Tektronix PS280 - Performance Tests; Constant Current Load Regulation; Constant Current Test Setup

WMMPXfXlftnnr Performance Tests
Constant Current
Load Regulation
Equipment Required: Digital multimeter and load resistors
•*-i
RL1
Figure 4-1: Constant Current Test Setup
1. Check the Master current regulation (INDEPendent mode):
a. Set up the equipment:
• Disengage both TRACKING mode switches (both switches out) so
that the power supply is in the INDEPendent operating mode.
• Set the Master AMPS/VOLTS meter selection switch to AMPS.
• Set the digital multimeter to measure a DC voltage of + 25 volts.
• Connect the digital multimeter to the + and - terminals of the
MASTER output.
• Set the Laboratory DC Power Supply MASTER VOLTAGE control
until the multimeter reads +25 V.
• Disconnect the multimeter from the power supply.
• Set the digital multimeter to measure a DC current of at least 1
amp (PS280) or 0.5 amps (PS283).
• Connect the multimeter, load resistors, and test switch to the
+ and - terminals of the Master output as indicated in Figure 4-1.
See Table 4-2 for the appropriate values of the load resistors.
PS280 & PS283 Laboratory DC Power Supply Module-Level Service Manual
REV AUG 1991