EXTECH EA15 Thermocouple Datalogging Thermometer User Manual

User Manual
Thermocouple Datalogging Thermometer
Seven (7) Thermocouple input types K, J, T, E, R, S, N
Dual thermocouple Input with PC Interface
Model EA15

Additional User Manual Translations available at www.extech.com

Introduction

Congratulations on your purchase of the Extech Datalogging Thermometer. The EA15 offers dual thermocouple inputs with manual and automatic datalogging capabilities. The EA15 includes a PC interface and Windows compatible software for real-time monitoring and storage of temperature data. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service.

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 buttons5. MEM, input TYPE, and READ buttons
5. SET button
6. Battery compartment (rear)
7. Up/Down scroll button
8. Enter Button

Operation

Connecting thermocouples

1. This meter accepts two thermocouples with spade plugs (sub-miniature type K 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 the 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. When a thermocouple is not plugged into the selected input, or if a thermocouple is “open”, the display will show “- – – – -“. The default thermocouple type, units and display configuration are determined from the parameters selected when the meter was last used.
Selecting thermocouple type
Press the TYPE button to select the type of thermocouple.
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) is the primary display; T2 (thermocouple 2) is the lower display
b. T2 is the primary display and T1 is the lower display
c. T1-T2 (difference between T1 and T2) is the primary display and T1 the lower display
d. T1-T2 is the primary display and T2 is the 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 erromay occur.
• If a potential exists between the thermocouples, use electrically insulated thermocouples.

Data Hold
Press the HOLD button to freeze the displayed reading. The ‘H’ HOLD icon will appear on the display. Press the HOLD button again to return to normal operation.
MIN, MAX, AVG Recording Function and Timer
Press the MX/MN button to begin capturing the Minimum (MN), Maximum (MX), and Average (AVG) temperature values. The Elapsed Time clock will appear on the lower left of the display. The primary display shows the current temperature. The lower display will indicate the MX, MN or AVG value (depending on which is selected) captured since the MX/MN button was pressed.

1. Press the MX/MN button to step through the MX, MN or AVG display Each reading will be accompanied by a Timer value indicating the time the reading was recorded
2. Press and hold the ‘↵’ button to change the elapsed time format from min:sec to hour:min
3. Press and Hold the MX/MN button to exit the MX/MN function.

Backlight
Press the backlight button to switch on the LCD display backlight. The backlight will automatically switch off after one minute (press button again to turn the light off manually).
Auto Power OFF
The meter will automatically switch off after 30 minutes of inactivity. AUTO POWER OFF is disabled in the MAX/MIN and Datalogging modes.
To disable AUTO POWER OFF manually:

1. Hold the enter button ‘↵’ while turning power on.
2. The AUTO POWER OFF function will reactivate when the meter is turned off.

Turning Power OFF
Press the button to turn power off.
Manual Datalogging
Manual datalogging allows the user to store and recall up to 98 temperature readings.

1. Press the MEM button to manually store a single reading into memory. The ‘MEM’ icon and location number of the reading will appear on display for two seconds and then the normal display will return.
2. To view stored readings, press the READ button. The memory location number will briefly appear and then the ‘READ’ icon and the stored values will appear on the display
3. Use the up/down buttons to scroll through the memory locations and view the logged readings.
4. Press the ‘READ’ button to exit the read mode
5. Press and hold the MEM button while turning the meter on to clear the memory. When the LCD indicates “CLr”, the memory has been cleared.

Automatic Datalogging
Automatic datalogging allows the user to store up to 8,800 temperature readings in memory for later downloading and viewing using the supplied software. The storage interval rate is programmable from 3 to 255 seconds.

1. Press and HOLD the SET button for two seconds to enter the interval programming screen. The ‘MEM’ and ‘INTERVAL’ icons and interval time will appear on the display. Use the up/down buttons to scroll through the available intervals (3 to 255 seconds). Press the ‘↵’ button to select the desired logging interval
2. Make note of the start time (time of day) for the datalogging session as this information is needed when downloading the data.
3. Press and hold the MEM button for two seconds to enter the datalogging mode. The ‘MEM’ icon on the center of the display will flash each time a record is stored (at the interval selected). When the memory is full, ‘FULL’ will appear on the display and the  meter will stop logging data.
4. To stop and exit the datalogging mode, press the MEM button.
5. Download the stored data using the supplied software.
   Note: MAX/MIN/AVG functions can be used with the meter in datalogging mode

Clearing stored data

1. Press the “ ” button to turn the meter off.
2. Press and hold the MEM button, then press the “ ” button to turn the meter on. When the LCD indicates “CLr”, the entire memory has been erased.

Maintenance

Cleaning
The meter can be cleaned with a damp cloth. A mild detergent may be used but avoid solvents, abrasives, and harsh chemicals.
Battery Installation / Replacement
The battery compartment is located on the back of the meter. The compartment is easily accessed by removing the ‘flat head’ screw on the back of the meter, and removing the compartment cover.
Replace or install the six ‘AAA’ batteries observing polarity and re-assemble the battery compartment. Please dispose of batteries responsibly and in accordance with all regulations.
Never dispose of used batteries or rechargeable batteries in household waste.
As consumers, users are legally required to take used batteries to appropriate collection sites, the retail store where the batteries were purchased, or wherever batteries are sold.
Disposal: Do not dispose of this instrument in household waste. The user is obligated to take end-of-life devices to a designated collection point for the disposal of electrical and electronic equipment
Storing
When the meter is to be stored, please remove the battery and affix the sensor’s protective cover. Avoid storing the meter in areas of extreme temperature and humidity.

FCC Statement

Warning: Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
– Reorient or relocate the receiving antenna.
– Increase the separation between the equipment and receiver.
– Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
– Consult the dealer or an experienced radio/ TV technician for help.

Specifications

Measurement Ranges| K – Type : -150.0 o C to +1370.0 o o C (-200.0 F to +1999.9° F)
J – Type : -150.0 o C to +1090.0 o o C( -200.0 F to +1994.0° F)
T – Type : -150.0 o o C to +400.0 o C (-200.0 o F to +752.° F)
E – Type : -150.0 o o C to +870.0 o C (-200.0 F to +1598.0 ° F)
R – Type : 0.0 o C to +1767.0 o o C (+32 F to +1999.9 ° F)
S – Type : 0.0 o C to +1767.0 o o C (+32 F to +1999.9 ° F)
N – Type : -150.0 o C to +1300.0 o o C (-200.0 F to +1999.9 ° F)
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esolution| J, K, T, E, N Type: 0.1° F/ C/K
R, S Type: 1.0°  F/ C/K (0.1° for reference only)
Accuracy| J, K, T, E, N Type: ±(0.05% reading + 0.75 ° C (1.5°F) below  -100°C (-148°F): add 0.15% of reading for J, K, E and N; 0.45% of reading for T; and ±0.05 of reading +1°C(2°F) for R, S
Temperature Coefficient| 0.01% of reading +0.06°F per °F (+0.03 °C) outside the specified +18°C to 28°C (+64°F to 82°F) range Below  -100°C (-148°F): 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).

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