Products > Test Equipment
Lab Power Supply Turn ON and OFF Characteristics
mahi:
Rohde & Schwarz HMP4040 (pre-facelift): 4-channel power supply with 32V/10A (up to 160W per channel, 384W total) - datasheet
Measurements with voltage set to 8V, current to 40mA and a resistor of 50 ohm.
Switch on:
#1 HMP4040 CH1 switch on - 1V/div - 50ms/div (*)
#2 HMP4040 CH1 switch on - 1V/div - 5ms/div (*) (**)
(*) I had to take 1V/div instead of 500mV/div because of the overshoot
(**) Due to the duration of the overshoot, it did not make sense to go shorter than 5ms/div, so no 100µs/div screenshot included
In CC mode I'm measuring 39.75mA with a recently calibrated Fluke 289 (average because it actually fluctuates between 39.6 and 39.9mA) while the HMP4040 indicates 39.9 .. 40.1mA.
Peak detect on the Fluke 289 measures 155.9mA at switch-on which is very close to what we can see in the oscilloscope measurements.
(the multimeter was not in-circuit during the oscilloscope measurements)
Switch off:
#3 HMP4040 CH1 switch off - 500mV/div - 50ms/div
#4 HMP4040 CH1 switch off - 500mV/div - 100µs/div
I did not see differences in behavior between the channels, so I've included screenshots of channel 1 only.
Furna:
--- Quote from: mahi on October 06, 2024, 07:10:34 pm ---Rohde & Schwarz HMP4040 (pre-facelift): 4-channel power supply with 32V/10A (up to 160W per channel, 384W total) - datasheet
[...]
--- End quote ---
Looking at the datasheet I realized this PSU has also sense wires; did you try using sense?
mk_:
--- Quote from: Furna on October 06, 2024, 08:19:11 pm ---
--- Quote from: mahi on October 06, 2024, 07:10:34 pm ---Rohde & Schwarz HMP4040 (pre-facelift): 4-channel power supply with 32V/10A (up to 160W per channel, 384W total) - datasheet
[...]
--- End quote ---
Looking at the datasheet I realized this PSU has also sense wires; did you try using sense?
--- End quote ---
for CC-testing?
sonpul:
RIDEN RD6006P
Siglent SDS1202X-E 50ohm resistor.
Furna:
--- Quote from: mk_ on October 06, 2024, 08:38:24 pm ---
--- Quote from: Furna on October 06, 2024, 08:19:11 pm ---
--- Quote from: mahi on October 06, 2024, 07:10:34 pm ---Rohde & Schwarz HMP4040 (pre-facelift): 4-channel power supply with 32V/10A (up to 160W per channel, 384W total) - datasheet
[...]
--- End quote ---
Looking at the datasheet I realized this PSU has also sense wires; did you try using sense?
--- End quote ---
for CC-testing?
--- End quote ---
In the analog world it doesn't make any sense I know ... but in digital/software world it might.
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