Products for USB Sensing and Control
Products for USB Sensing and Control

PHIDGETS Inc.

Unit 1 - 6115 4 St SE
Calgary AB  T2H 2H9
Canada
+1 403 282-7335

RTD Phidget

ID: TMP1200_0
Recommended for new designs: This product (or a similar replacement with a compatible form, fit and function) is estimated to be available for ten years or more.

Measure RTDs, thermistors, and other resistance-based sensors with this VINT port adapter.

$30.00

Quantity Available: 678

Qty Price
5 $28.50
10 $27.00
25 $24.00
50 $21.00
100 $19.50
250 $18.00
500 $16.50
1000 $15.00

The TMP1200 allows you to precisely measure temperature using RTDs, thermistors, and other resistance-based sensors. A resistance temperature detector measures subtle temperature changes using a resistance of the element made of a pure metal (usually platinum). The resistance value will change in a precise and repeatable way. The RTD Phidget measures these subtle resistance changes, so you can get the most accurate temperature measurements. This Phidget connects to your computer through a VINT Hub.

Features:

  • Connect one resistance temperature detector (RTD)
  • Select the number of wires (2, 3, or 4) and the RTD type via software
  • The adapter does all the math - sampled temperature in degrees Celsius.
  • Read thermistors and other resistive sensors - receive the data in ohms

VINT Hubs

This Phidget is a smart device that must be controlled by a VINT Hub. For more information about VINT, have a look at the VINT Primer. You can use a Phidget Cable to simply and easily connect the two devices. Here's a list of all of the different VINT Hubs currently available:

Product Board
Image Part Number Price Number of VINT Ports Controlled By
HUB0000_0 $30.00 6 USB (Mini-USB)
HUB5000_0 $60.00 6 Local Network (Ethernet or Wi-Fi)
SBC3003_0 $120.00 6

RTDs

Here's a list of RTDs you can use with the TMP1200:

Product
Image Part Number Price
TMP4109_0 $40.00
TMP4110_0 $40.00

Phidget Cables

Use a Phidget cable to connect this device to the hub. You can solder multiple cables together in order to make even longer Phidget cables, but you should be aware of the effects of having long wires in your system.

Product Physical Properties
Image Part Number Price Cable Length
3002_0 $2.00 600 mm
3003_0 $1.50 100 mm
3004_0 $3.00 3.5 m
3034_0 $1.50 150 mm
3038_0 $2.25 1.2 m
3039_0 $2.75 1.8 m
CBL4104_0 $1.75 300 mm
CBL4105_0 $2.00 900 mm
CBL4106_0 $2.50 1.5 m


Part 1: Setup

Welcome to the TMP1200 user guide! In order to get started, make sure you have the following hardware on hand:

Next, you will need to connect the pieces:

TMP1200-functional.jpg
  1. Connect the TMP1200 to the VINT Hub using the Phidget cable.
  2. Connect the RTD to the Phidget. See the technical section for more information.
  3. Connect the VINT Hub to your computer with a USB cable.


Phidget Control Panel

In order to demonstrate the functionality of the TMP1200, the Phidget Control Panel running on a Windows machine will be used.


The Phidget Control Panel is available for use on both macOS and Windows machines.

Windows

To open the Phidget Control Panel on Windows, find the Ph.jpg icon in the taskbar. If it is not there, open up the start menu and search for Phidget Control Panel

Windows PhidgetTaskbar.PNG

macOS

To open the Phidget Control Panel on macOS, open Finder and navigate to the Phidget Control Panel in the Applications list. Double click on the Ph.jpg icon to bring up the Phidget Control Panel.


For more information, take a look at the getting started guide for your operating system:


Linux users can follow the getting started with Linux guide and continue reading here for more information about the TMP1200.

First Look

After plugging the TMP1200 into your computer and opening the Phidget Control Panel, you will see something like this:

TMP1200 Panel.jpg


The Phidget Control Panel will list all connected Phidgets and associated objects, as well as the following information:

  • Serial number: allows you to differentiate between similar Phidgets.
  • Channel: allows you to differentiate between similar objects on a Phidget.
  • Version number: corresponds to the firmware version your Phidget is running. If your Phidget is listed in red, your firmware is out of date. Update the firmware by double-clicking the entry.


The Phidget Control Panel can also be used to test your device. Double-clicking on an object will open an example.

Part 2: Using Your Phidget

About

The TMP1200 allows you to precisely measure temperature using RTDs, thermistors, and other resistance-based sensors. Measure temperature from your RTD in degrees Celsius by selecting the RTD type and the number of wires in the software. You can also read thermistors and other resistive sensors by using the resistance sensor object in your program. You'll receive the data in ohms and can convert to the desired unit by using the formula in your sensor's datasheet. You could even use it as a simple ohmmeter for resistances up to 19 kΩ.

Explore Your Phidget Channels Using The Control Panel

You can use your Control Panel to explore your Phidget's channels.

1. Open your Control Panel, and you will find the following channels:

TMP1200 Panel.jpg

2. Double click on a channel to open an example program. Each channel belongs to a different channel class:

Resistance Input: Measures the raw resistance of the RTD probe

In your Control Panel, double click on "Resistance Input":

TMP1200-ResistanceInput.jpg
RTD Input: Reports the temperature of the RTD probe

In your Control Panel, double click on "RTD Input":

TMP1200-TemperatureSensor.jpg

Part 3: Create your Program

1. Setting up your Programming Environment

2. Phidget Programming Basics

Part 4: Advanced Topics and Troubleshooting

How do I know what channel, serial number, or hub port to use in my program?

Before you open a Phidget channel in your program, you can set these properties to specify which channel to open. You can find this information through the Control Panel.

1. Open the Control Panel and double-click on the red map pin icon:

The locate Phidget button is found in the device information box

2. The Addressing Information window will open. Here you will find all the information you need to address your Phidget in your program.

All the information you need to address your Phidget


See the Phidget22 API for your language to determine exact syntax for each property.

Setting the Change Trigger and Data Interval

The Change Trigger is the minimum change in the sensor data needed to trigger a new data event. The Data Interval is the time (in ms) between data events sent out from your Phidget. You can modify one or both of these values to achieve different data outputs. You can learn more about these two properties here.

Wiring Instructions

Two-Wire Mode

This is the simplest wiring setup for an RTD, but also the least accurate because the resistance of the leads are not taken into account. To connect a 2-wire RTD to the RTD Phidget, connect one wire to the RTD+ terminal, and the other to the RTD- terminal. Then connect the EXC+ terminal to the RTD+ terminal and the EXC- to the RTD- terminal with two short wires.

In your program, set RTDWireSetup to 2-wire mode. In the Phidget22 API select the TMP1200 and your programming language of choice to see exact naming conventions.

Three-Wire Mode

In a three-wire RTD, the extra wire is added to measure the resistance of one of the leads. This calculation assumes that both leads have the same resistance. Your RTD should have two wires that share a color; connect one of these wires to the RTD- terminal and the other to the EXC- terminal. The differently colored wire connects to the RTD+ terminal. Then connect the EXC+ terminal to the RTD+ terminal with a short wire.

In your program, set RTDWireSetup to 3-wire mode. In the Phidget22 API select the TMP1200 and your programming language of choice to see exact naming conventions.

Four-Wire Mode

A four-wire RTD is normally used in precision measurement, when the assumption that both leads have the same resistance is not accurate enough. Unfortunately the RTD Phidget does not support this particular feature of four-wire RTDs. It does support the use of four-wire RTDs using the same assumption as three-wire mode. To connect a four-wire RTD, simply connect one pair of same-colored wires to the RTD+ and EXC+ terminals, and the other pair to the RTD- and EXC- terminals.

In your program, set RTDWireSetup to 4-wire mode. In the Phidget22 API select the TMP1200 and your programming language of choice to see exact naming conventions.


Line Resistance Measurement

In three and four wire modes, this device will measure the line resistance every 5 minutes. This measurement will cause a delay in measurement for data intervals of less than 500ms. To force the line resistance to be recalculated, you must close and re-open the device.

Product Specifications

Board Properties
Controlled By VINT
Resistance Input
Maximum Measurable Resistance 50 kΩ
RTD Input
Temperature Error Max 0.2 °C
RTD Current Max 62 μA
Sampling Interval Min 250 ms/sample
Sampling Interval Max 60 s/sample
Electrical Properties
Current Consumption Min * 17 μA
Current Consumption Max * 4 mA
Physical Properties
Recommended Wire Size 16 - 26 AWG
Operating Temperature Min -40 °C
Operating Temperature Max 85 °C
Customs Information
Canadian HS Export Code 8471.80.00
American HTS Import Code 8471.80.40.00
Country of Origin CN (China)

* - Current consumption varies depending on selected data interval. See the graph below for details.

Current

Documents

Product History

Date Board Revision Device Version Comment
August 2017 0 104 Product Release
January 2018 0 105 Increased maximum change trigger
January 2018 0 106 Library bug fixes
March 2020 0 107 Fixed bug where wire resistance could be NaN
April 2020 0 108 Fixed equations. Added internal calibration (only for new TMP1200)

Software Objects

Channel NameAPIChannel
RTD input TemperatureSensor 0
Resistance Input ResistanceInput 0

API


Back Forward
Print this API

Code Samples



Example Options


Downloads

				Make your selections to display sample code.
					

Code Samples

Language:

APIDetailLanguageOS
TemperatureSensor Visual Studio GUI C# Windows Download
TemperatureSensor Java Android Download
TemperatureSensor JavaScript Browser Download
TemperatureSensor Objective-C macOS Download
TemperatureSensor Swift macOS Download
TemperatureSensor Swift iOS Download
TemperatureSensor Visual Basic .NET Windows Download
TemperatureSensor Max/MSP Multiple Download
ResistanceInput Visual Studio GUI C# Windows Download
ResistanceInput Java Android Download
ResistanceInput JavaScript Browser Download
ResistanceInput Objective-C macOS Download
ResistanceInput Swift macOS Download
ResistanceInput Swift iOS Download
ResistanceInput Visual Basic .NET Windows Download
ResistanceInput Max/MSP Multiple Download