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RE: 2281S behavior starting up directly into CC-mode
Interesting. I think it is related to the starting up into CC mode.
Datasheet does not tell us, but the output capacitance on the power supply is significant.
Slower V/sec slew rate will mean less displacement current.
How are you measuring the current in this setup? Hi side or lo side of the 45Ω resistor?
If your concern is too much current when started up this way, some series R and use of the remote sense lines from rear panel could help. Just mind the max 1V delta V between force and sense.
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RE: Does the 6517B measures pA current by discharging the source
Need you to clarify on connections. Where is the HI and the LO?
Your experiment sounds a little bit like Ion Beam Measurements.
Check out section 4.3.5 in our handbook:
Keithley Low Level Measurements Handbook
You may need to create a bias condition to attract the charge to flow through the amp measure function of the electrometer. -
RE: KITE program displays "KITE has stopped working"
Your reference to KITE tells us you have the older 4200-SCS running on Win7 or earlier.
Evidently some file corruption has occurred.
You could try a reinstall of the KITE environment.
More drastic would be to catch the Acronis restore during boot up. Most of the older 4200 will have an as-shipped image in the Acronis software. Check the manuals on use.
Are you recently using the tool in a new way and encountering this error?
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RE: Keithley DMM6500 - random jump touch issue
Thanks for the videos.
It behaves like the touch panel is receiving touch to change measure function.
Something is wrong in your display.
What happens if you place the instrument on different screen? Swipe to graph or stats screen? Does it stay there?
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RE: Direct current overflow issue in Keithley DMM 6500 digital multimeter
Seems you are saying that the DCI measure function returns overflow for the 3A and lower ranges.
Both front and rear. No connections and still get overflow.
However, the 10A range available on rear only, is somewhat functional.
To me, it sounds like a malfunctioning meter.
Firmware unlikely to help such a symptom.
Separate from DCI is the digitize current measure function. Does that still work for the 3A and lower ranges? -
RE: Voltage compliance issue in picoammeter 6487
If you are seeing the OCOMP indicator when you turn the voltage source on, this means the maximum current (current limit) has been encountered.
If this occurs even for open circuit, I suspect some malfunction in the instrument, or your cabling is not what you think it is.From front panel, you can adjust the amount of current limit.
Both the reference and user manuals detail the procedure.
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RE: Unable to set Source Current for SMU (Four Point Probe Experiment)
See if this application note helps:
Four Point Probe Resistivity with 2450 -
RE: communicate with two keithley via two gpib cables using python
You have two keithleys and two gpib cables.
But how many GPIB interface boards does the computer have?
If only one gpib card in the PC, then only one program can take charge of it at a time.
A single program that sends commands to two different gpib address would be needed for simultaneous use of both keithleys. -
RE: DMM 2701 - Ethernet conection - The web page open but not able to connect to 2701
The model 2701 uses port 1394 for the LAN communication. -
RE: Cannot get 2500 readings per second with Keithley 2700
You can try turning off the display: :DISPLAY:ENABLE:STAT OFF
I found an FAQ on tek.com for this topic. It is indicating that the TRACE buffer is not the fastest one.
Max Reading Rate from 2700, 2701 or 2750
Alternate commands:*RST :SENSE:FUNC 'VOLT:DC' :SENSE:VOLT:NPLC 0.01 :SENSE:VOLT:RANGE 10 :SENSE:VOLT:AVER:STAT OFF :SAMPLE:COUNT 1000 :TRIG:DELAY 0.0 :SYSTEM:AZERO:STAT OFF :DISPLAY:ENABLE:STAT OFF :READ? Now read the data... To check for maximum speed apply a 1V RMS at 2Hz to the input. Run the above command sequence. The 1000 readings should show one complete cycle or less. This shows the meter is taking data at least at a rate of 2000 readings per second.