Hobart GPU-600 Series User Manual

OM-2244 / Operation and Maintenance Manual
DCS-600/ Series 500082 / Solid State Transformer-Rectifiers
December 15, 2014
Chapter 2-2
Page 6
TEST
STEP
TEST
POINT
TEST
CONDITION
VOLTAGE
MEASUREMENT
TEST
DESCRIPTION
7
TP14
Open circuit: no load
0 VDC ± .01V
Checks for null (0) by R38 for the no
load current signal
8
TP17
---
+ 1.25 ± 10%
Checks voltage slope calibrated with
R102
9
TP19
---
- 5 VDC ± 1%
Checks reference voltage adjusted by
R101
10
TP13
---
- 28.5 VDC ± 1%
Checks output volts set by R109 in 28
VDC mode
TP13
---
- 14.3 VDC ± 1%
Checks output volts set by R110 in 14
VDC mode
11
TP20
---
6 ± .5 VDC
Checks R60 overload current setting
12
TPL
Standard load
Near zero (0.002 V)
Optional test
Checks overload light, DS2, and circuit
functioning (Q10)
TPL
Overload
12 to13 VDC
Table 2 GPU Circuit Board Tests
4) Circuit Board Calibration
Equipment Requirements
Calibration requires the following equipment:
 a load bank – able to pull 2200 amps at 28.5 volts
 two voltmeters - ± 2% accuracy
 an oscilloscope
 a 3.3 k resistor
 small test clips
Also, if your GPU is set up for bridge interlock and remote connection option, you will need to add
switches:
 Connect normally open "Start" switch between TB101-1 and TB101-2.
 Connect normally closed "Stop" switch between TB101-2 and TB101-3.

Hobart GPU-600 Series Specifications

General

Brand	Hobart
Model	GPU-600 Series
Category	Transformer
Language	English