Author Topic: Calibration of 34461A  (Read 1211 times)

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Offline kkayser

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Calibration of 34461A
« on: October 01, 2021, 02:36:15 pm »
Trouble using front panel calibration.  When I push the "Perform cal step" button it says cal was successful, but the reading is unchanged.  When I push the "Perform ADC cal" button I returns an error message that the reference voltage was out of range. 
Keysight's tech support has been absolutely no help on this problem.   
 

Offline ElizatronicWarfare

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Re: Calibration of 34461A
« Reply #1 on: October 10, 2021, 09:50:34 pm »
Are you following the calibration procedure laid out in the service manual? Which step do you trip up at?
Professional RF and electronic test-and-measurement technician.
 

Offline kkayser

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Re: Calibration of 34461A
« Reply #2 on: October 11, 2021, 12:34:43 pm »
Following instructions.  Pushing the left cal button says cal was done, but meter still reads wrong.  Pushing the right button says cal source is out of range.
 

Offline HighVoltage

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Re: Calibration of 34461A
« Reply #3 on: October 11, 2021, 12:58:21 pm »
You have to follow the CAL instructions, otherwise it will not work.





« Last Edit: October 11, 2021, 03:30:13 pm by HighVoltage »
There are 3 kinds of people in this world, those who can count and those who can not.
 

Offline ElizatronicWarfare

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Re: Calibration of 34461A
« Reply #4 on: October 11, 2021, 09:31:03 pm »
Did you install the low-thermal shorting block as specified in the manual?
Professional RF and electronic test-and-measurement technician.
 

Offline kkayser

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Re: Calibration of 34461A
« Reply #5 on: October 11, 2021, 09:38:26 pm »
I am calibrating the 10 volt range so I have 10 volts connected to the input terminals.
 

Online bdunham7

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Re: Calibration of 34461A
« Reply #6 on: October 11, 2021, 09:41:15 pm »
OK, so if you take the meter out of calibration mode and simply set it to read your 10V source, what does it say?

Are you trying to calibrate a broken meter?
A 3.5 digit 4.5 digit 5 digit 5.5 digit 6.5 digit 7.5 digit DMM is good enough for most people.
 

Offline ElizatronicWarfare

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Re: Calibration of 34461A
« Reply #7 on: October 11, 2021, 11:37:56 pm »
The ADC Cal process does not use voltages. That is the Gain Adjustment process. Did you perform the ADC and Zero Adjustment processes first? Which version of the 34460A service manual are you using?
Professional RF and electronic test-and-measurement technician.
 

Offline kkayser

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Re: Calibration of 34461A
« Reply #8 on: October 16, 2021, 02:53:34 pm »
I found a work around.  If I apply -10 volts to the input and set the calibration voltage to -10.000000,  push the cal button and the meter reads correctly at + and - 10.00000 volts.  Calibration accomplished, but mystery remains.
 


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