![](/images/new-backgrounds/1104415/104415105x1.webp)
Checking the Voltage Function
The tests in Table
Table
| 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 |
| Voltage decreases several millivolts each time you press the key.* | |
times |
|
|
|
|
Press | the same |
| Voltage increases several millivolts each time you press the key.* | |
number of times |
|
|
| |
|
|
|
|
|
*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 |
| Control operates similarly to | and | keys. The control | |
counterclockwise and then |
| is rate sensitive. Turning it more quickly causes a more rapid change in | |||
clockwise |
|
| 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. |
|
|