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Standard configuration

Hello

In order to measure the resistance I have connected one 8508A to measure the current and the other to measure the voltage, then I only will do the math R=V/I. 

I have tried to use two 8508A standard and I couln't configure both in the same procedure, I only can use one

For example here i want to measure the voltage

8508         50.00V         0.05U                                 2W

My problem is when i try to measure the current because I use another 8508A

8508         2.000A         0.014U                                2W

Here i can only measeure with the same 8508A that i have measured the first time.

The instrument that i want to calibrate is the AEMC 6472

Thanks.

7 comments

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Michael Johnston

You can't use two of them with the FSC. You can use an alias to allow you to send GPIB commands to both, though. In the setup for the 8508s, add aliases on each, for one do 8508a and the other 8508b and then you can use the IEEE or SCPI FSCs and send commands by referencing [@8508a] or [@8508b] depending on which one you want to control for that measurement.

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Michael Johnston

You can't use two of them with the FSC. You can use an alias to allow you to send GPIB commands to both, though. In the setup for the 8508s, add aliases on each, for one do 8508a and the other 8508b and then you can use the IEEE or SCPI FSCs and send commands by referencing [@8508a] or [@8508b] depending on which one you want to control for that measurement.

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David Hicks

If you have an 8508A/01 with rear panel inputs, you could use only one 8508A and measure the voltage on the front panel inputs and the current on the rear panel inputs (or vice versa). The MET/CAL 8508 FSC will support the rear panel inputs.

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Dale Chaudiere

IEEE or IEEE2 FSC only.  The 8508A is not SCPI.  I have used the IEEE2 FSC with no problems.

To see how the 8508A is programmed, you can use the 8508 FSC and enable IEEE-488 I/O in the 8.x Editor.

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Michael Johnston

Didn't realize it wouldn't work with SCPI. We've only got one of them in the lab, so I'm just used to using 3458.

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Dale Chaudiere

The 3458A is not even IEEE-488.2.  Do not attempt to use the IEEE2 or SCPI FSCs with the 3458A.

Note, the only difference between the IEEE2 and SCPI FSCs is what happens when one of the error bits is set in the Extended Status Register (ESR).  When the SCPI FSC is used and one of these bits is set, the FSC automatically sends SYST:ERR? and displays response, until the first character in the response is an ASCII zero '0', (e.g. response: 0,"No Error").  When the IEEE2 FSC is used, the only error messages generated are:

Query Error, ESR bit 2

Device Dependent Error, ESR bit 3

Execution Error, ESR bit 4

Command Error, ESR bit 5

The IEEE2 FSC has no way to know device specific commands to retrieve further error information (e.g. there is no standard error query like SCPI "SYSTem:ERRor?")

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Michael Johnston

Right, should have been clear, I just assumed that the 8508 was SCPI compliant but since I don't use it much I didn't know. Doesn't really have anything to do with the 3458.

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