Transcript
MT645 2 Four Channel Digital Thermometer Data Logger
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Page 1. Specifications................................................................................3 2. Button............................................................................................4 3. Display Elements..........................................................................5 4. Offset.............................................................................................7 5. Measuring Temperatures ............................................................9
The four input contact thermometers offer fast response and laboratory accuracy. This data logging thermometer is suitable for most temperature measurement and data logging applications. These thermometers work with tow K-type or J-type thermocouples as temperature sensors, and it offered 0.1°C/0.1°F resolution.
1. Specifications General Specifications Battery AAA 3 x 1.5V Operating Temperature 0°C to 50°C (4°F to 122°F) Noncondensing Operating humidity Max.80%(<31°C/87°F) Linearly decreasing to 50%(<40°C/104°F) Storage Temperature -10°C to 50°C (14°F to 122°F) Storage humidity <80% 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 ±[0.15%rgd+1°C(1.8°F)] Above -100°C (-148°F) T1, T2 ±[0.5%rgd+2°C(3.6°F)] Blow -100°C (-148°F) T1-T2 ±[0.5%rgd+1°C(1.8°F)] T3, T4 ±[0.15%rgd+1°C(1.8°F)] Above -100°C (-148°F) T3, T4 ±[0.5%rgd+2°C(3.6°F)] Blow -100°C (-148°F) T3-T4 ±[0.5%rgd+1°C(1.8°F)] Display Resolution 0.1°C/°F/K<1000 , 1°C/°F/K>1000
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Features •Large backlit display shows any combination of T1, T2, T1-T2, T3, •T4, T3-T4, plus MAX, MIN, AVG. •Relative time clock on MAX MIN and AVG provides a time reference •for major events. •Electronic Offset function allows compensation of thermocouple •errors to maximize overall accuracy. •Work with tow K-type or J-type thermocouples as temperature •sensors. •Readout in °C, °F, or Kelvin (K). •USB interface, USB to UART Bridge Controller. •18,000 records data logger per channel. •Auto Power Off mode (Sleep mode) increases battery life.
2. Button 1.Press to turn on the thermometer, and press button for 3 seconds 1.to turn off. the thermometer. 2.Press REC/ENTER for 3 seconds to start recording and press again 1.to stop recording. When the thermometer is in Setup mode, press 1.REC/ENTER to enter a setup option and press REC/ENTER again 1.to store the displayed setting in memory. 3.Press /T1-T2/T3-T4 to toggle showing the T1, T2 and T1-T2 1.(differential temperature measurement) or the T3, T4 and T3-T4 1.(differential temperature measurement) in the primary and secondary. 1.Press /T1-T2/T3-T4 for 3 seconds to toggle showingT1, T2 or T3, 1.T4 in the primary and secondary. Press /T1-T2/T3-T4 when the 1.thermometer is in Setup mode, press /T1-T2/T3-T4 to scroll to 1.the Setup option you want to change or press /T1-T2/T3-T4 to 1.increase the displayed setting. 4.Press UNITS to switch between Celsius (°C), Fahrenheit (°F), and 1.Kelvin (K). 5.Press HOLD to freeze or unfreeze the displayed readings. When 1.the thermometer is in Setup mode, press HOLD to scroll to the 1.Setup option you want to change or press HOLD to decrease the 1.displayed setting.
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6.Press /MAX/MIN to step through the maximum, minimum, and 6.average readings. When readings, shows the maximum, minimum, 6.and average of the logged readings. To exit the MIN/MAX/AVG 6.mode, press the /MAX/MIN button for 3 seconds to return to 6.normal operation. 7.Press SET button to turn on the backlight. Press it again to turn off the backlight. Press SET button for 3 seconds to start or exit Setup. (See "Changing Setup Options.")
3. Display Elements 1-T1, T2, T1-T2,T3,T4 and T3-T4 Display. 2-Freeze the displayed readings. Offset option. 3-Auto Power Off mode sign. 4-Primary Display: T1, T2, T1-T2, T3,T4 and T3-T4reading. 5-The temperature units. 6-Secondary Display: MAX, MIN, AVG, or offset, T1~T4 reading. 7-MAX, MIN, AVG display. 8-Tertiary display ,Time display. 9-Min:sec or hour: min Display. 1 2 3 10-Enter setup mode ,SETUP Display 11-Low battery. Replace the batteries. 12-Thermocouple type K or J. 13-Offset option, OFFSET Display. 14.-Data logging, REC Display.
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Using the thermocouple (s) 1.Plug the thermocouple(s) into the T1, T2, T3 or T4input 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 "----". Changing Setup Options Use Setup to change offset, Sample rate, Time setting, Clear the memory setting, sleep mode settings. The thermometer stores the settings in its memory. Setup Options Option Offset Sample rate Time setting Clear Sleep Mode
Menu item T1,T2,T3,T4 rAt tiE CLR SLP
Settings T1, T2, T3, T4 offset sampling of recording Show the time or Set the time Clear the memory operation On (sleep mode on) or 0FF (sleep modeoff)
Entering or Exiting Setup When the thermometer is in Setup mode, the display shows SETUP. Press SET button for 3 seconds start or exit Setup. Changing a Setup Option 1.Press /T1-T2/T3-T4 or HOLD to scroll to the setup option you want to change. 2.Press REC/ENTER to indicate that you want to change this setting. 3.Press /T1-T2/T3-T4 or HOLD until the setting you want to use appears on the display. 4.Press REC/ENTER to store the new setting in memory. Notes: Setup is disabled in MIN MAX,REC mode.
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4. 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, T3, T4. When the thermometer is in Setup mode, the display shows SETUP. Press /T1-T2/T3-T4 or HOLD to scroll to the T1 or T2 offset setup option page. Press REC/ENTER to indicate the T1 or T2 Fig.1 offset in Secondary Display. Press /T1-T2/T3-T4 or HOLD until the setting you want to use appears on the display (fig.1).Press REC/ENTER to store the new setting in memory. Sample Rate The tertiary display shows the sample rate of the temperature data recording. When the meter is power, the default sample rate is the last setting. The tertiary display show "00 : 01". The order is minute---second. Press /MAX/MIN to adjust the order. Press /T1-T2/T3-T4 or HOLD until the setting you want to use appears on the display (fig.2). Press REC/ENTER to store the new setting in memory.
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Time Setting When the thermometer is in Setup mode, the display shows SETUP. Press /T1-T2/T3-T4 or HOLD to scroll to the time setting option page (fig.3). Press REC/ENTER to indicate time in Display (fig.4).
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1.The time showing. The primary display shows the year. The secondary display shows the month and the day, the tertiary display shows the hour and minute. (In fig.4, the display shows the time 2010-05-20 18:20). If we want not adjust the time, press REC/ENTER directly to exit time setting. 2.The time setting. The adjust order is year---month ----day----hour---minute. Press /MAX/MIN to adjust the order. Press /T1-T2/T3-T4 or HOLD until the setting you want to use appears on the display. If the time is adjusted, Press REC/ENTER to store the new setting in memory. Erase Memory Operation When the thermometer is in Setup mode, the display shows SETUP. Press /T1-T2/T3-T4 or HOLD to scroll to the memory setting option page. Press REC/ENTER to indicate time in memory left(fig.5). When one want to clear the memory, enter CLR setup operation, Press /T1-T2/T3-T4 or HOLD until the display show "YES", Press REC/ENTER, then clear the memory.
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Auto Power Off mode The thermometer enters sleep mode (default). That is to say, the meter will automatically shut off after 15 minutes if no button press occurs for 15 minutes. When the thermometer is in Setup mode, the display shows SETUP. Press /T1-T2/T3-T4 or HOLD to scroll to the "SLP" page. Press REC/ENTER to indicate "On" or "OFF". Press /T1-T2/T3-T4 or HOLD until the setting you want to use appears on the display. Press REC/ENTER to store the new Fig.6 setting in memory. On (sleep mode on) or 0FF (sleep mode off).
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5. Measuring Temperatures Connecting a Thermocouple To change the thermocouple type, see "Changing Setup Options." The North American ANSI Color Code is: Type J K Color Black Yellow •Plug a thermocouple into the input connector(s).(Make sure that •the polarity is correct.) •Set the thermometer for the correct thermocouple type. Displaying Temperatures •Press UNITS to select the correct temperature scale. •Hold or attach the thermocouple(s) to the measurement location. •The temperature reading appears in the primary display. •Press /T1-T2/T3-T4 to toggle between showing the T1, T2, and •T1-T2 readings in the primary or secondary display. •Press /T1-T2/T3-T4 for 3 second to toggle between showing the •T3, T4. and T1-T2 readings in the primary or secondary display. •Press /T1-T2/T3-T4 to toggle between showing the T3, T4, and •T3-T4 readings in the primary or secondary display. •Press /T1-T2/T3-T4 for 3 seconds return 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. Holding the Displayed Readings •Press HOLD to freeze the readings on the display. The display •shows HOLD. •Press /T1-T2/T3-T4 to toggle showing the T1, T2, or T1-T2 readings •in the primary or secondary display. •Press /T1-T2/T3-T4 for 3 second to toggle between showing the •T3, T4. and T1-T2 readings in the primary or secondary display. •Press HOLD again to turn off the HOLD function.
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Viewing the MIN, MAX, and AVG Readings •Press /MAX/MIN 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. •Press /MAX/MIN button for 3 seconds to exit MAX, MIN and AVG •mode. Record Data •Press to turn on the thermometer. After 2 •second the thermometer displays the first reading •(fig.7). The reading is the number of the •thermometer that can record data (18000). When •the memory is full, thermometer displays the first •reading "FULL",or press REC/ENTER button for 3 •seconds, the "REC" character flashes 5 times, please •erase Memory. (See "Changing Setup Options", •"Erase Memory Operation."). •Press REC/ENTER button for 3 seconds, the meter Fig.7 •will start recording, and press REC/ENTER button for 3 seconds •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. •Plug the thermocouple into the input connector. •Place the thermocouple in a known, stable temperature environment •(such as an ice dry well calibrator). •Allow the readings to stabilize. •In Setup change the offset until the primary reading matches the •calibration temperature.("Changing Setup Options.")
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Replacing the Batteries •Turn off the thermometer if necessary. •Loosen the screw and remove the battery door. •Replace 1.5V batteries. •Replace the battery door and tighten the screw. Notes If you do not use the thermometer a long time, remove the battery.
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