UNI-T UT371 Operating Manual
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UNI-T UT371 Operating Manual

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Model UT371/372
OPERATING MANUAL

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Summary of Contents for UNI-T UT371

  • Page 1 Model UT371/372 OPERATING MANUAL...

  • Page 2: Table Of Contents

    Model UT371/372: OPERATING MANUAL TABLE OF CONTENTS TITLE PAGE Overview Unpacking Inspection Safety Information Rules For Safe Operation International Electrical Symbols The Meter Structure Functional Buttons Setup Display Symbols Measurement Operation A. RPM Measurement B. Counts C. Data Transferring and USB...
  • Page 3 Model UT371/372: OPERATING MANUAL TABLE OF CONTENTS TITLE PAGE Specifications A. General Specifications B. Environmental Requirements Accuracy Specifications A. RPM B. Counts Maintenance A. General Service B. Replacing the Battery...

  • Page 4: Overview

    This Operating Manual covers information on safety and cautions. Please read the relevant information carefully and observe all the Warnings and Notes strictly. Model UT371 and UT372 is a stable, safe and reliable digital non-contact Tachometer. This Tachometer can measure RPM and counts. RPM range is 10 ~ 99999 while counts range is 0 ~ 99999.

  • Page 5: Safety Information

    Model UT371/372: OPERATING MANUAL In the event you find any missing or damage, please contact your dealer immediately. Safety Information This Meter complies with the standards IEC61010-031, IEC61326, : in pollution degree 2 Use the Meter only as specified in this operating manual, otherwise the protection provided by the Meter may be impaired.

  • Page 6: Rules For Safe Operation

    Model UT371/372: OPERATING MANUAL Rules For Safe Operation Before using the Meter inspect the case. Do not use the Meter if it is damaged or the case (or part of the case) is removed. Look for cracks or missing plastic.

  • Page 7: International Electrical Symbols

    Model UT371/372: OPERATING MANUAL Soft cloth and mild detergent should be used to clean the surface of the Meter when servicing. No abrasive and solvent should be used to prevent the surface of the Meter from corrosion, damage and accident.

  • Page 8: The Meter Structure

    Model UT371/372: OPERATING MANUAL The Meter Structure (see figure 1) Tachometer Light Source. LCD Display. USB Port (UT372 only) Housing Functional Buttons Figure 1...

  • Page 9: Functional Buttons

    Model UT371/372: OPERATING MANUAL Functional Buttons Below table indicated for information about the functional button operations. Button Operation Performed l Press once to turn the meter on. l Press and hold for 1 minute to turn it off. ON/OFF l When measuring RPM and Counts, press once to enter the Hold mode. Press it again to exit hold mode.

  • Page 10: Setup

    Model UT371/372: OPERATING MANUAL Setup A. USB setup Press R/C button to select USB feature after turning on the Meter. Then press M/M/A button to setup 0 or 1. 0 means turn the USB off. 1 means enable the USB feature.
  • Page 11 Model UT371/372: OPERATING MANUAL if you do not press any button for 10 minutes. You could press ON/OFF button to turn on the Meter again after the Meter is off. E. CLK setup Press R/C button to select CLK feature after turning on the Meter. Then press M/M/A button to setup 0 or 1.

  • Page 12: Display Symbols

    Model UT371/372: OPERATING MANUAL Display Symbols (see figure 2) Figure 2...
  • Page 13 Model UT371/372: OPERATING MANUAL Number Meaning Unit of Tachometer Unit of Counts Time The battery is low. Indicator of Sleep Mode Measurement of RPM and Counts Data Hold is on Display of Maximum reading Display of Minimum reading Display of Average reading...

  • Page 14: Measurement Operation

    Model UT371/372: OPERATING MANUAL Measurement Operation Wa r n i n g To reserve battery, the USB feature will be automatically off when the Meter is restarted. The other setting remains unchanged. The Time will be off after the HOLD feature is enabled. The time will be on again after existing HOLD mode.
  • Page 15 Model UT371/372: OPERATING MANUAL To carry out RPM measuremnet, follow the following procedure: Apply a piece of reflecting tape to the object under test. Position the Meter on a flat place. Hold the Meter 50~200mm from the Tachometer light source to the object under test.

  • Page 16: Counts

    Model UT371/372: OPERATING MANUAL B. Counts Self-lighted Counts (see figure 4) 1. Position the Meter on a flat place. Hold the Meter 50~200mm and at the vertical angel not greater than 30° from the Tachometer light source to the object under test.
  • Page 17 Model UT371/372: OPERATING MANUAL Receiving Light Source Outside (see figure 5) Position the Meter on a flat place. Hold the Meter 50~200mm and at the vertical angel not greater than 30° from the Tachometer light source to the object under test.

  • Page 18: Data Transferring And Usb

    Model UT371/372: OPERATING MANUAL C. Data Transferring and USB (UT372 only, see figure 6) Connect the USB interface cable, the Meter and the computer as per the figure 6. Figure 6...

  • Page 19: Specifications

    Model UT371/372: OPERATING MANUAL Specifications A. General Specifications l Display: 5 digits LCD display, Maximum display 99999. l Overloading: Display OL. l Battery Deficiency: Display l Sampling Rate: 5 mini-second to 255 mini seconds adjustable. l Transducer Tyype: Photo Diode and Laser...

  • Page 20: Environmental Requirements

    Model UT371/372: OPERATING MANUAL B. Environmental Requirements l For indoor use only. l Altitude: 2000m l Temperature and humidity: Ø Operating: C~30 C( 85%R.H) C~40 C ( 75%R.H) C~50 C ( 45%R.H) Ø Storage: C~ +60 C( 85%R.H) l Safety/ Compliances: IEC61010-031, IEC61326, IEC 61010-1 pollution degree 2.

  • Page 21: Accuracy Specifications

    Model UT371/372: OPERATING MANUAL Accurate Specifications Accuracy: (a% reading + b digits), guarantee for 1 year. Operating temperature: 23 Operating humidity: 80%RH Temperature Coefficient: 0.1 x (accuracy) / A. RPM Range Resolution Accuracy 10~99.999 r/min 0.001 r/min 100~999.99 r/min 0.01 r/min ( 0 .

  • Page 22: Maintenance

    Model UT371/372: OPERATING MANUAL MAINTENANCE This section provides basic maintenance information including battery replacement instruction. Warning Do not attempt to repair or service your Meter unless you are qualified to do so and have the relevant calibration, performance test, and service information.

  • Page 23: Replacing The Battery

    Model UT371/372: OPERATING MANUAL B. Replacing the Battery (see figure 7) 1. Press ON/OFF to turn the Meter off. 2. Turn the Meter’s front case down. 3. Remove the screw from the battery door, and separate the battery door from the case bottom.
  • Page 24 Model UT371/372: OPERATING MANUAL * END * This operating manual is subject to change without notice.
  • Page 25 Model UT371/372: OPERATING MANUAL Copyright 2007 Uni-Trend Group Limited. All rights reserved. Manufacturer: Uni-Trend Technology (Dongguan) Limited Dong Fang Da Dao Bei Shan Dong Fang Industrial Development District Hu Men Town, Dongguan City Guang Dong Province China Postal Code: 523 925...

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