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Turn-On Checkout - 4
33
Procedure Display Explanation
6. Press 5, Enter VOLT:PROT 5
0.449V 0.145A
Programs the OVP to 5 volts, which is less than
the previously set output voltage.
Because the OVP voltage entered was less than
the output voltage, the OVP circuit tripped. The
output dropped to zero, CV turned off, and Prot
turned on.
7. Press Shift, OV,
<2, 2>, Enter
VOLT:PROT <22> Programs the OVP to a value greater than the
output voltage setting of the unit. This prevents
the OV circuit from tripping again when the
protection condition is cleared.
8. Press Shift, Prot Clear <20.003V>
0.0034A
Clears the protection condition, thus restoring
the output of the unit. Prot turns off and CV
turns on.
9. Press Output on/off Turn the output off.
10. Connect a jumper wire
across the + and - output
terminals.
Shorts the output of the unit.
11. Press Output on/off. 0.0005V
<0.5005>A
The CC annunciator is on, indicating that the
unit is in constant current mode. The unit is
sourcing output current at 10% of the maximum
rating (the default output current limit setting).
12. Press Current, <5>,
Enter.
0.0452V
<5.002>A
Programs the output current to the selected
amperes.
13. Press Shift, OCP 0.0005V 0.0003A You enabled the overcurrent protection circuit.
The circuit then tripped because the unit was
operating in constant current mode. The CC
annunciator turns off and the OCP and Prot
annunciators come on.
14. Press Shift, OCP 0.0005V 0.0003A You have disabled the overcurrent protection
circuit. The OCP annunciator turns off.
15. Press Shift, Prot Clear 0.0452V
<5.002A>
Restores the output. The Prot annunciator turns
off. CC is on.
16. Turn the unit off and
remove the shorting wire
from the output terminals.
The next time the unit turns on it will be
restored to the *RST or factory default state.