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Author Topic: HP 34401A current fail  (Read 1050 times)

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Offline abdulTopic starter

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HP 34401A current fail
« on: September 03, 2019, 08:47:34 am »
Hello i need help to repair HP34401A  selt test pass but it fails when measuring current for both AC & DC till 1.2 Amps ok after that its showing excess for example if we give 1.3Amps it shows 2.7Amps. I changed IC U201 still same can any one help me to solve this problem
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Offline Yansi

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Re: HP 34401A current fail
« Reply #1 on: September 03, 2019, 08:48:59 am »
Fucked up current shunt, maybe?
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Online Kleinstein

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Re: HP 34401A current fail
« Reply #2 on: September 03, 2019, 10:01:18 am »
Internally the 100 mV range is used to measure the voltage at the shunt. So it the 100 mV range working correct ?
 
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Offline abdulTopic starter

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Re: HP 34401A current fail
« Reply #3 on: September 03, 2019, 10:47:05 am »
Thanks
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Offline abdulTopic starter

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Re: HP 34401A current fail
« Reply #4 on: September 03, 2019, 10:48:00 am »
Thanks to all
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Offline HighVoltage

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Re: HP 34401A current fail
« Reply #5 on: September 03, 2019, 11:56:49 am »
What is the resistance between the current terminals in the different current range modes?
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