Andrea C

Just confirming you have the older 3706 and not the 3706<strong>A?</strong><br> <br> &#160;Assuming 3706, page 7-2 of User Manual has the upgrade instructions.<br> (https://www.tek.com/en/switching-and-data-acquisition-systems/3700a-systems-switch-multimeter-manual-3)<br> <br> With the thumb drive inserted, you need to use the menu to navigate to the UPGRADE screen.&#160; Then the content from the thumb drive will be applied.<br> The two files that you placed will cause any &quot;autoexec&quot; application of the firmware update.

Can you clarify which forum post gives you this error?<br> The posts you have pertaining to Clarius install seem fine to me;&#160; &#160;not errors to display.

You may want to revisit the idea of using 2W for the high ohms channel.<br> When a measure function is associated with a channel, then when closing that channel, all the required channel pairing (in case of 4W) and backplane relays are managed for you.<br> So a scan that uses both 2W and 4W will mange the backplanes appropriately for the closed channel.<br> <br> If using a scan with mixed measure function type, I'm able to reliably measure 50MΩ (2Wire) and 0.5Ω (4Wire) on two different channels.&#160; See attached.<br> <br> If not performing a scan and attempting use of 4W with the 50MΩ, I find extra settling time is needed.<br> I'm not able to find a command in the IVI driver.&#160; So using the WriteString() to send:&#160; &quot;:ROUT:DEL 0.25, (@106)&quot;&#160; to obtain an extra 250msec on channel 106.<br> <br> See attached for info on both defining a scan or the single channel read approach.

If you want to connect the two meters together without soldering a cable, need three items:<br> triax cable to 6430 preamp (7078-TRX-3)<br> Insert 237-BNC-TRX into end of 7078-TRX-3 cable<br> Put 7078-TRX-BNC triax to BNC adapter onto 6517B;&#160; attach the cable.<br> <br> If you want to make your own, see attached image.

How long are your cables from the 7707 and the devices?<br> <br> Also, for the high ohm channel, can you instead use 2W ohms mode?<br> I suspect part of the settling time issue will be for charging up the remote sense lines.<br> For 10M-Ohm and higher DUT value, the use of 4W is of negligible benefit and in this case might be giving you a longer settling time problem.

For topic #2, check the state of your interlock.&#160; I suspect that is not engaged and it is normal for the instrument to clamp the output below ~42V.&#160; In your case, you are hitting the voltage clamp level and so the current forcing is not the primary action of the SMU any longer;&#160; the actual current will be the clamped V / DUT R.<br> <br> For topic #1, error 5111 is because the measure time will exceed the requested pulse width.<br> Try setting the NPLC to minimum of 0.01 which for 60Hz power equates to 166.7usec.<br> Make sure you turn off the source readback;&#160; that defaults to ON which means two measurements occur (one for V and one for I) which at 0.01 NPLC puts you past the 250usec pulse width.&#160; Turn it off so that if forcing I, it only measures V and does not also read back the source level.<br> Source or Measure Delays could also be playing a role;&#160; set them to zero.<br> <br> Last:&#160; make sure your firmware level is up to date.&#160; 1.7.12b is current release.

Hi Daniel,<br> <br> Interesting combination of products you have.&#160; Too bad the gate SMU is 2601B and not 2611B.<br> I'm conferring with factory about the 40V models and if the ~200V OVP is sufficient.<br> <br> <br> For the handling of the LO and Sense LO from the 2657A and the 2601B, we do have a &quot;ground unit&quot; accessory item:&#160; 2657A-LIM-3.<br> A single triax cable from the SLO/LO connector on each SMU is brought to the LIM-3.<br> The LIM-3 then provides output connectors for the combined LO and separately for the combined SLO.<br> the LIM-3 also provides interlock hub.<br> <br> <a href="https://www.tek.com/en/default-accessory-series-manual-29">Info on the 2657A-LIM-3</a><br> <br> Let me come back to you concerning the 40V model.<br> <br> Do you have any of the 2600-TRIAX accessory items to convert the 8-pin Phoenix connector to three triax for the gate SMU?<br> &#160;

When you run into the trouble, find the gpib related DLL and right click to see properties; &#160;namely the author/publisher.<br> <br> You can have LabVIEW and other NI software (VISA) installed. &#160;Just don’t let the NI support for GPIB cards install, else it will overwrite the DLLs that need to be for your KPCI488-488A gpib interface card.<br> One strategy would be to install&#160;KPCI488-488A driver after other NI related software is installed.<br> &#160;

The appendix B code is configuring the instrument to use binary data format (format.data = format.REAL32).<br> Compared to ASCII, this allows fewer characters on the bus for better throughput.<br> <br> To interpret the data, checkout some IEEE754 compliant techniques.<br> I think numpy and fromfile might be useful.

Model 2450 uses integrating A/D converter type.<br> It is custom implementation, but is reasonable to think of it as dual slope integrating A/D of about 22 bits at 1 NPLC.<br> The NPLC setting is affecting the duration of the integration or how long you let your signal “charge up” the cap.<br> Regardless of NPLC value, a reported measurement is based on sample size of one.<br> <br> In contrast, some of our products have both high accuracy integrating A/D and fast digitizing A/D.<br> The digitizer always runs at 1MHz; &#160;requested sampling rates slower than 1MHz can make use of auto aperture based averaging from the 1MHz data. &#160;SMU models such as 2461, 2651A have digitizers in addition to integrator.