Author Topic: ISO Test analyzer  (Read 865 times)

0 Members and 1 Guest are viewing this topic.

Offline fantTopic starter

  • Contributor
  • Posts: 43
  • Country: it
ISO Test analyzer
« on: October 09, 2022, 04:30:46 pm »
I have an HT M70 isotest.
On the low ohm range the reading is changing reading by reading, with the probes shorted once it indicates 5,38 Ohm, the following 15,87 Ohm, the third 4,77 and so on.
Changed the four relays inside ( they select the range and function ) but no improvement.
Anybody has schematics or service manual.
I have the user manual but no help.

Thank you in advance
 

Offline AVGresponding

  • Super Contributor
  • ***
  • Posts: 4928
  • Country: england
  • Exploring Rabbit Holes Since The 1970s
Re: ISO Test analyzer
« Reply #1 on: October 10, 2022, 04:00:04 pm »
Have you tried swapping the leads? It's not unusual for them to go bad over time, even good quality silicone ones.
nuqDaq yuch Dapol?
Addiction count: Agilent-AVO-BlackStar-Brymen-Chauvin Arnoux-Fluke-GenRad-Hameg-HP-Keithley-IsoTech-Mastech-Megger-Metrix-Micronta-Racal-RFL-Siglent-Solartron-Tektronix-Thurlby-Time Electronics-TTi-UniT
 

Offline fantTopic starter

  • Contributor
  • Posts: 43
  • Country: it
Re: ISO Test analyzer
« Reply #2 on: October 11, 2022, 10:16:38 pm »
done everything is possible, changed terminals, cleaned the PCB with HPA, changed the relays, made some new soldering where solder is matt, checked some voltages, everything is OK, but it is not working.
For this reason I need the schematics and/or service manual.

Thanks in advance
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf