Author Topic: SIEMENS B1023 (NORMAMETER MP14) from 1987 - Pictures, Teardown, Impressions  (Read 7351 times)

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Offline shakalnokturn

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Re: SIEMENS B1023 (NORMAMETER MP14) from 1987 - Pictures, Teardown, Impressions
« Reply #25 on: September 20, 2022, 12:01:00 am »
Are the scans online anywhere?
 
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Offline Black Phoenix

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Re: SIEMENS B1023 (NORMAMETER MP14) from 1987 - Pictures, Teardown, Impressions
« Reply #26 on: September 20, 2022, 11:07:26 am »
Ohh, I used one of these between 2010 and 2015 in the telecom company. It was the DMM on the emergency kit for the Siemens STP system that sit unused since 1996 in the tool box.

How I regret not had asked to keep it when the old system was teardown. But at the time I had the mentality of a 20s adult that "Newer is better" since I used a Fluke my stuff.

Age really wise people, and make you regret being youth and clueless...
 

Offline Neomys Sapiens

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Re: SIEMENS B1023 (NORMAMETER MP14) from 1987 - Pictures, Teardown, Impressions
« Reply #27 on: September 21, 2022, 02:39:44 am »
I forgot to post a link here.
In THIS post, my Mavo30 did encounter the DMMCheck and it had nothing to fear from it!
https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/msg3971267/#msg3971267
 

Offline reheld

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Are the scans online anywhere?

I‘ve sent him the Scans of his manual, but it seems he doesn‘t published it yet and i do not want to publish it without his permission.

@Cymaphore in case you read this please send me your address, so i can ship the manuals back to you, unfortunately i‘ve lost your address.

It is my hobby to collect and repair those multimeters, my collection already contains the following devices:

Gossen Mavo 10 (including manual)
Gossen Mavo 20 (including manual)
Gossen Mavo 30 (including manual)
Gossen Mavo 40 (including manual)
Siemens B1020
Siemens B1021
Siemens B1023
Grundig DM60 (including manual)
Grundig DM62
Grundig DM64
Norma MP11
Norma MP12 (including manual)
Norma MP14 (including manual)
 

Offline shakalnokturn

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Hopefully he'll want his manuals back and allow the scans to propagate.

You have the schematics can you confirm that it should be possible to read the EEPROM from the 10 pin option header? I'm thinking it may be wise to make a calibration backup, memory is ageing, who still knows how to readjust these meters now....
 

Offline reheld

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The schematic is freely available at the internet, even on this board:
https://www.eevblog.com/forum/testgear/anyone-ever-used-an-old-siemens-b1022-rms-multimeter/msg531868/#msg531868

I have attached the MP13/MP14 schematic from Cymaphores MP14 manual, dumping the EEPROM from the connector should be possible and i assume it is the way the calibration was done at the factory.

Pay attention when trying to repair one of those devices, there were multiple revisions of the main PCB, which can differ in detail from your actual board. For example you can see two fuses at the schematic (SI1 and SI3) there are early revisions which also have a third fuse (SI2 = 4A HRC). If you do not own the manual which was delivered with your device, try to validate which one it is matching, you can also find an other version of the schematic for the old revision which has SI2 fuse.

The connector is also used for connecting the interface module (rare piece of hardware, never seen one in real, only an blurry image on the web). The connector itself is a obsolete part from MOLEX and the pin pattern is rather unusual, the simplest way to dump the EEPROM would be using an IC clip.
 
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