Extech HD200 Operating Manual

User's Guide

Differential Thermometer Datalogger

Model HD200

Introduction

Congratulations on your purchase of the Extech HD200 Differential Thermometer
Datalogger. The HD200 supports differential temperature measurements using dual
Type K thermocouple probe inputs and provides selectable units of °C, °F or °K. The
large backlit LCD displays a versatile combination of readings: T1, T2, T3, T1-T2, T1-T3,
T2-T3, plus MAX-MIN-AVG readings.

The electronic offset feature permits compensation adjustment for thermocouple errors
and to maximize overall accuracy.

The HD200 can also make non-contact temperature measurements with the supplied IR
thermometer probe.

The HD200 datalogger can store 18,000 measurement readings (for each channel) in
the meter’s internal memory. Stored readings can later be transferred to a PC using the
supplied PC USB interface kit. Real-time meter-to-PC logging is also supported.

This meter is shipped fully tested and calibrated and, with proper use, will provide years
of reliable service.

Safety

Please read the safety and operational instructions before using this device.

WARNING

To avoid electrical shock or instrument damage, do not apply voltage exceeding the
maximums specified.

WARNING

To avoid damage or burns, do not make temperature measurement in microwave ovens.

WARNING

Do not use the meter in any explosive atmosphere.

CAUTION

Repeated flexing can break the thermocouple leads. To prolong lead life, avoid sharp
bends in the leads, especially near the connector.

This symbol on the instrument indicates that the operator must refer to an
explanation in this manual.

IR Safety Notes

Double insulation

• Remove the battery if meter is to be stored for longer than 60 days.

• Use extreme caution when the laser pointer beam is on

• Do not point the beam toward anyone's eye or allow the beam to strike the eye from a

reflective surface

• Do not use the laser near explosive gases or in other
potentially explosive areas

2

Model HD200 Version 2.0 December 2007

Description

Meter Description

1. Thermocouple inputs

2. PC USB interface input

3. IR probe input jack

4. Up arrow button

5. SETUP & Display backlight button

6. Down arrow and Record button

7. Temperature units select button

8. MAX-MIN button

9. Display configuration button

10. LCD Display

11. ENTER button

12. Battery compartment & Tripod mount (rear)

13. Display HOLD button

14. Power button

Note: Description of IR sensor contained in later section.

Display Description

1. Thermocouple type (Icon flashes when the
meter is recording)

2. IR temperature (display flashes when the meter
recording)

3. Data Hold mode (readings are frozen on
display)

4. Appears when meter is in the SETUP mode

5. Primary Display: T1, T2, T3 , T1-T2,T1-T3,or
T2-T3 reading.

6. Secondary Display: MAX, MIN, AVG, offset,T1,
T2 , or T3 reading.

7. Temperature unit of measure

8. Third display. Elapsed timer or T1, T2, T3 reading

9. Low battery icon

10. Timer

11. MAX, MIN, AVG display mode icons

3

Model HD200 Version 2.0 December 2007