Joe, Sorry to be so late answering this post but I'm 'tied up' right now and can't get to all my data.
However, I have sent DMM's to Agilent (3458A), Fluke (289 and 8846A), and Ametek - Solartron (7081). Agilent was for their 'Agilent Cal' and it included 'As Found' and 'As Left' data with 'adjustments' made for meters that were 'in cal' 'As Found'. Fluke was for their Z540 cal. On the 289, three types of data were offered, 'As Found', 'As Left', and 'As Found - As Left'. Both my 289's were 'in cal' and all I got back was 'As Found - As Left' and no adjustments were made. I can't recall what the 8846A was but I think it was for their Z540 cal, some measurements were out of cal, and adjustments were made. Ametek gave 'As Found', 'As Left', and both repairs and adjustments were made and included returning the replaced parts. Comparing these meters to each other, using a Fluke 335A, Fluke 5450A, EDC CR103J, and a Fluke 5100B, they are amazingly close. Therefore, I feel that these three companies provide a good service. I had occasion (as a result of 'killing' the NVRAM by trying to read it while still 'hot' from the removal process) to calibrate a 3458A using my recently calibrated 7081. I did not have a satisfactory AC source at the time and used a 3326A, Fluke 335A, and some standard resistors. I then sent the 3458A to Agilent and the 'As Found' data was all 'in cal' except for two of the 'mid-range' AC scales. Now that I have a Fluke 5100B, I think I could do a good job calibrating any meter by using my 3458A as a 'transfer standard'. I have also calibrated a 3478A that I managed to lose the NVRAM data on and it appears to be accurate as well. I have not sent it to Agilent though I have been thinking about doing that. Good luck. Joe -----Original Message----- From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] On Behalf Of Joseph Gray Sent: Wednesday, August 07, 2013 11:30 AM To: Discussion of precise voltage measurement Subject: [volt-nuts] DMM calibration I just got the following quote for getting my HP 3478A calibrated. 35.00 for ISO 9001 no data 87.50 for Z540 with data and uncertainties 275.00 for 17025 with data, uncertainties and logo calibration. I still didn't get any explaination as to exactly what the lab does for each of these price points. When I asked about the "Level 4" listed next to the meter, I was told that it is the difficulty level. Still not telling me much. I have read the procedure in the HP service manual and it is very easy. You set some volt, amp, ohm values on the standard, then push some buttons on the meter. I understand about getting data or not, it is the other aspects that I don't understand. What is Z540, 17025 and "logo calibration"? Joe Gray W5JG _______________________________________________ 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 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.