Filter
Top Products
Turn-On Checkout 51
Checking the Voltage Function (All Models)
The tests in Table 3-1 check the basic voltage functions with no load connected to the power supply. The VOLTS display
will show various readings. Ignore the AMPS display.
Table 3-1. Checking the Voltage Functions (Output Terminals Open)
Procedure Display Explanation
Output Terminals Open or Connected to a Voltmeter
If Dis is on, turn it off by pressing
Press key VOLT 0.000
Default voltage setting. CV annunciator should be on. (If CC annunicator
is on, increase the current by pressing
one or more times until
CC turns off and CV turns on.)
Press
VOLT 4 Program output to 4 volts.
Press 4.000 Enter the voltage. Meter mode displays output voltage. During these
tests, there may be a small (relative to full output) AMPS reading that
will be ignored.
Press several
times
Voltage decreases several millivolts each time you press the key.*
Press the same
number of times
Voltage increases several millivolts each time you press the key.*
* The number of millivolts change is determined by the voltage programming resolution of
your power supply (see "Supplemental Characteristics" in Chapter 1).
Rotate Voltage control first
counterclockwise and then
clockwise
Control operates similarly to
and keys. The control
is rate sensitive. Turning it more quickly causes a more rapid change in
voltage.
Press 4.000 Program output to 4 volts.
Press
Display shows default OVP (overvoltage protection) trip voltage for your
supply (see "Supplemental Characteristics" in Chapter 1).
Press OV 3 Program the OVP to 3 volts, which is less than the output voltage.
Press 0.000 OVP voltage entered is less than the output voltage. This causes the OVP
circuit to trip. The output drops to zero, CV turns off, and Prot turns on.
Press
OV - - - - - Shows that the power supply shuts down because the OVP circuit has
tripped.
Press Return display to meter mode (optional step).
Press
0.000 Program the OVP to 4.5 volts, which is greater than the output voltage.
Note: You cannot clear an OVP trip until you have first removed the
cause of the condition.
Press Prot Clear
(
)*
4.000
The OVP circuit is cleared, restoring the output. Prot turns off and CV
turns on.
* is the unlabeled blue key.