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UNI-T UT381 Instruction Manual
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UNI-T UT381 Instruction Manual

Luminometer
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UT381/382
Luminometer
Instruction Manual

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Summary of Contents for UNI-T UT381

  • Page 1 UT381/382 Luminometer Instruction Manual...

  • Page 2: Table Of Contents

    UT381/382 Instruction Manual Contents Chapter Page UT380 Series Product Introduction II Unpacking Inspection III Safety Instruction IV Meter Structure V Setting and Operation of Meter VI Specifications VII Maintenance...

  • Page 3: Iut380 Series Product Introduction

    UT381/382 Instruction Manual I UT380 Series Product Introduction UT380 series luminometer has two models: UT381 and UT382. UT380 series luminometer is a kind of digital meter applying high-precision digital visible light sensor and 8-bit microprocessor processing data. Illuminance: Illuminance means the luminous flux received on each unit area of illuminated object, with adopted unit of foot candle (12 inches make 1foot) in Britain and USA and meter candle in Europe.

  • Page 4: Unpacking Inspection

    UT381/382 Instruction Manual II Unpacking inspection Unpack and check, if there is any damage or loss, contact with the nearest local sales service agency 1. Mainframe 1 unit 2. Instruction manual 1 copy 3. USB testing line (only for UT382) 1 piece 4.

  • Page 5: Safety Instruction

    UT381/382 Instruction Manual III Safety Instruction Warning potential operation and condition which are dangerous or factors which may cause damage to the luminometer are indicated in following context! Motion or status with potential harm to users or the factors having possible damage on illuminometer will be identified as below.
  • Page 6 UT381/382 Instruction Manual ● Please do not use it in the place adjacent to explosive gas, steam and dust. ● Do not dismantle the shell of luminometer without authorization to avoid luminometer damage. ● Do not charge the battery to avoid battery explosion and personal injury.

  • Page 7: Meter Structure

    UT381/382 Instruction Manual IV Meter Structure 1. Meter structure (Figure 1,Table 1) Sensitive mirror Mainframe Display screen Keyboard Table 1 Figure 1...
  • Page 8 UT381/382 Instruction Manual 2. Signs (Figure 2, Table 2) Auto range sign Auto Minimum value display sign Maximum value display sign Data hold sign HOLD Main display Full storage display sign FULL Auto power off sign USB communication (UT382 only)
  • Page 9 UT381/382 Instruction Manual 3.Keys description (Figure 3 ) Figure 3...
  • Page 10 UT381/382 Instruction Manual 1. Power on/off key: long press to power on, shot press to power off. 2. Unit selection key: under measuring state, press this key to switch the unit of reading between Lux and FC 3. Maximum value and minimum value selection key: under measuring state, press the key to switch between normal measurement, MAX and MIN in order of normal measurement→MAX →MIN.

  • Page 11: Setting And Operation Of Meter

    UT381/382 Instruction Manual V Setting and Operation of Meter 1. Auto power off: power off in about 10 minutes automatically ● Auto power off or not selection setting function: long press “MENU” to enter function selection menu, and then short press it to select “APO.0” or “APO.1”...
  • Page 12 UT381/382 Instruction Manual short press it to select SECREC interface, while the auto memory interval is displayed on the main display; press “RANGE/+” or “MAX/MIN/-” key to adjust the auto memory interval displayed on the main display; press “MENU” key to enter next function setting or press “HOLD”...
  • Page 13 UT381/382 Instruction Manual 3. View saved data: ● Short press “MENU” to enter view recorded data function; if there is no data record in the luminometer, “－－－－” sign will be displayed on both LCD main display and secondary display, and the luminometer will return to normal measurement state in about 0.5 seconds;...
  • Page 14 UT381/382 Instruction Manual factory defaults. ● After restoring to factory defaults, the defaulting state of the system is: USB.0 (no USB transmission); APO1 (auto power off); 60S (auto record interval is set up as 60s); clearing all data records. 5.USB data transmission function: (only for UT382, see Figure 4) ●...
  • Page 15 UT381/382 Instruction Manual Figure 4...
  • Page 16 UT381/382 Instruction Manual 6. Illuminance measuring ● In process of measuring illuminance, the sensitive mirror must be perpendicular to the measured illuminating source to ensure accuracy of measured data.. ● If distance between measured illuminating source and illuminometer, positions or different of them, or the environment is different, then the measured data will be different;...

  • Page 17: Specifications

    UT381/382 Instruction Manual VI Specifications 1. General specification ● LCD: 3 1/2-bit display, 1999-bit at most ● Over range display: “OL” ● Low voltage display: ● Type of sensor: digital visible light sensor ● Sampling rate: 100 times/s ● Power supply: one 1604A 6F22 9V battery ●...
  • Page 18 UT381/382 Instruction Manual ● Operating temperature and humidity: 0℃-30℃ (no more than 80%RH); 30℃-40℃ (no more than 75%RH); 40℃-50℃ (no more than 45%RH) ● Storage temperature and humidity: -20℃-+60℃ (no more than 80%RH) 3. Electrical specification ● Accuracy tolerance: ± (a%reading +b digits), calibrate once each year ●...
  • Page 19 UT381/382 Instruction Manual Illuminance measuring Function range Resolution Accuracy tolerance: ± ( a %reading +b digits) ± (3% + 20) 20Lux 0.01Lux Illuminance 200Lux 0.1Lux ± (3% + 8) measuring (LUX) 2000Lux 1Lux ± (3% + 8) 20000Lux 10Lux ± (3% + 8) The accuracy tolerance of FC can 0.001FC...

  • Page 20: Maintenance

    UT381/382 Instruction Manual VII Maintenance Warning During replacing battery or measuring, keep the sensitive mirror from scratch or dirt to avoid damaging the mirror or influencing the measuring precision; and do not charge the replaced battery to avoid explosion and safety accident! 1.
  • Page 21 UT381/382 Instruction Manual detergent, grinding miller and solvent are forbidden. ● When the luminometer is damaged and needs to be repaired, please send it to the designated maintenance center of our company for repair by professional service man, do not repair it without authorization.

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Ut382