Circuit Board Calibration - Hobart 6T28-600CL Operation And Maintenance Manual

OM-2244 / Operation and Maintenance Manual
DCS-600/ Series 500082 / Solid State Transformer-Rectifiers
TEST TEST
STEP POINT CONDITION
7 TP14 Open circuit: no load
8 TP17
9 TP19
TP13
10
TP13
11 TP20
TPL Standard load
12
TPL

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.
December 15, 2014
TEST
MEASUREMENT
---
---
---
---
---
Near zero (0.002 V)
Overload
Table 2 GPU Circuit Board Tests
VOLTAGE
0 VDC ± .01V
+ 1.25 ± 10%
- 5 VDC ± 1%
- 28.5 VDC ± 1%
- 14.3 VDC ± 1%
6 ± .5 VDC
12 to13 VDC
TEST
DESCRIPTION
Checks for null (0) by R38 for the no
load current signal
Checks voltage slope calibrated with
R102
Checks reference voltage adjusted by
R101
Checks output volts set by R109 in 28
VDC mode
Checks output volts set by R110 in 14
VDC mode
Checks R60 overload current setting
Optional test
Checks overload light, DS2, and circuit
functioning (Q10)
Chapter 2-2
Page 6