Digi-Sense DualLogR 91100-50 Manual
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Digi-Sense DualLogR 91100-50 Manual

Thermocouple thermometer
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DualLogR
THERMOCOUPLE THERMOMETER
MODEL NO. 91100-50
Cole-Parmer Instrument Co.
625 East Bunker Court
Vernon Hills, Illinois U.S.A. 60061-1844
(847) 549-7600
(847) 247-2929 (Fax)
800-323-4340
www.coleparmer.com
e-mail: techinfo@coleparmer.com
A-1299-0630
Edition 07
®

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  • Page 1 ® DualLogR THERMOCOUPLE THERMOMETER MODEL NO. 91100-50 Cole-Parmer Instrument Co. 625 East Bunker Court Vernon Hills, Illinois U.S.A. 60061-1844 (847) 549-7600 (847) 247-2929 (Fax) 800-323-4340 www.coleparmer.com e-mail: techinfo@coleparmer.com A-1299-0630 Edition 07 ®...

  • Page 2: Certificate Of Conformance

    CERTIFICATE OF CONFORMANCE This thermometer was calibrated using equipment traceable to the National Insti- tute of Standards and Technology (NIST). This instrument conforms to NIST monograph 175 revised to ITS-90. The accuracy of the thermometer at the time of calibration was within specifications stated in the operating manual.
  • Page 3 INTRODUCTION This versatile hand-held instrument provides highly accurate temperature measurements in Celsius, Fahrenheit, Rankine, or Kelvin using a wide range of thermocouple types. The temperature range for each type thermocouple is listed in the following chart. TYPE °C °F –200 to 1000 –328 to 1832 –250 to 1372 –418 to 2501...
  • Page 4 The instrument is designed for easy operation and includes the following features: • Operator selection of temperature scale • Resolution of 0.1° from −150°C to 999.9°C (−238°F to 999.9°F) • LCD with three four-digit displays • Two (2-blade female) ANSI mini-connector inputs •...

  • Page 5: Safety Precautions

    SAFETY PRECAUTIONS THIS INSTRUMENT IS WARNING DESIGNED TO ACCEPT LOW LEVEL SIGNALS SUPPLIED BY STAN- DARD THERMOCOUPLES. UNDER NO CIR- CUMSTANCES SHOULD THE INPUT VOLTAGE EXCEED THE SPECIFIED 50V RMS. DO NOT USE OR STORE CAUTION THIS INSTRUMENT IN MI- CROWAVE OVENS OR ANY ABNORMALLY HOT OR COLD AREAS.

  • Page 6: Specifications

    SPECIFICATIONS THERMOCOUPLE PROBES Type Temperature Range Type J: –200°C to 1000°C (–328°F to 1832°F ) Type K: –250°C to 1372°C (–418°F to 2501°F ) Type T: –250°C to 400°C (–418°F to 752°F ) Type E: –250°C to 1000°C (–418°F to 1832°F ) Type N: –250°C to 1300°C (–418°F to 2372°F ) Accuracy >...
  • Page 7 Temperature/Humidity Range Operating: Stated Accuracy: 18°C to 28°C (64°F to 82°F) Useful Range: 0°C to 40°C (32°F to 104°F) −40°C to 65°C Storage: (−40°F to 149°F) Humidity: 10% to 90% (non-condensing) Dimensions 3 cm D x 8.4 cm W x 15.8 cm H (1.2 in x 3.3 in x 6.2 in) Weight with batteries: 227 grams (8 ounces) Ingress protection: Meets IEC-529 IP-54 for dust...

  • Page 8: Battery Installation And Replacement

    BATTERY INSTALLATION AND REPLACEMENT WEAK BATTERIES SHOULD CAUTION NOT BE LEFT IN THE INSTRUMENT. DEAD BATTERIES CAN LEAK AND CAUSE DAMAGE TO UNIT. VOLTAGES PRESENT AT DANGER THE THERMOCOUPLE MAY ALSO BE PRESENT AT THE BATTERY TERMI- NALS. ALWAYS DISCONNECT THE THERMO- COUPLE WHEN CHANGING BATTERIES.
  • Page 9 If battery indicator turns on, battery life is approxi- mately 8 to 10 hours. The battery indicator will start blinking with less than 1 hour of life remaining. Bat- teries must be changed. AT THIS POINT, BATTERY MUST BE CHANGED. IF BATTERY VOLTAGE GOES TOO LOW, DIS- PLAY WILL GO BLANK.

  • Page 10: Connecting A Thermocouple

    CONNECTING A THERMOCOUPLE Note: Be sure your instrument setting (B, N, T, J, K, E, R or S) matches the thermocouple you are using. Use the correct thermocouple type for your instru- ment. Using an incorrect thermocouple type will result in erroneous readings. Thermocouples are color coded by type using the North American ANSI Color Code as follows: TYPE...

  • Page 14: Quick Setup

    QUICK SETUP Note: Review warnings on page 6. 1. Install batteries. 2. Connect thermocouple(s). 3. Press the ON/OFF key. The thermometer per- forms a self-test and all display digits and indi- cators, as shown below, should remain on for approximately one second. The clock will remain on for about three seconds.

  • Page 15: Temperature Scale

    COMPLETE SETUP PROCEDURE The setup function scrolls through a series of steps for selecting thermocouple type, temperature scale, resolution, filter dampening rate, setting the real-time clock, and accessing the Log sub-menu and the Print sub-menu. Either the complete setup can be run as described below, or the setup can be initiated and terminated at any step.

  • Page 16: Temperature Resolution

    TEMPERATURE RESOLUTION When 0.1° resolution is selected, a decimal point will appear in the three numerical displays. When 1° resolution is selected, no decimal point will be present. When measuring temperature above 999.9° or below −150°C, the thermometer automati- cally autoranges to 1° resolution. The SETUP annunciator will be on.
  • Page 17 3. The SETUP annunciator will be on and the left two digits in the lower left display will be flash- ing. Use the MAX key or MIN key to adjust the flashing digits to the desired hour setting. 4. Press the HOLD key to store the hours and advance to the month setting.

  • Page 18: Log Setup

    LOG SETUP The Log sub-menu is used to set the time intervals between the logged readings. The time can be set from 1 second to 60 minutes. Once the log sub- menu is setup, logging can be toggled ON or OFF by pressing the LOG key.
  • Page 19 2. Use the MAX key and/or MIN keys to ad- just the “seconds” as desired. Press HOLD key to store setting and advance to the “min- utes” setting. 3. Use the MAX key and/or MIN keys to ad- just the “minutes” as desired. Press HOLD key to store setting and proceed to the data output rate.

  • Page 20: Operating Procedures

    OPERATING PROCEDURES The unit will always power up with the upper dis- play showing T1 unless T1 is not connected. If only T2 is connected at power up, the upper dis- play shows T2 and the lower left display indicates T1 is open.

  • Page 21: Maximum Readings

    Dual Probe Measurements The thermometer will automatically determine if one or two thermocouples are connected. When two thermocouples are connected, the upper main dis- play will initially show T1 and the lower right dis- play will show T2. Pressing the T1/T2 key once will cause the upper display to show T2 and the lower left display to show T1.
  • Page 22 Single Probe Measurements The displayed information depends on whether you are using a single probe in the dual probe mode or have changed to the single probe differential mode by pressing the T1/T2 key. If you are using a single probe and in the dual probe mode, momentarily press the MAX key.
  • Page 23 MINIMUM READINGS The minimum reading function displays the mini- mum reading since power up or since the last time the clear function was used. While continually dis- playing every temperature change that occurs, the maximum and minimum values are sensed and au- tomatically stored until you are ready to observe the reading.
  • Page 24 Dual Probe Measurements Momentarily press the MIN key. The MIN an- nunciator turns on, and both minimum T1 and T2 readings appear in the lower display. The T1 read- ing is on the left display and the T2 reading is on the right display.

  • Page 25: Hold Function

    right display will immediately show the difference between the reference temperature and the present temperature point. Dual Probe Measurement 1. Connect the two probes to the two points of measurement. The lower left display will indicate the T1 temperature, the lower right display will indicate the T2 temperature.
  • Page 26 STORED READINGS The store function allows you to store up to 1000 readings. Each reading is logged with a storage location number and the time of occurrence. Both T1 and T2 readings are stored. To store readings proceed as follows: 1.
  • Page 27 2. To step through the readings, press the MAX key or the MIN key. Each press of the key will advance to the next reading in sequence. Hold the MAX key or MIN key down to continu- ously advance through the readings at an in- creasing rate.
  • Page 28 PRINTING Printing can output real-time readings or stored readings. The output is sent to the infrared (IR) printer output located at the top of the thermom- eter. The printer output default time period is once every 3 seconds. This time can be set to any value between 3 seconds and 60 minutes (see PRINT Setup ) in the COMPLETE SETUP PROCEDURE section.
  • Page 29 HP Printer Format for Log Dump New heading will appear when date changes. ---- = over range TOTAL READINGS: 05/21/96 T1 °F T2 °F 10:33:25 902.3 904.4 10:33:30 902.3 904.4 10:33:35 2504 2504 10:33:40 "----" 2504 10:33:45 100.0 - 17.8 10:33:50 100.0 - 17.8 10:33:55...
  • Page 30 The print function is controlled by the PRINT key. Proceed as follows: 1. Perform the PRINT Setup procedure to set the desired print rate. 2. Check that the IR printer input is properly aligned with the infrared output at the top of the thermometer.
  • Page 31 CALIBRATION The calibration function allows both single point and dual point calibration of the thermometer. Single point calibrates the offset only. Dual point calibrates the offset first then calibrates the slope. The ther- mometer can be calibrated at any temperature. When two probes are used, a match calibration matches the T1 and T2 offsets.

  • Page 32: Calibration Procedures

    When calibrating at freezing (0°C or 32°F) it is rec- ommended to use crushed ice made of distilled water in a dewar flask. Add crushed ice to top of flask. Top off flask with distilled water. Continue to add crushed ice to maintain tightly packed crushed ice/water in flask.
  • Page 33 3. Allow the reading to stabilize. If the displayed temperature is higher or lower than the reference temperature, use the MAX key to increase the displayed reading or the MIN key to de- crease the displayed reading until the reference temperature is displayed.
  • Page 34 Calibration Procedure (Two Probes Detected) This calibration function provides for both an offset and slope field calibration of either or both T1 and T2. For proper calibration the following conditions must be observed: • The slope point must be a higher temperature than the offset point.
  • Page 35 5. Allow the reading to stabilize. If the displayed temperature is higher or lower than the refer- ence temperature, use the MAX key to in- crease the displayed reading or the key to decrease the displayed reading until the reference temperature is displayed. The or MAX key must be pressed at least once.
  • Page 36 11. Press the HOLD key to lock the T2 slope calibration in, or press the CAL key to skip T2 slope calibration. In either case you will now be in T1 = T2 offset calibration. To return to normal operation press any key except CAL or HOLD If either T1 or T2 offset or slope were modified, CAL 1 or 2 will be lit.

  • Page 37: Field Calibration Lockout And Re-Enable

    FIELD CALIBRATION LOCKOUT AND RE-ENABLE The calibration lockout feature, prevents any field calibration changes. The lockout remains in effect until a lockout re-enable has been performed. Use the following procedures to lockout or re-enable the field calibration operation. Lockout Procedure 1.

  • Page 38: Maintenance And Troubleshooting

    MAINTENANCE AND TROUBLESHOOTING Properly used, the thermometer should maintain calibration indefinitely and not require service other than occasional cleaning of the housing and chang- ing of the batteries. TO PREVENT IGNITION OF WARNING A HAZARDOUS ATMOS- PHERE BY ELECTROSTATIC DISCHARGE, CLEAN WITH DAMP CLOTH.

  • Page 39: Intrinsic Safety

    SERVICE SUBSTITUTION OF COM- WARNING PONENTS MAY IMPAIR INTRINSIC SAFETY. LA SUBSTITUTION DE AVERTISSEMENT COMPOSANTS PEUT COM- PROMETTRE LA SECURITE INTRINSEQUE. There are no internal adjustments or user replace- able parts. If “Err” followed by the numbers 1 through 9 is dis- played (see example below) return unit for service.

  • Page 40: Troubleshooting

    TROUBLESHOOTING The following chart lists the most probable faults. There are no internal adjustments or user-replace- able parts. If this does not solve the problem refer service to your dealer. FAULT ACTION No display when Check condition of turned on. batteries.
  • Page 41 EU Declaration of Conformity ® ® Name of Apparatus: DIGI-SENSE DualLogR Thermocouple Thermometer Model Number: 91100-50 Description of Apparatus: Electronic Thermometer using a Thermocouple Probe Barnant Company declares that the above model is in conformity to the following harmonized standards...
  • Page 42 ACCESSORY THERMOCOUPLE PROBES The popular probes listed below have a nylon handle, a 5-ft coiled cord and a 316 SS sheath. General-purpose probes, 5 in long x 0.156 in dia with 0.093 in dia tip. 3 second time constant. Type J 08517-55 Type K 08516-55 Type T 08500-55 Penetration probes, 4 in long x 0.156 in dia...

  • Page 43: Warranty

    WARRANTY The Manufacturer warrants this product to be free from significant deviations from published specifications. If repair or adjustment is neces- sary within the warranty period, the problem will be corrected at no charge if it is not due to mis- use or abuse on your part as determined by the Manufacturer.

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