).
Reinstall dc receptacle's protective cover.
3.
3.12 – Operating with a Digital Volt/Amp Meter
The DVAM (Digital
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.
The DVAM Interface Receptacle is located towards the bottom of the
front panel next to the ac circuit breaker.
16
When all LED status indicator bars illuminate, both the converter and
power cells are supplying 24 Vdc power output for current demands
above 200 amps.
Unplug AC power cord before starting engine with unit.
Volt/Amp Meter) 3100A
Figure 3.11.3 Starting vehicle with TI4200 GPU-24
provides
Figure 3.12.1 DVAM 3100A
Figure 3.12.2 DVAM Interface
Receptacle
TI4200 GPU-24