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Search found 396 matches

by brian.d.smith
July 6th, 2018, 10:45 am
Forum: 4200-SCS Semiconductor Parameter Analyzer
Topic: Generating 2 set pulses followed sequentially by 2 reset pulses
Replies: 2
Views: 6838

Re: Generating 2 set pulses followed sequentially by 2 reset pulses

Look in the Reference Manual for the SEGARB section. The are Interactive Test Modules available to use SEGARB.
by brian.d.smith
July 6th, 2018, 10:43 am
Forum: 2600 Series SourceMeter
Topic: 2602B not executing commands and randomly working on REM
Replies: 3
Views: 8234

Re: 2602B not executing commands and randomly working on REM

Problem is solved. When connecting to TSB without instrument being on REM, connection is established immediately. Manual seems outdated, because referring to it, instrument needs to be set on REM before connecting to computer. I have never had the need to do that with any 26XXB instrument. The REM ...
by brian.d.smith
July 6th, 2018, 5:13 am
Forum: 4200-SCS Semiconductor Parameter Analyzer
Topic: KCON error when connecting RPM1 or RPM2 to PMU CARD
Replies: 6
Views: 12329

Re: KCON error when connecting RPM1 or RPM2 to PMU CARD

For each channel, the center conductor is HI and the shield is LO. The LO is the return path for each channel. The SMA to SSMC cable breaks out the LO and feeds it to the center conductor of the SSMC cable with the black wire. You can verify this with a DMM. If you are requiring only one two-wire co...
by brian.d.smith
July 6th, 2018, 4:27 am
Forum: 4200-SCS Semiconductor Parameter Analyzer
Topic: 4200SCS couldnt boot and beeping sound coming from SMU card
Replies: 1
Views: 5197

Re: 4200SCS couldnt boot and beeping sound coming from SMU card

Are there any messages from the motherboard ROM? Specifically, is there an ACRONIS message to hit a function key?
by brian.d.smith
July 5th, 2018, 7:01 am
Forum: 2600 Series SourceMeter
Topic: Check if SMU is Busy Sweeping
Replies: 2
Views: 7056

Re: Check if SMU is Busy Sweeping

From the Reference Manual page 3-30

To start a sweep, use the smuX.trigger.initiate() function. Sweeps are overlapped
operations, so you can use the waitcomplete() function as a way to suspend further operation
until the sweep is complete.
by brian.d.smith
July 5th, 2018, 6:47 am
Forum: Solar Cell Measurements
Topic: IV curve of reference solar cell
Replies: 2
Views: 8043

Re: IV curve of reference solar cell

I would start by testing the solar cell with a DMM for 1. Open circuit voltage under full sunlight 2. Short circuit current under full sunlight Use the DMM INPUT HI and INPUT LO for the open circuit voltage test. Use the DMM AMPS input and INPUT LO for the short circuit current test. Perform those t...
by brian.d.smith
July 5th, 2018, 6:31 am
Forum: General Discussion
Topic: Keithley 220 Voltage limit?
Replies: 1
Views: 6976

Re: Keithley 220 Voltage limit?

Maybe you are shorting and/or loading the GUARD? The datasheet says that total (output + guard) current cannot exceed 105mA. Make sure that you use an adapter that drops guard and does not short guard to LO/SHIELD. You must use an appropriate triax adapter at the rear of the instrument. Using a BNC ...
by brian.d.smith
July 5th, 2018, 6:18 am
Forum: Electrometers
Topic: 6517B+VSource with a text fixture WITHOUT guard electrode. How?
Replies: 1
Views: 9614

Re: 6517B+VSource with a text fixture WITHOUT guard electrode. How?

Page 3-4 and 3-5 of the 6517B Reference Manual have what you need to know. You must make sure that the CONFIGURE V-SOURCE feature is configured so that V-SOURCE LO is connected to AMMETER LO internally. Test this configuration using a resistor and some safe low voltage below 40V. Page_3-4.jpg Page_3...
by brian.d.smith
July 5th, 2018, 6:03 am
Forum: 4200-SCS Semiconductor Parameter Analyzer
Topic: KCON error when connecting RPM1 or RPM2 to PMU CARD
Replies: 6
Views: 12329

Re: KCON error when connecting RPM1 or RPM2 to PMU CARD

Yes. KCON must discover all of the hardware you want to use and verify that it is connected and working properly.
by brian.d.smith
July 5th, 2018, 4:28 am
Forum: 2600 Series SourceMeter
Topic: 2602B not executing commands and randomly working on REM
Replies: 3
Views: 8234

Re: 2602B not executing commands and randomly working on REM

My guess is that this is a Windows USB driver issue. In our rack and stack systems with multiple 26xxB instruments, we use GPIB to the master and LAN cables from the master to all of the slaves. It costs more to communicate this way. USB cables are inexpensive. There is a reason that systems that ha...
by brian.d.smith
July 5th, 2018, 4:22 am
Forum: Series 2280 Precision Measurement DC Power Supplies
Topic: Battery Model for PR44 Zinc-Air battery
Replies: 1
Views: 5520

Re: Battery Model for PR44 Zinc-Air battery

Get in touch with your local Tektronix account manager. He/she can get you a loaner 2450 for two weeks and that should allow you sufficient time to characterize your battery.
by brian.d.smith
July 5th, 2018, 4:20 am
Forum: 4200-SCS Semiconductor Parameter Analyzer
Topic: KCON error when connecting RPM1 or RPM2 to PMU CARD
Replies: 6
Views: 12329

Re: KCON error when connecting RPM1 or RPM2 to PMU CARD

The cure for this problem in KCON is to run the utility "Update RMPs and Preamps". Then save. Then run the utility "Validate configuration". The failure should go away and you see a successful validation.
by brian.d.smith
October 21st, 2017, 11:03 am
Forum: 4200-SCS Semiconductor Parameter Analyzer
Topic: Configuration error 4200-SCS
Replies: 2
Views: 10499

Re: Configuration error 4200-SCS

You need a Keithley applications engineer to visit and run a field upgrade application to set your KCON.

I have had to do this at two customer sites over the period of a few years. Not often but it does come up.
by brian.d.smith
June 20th, 2017, 6:22 am
Forum: 2600 Series SourceMeter
Topic: large fall time in high voltage pulses
Replies: 7
Views: 25302

Re: large fall time in high voltage pulses

I would try using TSP Express to create the pulse and have a look with the oscilloscope. Leave the DUT unconnected to see the instrument response open circuit.
by brian.d.smith
May 26th, 2017, 6:09 am
Forum: 2400 Series SourceMeter
Topic: Issues faced in measure voltage/source current mode when range is changed
Replies: 9
Views: 31817

Re: Issues faced in measure voltage/source current mode when range is changed

If your circuit is inductive, or behaves like an inductor, a step in current will cause a voltage spike, V = L * di / dt.

The range change can be thought of as a step in current. The derivative of a step is an impulse. The impulse can be high enough to trigger the voltage compliance detection.
by brian.d.smith
May 24th, 2017, 6:39 am
Forum: 2400 Series SourceMeter
Topic: Issues faced in measure voltage/source current mode when range is changed
Replies: 9
Views: 31817

Re: Issues faced in measure voltage/source current mode when range is changed

Try increasing the voltage compliance to see if that cures the problem. The range change behavior may contribute to the compliance issue.
by brian.d.smith
May 24th, 2017, 6:27 am
Forum: 2400 Series SourceMeter
Topic: Issues faced in measure voltage/source current mode when range is changed
Replies: 9
Views: 31817

Re: Issues faced in measure voltage/source current mode when range is changed

The analog behavior during a range change is not continuous. If you consider how the instrument has to make a range change, it is apparent why. There is a feedback resistor in an op amp circuit that has to be changed from one value to another value. This requires opening and closing relays that perf...
by brian.d.smith
May 22nd, 2017, 6:57 am
Forum: DMM7510 Graphical Sampling DMM
Topic: 7510 and KickStart - Sample Count
Replies: 1
Views: 10257

Re: 7510 and KickStart - Sample Count

When using the 7510 and KickStart sample count is limited to 100000, I need to measure at 1000000 sample per second for 5 seconds. can it be done? how? Below is an answer from one of our factory apps engineers: Not in KickStart. KickStart caps the sample count due to data handling issues. For now, ...
by brian.d.smith
May 16th, 2017, 8:48 pm
Forum: 2450/2460 Touchscreen SourceMeter
Topic: How can I use 2450 for realtime Resistance measurement (R_T Curve)?
Replies: 4
Views: 18628

Re: How can I use 2450 for realtime Resistance measurement (R_T Curve)?

I have to check the R_T signal for a long peroid of time, let say 2-3 day. So, how long or how many data point that i can store in the 2450 smu memory? Can I store the data directly to USB during measured the resistance or other signal? From the 2450 Reference Manual page 3-13 ---------------------...
by brian.d.smith
May 16th, 2017, 7:17 am
Forum: DMM7510 Graphical Sampling DMM
Topic: DMM7510, SMU 2450 & 2460 problems
Replies: 40
Views: 122075

Re: DMM7510, SMU 2450 & 2460 problems

Just caused the web interface lock up by clearing the Graph data buffer, then pressing the home button, this is with the static IP like I mentioned above. (note, this was done via the web interface) Closing the web browser, reopening, different PC, nothing, instrument reboot is the only fix. Can yo...

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