Operation; Powering The Supply; Switching The Power Supply On And Self-Test Information; Using The Control Knobs - Extech Instruments DPC42 User Manual

5. Operation
Note: The DCP42 Total Output Voltage Range is 42VDC and the Total Rated Current is 0 to 10ADC
5.1 Powering the Supply
Check the rating label of the power supply and ensure that it complies with the AC mains voltage
that is to be used. Connect the power supply to the AC Mains using the provided power cord.
5.2 Switching the Power Supply ON and Self‐Test Information
The power supply will perform a series of self‐tests when it is switched ON. The LED and other
indicators on the front panel will illuminate in sequence. When the cooling fan is being checked,
a high speed wind sound can be heard. After the self‐tests, the CV, V and A LED indicators are lit
and the unit displays voltage and 0.0 current. To find the CC current level, turn the current
control knob one click in either direction. The current display returns to 0.0 after a few seconds.
5.3 Using the Control knobs
The rotary encoder control knobs have fine and coarse tuning with 'clicking' movement. Push
the knobs to toggle between coarse and fine tuning, notice the subtle changes in brightness of
the related LED. Adjust the knobs to the desired values by using coarse and then fine tuning.
The display will resume its normal brightness after few seconds to confirm an adjustment.
5.4 Connecting the Power Supply and running a Test
1.
Connect the equipment under test to the power supply. Red (+) is connected to the positive
polarity input of the equipment and Black (‐) is connected to the negative polarity input of
the equipment.
2.
Switch ON the power supply first; the panel meter & green CV Indicator should illuminate.
3.
Next, switch ON the equipment under test; the panel meter & green CV Indicator should
remain lit in green.
4.
Testing can now begin.
5.
When finished, switch OFF the equipment under test first and then switch off the power
supply.
5.5 Keypad Lockout function
1.
Press LOCK/UNLOCK to lock or unlock all of the function buttons and control knobs on the
front panel.
2.
The LOCK/UNLOCK button light switches ON when the push‐buttons are locked.
5.6 Manual Output ON/OFF
1.
Press OUTPUT ON/OFF button to manually set the output ON or OFF.
2.
The OUTPUT ON/OFF button light switches ON when the output is ON.
5.7 Ammeter/Wattmeter Selection
1.
With the output ON and all presets OFF, press SHIFT and then press PRESET.
2.
Press the SHIFT button again and then press the LOCK/UNLOCK button to change from
Ammeter mode to Wattmeter mode.
3.
To change back to Ammeter mode from Wattmeter mode, press the SHIFT button and then
press the LOCK/UNLOCK button.
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