DIGITAL THERMOCOUPLE
THERMOMETERS
USER’S MANUAL
DT80-1 and DT80-2
Please read this manual carefully and thoroughly before using this product.
Single
Thermocouple
Dual
Thermocouple
2
TABLE OF CONTENTS
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . 5
Display Elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Function Keys Overview . . . . . . . . . . . . . . . . . . . . . . . 7
Specific Operating Instructions . . . . . . . . . . . . . . 8 –9
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 10 – 11
Maintenance & Troubleshooting . . . . . . . . . . . . . . . . 11
Replacing the Battery . . . . . . . . . . . . . . . . . . . . . . . . 11
Routine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . 11
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . 12
Return Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
INTRODUCTION
Thank you for purchasing a Thermocouple type J/K
digital thermometer from General Tools & Instruments.
We suggest that you read this user’s manual carefully
and thoroughly before using the instrument.
The DT80-1 and DT80-2 are thermocouple-type J/K
digital thermometers. The DT80-1 is designed to be used
with a single thermocouple; the DT80-2 is designed to be
fed by two thermocouples configured to deliver a
temperature differential.
Each model uses a high-resolution analog-to-digital
converter chip and a microprocessor to convert input
temperature signals to digital form and display them on
a dual-display, 5-digit black-and-white liquid crystal
display measuring 1.5 by 1.5 inches.
These two thermocouple thermometers have a
measurement accuracy of ±(0.05% of reading + 1.4°F)
with an unmatched measurement range. For example,
the DT80-1 and DT80-2 can measure and read out
temperatures from -328° to 1922°F (-200° to 1050°C)
using a J-type thermocouple, and temperatures from
-328° to 2498°F (-200° to 1370°C) using a K-type
thermocouple. This very wide measuring range, plus a fast
response time make these thermocouple thermometers
suitable for a wide range of commercial and industrial
applications requiring measurement of very high and low
temperatures. Examples include applications in the food
and chemical processing industries, HVAC (heating,
ventilation and air-conditioning), power generation, and
paper production.
3
Simplicity is another asset of thermocouple
thermometers. Thermocouples work by measuring the
potential difference produced at the junction of two wires
made of different metals but exposed to the same
temperature. Since the junction is very small, a
thermocouple thermometer can be used to measure the
temperature at a point reachable by a probe. The probes
used are inexpensive and easily replaceable.
KEY FEATURES
• Dual 5-digit liquid-crystal display
• Measurement range: -328° to 1922°F
(-200° to 1050°C) using a J-type thermocouple;
-328° to 2498°F (-200° to 1370°C)
using a K-type thermocouple
• Measurement accuracy:
±(0.05% of reading +1.4°F)
• Operating temperature range:
40° to 104°F (5° to 40°C)
• Power Source: 1 “9V” battery
4
OPERATING INSTRUCTIONS
Familiarize yourself with the nomenclature in the
following two illustrations before using the DT80-1 or
DT80-2.
BACK, FRONT AND TOP VIEWS
Thermocouple T1 input
Thermocouple T2 input (DT80-2 only)
Display (see next illustration)
Function keys
Battery cover
Battery compartment
5
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