How is the web based control on the keysight?
Also did you find the logging feature any useful ? Does it do any sort of averaging or is it instantaneous? Also what is the min time step/offset?
I used Keysight's software only briefly, but it worked very well.
To me the interface of the power supply itself is quite good, so I didn't see the need to invest in the software.
The logging is very useful to me and I used to capture battery charge curves. I don't recall averaging being implemented in the supply. It can save all data in .csv format to a pendrive, so Excel or other spreadsheet software can manipulate data quite nicely.
The sample interval goes from 200ms to 60s and the supply nicely calculates the time duration depending on the sample interval, the different collection of logged information per channel (P, V, A) and the memory available.
Also did you find the logging feature any useful ?
I did some "tricks" using the advanced features:
http://wunderkis.de/E36312A/index.html
Anyway, for regular use these features are too cumbersome (at least to me).
Does it do any sort of averaging or is it instantaneous? Also what is the min time step/offset?
Can't tell anymore, guess you'll have to read the manual
Nice tricks on emulating a load, but it indeed take too much work
How is the web based control on the keysight?
Also did you find the logging feature any useful ? Does it do any sort of averaging or is it instantaneous? Also what is the min time step/offset?
I used Keysight's software only briefly, but it worked very well.
To me the interface of the power supply itself is quite good, so I didn't see the need to invest in the software.
The logging is very useful to me and I used to capture battery charge curves. I don't recall averaging being implemented in the supply. It can save all data in .csv format to a pendrive, so Excel or other spreadsheet software can manipulate data quite nicely.
The sample interval goes from 200ms to 60s and the supply nicely calculates the time duration depending on the sample interval, the different collection of logged information per channel (P, V, A) and the memory available.
Thanks for the info . I guess measurements/log performed right on the instrument are more accurate (in time/timestamps) than reading back through lan/pyvisa etc. since they avoid the command overhead and jitter. Although 200ms is not too fast. Have you found this restrictive?
It is restrictive if I want to log fast current transients, but for that I have an oscilloscope.
I simply live with the fact this is a pretty good power supply with a built-in 5Hz DSO - plenty for what I use.
Hi, is the (transformer?) hum normal? It appears as soon as the device gets plugged in.
Hi, is the (transformer?) hum normal? It appears as soon as the device gets plugged in.
My unit also likes to hum.
It is certainly part of the advanced pre-heating circuit that keeps the backlight always on
(My only real pet peeve with this otherwise marvelous bit of kit)
Mine is always silent except if I run a heat gun on the same circuit. I get the same buzz/hum on some other HPAK supplies as well with the heat gun.
It doesn't just hum when plugged in, it draws about 10W on standby. It really does need a proper physical power switch.
Have 12A, ch2 and ch3 can track with each other, but can't figure out how to configure dual channel with +/- output.
Have 12A, ch2 and ch3 can track with each other, but can't figure out how to configure dual channel with +/- output.
Connect - and + from ch2 and ch3 and use that as the 0V point.
Have 12A, ch2 and ch3 can track with each other, but can't figure out how to configure dual channel with +/- output.
Connect - and + from ch2 and ch3 and use that as the 0V point.
Also, did you set the output mode to "Series"?
Have 12A, ch2 and ch3 can track with each other, but can't figure out how to configure dual channel with +/- output.
Connect - and + from ch2 and ch3 and use that as the 0V point.
Also, did you set the output mode to "Series"?
You best use tracking mode for +/- voltage out so you can see the exact voltage. Series mode is likely the same but you'd have to divide the reading by two mentally.
Thanks for the input!
The "tracking" tracks voltage but not for current
So I put a shorting bar between ch2- and ch3+ and program the 2 chs with keypad under independent mode, now it serves as a +/- supply for some sensor
Mod.:
It would be possible to turn on ch2 and ch3 simultaneously with remote command "OUTP ON,(@2,3)" per user's manual.
Can you point me to some reference for [lab] power supplies without output capacitors?
Can you point me to some reference for [lab] power supplies without output capacitors?
I'd look at high-speed power supplies (e.g.
Kepco BOP) or for low current, a source measure unit. I can't find any hard data, but I'd think battery simulators (like
Keithley 2300 series or
Keithley 2281S, or the various
Keysight offerings) would also have a pretty low output capacitance due to their sensitive current measurement and high current measurement bandwidth. R&S also has some models that can do this, but I don't know the models from the top of my head.
Designing a power supply without capacitance to be stable across reactive loads is tricky. That's why you'll see guidance about connecting inductive loads in most of their manuals. For example Kepco has models specifically compensated for capacitive or inductive load because the standard model doesn't do so well. The battery simulators will tell you to minimize lead inductance between power supply and DUT. That's why most general-purpose power supplies will have some amount of output capacitance.
Can you point me to some reference for [lab] power supplies without output capacitors?
For what purpose? If you are afraid about damaging a load when you connect it: you are using a PSU wrong. Disable the output and then connect the load. For most purposes, a capacitor-less PSU will bring more problems that it solves.