UNI-T UT381 Instruction Manual Download Page 19

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UT381/382 Instruction Manual

Illuminance measuring

Function range Resolution

Accuracy tolerance: ± ( a %rb digits)

Illuminance

measuring

(LUX)

Illuminance

measuring

(FC)

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.

20Lux
200Lux
2000Lux
20000Lux

2FC
20FC
200FC
2000FC

0.01Lux
0.1Lux
1Lux
10Lux

0.001FC
0.01FC
0.1FC
1FC

± (3% + 20)
± (3% + 8)
± (3% + 8)
± (3% + 8)

Summary of Contents for UT381

Page 1: ...Luminometer Instruction Manual UT381 382 ...

Page 2: ...ion Manual 1 2 3 4 6 10 16 19 Contents Chapter Page I 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: ...t in Britain and USA and meter candle in Europe 1 foot candle means the illuminance received on the surface from the direct 1 candle light source with 1 foot away from the illuminated surface abbreviated as FC In the same way 1 meter candle means the illuminance received on the surface from the direct 1 candle light source with 1 meter away from the illuminated surface abbreviated as Lux UT380 ser...

Page 4: ...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 Software disc only for UT382 1 piece 5 9V battery 1 piece 6 Sensitive mirror cap 1 unit ...

Page 5: ... luminometer damage or personal injury may be caused In order to avoid luminometer damage and personal injury please operate according to following instructions Check if luminometer shell is broken or any part loss before using Do not use the meter if it is damaged When battery indicating sign appears please replace battery as soon as possible to avoid measured data error When the luminometer work...

Page 6: ...out 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 ...

Page 7: ...1 Sensitive mirror 2 Mainframe 3 Display screen 4 Keyboard 6 UT381 382 Instruction Manual IV Meter Structure 1 Meter structure Figure 1 Table 1 Figure 1 Table 1 ...

Page 8: ...Data hold sign Main display Full storage display sign Auto power off sign USB communication UT382 only Low voltage sign record number Secondary display Data record storage sign nstruction of reading 10 Illuminance unit Lux Illuminance unit Britain and USA 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 MIN Auto MAX HOLD FULL USB LoadNo REC Table 2 ...

Page 9: ...8 UT381 382 Instruction Manual 3 Keys description Figure 3 Figure 3 1 2 3 4 5 6 7 ...

Page 10: ... key to enter manual range state press once again to enter low range and high range one by one long press the key to return to auto range state 5 Data memory and delete key press this key to save measured data automatically or manually the biggest storage capacity 2044 pieces press this key and power on the meter at the same time you can delete the recorded data 6 Menu key long press this key to e...

Page 11: ...minometer will record the updated settings Under the state that APO 0 is selected auto power off function is closed namely the meter won t be power off automatically under the state that APO 1 is selected auto power off function is selected and the auto power off sign is displayed on the screen at the same time After power off the luminometer will record the settings which will be restored after i...

Page 12: ... the measured data according to the current auto saving interval setting if the storage space of luminometer is fully taken up the system will exit auto memory and FULL sign will be displayed on LCD press REC ERASE key to exit auto data memory function Manual data memory in the normal measurement state press REC ERASE once to save one measured data and REC sign displayed on LCD SECREC flashes once...

Page 13: ...ntering option of view recorded data press UNIT to view the 1st piece of recorded data press RANGE and MAX MIN keys to view data records forward or backward press HOLD key once and then your reading will jump over 100 pieces of record forward when there isn t over 100 pieces of record after current record press this key to return to the 1st record The luminometer can store 2 044 pieces of records ...

Page 14: ... 1 will be displayed on LCD USB 0 means that data can t be transmitted USB 1 means that data can be transmitted press RANGE or MAX MIN key to switch between USB 0 and USB 1 Each time after the system is power on the USB function of the luminometer is set as USB 0 no data transmission state automatically The communication between luminometer UT382 and PC is realized by USB data transmission thus PC...

Page 15: ...14 UT381 382 Instruction Manual Figure 4 ...

Page 16: ...rent cause the intensity of light varies with change of distance position angle and environment Since the intensity of light will be varied with its distance position angle and surroundings to illuminometer measured date will be different accordingly Make sure there is no scratch or dirt on sensitive mirror of luminometer or the measured data won t be accurate When the illuminance exceeds the meas...

Page 17: ... 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 Environment limit Indoor use Safety standards EN61326 2006 EN55022 1998 A1 A2 EN55024 1998 A1 A2 Pollution grade grade 2 ...

Page 18: ...0 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 1 accuracy tolerance ...

Page 19: ...inance measuring LUX Illuminance measuring FC 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 20Lux 200Lux 2000Lux 20000Lux 2FC 20FC 200FC 2000FC 0 01Lux 0 1Lux 1Lux 10Lux 0 001FC 0 01FC 0 1FC 1FC 3 20 3 8 3 8 3 8 ...

Page 20: ...nd 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 Replace with a new 6LF22 9V 1604A battery please use battery with the same model and do not use unauthorized battery Pay attention to the anode and the cathode After completing installation install the cover and ...

Page 21: ... 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 Remove the battery if it won t be used for a long time Store the luminometer in a place free of moist high temperature and strong magnetic field Specifications and other information shown on this i...

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