UT381/382 Luminometer Instruction Manual
UT381/382 Instruction Manual Contents Chapter I UT380 Series Product Introduction Page 2 II Unpacking Inspection 3 III Safety Instruction 4 IV Meter Structure 6 V Setting and Operation of Meter 10 VI Specifications 16 VII Maintenance 19 1
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.
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 2. Instruction manual 3. USB testing line (only for UT382) 4. Software disc(only for UT382) 5. 9V battery 6.
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. Please use the luminometer according to the instructions, or the luminometer damage or personal injury may be caused.
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. Please pay attention to the “+” and “-” of the battery during installing. ● Especially keep the sensitive mirror clean and away from scratch, cover it with cap after completing measurement.
UT381/382 Instruction Manual IV Meter Structure 1.
UT381/382 Instruction Manual 2.
UT381/382 Instruction Manual 3.
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.
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” interface, and then press “RANGE/+” or “MAX/MIN/-” key to switch between “APO.0” and “APO.
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” to exit function setting. And luminometer will save the updated settings.
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.
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) ● Long press “MENU” to enter USB transmission setting, and “USB.0” or “USB.1” will be displayed on LCD; USB.0 means that data can’t be transmitted; “USB.
UT381/382 Instruction Manual Figure 4 14
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; cause, the intensity of light varies with change of distance, position, angle and environment.
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 ● Battery life: 200 hours for typical battery (alkaline battery) ● Dimensions: 195mmx 45mmx 26m ● Weight: about 185g (including battery) 2.
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 ● Environment temperature: 23℃±5℃ ● Environment humidity: ≤80% RH ● Temperature coefficient: 0.
UT381/382 Instruction Manual Illuminance measuring Function Illuminance measuring (LUX) Illuminance measuring (FC) range Resolution Accuracy tolerance: ± ( a %reading +b digits) 20Lux 200Lux 2000Lux 20000Lux 0.01Lux 0.1Lux 1Lux 10Lux 2FC 20FC 200FC 2000FC 0.001FC 0.01FC 0.1FC 1FC ± (3% + 20) ± (3% + 8) ± (3% + 8) ± (3% + 8) The accuracy tolerance of FC can be verified by unit conversion: FC=10.76lux, if accuracy tolerance verification is needed, it can be achieved by unit conversion.
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. Battery installation and replacement When “ ” is displayed on the luminometer, replace the battery immediately. Replace the battery by following procedures: ● Power off ● Loosen the screw of battery cover and take it off.
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. ● Especially in the process of using, keep the sensitive mirror of luminometer away from scratch or dirt to avoid damaging the mirror or influencing the measuring precision.
