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Search found 239 matches

by Nathan S
November 28th, 2011, 6:19 am
Forum: PicoAmmeters
Topic: Overflow code at time =0
Replies: 5
Views: 22415

Re: Overflow code at time =0

An overflow message means that the value being read (incoming current) is larger than the range it is currently using to measure. It seems like perhaps autorange is still on as you are getting many digits past what I would expect were you fixed on the 2mA range. All of those values are single or ten...
by Nathan S
November 22nd, 2011, 2:24 pm
Forum: Series 2300
Topic: 2306 OVERFLOW in current line
Replies: 2
Views: 18527

Re: 2306 OVERFLOW in current line

While the current limit is set to 5A, what is the current measurement range on the 2306 as it has 5A, 5mA, and AUTO as selections. You can change this by sending either :SENS:CURR:AUTO ON (auto range on) or :SENS:CURR:RANG 5 (to set to the 5A range, fixed on that range). If you are on the lower rang...
by Nathan S
November 22nd, 2011, 10:35 am
Forum: Electrometers
Topic: 6517A/AF resistance measuring above 100% Full Scale
Replies: 1
Views: 10848

Re: 6517A/AF resistance measuring above 100% Full Scale

The 6517A-AF should be able to measure 2.2GOhms on the 2GOhm range. I tested this on my 6517B here with a 2.2GOhm DUT in Auto Source mode for the Resistance function. I was reading +2.206 GOhm with readings even going up to about 2.4 or so until they settled. Using the lowest range possible will res...
by Nathan S
November 21st, 2011, 9:04 am
Forum: ExcelLINX
Topic: Hooking up 6485 - in series/ExcelLinx
Replies: 5
Views: 22058

Re: Hooking up 6485 - in series/ExcelLinx

It's not seeing it because it is looking for something under the KE6485 driver. You need to go through the Keithley Configuration Panel and go through the Wizard to Add the second 6485 at GPIB0 (I'm guessing), address 16 and make sure it uses the KE6485 driver, NOT the KESCPI driver. After you do th...
by Nathan S
November 21st, 2011, 7:01 am
Forum: Series 2300
Topic: Need help setting up the 2306
Replies: 5
Views: 27658

Re: Need help setting up the 2306

You are correct. The benefit of remote sense is a more accurate reading for the voltage feedback and the cabling with the 2300 family is very important. Being the fast-transient boxes, low inductance, low capacitance cabling is a must. For your testing currently, yes, local sense is fine. But once y...
by Nathan S
November 21st, 2011, 5:59 am
Forum: Series 2300
Topic: Need help setting up the 2306
Replies: 5
Views: 27658

Re: Need help setting up the 2306

Yusif, There are some example LabView programs, the LabView drivers, and other - support available here for the 2306. Perhaps one of the programs will assist you in your programming. http://www.keithley.com/support/keidoc_searchresult?keyword=2306&item_type=All I don't necessarily understand the con...
by Nathan S
November 21st, 2011, 5:50 am
Forum: ExcelLINX
Topic: Hooking up 6485 - in series/ExcelLinx
Replies: 5
Views: 22058

Re: Hooking up 6485 - in series/ExcelLinx

You should be able to run two instruments inside one Excel workbook, but they need to be configured separately. You will need two Meter Config and two Meter Scan sheets, one of each set up for GPIB 14 and GPIB 16.
by Nathan S
November 18th, 2011, 7:44 am
Forum: ExcelLINX
Topic: ExceLINX issues with Model 6487
Replies: 1
Views: 11440

Re: ExceLINX issues with Model 6487

For reference, the above issues are being logged as bugs an will be put into a list as things to look at being fixed for the next release of ExceLINX-2A. As this won't be an instantaneous process, it would likely be best to write custom code for this application using SCPI commands or the IVI driver.
by Nathan S
November 16th, 2011, 2:15 pm
Forum: 2400 Series SourceMeter
Topic: Error +823
Replies: 2
Views: 14356

Re: Error +823

+823 Invalid with Source Readback ON - The measure range must match the source range when measuring the source value. When you power your 2400 on, factory defaults have it sourcing on the 20V range, Icmpl at 105uA, and measure source at 105uA if I'm not mistaken. Personally, I start with a *RST just...
by Nathan S
November 16th, 2011, 12:57 pm
Forum: Low Voltage Measurements
Topic: Thermocouple Switch Application
Replies: 1
Views: 13023

Re: Thermocouple Switch Application

I would look at a 2700 or 2701 with a 7700 card. The 7700 card is a 20 channel differential multiplexer card with automatic CJC. The 2700 is a DMM/Switch mainframe that can use the 77XX family of cards. The 2700 can remotely connect to a PC via GPIB or RS-232, while the 2701 can connect through Ethe...
by Nathan S
November 15th, 2011, 7:04 am
Forum: Low Current Measurements
Topic: 248 + 6514 with ExceLINX for current-voltage measurement?
Replies: 2
Views: 13989

Re: 248 + 6514 with ExceLINX for current-voltage measurement

The 248 will not be able to be controlled by ExceLINX. Also, I do not believe the 248 has sweeping capability. You could definitely write a program using various SCPI commands to control the instruments or use LabView or something similar. You MUST take precautions though for operator safety and the...
by Nathan S
November 15th, 2011, 6:49 am
Forum: 2400 Series SourceMeter
Topic: 2400 Reading wrong values
Replies: 1
Views: 9957

Re: 2400 Reading wrong values

That's a reading error I have not heard of. I have submitted your issue to service to see if they've seen something similar before. In the mean time, how are you using this instrument typically. Sourcing or sinking, what magnitudes, what kind of device under test, etc? Also, what version of firmware...
by Nathan S
November 14th, 2011, 8:32 am
Forum: Series 3700 Switch System/Multimeter and Plug-In Cards
Topic: One-to-Many Instruments Connection for 3706 and 2601A
Replies: 5
Views: 22497

Re: One-to-Many Instruments Connection for 3706 and 2601A

You will not see it in the LXI Browser. It is a node (slave) to the 3706, so let's assume your 3706 is set to Node 1 and the 2601A is Node 2 (you can set this remotely or via the front panel menu). Then when controlling the 3706 via Ethernet, commands (with comments after --) could be: tsplink.reset...
by Nathan S
November 11th, 2011, 9:30 am
Forum: Series 2700 Multimeter/Data Aquisition/Switch System
Topic: vertual channels in 7706?
Replies: 7
Views: 27310

Re: vertual channels in 7706?

If the 7706 is indeed in slot 2, then your channels for the 7706 would be:

ROUT:MULT:CLOS (@201, 211, 228)

The hundreds digit indicates slot number.
by Nathan S
November 10th, 2011, 1:25 pm
Forum: Series 3700 Switch System/Multimeter and Plug-In Cards
Topic: One-to-Many Instruments Connection for 3706 and 2601A
Replies: 5
Views: 22497

Re: One-to-Many Instruments Connection for 3706 and 2601A

If going through an Ethernet hub/switch, all connections can be patch cables (non-crossover). However, also note you do not necessarily need a hub for this connection. As you are using 3706 and 2600A family, you can just chain them together using TSPlink and nodes. You can then have the PC control t...
by Nathan S
November 9th, 2011, 2:24 pm
Forum: Nanotechnology Measurements
Topic: Keithley 6430 Setup for CNT measurement
Replies: 3
Views: 21409

Re: Keithley 6430 Setup for CNT measurement

Rachel, For a CNT resistance measurement (that I assume is low resistance), I suggest using a 4wire connection and offset-compensated Ohms. Section 4 of the 6430 instruction manual should explain the front panel steps for this. It is available for download here: http://www.keithley.com/support/data?...
by Nathan S
November 9th, 2011, 6:47 am
Forum: Low Current Measurements
Topic: Keithley 2602A Low current measurement accuracy
Replies: 2
Views: 14648

Re: Keithley 2602A Low current measurement accuracy

High-C mode is spec'ed to have a typical maximum load impedance of 50uF. That isn't to say it won't be able to go higher, but that is a case by case basis and not guaranteed. My guess is you are oscillating on your sourcing SMU to the DUT, so I would recommend putting a scope on there to verify that...
by Nathan S
November 8th, 2011, 1:49 pm
Forum: 2600 Series SourceMeter
Topic: 2636A Operating Boundaries
Replies: 7
Views: 27361

Re: 2636A Operating Boundaries

The PulseIMeasureV is a grandfathered in function from the non-A 2600 family. Personally, I recommend using the ConfigPulseIMeasureV() and InitiatePulseTest() as they use the 2600A trigger model. These are on Page 7-32 and 7-104 of the 2600A reference manual Rev. E respectively. Try this instead and...
by Nathan S
November 8th, 2011, 11:34 am
Forum: 2600 Series SourceMeter
Topic: 2636A Operating Boundaries
Replies: 7
Views: 27361

Re: 2636A Operating Boundaries

From the 2600A reference manual: PulseIMeasureV(smu, bias, level, ton, toff, points) Therefore, it doesn't like you trying to bias above 1.5A. I would try something like PulseIMeasureV(smua, 0, 1.7, 0.001, 0.999, 3) and see if that works for you. Also, I don't believe LabTracer supports pulsing for ...
by Nathan S
November 2nd, 2011, 12:59 pm
Forum: Low Voltage Measurements
Topic: 2-wire and 4-wire Voltage measurements
Replies: 5
Views: 27499

Re: 2-wire and 4-wire Voltage measurements

You should still be in sink mode. You can check this by if connected remotely, send:

print(smuX.source.sink)

This will return a 0 or 1 showing whether Sink Mode is Off or On respectively.

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