EBCHQ 94915 User manual

OPERATION MANUAL
Professional Thermocouple
Thermometers

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The (three input) offers fast response and laboratory
accuracy. This data logging thermometer is suitable for most
temperature measurement and data logging applications.
These thermometers work with two K-type thermocouples
and one IR temperature probe as temperature sensors, and
it offered 0.1 °C / 0.1°F resolution. It internal memory can
keep up to 18,000 records per channel. It uses USB
interface to perform bi-directional communication with PC.
Features
1. Large backlit display shows any combination of T1, T2,
T3, T1-T2 , T1-T3, T2-T3,plus MAX, MIN, AVG.
2. Relative time clock on MAX MIN and AVG provides a
time reference for major events.
3. Electronic Offset function allows compensation of
thermocouple errors to maximize overall accuracy.
4. Readout in °C, °F, or Kelvin (K).
5. USB interface, USB to UART Bridge Controller.
6. 18,000 records data logger per channel.
7. Auto Power Off mode (Sleep mode) increases battery
life.

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Specification
General Specifications
Operating Temperature
0 °C to 50 °C (4 °F to 122 °F)
Noncondensing
Storage Temperature 10 °C to 50 °C (14 °F to 122 °F)
Temperature Range:
K type thermocouples -200 °C to 1372 °C (-328 °F to 2501 °F)
IR Temperature -30 °C to 550 °C (-22 °F to1022 °F)
Temperature accuracy
T1, T2 Above –100 °C (-148 °F) ± [0.15%rgd+1°C(1.8 °F)]
T1, T2 Blow –100 °C (-148 °F) ± [0.5%rgd+2 °C(3.6 °F)]
T1-T2 ± [0.5%rgd+1
0
C(1.8
0
F)]
T3
T3 Above-10 °C(14 °F) ± [2.0%rgd+2°C(3.6°F)]
T 3Blow -10 °C(14 °F) ± 5 °C( 9.0°F)
T1-
T3
T3 Above-10 °C(14 °F) ± [2.0%rgd+3°C(5.4°F)]
T3 Blow -10 °C(14 °F) ± 6 °C(11°F)
T2-
T3
T3 Above-10 °C(14 °F) ± [2.0%rgd+3°C(5.4°F)]
T3 Blow -10 °C(14 °F) ± 6 °C(11°F)
Display Resolution 0.1°C / °F/ K <1000,
1°C / °F /K >1000

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Button
1. Press to turn the thermometer on or off.
2. Press to step through the maximum, minimum, and
average readings. When readings, shows the maximum,
minimum, and average of the logged readings. To exit
the MAN/MIX/AVG mode, press the button for
3 seconds to return to normal operation.
3. Press to switch between Celsius (°C), Fahrenheit
(° F), and Kelvin (K).
4. Press to freeze or unfreeze the displayed
readings.
5. Press to toggle showing the T1, T2, T3 and
T1-T2 ,T1-T2,T2-T3 (differential temperature
measurement) in the primary , secondary and tertiary
display.
6. Press button to turn on the backlight. Press it
again to turn off the backlight. Press button for 5
seconds to start or exit Setup. (See "Changing Setup
Options.")
7. Press to scroll to the Setup option you want to
change. Press to increase the displayed setting.

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8. Press to start recording and press again to stop
recording .if enter a Setup option .scroll to the Setup
option you want to change. Press to decrease the
displayed setting.
9. Press to enter a Setup option. Press again
to store the displayed setting in memory.
Display Elements
1. Thermocouple type. Flashing
when the meter is recording.
2. IR temperature . Flashing
when the meter recording.
3. Freeze the displayed reading.
4. Entering or Exiting Setup.
5. Primary Display: T1, T2, T3 ,
T1-T2,T1-T3,or T2-T3 reading.
6. Secondary Display: MAX, MIN,
AVG, or offset, T1, T2 or T3 reading.
7. The temperature units. .
8. Tertiary Display :The elapsed time or T1, T2, T3 reading.
9. Low battery. Replace the batteries.
10. min : sec or hour : min Display..
11. MAX, MIN, AVG display.

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Using the thermocouple (s)
1. Plug the thermocouple(s) into the T1or T2 input
connector(s).
2. Press to turn on the thermometer. After 1 second
the thermometer displays the first reading. If no
thermocouple is plugged into the selected input or the
thermocouple is "open," the display shows "- - - -".
3. Press and hold this button 3 second to turn off the
Power.
Using the IR (Infrared Ray)
1. Plug the output of Infrared Ray measurement into the T3
(IR input) connector(s) of thermometer, “T3 - - - -” will
show on screen. If the Infrared Ray measurement is not
connected, “T3 - - - -” is not show on the screen.
2. Press the “SCAN” button of Infrared Ray measurement,
the temperature will show on the screen.
Changing Setup Options
Use Setup to change offset, sleep mode settings. The
thermometer stores the settings in its memory.
Setup Options
Option Menu item Settings
Offset T1,T2,T3 T1 or T2，T3 offset
Sample rate rAt sampling of recording
Time setting tiE Show the time or Set the time
Clear CLR Clear the memory operation
Sleep Mode SLP On (sleep mode on) or 0FF
(sleep modeoff)

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Entering or Exiting Setup
When the thermometer is in Setup mode, the display shows
SETUP.
Press button for 5 seconds start or exit Setup.
Changing a Setup Option
1. Press or to scroll to the setup option you want
to change.
2. Press to indicate that you want to change this
setting.
3. Press or until the setting you want to use
appears on the display.
4. Press to store the new setting in memory.
Notes: Setup is disabled in MIN MAX/AVG or REC mode.
Offset
The primary display shows the
temperature plus the offset and the
secondary display shows the offset.
You can store individual offsets for T1,
T2 and T3.

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Sample Rate
The tertiary display shows the
sample rate of the temperature
data recording. When the meter
is power ,the default sample rate
is 1 second.. The tertiary display
show “ 0 0 0 1”. The order is
minute---second. Press to
adjust the order. Press or until the setting you
want to use appears on the display. Press to store
the new setting in memory.
Time Setting
1. Show the time. The primary display
shows the year. The secondary
display shows the month and the
day, the tertiary display shows the
hour and minute. (The display right
shows the time 2007-3-30 16:25). If
the time is not adjusted, press directly to exit
time setting.

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2. Set the time. The adjust order is year---
month ----day---- hour --- minute.
Press to adjust the order. Press
or until the setting you want
to use appears on the display. If the
time is adjusted, Press to store
the new setting in memory.
Erase Memory Operation
When one want to clear the memory, enter CLR setup
operation, Press or until the display show “SURE
YES”, Press , then clear the memory.
Auto Power Off mode
The thermometer enters sleep mode (default). That is to say,
the meter will automatically shut off after 20 minutes if no
button press occurs for 20 minutes. When the thermometer
is in Setup mode, the display shows SETUP. Press
or to scroll to the “ SLP ” page . Press to
indicate “On” or “OFF”. Press or until the setting
you want to use appears on the display. Press to
store the new setting in memory. On (sleep mode on)or 0FF
(sleep mode off).

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Displaying Temperatures
1. Press to select the correct temperature scale.
2. Hold or attach the thermocouple(s) to the measurement
location. The temperature reading appears in the primary
display.
Notes
The display shows "- - - -" when a thermocouple is not
connected.
The display shows OL (overload) when the temperature
being measured is outside the thermocouple’s valid range.
Holding the Displayed Readings
1. Press to freeze the readings on the display .The
display shows HOLD.
2. Press to toggle showing the T1, T2, T3,T1-T2,T1-T3,
or T2-T3 readings in the primary or secondary display.
3. Press again to turn off the HOLD function.
Viewing the MIN, MAX, and AVG Readings
1. Press to step through the maximum (MAX), minimum
(MIN), or the average (AVG) readings. The elapsed time
since entering MAX/ MIN/AVG mode, or the time at which
the minimum or maximum occurred appears on the
display.
2. Press button for 3 seconds to exit MAX/MIN/AVG
mode.

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Record Data
Press to turn on the thermometer.
After 1 second the thermometer displays
the first reading (18000). The reading is the
number of the thermometer that can record
datas. When the memory is full,
thermometer displays the first reading
“FULL”, please erase Memory
Press , the meter will start recording,
and press again will stop recording.
Using the Offset to Adjust for Probe Errors
Use the offset option in Setup to adjust the thermometer’s
readings to compensate for the errors of a specific the
thermocouple and IR temperature. The allowable adjustment
range is ± 5.0°C or ± 9.0°F.
1. Plug the thermocouple into the input connector.
2. Place the thermocouple in a known, stable temperature
environment (such as an ice dry well calibrator).
3. Allow the readings to stabilize.
4. In Setup change the offset until the primary reading
matches the calibration temperature.(“Changing Setup
Options.")
Replacing the Batteries
1. Turn off the thermometer if necessary.
2. Loosen the screw and remove the battery door.
3. Replace 9V batteries.
4. Replace the battery door and tighten the screw.

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