[volt-nuts] Datron 1281 DMM Serial Interface Fault

Datron 1281 DMM gives error 9005.10   Pon  CI/RTx   002888 on power up. Sometimes the DMM powers up in the working condition, but then gives error 9005.6   A-D Timeout   001940. How to troubleshoot these errors? Thanks John ___ volt-nuts mailing list

[volt-nuts] Datron 1281 offset null, Bias current adjustments

I have a Datron 1281 DMM. How to set the bias current adjustment (R222)? How to set the offset null adjustment (R317)? Thanks, John Staron ___ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to

[volt-nuts] Datron 1281 offset null, Bias current adjustments

I have a Datron 1281 DMM. How to set the bias current adjustment (R222)? How to set the offset null adjustment (R317)? Thanks, John Staron ___ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to

[volt-nuts] Fluke 845AB 1993 Modification Schematic

Need the schematic of the Fluke 845AB 1993 modification. Thanks, John ___ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.

[volt-nuts] Datron 1281 Repair Help ADC Key A to D Converter Calibration

When I use the SPCL Menu ADC Key I obtain the following error A to D CORRN, Error 2008. No other errors are listed. What does this indicate? After the ADC Cal I obtain the following readings with a constant voltage. Resolution: 8 digit 10.000 106 7 7 digit 10.000

[volt-nuts] Datron 1281 Reference Module

What are the values of the resistors in U3 (Resistor Network) of the reference Module? Where to find a 400763-1 reference module for a Datron 1281? Thanks, John ___ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to

[volt-nuts] Datron 1281 Reference Module 400763-1 Schematic

Does anyone have the schematic for the Datron 1281 Reference Module? Thanks, John ___ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.

[volt-nuts] Datron 1281 Selcal Multiplier

These error codes 2292, 2282, 2272, 2262, 2252, 2216, and 2214 all use the Selfcal Multiplier circuit. I have all the error codes listed above, when doing a INT SRCE CAL. Output at M609 pin-2 is not a dc level, therefore M609 pin-15 is a sawtooth waveform. Output on M609 pin-2 is a 10% duty on

[volt-nuts] Datron 1281 A_D CORRN ERROR 2008

What does A-D CORRN error 2008 , (no other error codes listed ) mean to the A_D? How to troubleshoot this error? ___ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow

[volt-nuts] Datron 1281 Repair Help

I am working on a Datron 1281 meter. DC voltage calibration at 10v functions ok, but the Internal source calibration failed. This Meter has the following errors after Internal Source Calibration. Error codes: 2202 1KVRange zero magnitude test (P028). 2192 100V Range zero magnitude test

Re: [volt-nuts] Fluke 845 Modification LTC2057

On 12/28/2013 6:54 PM, Randy Evans wrote: I am in the process of designing an upgrade for a Fluke 845 Null meter to eliminate the opto-chopper, which doesn't work in most units today. I am planning on using the Linear Tech LTC2054 zero drift op amp and power it with two 3V lithium batteries