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User Manual – Rev J
7. Service
7.1
Cleaning
The exterior of the power source may be cleaned with a cloth dampened with a mild detergent
and wrung out. Disconnect mains power to the source before cleaning. Do not spray water or
other cleaning agents directly on the power source.
7.2
General
This section describes the suggested maintenance and troubleshooting procedures. The
troubleshooting procedure is divided into two sections. The first section deals with basic
operation and connection of the equipment. The second section requires opening the unit and
using LED indicators and a simple multimeter to troubleshoot the unit down to the module level.
Only a qualified electronic technician should attempt this level troubleshooting.
7.3
Basic operation
PARAGRAPH
7.3.1
7.3.2
7.3.3
7.3.4
7.3.5
7.3.6
7.3.7
7.3.1
Excessive Output Voltage
CAUSE
External sense not connected(If used)
Output Open
7.3.2
Poor Output Current Regulation
CAUSE
Unit is overloaded
Input line has fallen below spec. limit.
California Instruments
Table 7-1: Basic Symptoms
PROBLEM
Excessive Output Current
Poor Output Voltage Regulation
Overload Light On
Distorted Output
Unit Shuts Down After 1-2 Seconds
No Output and no lights on front panel
No output, but front panel controller is active.
SOLUTION
If external sense mode is selected, make
sure the external sense wires on the rear
panel are connected to the AC power
outputs either at TB1 on the AC source or
at the load.
If no load is present and a current is
programmed, the compiance voltage will
exceed the maximum. Short the output or
apply a load < 12 Ohm.
SOLUTION
Remove overload
Check input supply voltage.
CS Series
97
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