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smallest current compliance of 6487 when output 250V ?

2502, 6485, 6487 - Support
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txz033000
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Joined: October 20th, 2014, 12:58 pm
Country: United States

smallest current compliance of 6487 when output 250V ?

Post by txz033000 » March 9th, 2015, 3:17 pm

Hi, All,
I am trying to use our Keithley 6487 to drive one electronic device, but we got some scum/native oxide at the device interface, therefore at first we need to use a high voltage like 250V to break down this scum/native oxide, in order to get electrical signal to the device.((actually it is the electrical field which break down the scum/native oxide). However, once the scum/native oxide is down, the 250V would be all applied over my device; such a high voltage would generate a current high enough (over 100nA) to burn my device. To protect my device, I would like to set the current compliance of 6487 to around 1nA . In 6487 user manual, it did not say what is the smallest current compliance of 6487 when it outputs 250V. could some shine some light on it?


regards,
tao

brian.d.smith
Keithley Applications
Keithley Applications
Posts: 402
Joined: June 10th, 2013, 6:00 am
Country: United States

Re: smallest current compliance of 6487 when output 250V ?

Post by brian.d.smith » March 9th, 2015, 5:42 pm

From the datasheet

SELECTABLE CURRENT LIMIT: 2.5mA, 250μA, 25μA for 50V and 500V ranges, 25mA additional limit for 10V range. All current limits
are –20%/+35% of nominal.

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