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Extech Instruments EA15 User Manual

Extech Instruments EA15
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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.

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Extech Instruments EA15 Specifications

General IconGeneral
DisplayLCD
Power Source9V Battery
Response Time500 ms
Optical Resolution8:1
Operating Humidity10 to 90% RH
TypeInfrared Thermometer
Temperature Range (Type K)-50°C to 1370°C
Temperature Range (Infrared)-4 to 572°F (-20 to 300°C)
Accuracy (Type K)±1.8°F (±1°C)
Accuracy (Infrared)±2% of reading or ±2°C (±3.6°F)
Resolution0.1°F/°C
IR Resolution0.1°F/°C
EmissivityAdjustable 0.10 to 1.00
Operating Temperature32 to 122°F (0 to 50°C)
Dimensions38 mm
Weight0.4 kg (0.88 lb)

Summary

Introduction

Specifications

Measurement Ranges

Specifies the operating temperature ranges for different thermocouple types (K, J, T, E, R, S, N).

Resolution

Defines the measurement resolution for various thermocouple types, including specific values for R, S types.

Accuracy

Details the accuracy specifications for different thermocouple types, including percentage of reading and fixed offsets.

Temperature Coefficient

Outlines the temperature coefficient effects on accuracy outside specified ranges, with different values for types.

Display

Describes the display type: Dual Display Multi-function LCD with Backlight.

Input Protection

Specifies the input protection limits: 60VDC; 24VAC rms.

Measurement Rate

Indicates the measurement rate: 1 time per 1.5 second.

Over range indication

Describes the LCD indication for over range: 'OL' appears on the LCD.

Open input indication

Describes the LCD indication for an open input: 'OL' appears on the LCD.

Low battery indication

Describes the LCD indication for low battery: 'BT' appears on the LCD.

Manual Memory Capacity

States the manual memory capacity: 98 sets.

Datalogging Memory Capacity

States the datalogging memory capacity: 8800 sets.

Power supply

Specifies the power supply: 6 'AAA' Batteries.

Battery life

Estimates the battery life: Approximately 200 hours with alkaline batteries.

Operating Temperature

Specifies the operating temperature range: 32 to 122°F (0 to 50°C).

Operating Humidity

Specifies the operating humidity range: < 80% RH.

Storage Temperature

Specifies the storage temperature range: 14 to 140°F (-10 to 60°C).

Storage Humidity

Specifies the storage humidity range: 10 to 80% RH.

Dimensions

Provides the physical dimensions: 5.91 x 2.8 x 1.4" (150 x 72 x 35mm).

Weight

States the weight: Approx. 8.29 oz. (235g) with batteries.

Meter Description

RS-232 and thermocouple input jacks

Describes the connection points for RS-232 and the two thermocouple inputs (T1, T2).

LCD display

Refers to the Dual Display Multi-function LCD screen.

Power, Data Hold, and Backlight buttons

Details the function of the Power, Data Hold, and Backlight control buttons.

Max/Min, display select, and units buttons

Explains the controls for Max/Min recording, display selection, and unit changes (C/F/K).

MEM, input TYPE, and READ buttons

Describes the buttons for memory operations, thermocouple type selection, and reading stored data.

SET button

Identifies the SET button, used for programming intervals and other settings.

Battery compartment (rear)

Locates the battery compartment on the rear of the meter.

Up/Down scroll button

Describes the scroll buttons used for navigating menus and data.

Enter Button

Identifies the Enter button for confirming selections.

Operation

Connecting thermocouples

Guides on how to connect two thermocouples with spade plugs into the meter's input jacks.

Turn Power ON

Explains the procedure to turn the meter on and the initial self-test sequence.

Selecting thermocouple type

Details the process of selecting the correct thermocouple type using the TYPE button.

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

Describes how to switch between Celsius, Fahrenheit, and Kelvin units using the C/F/K button.

Selecting T1, T2, and T1-T2 Displays

Explains how to cycle through different display modes for T1, T2, and their difference (T1-T2).

Data Hold

Explains how to freeze the displayed reading using the HOLD button, indicated by the 'H' icon.

MIN, MAX, AVG Recording Function with Timer

Details how to capture Minimum, Maximum, and Average temperature values with an elapsed time clock.

Backlight

Explains how to turn the LCD display backlight on and off, noting it turns off automatically after one minute.

Auto Power OFF

Describes the automatic power-off feature after 30 minutes of inactivity, and how to disable it.

Turning Power OFF

Instructions on how to turn the meter off using the power button.

Manual Datalogging

Explains how to manually store and recall up to 98 temperature readings using the MEM and READ buttons.

Automatic Datalogging

Explains how to store up to 8,800 readings with programmable intervals (3-255 seconds) for later download.

Clearing stored data

Provides instructions on how to erase all data from the meter's memory.

Datalogging Software

Instructions on installing and using the supplied datalogging software on a PC.

Software Features

SAVE FILE ICON

Describes the icon for saving recorded data to a text file on the PC.

OPEN FILE ICON

Describes the icon for opening an already saved data file.

DATA LIST ICON

Explains how to view data in a list format and options to save, graph, or print.

DATA GRAPH ICON

Details how to view data as an x-y graph, with options for printing and scaling.

SAMPLING INTERVAL

Explains how to change the data logging interval, ranging from 1 to 86,400 seconds.

MIN/MAX/AVG ICON

Allows viewing of minimum, maximum, and average readings for T1 and T2 in real time via PC connection.

Downloading Readings from the Meter to a PC

Guides on initiating data download from the meter to the PC using the datalogger download icon.

Input Starting Time

Prompts the user to enter the datalogging start time (HR:MN:SC) when downloading data.

Warranty and Services

Warranty

Details the one-year limited warranty for the instrument and six months for sensors/cables, excluding user misuse.

Calibration and Repair Services

Offers information on repair and calibration services, recommending annual calibration for integrity.

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