Extech EA15 Operating Manual

User Guide

Thermocouple Datalogging Thermometer

Seven (7) Thermocouple input types K, J, T, E, R, S, N

Dual thermocouple Input with PC Interface

Model EA15

Introduction

Congratulations on your purchase of the Extech Datalogging Thermometer. This device
offers dual thermocouple inputs with manual and automatic datalogging capabilities.
Careful use of this meter will provide years of reliable service.

Specifications

Measurement Ranges K - Type : -200.0oF to +1999.9oF (-150.0oC to +1370.0oC)

J - Type : -200.0

T - Type : -200.0

E - Type : -200.0

R - Type : +32

S - Type : +32

N - Type : -200.0

Resolution J, K, T, E, N Type: 0.1oF/oC/K

R, S Type: 1.0

Accuracy

J, K, T, E, N Type: ±(0.05% reading + 1.5oF (0.75°C)

below -148°F (-100°C): add 0.15% of reading for J, K, E and N;

0.45% of reading for T; ±0.05 of reading +2°F(1°C) for R, S

Temperature Coefficient 0.01% of reading +0.06°F per °F (+0.03 °C) outside the specified

+64°F to 82°F (+18°C to 28°C) range

Below -148°F (-100°C): add 0.04% of reading for J, K, E and N

type; and 0.08% of reading for T type

Note: Temperature accuracy does not include the accuracy of the probe.

Note: The temperature scale is based on the international temperature scale of 1990 (ITS90).

Display Dual Display Multi-function LCD with Backlight

Input Protection 60VDC; 24VAC rms

Measurement Rate 1 time per 1.5 second

Over range indication "OL" appears on the LCD

Open input indication "OL" appears on the LCD

Low battery indication “BT” appears on the LCD

Manual Memory Capacity 98 sets

Datalogging Memory Capacity 8800 sets

Power supply 6 ‘AAA’ Batteries

Battery life Approximately 200 hours with alkaline batteries

Operating Temperature 32 to 122

Operating Humidity < 80% RH

Storage Temperature 14 to 140

Storage Humidity 10 to 80% RH

Dimensions 5.91 x 2.8 x 1.4" (150 x 72 x 35mm)

Weight Approx. 8.29 oz. (235g) with batteries

o

F to +1994.0oF (-150.0oC to +1090.0oC)

o

F to +752.0oF (-150.0oC to +400.0oC)

o

F to +1598.0oF (-150.0oC to +870.0oC)

o

F to +1999.9oF (0.0oC to +1767.0oC)

o

F to +1999.9oF (0.0oC to +1767.0oC)

o

F to +1999.9oF (-150.0oC to +1300.0oC)

oF/o

C/K (0.1° for reference only)

o

F (0 to 50oC)

o

F (-10 to 60oC)

2

Model EA15 Version 1.5 9/03

Meter Description

1. RS-232 and thermocouple input jacks

2. LCD display

3. Power, Data Hold, and Backlight buttons

4. Max/Min, display select, and units buttons

5. MEM, input TYPE, and READ buttons

6. SET button

7. Battery compartment (rear)

8. Up/Down scroll button

9. Enter Button

Operation

Connecting thermocouples

1. This meter accepts two thermocouples with spade plugs (sub-miniature type with one
spade wider than the other).

2. Plug the thermocouple(s) into the meter's T1 and/or T2 thermocouple input jack(s).

3. Always check LCD display for the proper thermocouple type selection..

Turn Power ON

Press the button to turn power on. The meter will perform a short self-test. If a
thermocouple is not plugged into the selected input or if the thermocouple is "open", the
display will show "- - - - -". The default thermocouple type, units and display is determined
from the parameters selected when the meter was last used.

Selecting thermocouple type

Press the TYPE button to select the type of thermocouple being used.

Selecting °C, °F or °K units of measure

Press the C/F/K button to select the unit of measure.

Selecting T1, T2, and T1-T2 Displays

Press the T1 T2 T1-T2 button to step through and select from the following displays:
a. T1 (thermocouple 1) primary display and T2 (thermocouple 2) lower display.
b. T2 primary display and T1 lower display
c. (T1-T2) (difference between T1 and T2) primary display and T1 lower display
d. (T1-T2)primary display and T2 lower display

Notes:

• To avoid electrical shock or personal injury, do not apply more than 20Vrms, between

the thermocouples, or between any thermocouple and earth ground.

• If voltage on the measurement surface results in potentials of more than 1V,

measurement errors may occur.

• If a potential exists between the thermocouples, use electrically insulated

thermocouples.

1

2

3

4

5

6

T1

T2

INTERVAL

T1

min: se c
hour:min

T2

TYPE

KJTERSN

MX AVG-MN

7 8 9

C
F
K

3

Model EA15 Version 1.5 9/03