2wire RTD @TMP1200 via VINT

Any hardware type questions or problems for all other Phidget devices.
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haiikun
Fresh meat
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Joined: Thu Dec 27, 2018 6:16 pm
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2wire RTD @TMP1200 via VINT

Post by haiikun »

Hi guys,
my problem seems pretty basic but nethertheless I'm stuck.
I would like to measure a 2wire / 3wire (doesn't matter at the moment) RTD sensor. Therefor I ordered a Hub0000_0 VINT USB Hub & a couple of TMP1200_0 RTD Phidgets

Starting with the two wire method I attached the two cables to RTD+ and RTD- (in my case red + blue, the other blue wire remains unconnected).

First problem:
Trying to setup in the phidget controll panel and adjusting the sensor to 2 wire, every setting remains unsaved.

Second problem
:
I always get the problem "Saturation Detected."


I hope for a pretty obvious and easy solution, as it feels to crazy (I tried mac + win though to cutout this possiblity).


Thank you for every idea / bits and pieces,
haiikun
jdecoux
Labview Developer
Posts: 161
Joined: Mon Nov 13, 2017 10:20 am
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Re: 2wire RTD @TMP1200 via VINT

Post by jdecoux »

1. The control panel example is designed to always open in the default state, as it is intended more as a diagnostic tool to verify the Phidget is working as intended.

2. To get measurements out of the TMP1200 in 2-wire mode, you will need to connect the EXC+ terminal to the RTD+ terminal, and the EXC- terminal to the RTD- terminal for the sensor to measure correctly.

You can check the Wiring Modes section of the TMP1200 User Guide for more informaiton about wiring the RTD.
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