User Manual California Instruments
118 CSW Series
6. Service
6.1 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.
6.2 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.
6.3 Basic operation
PARAGRAPH PROBLEM
7.3.1 Excessive Output Voltage
7.3.2 Poor Output Voltage Regulation
7.3.3 Overload Light On
7.3.4 Distorted Output
7.3.5 Unit Shuts Down After 1-2 Seconds
7.3.6 No Output and no lights on front panel
7.3.7 No output, but front panel controller is active.
Table 6-1: Basic Symptoms
6.3.1 Excessive Output Voltage
CAUSE SOLUTION
External sense not connected(If used) Connect external sense wires from TB3 on
rear panel to the AC power outlet TB2
Voltage on Output Terminal Block is
higher than that on Sense Terminal Block
If the External Sense is connected to the
load the voltage output on TB2 will be
higher when the output is loaded
If the voltage is measured with an External
DVM from Line to Line it will be higher
than the programmed voltage
Connect the External DVM from Line to
Neutral on the Output Sense Terminal
Block, TB3) for the correct voltage.
6.3.2 Poor Output Voltage Regulation
CAUSE SOLUTION
Unit is overloaded Remove overload
Unit is programmed to wrong voltage
range.
Select correct voltage range.
Input line has fallen below spec. limit. Check input supply voltage.
Output Sense lines not connected to load Connect Output Sense (TB3) to the load.
To Next Page
Loading...
