Re: [volt-nuts] 7061 On Board Clock and Battery
I didn't have the time to study my 7061 enough. I just gave an eye to the pcb's: The earthy logic has this sticker: PCB 70610513A main firmware memories are D27C256D-15 the revision is AB floating logic pcb is 70610515X B SP1 selects 2716 memories SP2 selects 2732/64 memories on the pcb there is also an hand written sticker : ST/255/34 A0011 The memories on floating board are 4 M5L2764 k-2 with FW revision CA As I understand these memories don't contain executable code but data bit patterns used to command various signals needed for the measurements setup. The SP1/SP2 selects the address line A11 on the memories for +5V or Ground, so one of the two has to be shorted. It's strange that mine are both disconnected, it isnt ok leaving the address line disconnected. When I have time I must indagate better. Fabio. "J. L. Trantham" ha scritto: OK! Now I understand. On my unit, SP1 is soldered 'closed'. SP2 is 'open'. As I said earlier, I have the 'AA' version of the Floating firmware with TMS2516-45JL chips that have 24 pins. They are on the PCB 70610505Y F board which I interpret to be the 'Revision F' board. There is room for a 28 pin socket. I wonder if it would be possible to modify my board for the 28 pin EPROM's? I would be interested in knowing what board the 2764 chips are on. Thanks. Joe -Original Message- From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] On Behalf Of Fabio Eboli Sent: Monday, June 25, 2012 5:03 PM To: Discussion of precise voltage measurement Subject: Re: [volt-nuts] 7061 On Board Clock and Battery I don't understand 'SP1 and SP2 on floating board are both open circuit'. To what does this refer? In this photo... ... the photo :) http://www.flickr.com/photos/14336723@N08/7443455140/ Fabio. This message was sent using IMP, the Internet Messaging Program. ___ 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. This message was sent using IMP, the Internet Messaging Program. ___ 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] 7061 On Board Clock and Battery
Major caveats: #1) - Can't get the flickr image to show (marginal internet -- rainfade) #2) - I am not familiar with the unit in question That being said, if the jumpers are near the EPROM, they might be used to set different versions of software. I used to work with embedded systems with different and concurrent hardware versions and it was easier to have a single 64KB EPROM and run four different versions of a 16KB app. By jumpering the high bits of the address line, you could have the first version live in the 0-16KB block, the second version live in the 16KB-32KB block, etc. Kept parts count down and made updates simple. This may be the case here but your mileage may vary... Dave > -Original Message- > From: volt-nuts-boun...@febo.com > [mailto:volt-nuts-boun...@febo.com] On Behalf Of J. L. Trantham > Sent: Monday, June 25, 2012 17:54 > To: 'Discussion of precise voltage measurement' > Subject: Re: [volt-nuts] 7061 On Board Clock and Battery > > OK! > > Now I understand. On my unit, SP1 is soldered 'closed'. SP2 > is 'open'. > > As I said earlier, I have the 'AA' version of the Floating > firmware with > TMS2516-45JL chips that have 24 pins. They are on the PCB > 70610505Y F board > which I interpret to be the 'Revision F' board. There is > room for a 28 pin > socket. I wonder if it would be possible to modify my board > for the 28 pin > EPROM's? > > I would be interested in knowing what board the 2764 chips are on. > > Thanks. > > Joe > > -Original Message- > From: volt-nuts-boun...@febo.com > [mailto:volt-nuts-boun...@febo.com] On > Behalf Of Fabio Eboli > Sent: Monday, June 25, 2012 5:03 PM > To: Discussion of precise voltage measurement > Subject: Re: [volt-nuts] 7061 On Board Clock and Battery > > >> I don't understand 'SP1 and SP2 on floating board are both > open circuit'. > >> To what does this refer? > > > > In this photo... > > ... the photo :) > > http://www.flickr.com/photos/14336723@N08/7443455140/ > > Fabio. > > > This message was sent using IMP, the Internet Messaging Program. > > > > ___ > 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. ___ 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] 7061 On Board Clock and Battery
OK! Now I understand. On my unit, SP1 is soldered 'closed'. SP2 is 'open'. As I said earlier, I have the 'AA' version of the Floating firmware with TMS2516-45JL chips that have 24 pins. They are on the PCB 70610505Y F board which I interpret to be the 'Revision F' board. There is room for a 28 pin socket. I wonder if it would be possible to modify my board for the 28 pin EPROM's? I would be interested in knowing what board the 2764 chips are on. Thanks. Joe -Original Message- From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] On Behalf Of Fabio Eboli Sent: Monday, June 25, 2012 5:03 PM To: Discussion of precise voltage measurement Subject: Re: [volt-nuts] 7061 On Board Clock and Battery >> I don't understand 'SP1 and SP2 on floating board are both open circuit'. >> To what does this refer? > > In this photo... ... the photo :) http://www.flickr.com/photos/14336723@N08/7443455140/ Fabio. This message was sent using IMP, the Internet Messaging Program. ___ 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] 7061 On Board Clock and Battery
I don't understand 'SP1 and SP2 on floating board are both open circuit'. To what does this refer? In this photo... ... the photo :) http://www.flickr.com/photos/14336723@N08/7443455140/ Fabio. This message was sent using IMP, the Internet Messaging Program. ___ 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] 7061 On Board Clock and Battery
I'll investigate the statistics function after I make sure it is 'in range' as far as the calibration goes. Ok, thank you. I don't understand 'SP1 and SP2 on floating board are both open circuit'. To what does this refer? In this photo, low center (sorry, it's an out of focus area) on the right side of the last eprom there are two solder jumpers, that should select the eprom size used. The manual says that one of the two jumpers has to be closed to select 2716 or 2764. In mine both are open and if I close the right one (dont remember if SP1 or 2) my meter stops working correctly. Fabio. Thanks. Joe -Original Message- From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] On Behalf Of Fabio Eboli Sent: Monday, June 25, 2012 10:54 AM To: Discussion of precise voltage measurement Subject: Re: [volt-nuts] 7061 On Board Clock and Battery Interesting, these roms are mine's: http://www.ko4bb.com/Manuals/04)_ROM_Images_and_Drivers/Solartron_7061_ROMs. zip I have also a problem with statistics, seem that the standard deviation calculation is wrong: http://www.febo.com/pipermail/volt-nuts/2012-April/001793.html If you have time to test yours for this I would be grateful. Another thing is that on mine SP1 and SP2 on floating board are both open circuit. Fabio. "J. L. Trantham" ha scritto: Fabio, Thanks for the link to the pictures. I never seem to remember eevblog when it comes to looking for stuff. Your pictures show that your Earthy board is completely different from mine in the area of 'B101'. You have no place for B101. Also, your Floating board is different in that you have the 'CA' firmware and 28 pin EPROM's. I wonder if anyone has modified my 'version' of the Floating board to use 28 pin EPROM's and if there would be any utility to doing this. I did not get a message directly from you (that I recognized at least). I'll try to send you one directly to make sure we can 'establish communications'. Joe -Original Message- From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] On Behalf Of Fabio Eboli Sent: Monday, June 25, 2012 5:14 AM To: Discussion of precise voltage measurement Subject: Re: [volt-nuts] 7061 On Board Clock and Battery Here are some pics of the mine, only one battery: http://www.eevblog.com/forum/product-reviews-photos-and-discussion/solartron -7061-help-and-come-photos/msg93650/#msg93650 As for the manual I did try to contact you directly, did you read the message? Fabio. "J. L. Trantham" ha scritto: My 7061 has a single battery installed, B501, a 3.6 V Ni-MH Rechargeable 3 pin battery. My 7081 has two batteries installed, the same 3.6 V Ni-MH Rechargeable battery and a ½ AA Lithium Battery that serves as the onboard clock backup battery. It is connected with its negative pin to a 47K resistor to ground and its positive pin to a diode that feeds a connection that is also fed by another diode from the main power supply. The common connection of these diodes feed the clock chip. On my 7061 there is a location, B101 that appears to be for the same type ½ AA Lithium Battery. The + pin connects to a diode, in a manner similar to that described above, and the pin connects to a space for a resistor, R117, with the other end of the resistor going to ground. Both the battery, B101, and the resistor, R117, are missing. My questions are: 1. Does anyone have a 7061 with this battery and resistor installed? 2. If so, what is the value of the resistor, R117, and what type is the battery? It seems that this would be an easy addition to get a live clock without the need to restart the clock each time the meter is turned on. Or, perhaps there is a reason why this in not a good idea. Thanks in advance. Joe ___ 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. This message was sent using IMP, the Internet Messaging Program. ___ 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. This message was sent using IMP, the Internet Messaging Program. ___ 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 in
Re: [volt-nuts] 7061 On Board Clock and Battery
Fabio, I uploaded the EPROM contents from my meter to Didier's site as well. The Floating board I have has 'AA' version firmware while yours is 'CA'. Mine uses TMS2516 chips that are 24 pin and I think yours are 2764 28 pin chips. I'll investigate the statistics function after I make sure it is 'in range' as far as the calibration goes. I don't understand 'SP1 and SP2 on floating board are both open circuit'. To what does this refer? Thanks. Joe -Original Message- From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] On Behalf Of Fabio Eboli Sent: Monday, June 25, 2012 10:54 AM To: Discussion of precise voltage measurement Subject: Re: [volt-nuts] 7061 On Board Clock and Battery Interesting, these roms are mine's: http://www.ko4bb.com/Manuals/04)_ROM_Images_and_Drivers/Solartron_7061_ROMs. zip I have also a problem with statistics, seem that the standard deviation calculation is wrong: http://www.febo.com/pipermail/volt-nuts/2012-April/001793.html If you have time to test yours for this I would be grateful. Another thing is that on mine SP1 and SP2 on floating board are both open circuit. Fabio. "J. L. Trantham" ha scritto: > Fabio, > > Thanks for the link to the pictures. I never seem to remember eevblog when > it comes to looking for stuff. > > Your pictures show that your Earthy board is completely different from mine > in the area of 'B101'. You have no place for B101. Also, your Floating > board is different in that you have the 'CA' firmware and 28 pin EPROM's. I > wonder if anyone has modified my 'version' of the Floating board to use 28 > pin EPROM's and if there would be any utility to doing this. > > I did not get a message directly from you (that I recognized at least). > I'll try to send you one directly to make sure we can 'establish > communications'. > > Joe > > -Original Message- > From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] On > Behalf Of Fabio Eboli > Sent: Monday, June 25, 2012 5:14 AM > To: Discussion of precise voltage measurement > Subject: Re: [volt-nuts] 7061 On Board Clock and Battery > > > Here are some pics of the mine, only one battery: > http://www.eevblog.com/forum/product-reviews-photos-and-discussion/solartron > -7061-help-and-come-photos/msg93650/#msg93650 > > As for the manual I did try to contact you directly, > did you read the message? > > Fabio. > > "J. L. Trantham" ha scritto: > >> My 7061 has a single battery installed, B501, a 3.6 V Ni-MH >> Rechargeable 3 pin battery. My 7081 has two batteries installed, the >> same 3.6 V Ni-MH Rechargeable battery and a ½ AA Lithium Battery that >> serves as the onboard clock backup battery. It is connected with its >> negative pin to a 47K resistor to ground and its positive pin to a >> diode that feeds a connection that is also fed by another diode from >> the main power supply. The common connection of these diodes feed the >> clock chip. >> >> >> >> On my 7061 there is a location, B101 that appears to be for the same >> type ½ AA Lithium Battery. The + pin connects to a diode, in a manner >> similar to that described above, and the pin connects to a space >> for a resistor, R117, with the other end of the resistor going to >> ground. Both the battery, B101, and the resistor, R117, are missing. >> >> >> >> My questions are: >> >> >> >> 1. Does anyone have a 7061 with this battery and resistor installed? >> 2. If so, what is the value of the resistor, R117, and what type is the >> battery? >> >> >> >> It seems that this would be an easy addition to get a live clock >> without the need to restart the clock each time the meter is turned >> on. Or, perhaps there is a reason why this in not a good idea. >> >> >> >> Thanks in advance. >> >> >> >> Joe >> >> ___ >> 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. >> > > > > This message was sent using IMP, the Internet Messaging Program. > > > > ___ > 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] 7061 On Board Clock and Battery
Interesting, these roms are mine's: http://www.ko4bb.com/Manuals/04)_ROM_Images_and_Drivers/Solartron_7061_ROMs.zip I have also a problem with statistics, seem that the standard deviation calculation is wrong: http://www.febo.com/pipermail/volt-nuts/2012-April/001793.html If you have time to test yours for this I would be grateful. Another thing is that on mine SP1 and SP2 on floating board are both open circuit. Fabio. "J. L. Trantham" ha scritto: Fabio, Thanks for the link to the pictures. I never seem to remember eevblog when it comes to looking for stuff. Your pictures show that your Earthy board is completely different from mine in the area of 'B101'. You have no place for B101. Also, your Floating board is different in that you have the 'CA' firmware and 28 pin EPROM's. I wonder if anyone has modified my 'version' of the Floating board to use 28 pin EPROM's and if there would be any utility to doing this. I did not get a message directly from you (that I recognized at least). I'll try to send you one directly to make sure we can 'establish communications'. Joe -Original Message- From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] On Behalf Of Fabio Eboli Sent: Monday, June 25, 2012 5:14 AM To: Discussion of precise voltage measurement Subject: Re: [volt-nuts] 7061 On Board Clock and Battery Here are some pics of the mine, only one battery: http://www.eevblog.com/forum/product-reviews-photos-and-discussion/solartron -7061-help-and-come-photos/msg93650/#msg93650 As for the manual I did try to contact you directly, did you read the message? Fabio. "J. L. Trantham" ha scritto: My 7061 has a single battery installed, B501, a 3.6 V Ni-MH Rechargeable 3 pin battery. My 7081 has two batteries installed, the same 3.6 V Ni-MH Rechargeable battery and a ½ AA Lithium Battery that serves as the onboard clock backup battery. It is connected with its negative pin to a 47K resistor to ground and its positive pin to a diode that feeds a connection that is also fed by another diode from the main power supply. The common connection of these diodes feed the clock chip. On my 7061 there is a location, B101 that appears to be for the same type ½ AA Lithium Battery. The + pin connects to a diode, in a manner similar to that described above, and the pin connects to a space for a resistor, R117, with the other end of the resistor going to ground. Both the battery, B101, and the resistor, R117, are missing. My questions are: 1. Does anyone have a 7061 with this battery and resistor installed? 2. If so, what is the value of the resistor, R117, and what type is the battery? It seems that this would be an easy addition to get a live clock without the need to restart the clock each time the meter is turned on. Or, perhaps there is a reason why this in not a good idea. Thanks in advance. Joe ___ 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. This message was sent using IMP, the Internet Messaging Program. ___ 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. This message was sent using IMP, the Internet Messaging Program. ___ 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] 7061 On Board Clock and Battery
Fabio, Thanks for the link to the pictures. I never seem to remember eevblog when it comes to looking for stuff. Your pictures show that your Earthy board is completely different from mine in the area of 'B101'. You have no place for B101. Also, your Floating board is different in that you have the 'CA' firmware and 28 pin EPROM's. I wonder if anyone has modified my 'version' of the Floating board to use 28 pin EPROM's and if there would be any utility to doing this. I did not get a message directly from you (that I recognized at least). I'll try to send you one directly to make sure we can 'establish communications'. Joe -Original Message- From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] On Behalf Of Fabio Eboli Sent: Monday, June 25, 2012 5:14 AM To: Discussion of precise voltage measurement Subject: Re: [volt-nuts] 7061 On Board Clock and Battery Here are some pics of the mine, only one battery: http://www.eevblog.com/forum/product-reviews-photos-and-discussion/solartron -7061-help-and-come-photos/msg93650/#msg93650 As for the manual I did try to contact you directly, did you read the message? Fabio. "J. L. Trantham" ha scritto: > My 7061 has a single battery installed, B501, a 3.6 V Ni-MH > Rechargeable 3 pin battery. My 7081 has two batteries installed, the > same 3.6 V Ni-MH Rechargeable battery and a ½ AA Lithium Battery that > serves as the onboard clock backup battery. It is connected with its > negative pin to a 47K resistor to ground and its positive pin to a > diode that feeds a connection that is also fed by another diode from > the main power supply. The common connection of these diodes feed the > clock chip. > > > > On my 7061 there is a location, B101 that appears to be for the same > type ½ AA Lithium Battery. The + pin connects to a diode, in a manner > similar to that described above, and the pin connects to a space > for a resistor, R117, with the other end of the resistor going to > ground. Both the battery, B101, and the resistor, R117, are missing. > > > > My questions are: > > > > 1.Does anyone have a 7061 with this battery and resistor installed? > 2.If so, what is the value of the resistor, R117, and what type is the > battery? > > > > It seems that this would be an easy addition to get a live clock > without the need to restart the clock each time the meter is turned > on. Or, perhaps there is a reason why this in not a good idea. > > > > Thanks in advance. > > > > Joe > > ___ > 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. > This message was sent using IMP, the Internet Messaging Program. ___ 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] 7061 On Board Clock and Battery
Fred, Your 7061 appears to be identical to mine, including the same versions of firmware in the EPROM's. I tried installing a 3 V lithium battery for B101 and a 47K resistor for R117. The current load brought it to about .5 volts. I placed a 'short' across R117 and the voltage rose only to about 1 volt. I hooked my current limited power supply to the points and it drew in excess of 150 mA from 'B101'. At that rate, it would take a two D cell batteries to have any duration of powering the point with the external power off. The high current draw prompted me to abandon any further testing. No harm done though as the meter still works properly. Too bad it does not have battery backup for the clock as does the 7081. Thanks for the pictures. Joe -Original Message- From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] On Behalf Of Fred Schneider Sent: Monday, June 25, 2012 1:13 AM To: Discussion of precise voltage measurement Subject: Re: [volt-nuts] 7061 On Board Clock and Battery http://www.pa4tim.nl/?p=2456 here is a picture of the inside of my 7061. No second battery. Fred PA4TIM Op 25 jun. 2012 om 03:23 heeft "J. L. Trantham" het volgende geschreven: > My 7061 has a single battery installed, B501, a 3.6 V Ni-MH > Rechargeable 3 pin battery. My 7081 has two batteries installed, the > same 3.6 V Ni-MH Rechargeable battery and a ½ AA Lithium Battery that > serves as the onboard clock backup battery. It is connected with its > negative pin to a 47K resistor to ground and its positive pin to a > diode that feeds a connection that is also fed by another diode from > the main power supply. The common connection of these diodes feed the > clock chip. > > > > On my 7061 there is a location, B101 that appears to be for the same > type ½ AA Lithium Battery. The + pin connects to a diode, in a manner > similar to that described above, and the pin connects to a space > for a resistor, R117, with the other end of the resistor going to > ground. Both the battery, B101, and the resistor, R117, are missing. > > > > My questions are: > > > > 1.Does anyone have a 7061 with this battery and resistor installed? > 2.If so, what is the value of the resistor, R117, and what type is the > battery? > > > > It seems that this would be an easy addition to get a live clock > without the need to restart the clock each time the meter is turned > on. Or, perhaps there is a reason why this in not a good idea. > > > > Thanks in advance. > > > > Joe > > ___ > 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. ___ 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] 7061 On Board Clock and Battery
Here are some pics of the mine, only one battery: http://www.eevblog.com/forum/product-reviews-photos-and-discussion/solartron-7061-help-and-come-photos/msg93650/#msg93650 As for the manual I did try to contact you directly, did you read the message? Fabio. "J. L. Trantham" ha scritto: My 7061 has a single battery installed, B501, a 3.6 V Ni-MH Rechargeable 3 pin battery. My 7081 has two batteries installed, the same 3.6 V Ni-MH Rechargeable battery and a ½ AA Lithium Battery that serves as the onboard clock backup battery. It is connected with its negative pin to a 47K resistor to ground and its positive pin to a diode that feeds a connection that is also fed by another diode from the main power supply. The common connection of these diodes feed the clock chip. On my 7061 there is a location, B101 that appears to be for the same type ½ AA Lithium Battery. The + pin connects to a diode, in a manner similar to that described above, and the pin connects to a space for a resistor, R117, with the other end of the resistor going to ground. Both the battery, B101, and the resistor, R117, are missing. My questions are: 1. Does anyone have a 7061 with this battery and resistor installed? 2. If so, what is the value of the resistor, R117, and what type is the battery? It seems that this would be an easy addition to get a live clock without the need to restart the clock each time the meter is turned on. Or, perhaps there is a reason why this in not a good idea. Thanks in advance. Joe ___ 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. This message was sent using IMP, the Internet Messaging Program. ___ 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] 7061 On Board Clock and Battery
http://www.pa4tim.nl/?p=2456 here is a picture of the inside of my 7061. No second battery. Fred PA4TIM Op 25 jun. 2012 om 03:23 heeft "J. L. Trantham" het volgende geschreven: > My 7061 has a single battery installed, B501, a 3.6 V Ni-MH Rechargeable 3 > pin battery. My 7081 has two batteries installed, the same 3.6 V Ni-MH > Rechargeable battery and a ½ AA Lithium Battery that serves as the onboard > clock backup battery. It is connected with its negative pin to a 47K > resistor to ground and its positive pin to a diode that feeds a connection > that is also fed by another diode from the main power supply. The common > connection of these diodes feed the clock chip. > > > > On my 7061 there is a location, B101 that appears to be for the same type ½ > AA Lithium Battery. The + pin connects to a diode, in a manner similar to > that described above, and the – pin connects to a ‘space’ for a resistor, > R117, with the other end of the resistor going to ground. Both the battery, > B101, and the resistor, R117, are missing. > > > > My questions are: > > > > 1.Does anyone have a 7061 with this battery and resistor installed? > 2.If so, what is the value of the resistor, R117, and what type is the > battery? > > > > It seems that this would be an easy addition to get a live clock without the > need to restart the clock each time the meter is turned on. Or, perhaps > there is a reason why this in not a good idea. > > > > Thanks in advance. > > > > Joe > > ___ > 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.
[volt-nuts] 7061 On Board Clock and Battery
My 7061 has a single battery installed, B501, a 3.6 V Ni-MH Rechargeable 3 pin battery. My 7081 has two batteries installed, the same 3.6 V Ni-MH Rechargeable battery and a ½ AA Lithium Battery that serves as the onboard clock backup battery. It is connected with its negative pin to a 47K resistor to ground and its positive pin to a diode that feeds a connection that is also fed by another diode from the main power supply. The common connection of these diodes feed the clock chip. On my 7061 there is a location, B101 that appears to be for the same type ½ AA Lithium Battery. The + pin connects to a diode, in a manner similar to that described above, and the pin connects to a space for a resistor, R117, with the other end of the resistor going to ground. Both the battery, B101, and the resistor, R117, are missing. My questions are: 1. Does anyone have a 7061 with this battery and resistor installed? 2. If so, what is the value of the resistor, R117, and what type is the battery? It seems that this would be an easy addition to get a live clock without the need to restart the clock each time the meter is turned on. Or, perhaps there is a reason why this in not a good idea. Thanks in advance. Joe ___ 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.
