Major MT632 User manual

INSTRUCTION MANUAL
DUAL CHANNEL DIGITAL
THERMOMETER
MT632

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Contents Page no
1. Introduction....................................................................................4
2. Specifications..................................................................................4
3. Features.........................................................................................4
4. Button............................................................................................4
5. Offset.............................................................................................6
6. Auto Power Off Mode........................................................................6
7. Measuring Temperatures..................................................................7

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1. INTRODUCTION
The two input contact thermometers offer fast response and laboratory
accuracy. These thermometers work with K-type or J-type thermocouples
as temperature sensors, and it has 0.1°C/0.1°F resolution.
2. SPECIFICATIONS
3. FEATURES
1. Large backlit display shows any combination of T1, T2, T1-T2, 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. Works with K-type or J-type thermocouples as temperature sensors.
5. Readout in °C, °F or Kelvin (K).
6. Auto Power Off mode (Sleep mode) increases battery life.
4. BUTTON
1. Press to turn the thermometer on or off.
2. When the thermometer is in Setup mode, press to enter a setup
option and press again to store the displayed setting in memory.
3. Press to toggle showing the T1, T2, and T1-T2 (differential
temperature measurement) in the primary and secondary.
4. Press to switch between Celsius (°C), Fahrenheit (°F), and Kelvin (K).
5. Press to freeze or unfreeze the displayed readings. When the
thermometer is in Setup mode, press to scroll to the Setup option
you want to change or press to increase the displayed setting.
Battery AAA 1.5 x 3
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)
J type thermocouples -210°C to 1100°c (-346°F to 2012°F)
Temperature accuracy:
T1, T2 Above -100°C (-148 °F) ±[0.15%rgd+ 1°C(1.8°F)]
T1, T2 Below -100°C (-148°F) ±[0.5%rgd+2°C(3.6°F)]
T1-T2 [0.5%rgd+1°C(1.8°F)]
Display Resolution 0.1°C;°F; K <1000 1°C / °F / K>1000
Function Range
UNITS
T1-T2

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6. 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 MIN/MAX/AVG mode, press the
button for 3 seconds to return to normal operation. When the
thermometer is in Setup mode, press to scroll to the Setup option
you want to change or press to decrease the displayed setting.
7. Press button to turn on the backlight. Press it again to turn off the
backlight. Press button for 3 seconds to start or exit Setup. (See
"Changing Setup Options.")
4.1. DISPLAY ELEMENTS
1 - Entering or Exiting Setup.
2 - Offset option.
3 - Freeze the displayed readings.
4 - Auto Power Off mode sign.
5 - Primary Display: T1, T2, T1-T2 reading.
6 - The temperature units.
7 - Secondary Display: MAX, MIN, AVG, or offset, T1 or T2 reading.
8 - MAX, MIN, AVG display.
9 - Time display.
10 - Min:sec or hour: min Display.
11 - Thermocouple type K or J.
12 - Low battery. Replace the batteries.
T1-T2
T1-T2

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4.2. USING THE THERMOCOUPLE (S)
1. Plug the therrnocouple(s) into the T1 or 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"- - - -".
4.3. CHANGING SETUP OPTIONS
Use Setup to change offset, sleep mode settings. The thermometer stores
the settings in its memory.
4.4. SETUP OPTIONS
Option Menu item Settings
Type TYPE K or J
Offset OFFSET T1 or T2
Sleep Mode SLP (sleep mode on) or OFF
(sleep mode off)
4.5. ENTERING OR EXITING SETUP
When the thermometer is in Setup mode, the display shows SETUP.
Press to start or exit Setup.
4.6. 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 MAX MIN mode .
5. 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.
6. 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 (fig.2). Press to store the new setting in memory. ON (sleep
mode on) or OFF (sleep mode off).
T1-T2
T1-T2
T1-T2
T1-T2

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7. MEASURING TEMPERATURES
7.1. CONNECTING A THERMOCOUPLE
To change the thermocouple type, see “Changing Setup Options."
The North American ANSI Color Code is:
1. Plug a thermocouple into the input connector(s). (Make sure that the
polarity is correct.)
2. Set the thermometer for the correct thermocouple type.
7.2. 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.
3. Press to toggle between showing the T1, T2, , and T1-T2 readings in
the primary or secondary 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.
7.3. 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, or T1-T2 readings in the primary or
secondary display.
3. Press again to turn off the HOLD function.
7.4. 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 MIN MAX 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 and AVG mode.
7.5. 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.")
7.6. REPLACING THE BATTERIES
1. Turn off the thermometer if necessary.
2. Loosen the screw and remove the battery door.
3. Replace 1.5V batteries.
4. Replace the battery door and tighten the screw.
Type J K
Color Color Yellow
T1-T2
T1-T2
UNITS

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