Tektronix THM565 Technical Reference

PS280 and PS283 Performance Verification
8
Handheld and Benchtop Instruments Basic Service
Table 7: Load Resistor Values for Current Checks
de
PS280 PS283
Mo
de
RL1 RL2 RL1 RL2
INDEP 20 , 30 W 2 , 5 W 20 , 30 W 2 , 5 W
PARALLEL 10 , 30 W 1 , 30 W 10 , 30 W 1 , 30 W
The following check verifies the INDEP mode SLAVE current regulation
performance.
1. Set the power supply SLAVE AMPS/VOLTS meter selection switch to
AMPS.
2. Set up the digital multimeter to measure 25 VDC.
3. Connect the digital multimeter to the + and – terminals of the power supply
SLAVE output.
4. Adjust the power supply SLAVE VOLTAGE control until the multimeter
reads 25 VDC.
5. Disconnect the digital multimeter from the power supply.
6. Set the digital multimeter to measure a DC current of at least 1 A (PS280) or
0.5 A (PS283).
7. Connect the digital multimeter and load resistors to the + and – terminals of
the power supply SLAVE output as shown in Figure 2. See Table 7 for the
appropriate load resistor values.
8. Verify that the power supply output current varies less than 0.2%
±3 mA
while shunting load resistor RL1 with the shorting strap. See Figure 2 above.
The following check verifies the PARALLEL mode MASTER current regulation
performance.
1. Set the power supply to the PARALLEL operating mode by engaging both
TRACKING mode switches (both switches in).
2. Set up the digital multimeter to measure 25 VDC.
3. Connect the digital multimeter to the + and – terminals of the power supply
MASTER output.
4. Adjust the power supply MASTER VOLTAGE control until the digital
multimeter reads 25 VDC.
5. Disconnect the digital multimeter from the power supply.
SLAVE Current Regulation
(INDEP Mode)
MASTER Current
Regulation
(PARALLEL Mode)

Tektronix THM565 Specifications

General

Brand	Tektronix
Model	THM565
Category	Multimeter
Language	English