!!

Welcome to our Forum, extension and content sharing platform of Electrical Test and Measurement Product Reviews Blog.

 
Registration this is Free, we accept contributors of 17 years old and above. We do not accept registration with Gmail

Active since 7 June 2012  


Copyright Notice: Entire ITTSB.EU content & images they are copyright protected. - Forum search engine disabled to Guests - No need of you using Adblock software.

Author Topic: Siemens (Thomson) M273-A1 Kelvin measuring wiring tester (milliohm meter)  (Read 3879 times)

0 Members and 1 Guest are viewing this topic.

Online Kiriakos GR

  • Administrator
  • Hero Member
  • *****
  • Join Date: May 2012
  • Location: Greece
  • Posts: 2203
  • Country: gr
    • ittsb.eu
  • job title: Industrial Maintenance Electrician
This topic it is relative to Siemens (Thomson)  M273-A1 that is analog measuring  Low-Resistance device of 1983.

Siemens (Thomson) M273-A1 this is actually a resistors bridge this also using Thomson test leads connection which this is no other than more known Kelvin clips (four wires measurement).
This has three measuring ranges,  single knob at this device this is mechanical ranges selector, among push button (test start) and also this push button unlocks range selector when we need to move- up or to a lower range.

Accuracy specification this is 1.5% for it first measuring range that is from 200 micro-ohm up to 2.2 milliohm.
Other four higher ranges they are at 1% and measuring unit this is milliohm. 
2... 22 mΩ
20... 220 mΩ
200... 2200 mΩ

Specific made by Siemens meter, this using internal constant current source (circuit) so to inject DC current of 2A in to the test circuit.
This is a very high current which is designed to be used exclusively for wiring testing.
 
Practically Siemens (Thomson) M273-A1 this is first portable wiring testing meter which designed to serve in the application of troubleshooting telephone wiring connections at 1980 ~ 1990.

Picture of original test leads harness this is impossible to be found.
But even so,  my very own composed Kelvin clips to banana plug (test leads harness), this is not far away from what you do need as test leads for one M273-A1.

https://www.ittsb.eu/forum/index.php?topic=1314.0
WWW.ITTSB.EU   Industrial Test Tools Scoreboard  (Product Reviews Blog) / Editor in Chief.
The content of this Web site is copyright protected

Online Kiriakos GR

  • Administrator
  • Hero Member
  • *****
  • Join Date: May 2012
  • Location: Greece
  • Posts: 2203
  • Country: gr
    • ittsb.eu
  • job title: Industrial Maintenance Electrician
Siemens (Thomson) M273-A1  original stock pictures from Volos-Greece  8) 
This meter belongs to a friend of my and by the use of my Galaxy S5  I did take some good pictures for the readers of ITTSB Blog.  ;)
 
WWW.ITTSB.EU   Industrial Test Tools Scoreboard  (Product Reviews Blog) / Editor in Chief.
The content of this Web site is copyright protected

 

ITTSB.EU Blog

General Data Protection Regulation GDPR ITTSB.EU Home Page Reward us by a Donation - Sponsorship TsDMMViewer Data Logger for FLUKE 884xA

ITTSB Blog - Sponsors

protosnet.com - Internet solutions FLUKE benchtop DMM Repair Services

Recommended Links

Hellenic Accreditation System E.SY.D. Portal of city Volos - Greece Clean Up and Customize Facebook Firefox Backup Tool 32bit / 64 bit Winaero Tweaker = Win7 Fonts size fix