Unit UT381 User manual

I Overview
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 ÀX[ 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. 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 /X[. UT380 series can test illuminance within 020,/X[, and UT382 can
be connected with PC to realize real-time data storage and analysis, and the data
recorded in luminometer can be transmitted to PC to analyze, print and record, etc.
II Unpacking Inspection
Unpack and check, if there is any damage or loss, contact with the nearest local
sales service agency
1. Mainframe 1 pc
2. Instruction manual 1 pc
3. USB testing line (only for UT382) 1 pc
4. Software disc(only for UT382) 1 pc
5. 9V battery 1 pc
6. Sensitive mirror cap 1 pc
III Safety Instruction
Warning
Actions and conditions that may pose hazard to the user or may cause
damage to the Luminometer.
please use the luminometer as specified in the manual, otherwise it may cause
damage to the luminometer or personal injury. In order to avoid luminometer
damage and personal injury, please operate according to following instructions.
ƔCheck if luminometer shell is broken or any part is lost before using. Do not
use the meter if it is damaged.
ƔWhen battery indicating sign “ ” appears, please replace battery as soon
as possible to avoid measured data error.
ƔWhen the luminometer works abnormally, do not use it, and please send it to
the designated maintenance center of our company for repair by professional
personnel.
ƔPlease do not use it in the place adjacent to H[SORVLYH gas, steam and dust.
ƔDo not dismantle the shell of luminometer without authorization to avoid
luminometer damage.
ƔDo not charge the battery to avoid battery H[SORVLRQ and personal injury.
Please pay attention to the “+” and “-” of the battery during installing.
ƔEspecially keep the sensitive mirror clean and away from scratch, cover it
with cap after completing measurement.
1 Sensitive mirror
2 Mainframe
3 Display screen
4 Keyboard
IV Meter Structure
1. Meter structure (Figure 1,Table 1)
Figure 1
Table 1
2. Display symbols (Figure 2, Table 2)
Figure 2
Auto range
Minimum value display
0D[LPXP value display
Data hold
Main display
Full storage display
Auto power off
USB communication (UT382 only)
Low battery Indication
record number
Secondary display
Data record storage
Indicator for "reading ×10"
Illuminance unit /X[)
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
3.Keys description (Figure 3 )
Figure 3
1
2
3
4
5
6
7
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 /X[ and FC
3. 0D[LPXPDQGPLQLPXPYDOXHV selection key: under measuring state, press
the key to switch IURPQRUPDOPHDVXUHPHQWĺ0$;ĺ0,1PRGHV
When “M$;”or“MI1´ sign is displayed on LCD, the luminometer just displays
PD[LPXPRUPLQLPXPUHDGLQJ
4. Auto range and Manual range selection key: in auto range state, press the 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 luminometer can save up to 2044 sets. 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 enter the function setting mode; short press to
DFFHVV86%ĺ$32ĺ6(&ĺ&2'(ĺ'()"ĺ1RUPDOPHDVXUHPHQW
press H2LD key to H[Lt menu mode.
7. Data hold key: press this key to lock the measured data display on LCD, and
display “H2LD” sign at the same time; press this key again to H[Lt hold function.
V Setting and Operation
1. Auto power off: power off in about 10 minutes automatically
ƔAuto power off or not selection setting function: long press “ME18´ to enter
function selection menu, and then short press it to select “$320” or “$321”
interface, and then press “RA1GE/+” or “M$;MI1/-” key to switch between
“$320” and “$321”; press “ME18´ key to enter QH[t function setting or
press “H2LD” key to H[Lt function setting, and luminometer will record the
updated settings.
Ɣ:KHQ$32LVVHOHFWHG, auto power off function is closed, namely, the
meter won’t be power off automatically; LI$32LVDSSOLHGDXto 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 it is power on, it is unnecessary to set
up again at each time.
2. Data memory and delete: auto and manual data memory
ƔThe interval of auto data memory is within 0.5-255 seconds, which is

31;
adjustable; long press “ME18´ to enter function selection menu, and then
short press it to select SECREC interface, while the auto memory interval is
displayed on the main display; press “RA1GE/+” or “M$;MI1/-” key to adjust
the auto memory interval; press “ME18´ key to enter QH[t function setting or
press “H2LD” to H[Lt function setting. And luminometer will save the updated
settings.
ƔLong press “REC/ERASE” to save data automatically, and “REC” sign
on secondary display ÀDVKHV, and the luminometer will save the
measured data according to the current auto saving interval setting; if the
storage space of luminometer is fully taken up, the system will H[Lt auto
memory; and “FULL” sign will be displayed on LCD; press “REC/ERASE” key
to H[Lt auto data memory function.
ƔManual data memory: in the normal measurement state, press “REC/ERASE”
once to save one measured data, and “REC” sign displayed on secondary
display ÀDVKHV once.
ƔWhen 2044 pieces of data is fully recorded, “FULL” sign will be displayed on
LCD, and no data can be saved at this moment.
ƔUnder power-off state, press “REC/ERASE” and power on meanwhile, when
“CLR” sign is displayed on LCD, all saved data will be cleared.
3. View saved data:
ƔShort press “ME18´ to enter view recorded data function; if there is no
data record in the luminometer, “ˉˉˉˉ” sign will be displayed on both LCD
main display and secondary display, and the luminometer will return to normal
measurement state in about 0.5 seconds; If there a certain data records in
the luminometer, the total number of current data records will be displayed on
LCD secondary display, and the value of the last piece of data will be
displayed on the main display.
ƔAfter entering option of view recorded data, press ³81IT” to view the 1st
piece of recorded data; press “RA1GE/+” and “M$;MI1/-” keys to view data
records forward or backward; HDFKSUHVVRQ+2/'EXWWRQWRLQFUHPHQWE\
VHWVWKHPHWHUZLOOUHWXUQWRWKHILUVWUHFRUGZKHQWKHPD[LPXPQXPEHU
has been reached.
ƔThe luminometer can store up to 2044 records.
4. Restore to factory defaults:
ƔLong press “ME18´ key to enter function setting, and then short press this
key to select '()"RSWLRQ and “DEF"´ sign displays on the LCD and
ÀDVKHV, at this moment you can press “H2LD” to restore to factory defaults;
press “ME18´ or “REC/ERASE” WRH[LW
ƔAfter restoring to factory defaults, the defaulting state of the system is: USB.0
(no USB transmission); $321 (auto power off); 60s (auto record interval is
set up as 60s); clearing all data records.
5.USB data transmission function: (only for UT382, See Figure 4)
ƔLong press “ME18´ to enter USB
transmission setting, and “USB.0” or
“USB.1” will be displayed on LCD;
USB.0 means that data can’t be
transmitted; “USB.1” means that data
can be transmitted; press “RA1GE/+”
or “M$;MI1/-” key to switch between
“USB.0” and “USB.1”.
ƔThe meter is set to "USB.0" mode
automatically every time it is powered on.
ƔThe luminometer (UT382) communicates
with PC using USB wire and your PC must
have a USB port. See Figure 4 for the
connection diagram.
ƔWhen connecting UT382 to the computer,
you cannot operate any functional buttons
during transmission. Figure 4
6. Illuminance measurement
ƔIn process of measuring illuminance, the sensitive mirror must be
perpendicular to the measured illuminating source to ensure accuracy of
measured data..
ƔIf distance between measured illuminating source and illuminometer,
measuring position, angle or environment is different, then the measured
data will be different; because the intensity of light varies with change of
distance, position, angle and environment.
ƔMake sure there is no scratch or dirt on sensitive mirror of luminometer, or
the measured data won’t be accurate.
ƔWhen the illuminance H[FHHGV the measuring range of the luminometer, “2L”
sign will be displayed.
ƔAfter completing measuring, cover the sensitive mirror with cap to avoid
scratch on sensitive mirror and keep it clean.
VI SpecL¿cations
1. General VSHFL¿FDtion
ƔLow battery indication:
ƔType of sensor: digital visible light sensor
ƔSampling rate: 100 times/s
ƔPower supply: one 1604A 6F22 9V battery
ƔBattery life: 200 hours for typical battery (alkaline battery)
ƔDimensions: PP[ PP[ 26m
ƔWeight: about 185g (including battery)
2. Environment limit
ƔIndoor use
ƔSafety standards: E1: 2006;
E1: 1998+A1+A2;
E1: 1998+A1+A2
ƔPollution degree 2
Ɣ2perating temperature and humidity:
ćć (no more than 80%RH);
ćć (no more than 75%RH);
ćć (no more than 45%RH)
ƔStorage temperature and humidityćć (no more than 80%RH)
3. Electrical VSHFL¿FDtion
ƔAccuracy tolerance: ± (a%reading +b digits), calibrate once each year
ƔEnvironment temperature: ćfć
ƔEnvironment humidity80% RH
ƔTemperature coef¿FLHQt: 0.1× (accuracy tolerance)/ć
Illuminance measurement
Function Range Resolution Accuracy Tolerance: ± ( a %reading +b digits)
Illuminance
measuring
(LU;)
Illuminance
measuring
(FC)
The accuracy tolerance of FC can
be YHUL¿HG by unit conversion:
FC=10.OX[, if accuracy tolerance
YHUL¿FDtion is needed, it can be
achieved by unit conversion.
20Lu[
200Lu[
2000Lu[
20000Lu[
2FC
20FC
200FC
2000FC
0.01Lu[
0.1Lu[
1Lu[
10Lu[
0.001FC
0.01FC
0.1FC
1FC
± (3% + 20)
± (3% + 8)
± (3% + 8)
± (3% + 8)
VII Maintenance
Warning
During replacing battery or measuring, keep the sensitive mirror from scratch or
dirt to avoid damaging the mirror or LQÀXHQFLQJ the measuring precision; and do
not charge the replaced battery to avoid H[SORVLRQ and safety accident!
1. Battery installation and replacement
When “ ” is displayed on the luminometer, replace the battery immediately.
Replace the battery by following procedures:
ƔPower off
ƔLoosen the screw of battery cover and take it off.
ƔReplace with a new 6LF22 9V 1604A battery, please use battery with the
same model, and do not use unauthorized battery.
ƔPay attention to the anode “+” and the cathode “-”. After completing
installation, install the cover and tighten the screw.
2. General maintenance
ƔWhen the surface of luminometer is dirty, clean with wet cloth and neutral
detergent, grinding miller and solvent are forbidden.
ƔWhen 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.
ƔEspecially in the process of using, keep the sensitive mirror of luminometer
away from scratch or dirt to avoid damaging the mirror or LQÀXHQFLQJ the
measuring precision.
ƔRemove the battery if it won’t be used for a long time.
ƔStore the luminometer in a place free of moist, high temperature and strong
magnetic ¿HOG.
SSHFL¿FDtions and other information shown on this instruction manual are subject
to change without notice
ƔLCD: 3 1/2-bit display, 2000-count.
Ɣ2ver range display: “2L”