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Fast (<7 ms) measurements with Keithley 2400

Models 2400, 2401, 2410, 2420, 2425, 2430, 2440, 6430
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cynbl123
Posts: 1
Joined: March 15th, 2019, 4:10 pm
Country: United States

Fast (<7 ms) measurements with Keithley 2400

Post by cynbl123 » March 15th, 2019, 4:17 pm

The datasheet for the Keithley 2400 says it can do:
1700 readings/second at 4½ digits via GPIB

1/1700 = 0.0006 s or less than 1 ms. However, I seem to only be able to get measurements spaced by 7 ms when saving to the internal buffer.

I'm setting the reading speed to NPLC = 0.01 (.01/60Hz = 0.0002 s) and then saving the readings to the internal buffer. When I read out the buffer, all the data is spaced by about 7 ms. I've even tried disabling the display (which it says in the manual allows the unit to run faster), but it didn't change the timing.

Anyone know what I'm doing wrong?

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