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3 - Turn-On Checkout
34
Procedure Display Explanation
10. Press
Shift, and
Current
CURR:LEV 5 Indicates the default output current limit setting.
11.
Press
. 5 Enter
CURR:LEV .5
Sets the current limit to .5 amperes. The CC
annunciator is on, indicating that the unit is in
current limit mode and the light bulbs are dimmer
because the output voltage has dropped in its
attempt to limit output current.
12. Press
Protect, scroll to
the CURR:PROT item,
and press ° to select
ON. Then press
Enter.
CURR:PROT ON You have enabled the overcurrent protection
circuit. The circuit then tripped because of the
output short. The CC annunciator turns off and
the OCP and Prot annuciators come on. The
output current is near zero.
13. Press Output On/Off 0.5 V 60 Hz
The output is off and the Dis annunciator turns on.
14. Press
Protect, scroll to
the CURR:PROT item,
press ° to select OFF,
then press
Enter.
CURR:PROT OFF You have disabled the overcurrent protection
circuit. The Prot annunciator turns off.
15. Turn the unit off. The next time the unit turns on it will be restored
to the *RST or factory default state
In Case of Trouble
Error Messages
Ac source failure may occur during power-on selftest or during operation. In either case, the display may
show an error message that indicates the reason for the failure.
Selftest Errors
Pressing the
Shift and Error keys will show the error number. Selftest error messages appear as:
ERROR <n>, where "n" is a number listed in the following table. If this occurs, turn the power off and
then back on to see if the error persists. If the error message persists, the ac source requires service.
Table 3-1. Power-On Selftest Errors
Error No. Failed Test
Error 0 No error
Error 1 Non-volatile RAM RD0 section checksum failed
Error 2 Non-volatile RAM CONFIG section checksum failed
Error 3 Non-volatile RAM CAL section checksum failed
Error 4 Non-volatile RAM WAVEFORM section checksum failed
Error 5 Non-volatile RAM STATE section checksum failed
Error 6 Non-volatile RAM LIST section checksum failed
Error 10 RAM selftest
Error 11 to 18 DAC selftest 1 to 8