×
Follow Us
Page 1 of 2 12 LastLast
Results 1 to 10 of 11

Doble M4000 Temp Sensor Help

 Jump to latest post
Page 1 of 2 12 LastLast
    #1
  1. SecondGen's Avatar
    SecondGen is offline
    I push buttons.
    NETA Level III Pro Subscriber
    Join Date
    Jan 2014
    Location
    United States
    Posts
    508
    Reputation

    Doble M4000 Temp Sensor Help

    Looking to repair our M4000 temp/humidity sensor cable, can anyone help with the pinouts? Connector pins are labeled 1-4, need to know which color goes to which pin.

    Click image for larger version. 

Name:	doble-m4000-temp-sensor-wire.jpg 
Views:	1 
Size:	177.0 KB 
ID:	493

  2. #2
  3. gchoquette is offline Junior Member Pro Subscriber
    Join Date
    Mar 2019
    Posts
    22
    Reputation

    Internal components are very cheap to replace

    Quote Originally Posted by SecondGen View Post
    Looking to repair our M4000 temp/humidity sensor cable, can anyone help with the pinouts? Connector pins are labeled 1-4, need to know which color goes to which pin.

    Click image for larger version. 

Name:	doble-m4000-temp-sensor-wire.jpg 
Views:	1 
Size:	177.0 KB 
ID:	493
    Hi, I don't remember the pinouts, but if ever the unit goes bad, it's usually either the thermistor or the humidity sensor. Doble (if I remember well) sells replacements for around $1,600 and the thermistor is $1.00 and the humidity sensor is around $10. There's a part number on the humidity sensor and that's the one that usually goes bad. The thermistor does not have a part number, but I figured it out my measuring it's resistance at two temperatures and found some with matching specs.

    The sensor communicates with the main unit serially, so you won't damage anything by just trying several of possible combinations.

    Good luck.

  4. #3
  5. Join Date
    Dec 2017
    Posts
    32
    Reputation

    Probe pin out

    Quote Originally Posted by gchoquette View Post
    Hi, I don't remember the pinouts, but if ever the unit goes bad, it's usually either the thermistor or the humidity sensor. Doble (if I remember well) sells replacements for around $1,600 and the thermistor is $1.00 and the humidity sensor is around $10. There's a part number on the humidity sensor and that's the one that usually goes bad. The thermistor does not have a part number, but I figured it out my measuring it's resistance at two temperatures and found some with matching specs.

    The sensor communicates with the main unit serially, so you won't damage anything by just trying several of possible combinations.

    Good luck.
    If I recall I believe it looks like this!
    Click image for larger version. 

Name:	M4000_TempHumidity_Sensor.png 
Views:	40 
Size:	9.7 KB 
ID:	494

  6. #4
  7. rofo42 is offline Seasoned Member
    Join Date
    Apr 2018
    Posts
    65
    Reputation
    Quote Originally Posted by SecondGen View Post
    Looking to repair our M4000 temp/humidity sensor cable, can anyone help with the pinouts? Connector pins are labeled 1-4, need to know which color goes to which pin.

    Click image for larger version. 

Name:	doble-m4000-temp-sensor-wire.jpg 
Views:	1 
Size:	177.0 KB 
ID:	493
    Just checked my test set for you.

    Red > 1
    Silver > 2
    Black > 3
    Green > 4

  8. #5
  9. Join Date
    Dec 2017
    Posts
    32
    Reputation
    Quote Originally Posted by rofo42 View Post
    Just checked my test set for you.

    Red > 1
    Silver > 2
    Black > 3
    Green > 4
    was 5 a shield ?

  10. #6
  11. SecondGen's Avatar
    SecondGen is offline
    I push buttons.
    NETA Level III Pro Subscriber
    Join Date
    Jan 2014
    Location
    United States
    Posts
    508
    Reputation
    Thanks for all of the responses, hopefully its just the cable and I can find some time by end of the week to get this thing fixed. Looks like the terminals on the connector are really small, its going to be a trick to solder.

  12. #7
  13. rofo42 is offline Seasoned Member
    Join Date
    Apr 2018
    Posts
    65
    Reputation
    Quote Originally Posted by SecondGen View Post
    Thanks for all of the responses, hopefully its just the cable and I can find some time by end of the week to get this thing fixed. Looks like the terminals on the connector are really small, its going to be a trick to solder.
    Those devices go bad quite often from what I have seen. I hate to say it, but the cable is probably not the issue. Just saw a bad weather sensor last week, actually.

  14. #8
  15. Kalbi_Rob's Avatar
    Kalbi_Rob is offline Experienced Member Pro Subscriber
    Join Date
    Feb 2018
    Location
    Jacksonville, NC
    Posts
    290
    Reputation
    Quote Originally Posted by SecondGen View Post
    Thanks for all of the responses, hopefully its just the cable and I can find some time by end of the week to get this thing fixed. Looks like the terminals on the connector are really small, its going to be a trick to solder.
    In the meantime,
    If you didn't already figure it out, you can bypass the temperature sensor in the DTA settings. We had a tech leave it on a transformer thru a week of thunderstorms and had to have it replaced (sitting full of water destroyed it), but we found out he left it when we went to use it and it was missing.
    Luckily, I always carry a cWheap temperature/humidity gauge I bought at Home Depot to use to input manually into DTA.

  16. #9
  17. SecondGen's Avatar
    SecondGen is offline
    I push buttons.
    NETA Level III Pro Subscriber
    Join Date
    Jan 2014
    Location
    United States
    Posts
    508
    Reputation
    Quote Originally Posted by gchoquette View Post
    Hi, I don't remember the pinouts, but if ever the unit goes bad, it's usually either the thermistor or the humidity sensor. Doble (if I remember well) sells replacements for around $1,600 and the thermistor is $1.00 and the humidity sensor is around $10. There's a part number on the humidity sensor and that's the one that usually goes bad. The thermistor does not have a part number, but I figured it out my measuring it's resistance at two temperatures and found some with matching specs.

    The sensor communicates with the main unit serially, so you won't damage anything by just trying several of possible combinations.

    Good luck.
    So, we tried the pinouts suggested in the thread and now the sensor gives us crazy high temperature (200C) and no humidity. Either we got the pinouts wrong or the sensor is bad. I need to get my hands on another cable to be sure but next step would be replacing the sensors.

  18. #10
  19. SecondGen's Avatar
    SecondGen is offline
    I push buttons.
    NETA Level III Pro Subscriber
    Join Date
    Jan 2014
    Location
    United States
    Posts
    508
    Reputation
    Quote Originally Posted by Kalbi_Rob View Post
    In the meantime,
    If you didn't already figure it out, you can bypass the temperature sensor in the DTA settings. We had a tech leave it on a transformer thru a week of thunderstorms and had to have it replaced (sitting full of water destroyed it), but we found out he left it when we went to use it and it was missing.
    Luckily, I always carry a cWheap temperature/humidity gauge I bought at Home Depot to use to input manually into DTA.
    Thanks Rob. We've been bypassing the sensor in DTA for quite sometime now and also use external meters but I thought it would be nice to get this thing working after an easy fix - so far no luck.

Page 1 of 2 12 LastLast
Subscribe

Share this thread

Related Topics

  1. Doble Testing a Bushing: C2 reading higher than nameplate
    By Bob_Woodward in forum Electrical Testing Talk
    Replies: 12
    Last Post: July 21, 2022, 04:45 PM
  2. Doble Protection Suite F6150e Setting
    By ACOUNDOUL in forum P&C / Relay Testing Talk
    Replies: 5
    Last Post: March 4, 2020, 09:24 AM
  3. Doble Protection Suite F6150e Prefault Voltage, Current, Angle
    By ACOUNDOUL in forum P&C / Relay Testing Talk
    Replies: 2
    Last Post: February 21, 2020, 11:02 AM

Tags for this Thread

Follow us


Explore TestGuy


NETA Certification Training


NICET Electrical Power Testing


Help and Support




You are viewing the archives. Enjoy new features and join the conversation at wiki.testguy.net