Re: [volt-nuts] Wavetek 1281 - Calibration Key
- Original Message - From: "Todd Micallef" To: "Discussion of precise voltage measurement" Sent: Sunday, November 01, 2015 8:23 PM Subject: Re: [volt-nuts] Wavetek 1281 - Calibration Key Unfortunately, when I had my keys made for the 4700, I took the lock out of a broken 1071 to the locksmith. I originally showed them photos of an actual key and they looked at me like I was crazy. I could only find two locksmiths near me for the 4700 and a Valhalla 2724A. Both wanted a lock before they would try to brute force a new key. It appears that the locks are different with the Wavetek gear. I have already sent a message to the seller of the 1271 and I hope to hear something soon. If not, I will desolder the wires and remove the lock and carry it to one of the locksmiths. At least they only charged me $10 for the time and two keys for my Valhalla. On Sun, Nov 1, 2015 at 12:32 PM, gilb...@nickgilbert.org < gilb...@nickgilbert.org> wrote: Assuming the Wavetek branded meters use the same key as the Datron, the link below is a 1071 cal/service manual from KO4BB, which has a really good photocopy of the calibration key on the last page. Print on cardstock, sharpie the notches on a suitable blank, take the marked blank to a locksmith or cut yourself. Better yet, see if the other seller will send you some photos of the 1271 key. Same process applies. I just gave a locksmith the picture and he did all the leg work for $15 and I had it same-day. Sometimes there is a number and a name on the key. Googleing the number will sometimes find a like key. Also, a locksmith may also be able to find a copy. ___ 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.
Re: [volt-nuts] Wavetek 1281 - Calibration Key
Unfortunately, when I had my keys made for the 4700, I took the lock out of a broken 1071 to the locksmith. I originally showed them photos of an actual key and they looked at me like I was crazy. I could only find two locksmiths near me for the 4700 and a Valhalla 2724A. Both wanted a lock before they would try to brute force a new key. It appears that the locks are different with the Wavetek gear. I have already sent a message to the seller of the 1271 and I hope to hear something soon. If not, I will desolder the wires and remove the lock and carry it to one of the locksmiths. At least they only charged me $10 for the time and two keys for my Valhalla. On Sun, Nov 1, 2015 at 12:32 PM, gilb...@nickgilbert.org < gilb...@nickgilbert.org> wrote: > Assuming the Wavetek branded meters use the same key as the Datron, the > link below is a 1071 cal/service manual from KO4BB, which has a really good > photocopy of the calibration key on the last page. Print on cardstock, > sharpie the notches on a suitable blank, take the marked blank to a > locksmith or cut yourself. Better yet, see if the other seller will send > you some photos of the 1271 key. Same process applies. > > I just gave a locksmith the picture and he did all the leg work for $15 > and I had it same-day. > > > > http://www.ko4bb.com/manuals/76.107.156.21/Datron_1071_Multimeter_Cal_and_Service_Handbook.pdf > ___ > 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.
Re: [volt-nuts] Wavetek 1281 - Calibration Key
Assuming the Wavetek branded meters use the same key as the Datron, the link below is a 1071 cal/service manual from KO4BB, which has a really good photocopy of the calibration key on the last page. Print on cardstock, sharpie the notches on a suitable blank, take the marked blank to a locksmith or cut yourself. Better yet, see if the other seller will send you some photos of the 1271 key. Same process applies. I just gave a locksmith the picture and he did all the leg work for $15 and I had it same-day. http://www.ko4bb.com/manuals/76.107.156.21/Datron_1071_Multimeter_Cal_and_Service_Handbook.pdf ___ 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] Wavetek 1281 - Selfcal Module
Hello Alan, I'm investigating about the ACAL function of the Keysight 34465A / 34470A DMMs, and so collecting ideas, how they might have realized that in hardware. I had a long discussion with Keysight about an obvious 3ppm failure on the 100V and 1kV DCV ranges, (fixed now), and an additional odd gain shift caused by this ACAL feature, at last with Scott Stever, who also was the PM of the 3458A. They described the functionality of their ACAL very briefly only.. so I'm still guessing.. The similarity between the 1281 Selfcal and these Keysight DMMs ACAL is, that there is obviously a ratio circuitry inside, which gain factors are determined once during calibration, and then used later to improve the T.C., each time when ACAL or Selfcal is engaged. I think, I have to re-engineer the 34465A to find out. And no, I'm not designing any new Autocal device. I already have 3 different superior ratio devices, the HP 3458A, the Fluke 5442A, and another DIY Hamon divider, I think, that's enough! Frank > Frank, > Are you hatching up a new selfcal/autocal design for your 8.5 digit? I would be interested to hear your musings. > Alan ___ 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.
