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 Product User Guide  |  2

RTDTemp101A

PRODUCT USER GUIDE

Product Overview

Don’t be fooled by the small size, the RTDTemp101A 
temperature data logger offers a wealth of features with 
a compact form factor about the size of a matchbox. 
When used with an external RTD probe, this data logger 
measures temperatures from -200 °C to 850 °C (-328 °F to 
+1562 °F).
The low power design of this data logger provides a 
battery life of up to 10 years but still delivers ultra-fast 
download speeds. The RTDTemp101A can store over 
a million readings and offers a software configurable 
memory wrap option. In addition to having a pushbutton 
start stop, the device also can be programmed to a delay 
start up to 18 months in advance.

Installation Guide

Installing the Interface Cable

IFC200 (sold separately) 

— 

Insert the device into a USB 

port. The drivers will install automatically.

Installing the Software

The Software can be downloaded from the MadgeTech 
website a

madgetech.com

. Follow the instructions 

provided in the Installation Wizard. Compatible with 
Standard Software version 2.03.06 or later and Secure 
Software version 4.1.3.0 or later.

KEY

1 - Ref +

2 - Measurement (-) Input 

3 - Measurement (+) Input 

4 - Excitation Current Out (+)

1 - Black or Short to 2 

2 - Black

3 - Red

4 - Red or Short to 3

Wiring the Data Logger

Wiring Options

For 4-wire RTD probes, connect the four lead wires to your RTD logger as shown in 
the figure.
For 3-wire RTD probes, short inputs 3 and 4 together, then connect the lead wires 
to inputs 1, 2 and 3.
For 2-wire RTD probes, short inputs 3 and 4 together and inputs 1 and 2 together, 
then connect the RTD lead wires to inputs 2 and 3.

Warning:

 Note the polarity instructions. Do not attach wires to the wrong terminals.

100 Ω, 2 or 4 wire RTD probes are recommended for the most accurate 
performance. Most 100 Ω, 3 wire RTD probes will work, but MadgeTech cannot 
guarantee the accuracy. To determine whether or not the 3-wire RTD probe will 
work, the resistance between the two same colored wires should be less than 1 Ω. 

Note:

 Please contact the manufacturer of the RTD probe for questions on the resistance

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