407907 Datasheet, PDF (4/4 Pages) Extech Instruments Corporation. – RTD Thermometer

Data Hold
To freeze a reading on the LCD, press the HOLD button. Temperature readings require
several seconds to stabilize, therefore use Data Hold only after a reading has fully
stabilized. Press the HOLD button again to return the meter to normal operation.
RS-232 PC Interface
The meter includes a built-in RS232 serial data port. This interface was designed for use
with the Extech Data Acquisition Software (Extech Part Number 407001) and enables the
user to store readings on a PC. For more information, contact Extech or refer to the
manual accompanying the software for details.
Battery Replacement
The low battery indicator (battery symbol) appears on the LCD when the 9V battery needs
replacing. Reliable readings can be obtained for several hours after the first appearance of
the low battery indicator. To replace the battery:
1. Remove the meter’s rubber protective holster.
2. Remove the battery compartment cover (back of meter) using a small coin or
screwdriver.
3. Replace the 9V battery (heavy duty, alkaline type) and reinstall the cover.
4. Replace the rubber holster.
4-wire RTD input pin-out
Top View
100Ω
Calibration and Repair Services
Extech offers complete repair and calibration services for all of the products we sell.
For periodic calibration, NIST certification or repair of any Extech product, call customer
service for details on services available. Extech recommends that calibration be performed
on an annual basis to insure calibration integrity.

Support line [phone]
Technical support: Extension 200; E-mail: [e-mail]
Repair & Returns: Extension 210; E-mail: [e-mail]
Product specifications subject to change without notice
For the latest version of this User’s Guide, Software updates, and other
up-to-the-minute product information, visit our website: www.extech.com
Extech Instruments Corporation, 285 Bear Hill Rd., Waltham, MA 02451
Copyright © 2006 Extech Instruments Corporation.
All rights reserved including the right of reproduction in whole or in part in any form.
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Model 407907 V 1.3 01/06