ATP Instrumentation 1309 User manual

DIGITAL ILLUMINANCE METER
MODEL 1309
INSTRUCTION
1
432
BAT
APO
kLux
kFc
1
2
DISABLE
HOLD
RS232 Fc Lux
MAX
HOLD
REL
M I N
APO
Auto Ranging Light Meter
LIGHT
BACK-
with RS232

2
ⅠINSTRUCTION
¾The digital illuminance meter is a precision instrument
used to measure illuminance (Lux, footcandle) in the
field.
¾It is meet CIE photopic spectral response.
¾It is fully cosine corrected for the angular incidence of
light.
¾The illuminance meter is compact, tough and easy to
handle owing to its construction.
¾The light sensitive component used in the meter is a
very stable, long-life silicon photo diode and spectral
response filter.
ⅡFEATURES
¾Light-measuring levels ranging form
0.1Lux~0.1kLux/0.01FC~0.01kFC,repeatedly.
¾High accuracy and rapid response.
¾Data-hold function for holding measuring values.
¾Unit and sign display for easy reading.
¾Automatic zeroing.
¾Meter corrected for spectral relative efficiency.

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¾Correction factor need not be manually calculated for
non-standard light sources.
¾Short rise and fall times.
¾Peak-hold function for tracing the peak signal of light
pulse with least duration 10μs and keep it.
¾Capable of selecting measuring mode in Lux or FC
scale alternatively.
¾Auto power off 20minutes.
¾Maximum and minimum measurements.
¾Relative reading .
¾Easy to read large backlit display
¾USB output connect with pc
¾Auto ranging
ⅢSPECIFICATIONS
¾Display :3-3/4 digit LCD with high speed 40 segment
bar graph.
¾Measuring Range: x,400.0 Lux,4000 Lux,40.00 KLux
and 400.0 KLux /40.00 FC,400.0 FC,4000 FC,40.00
KFC.
NOTE: 1FC=10.76Lux,1KLux=1000Lux,1KFC=1000FC
¾Over range Display: LCD will show “OL” symbol.

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¾Spectral Response: CIE Photopic. (CIE human eye
response curve).
¾Spectral Accuracy: CIE Vλfunction f1’≦6%
¾Cosine Response: f2’ ≦2%
¾Accuracy: ±5% rdg±10d.(<10,000Lux)
±10% rdg±10d.(>10,000Lux)
¾Repeatability: ±3%
¾Sampling Rate: 1.5 times/sec of analog bar-graph
indication;1.5times/sec of digital display.
¾Photo Detector: One silicon photo diode and spectral
response filter.
¾Operating temperature & Humidity :
0℃to 40℃(32℉to 104℉) & 0% to 80% RH.
¾Storage Temperature & Humidity :
-10℃to 50℃(14℉to 140℉) & 0% to 70% RH.
¾Power Source: 1 piece 9V battery.
¾Photo detector Lead Length: 150cm (approx.);
¾Photo detector Dimensions: 115L×60W×20H(mm);
¾Meter Dimensions: 170L×80W×40H;
¾Weight: 390g.
¾Accessories: Carry case, instruction manual, battery.

ⅣNAME OF PARTS AND POSITIONS
1
432
BAT
APO
kLux
kFc
1
2
DISABLE
HOLD
RS232 Fc Lux
MAX
HOLD
REL
M I N
APO
Auto Ranging Light Meter
LIGHT
BACK-
with RS232
2
1
3
10
9
8
7
4
5
6 11
12
1. LCD Display: 3-3/4 digit displays with a maximum
reading of 3999,and the indicating signs of measured
values, unit function symbols and decimal points etc are
display.
5

6
2. Auto-Ranging : It indicates 400.0 Lux,4000 Lux,40.00
KLux and 400.0 KLux /40.00 FC,400.0 FC,4000
FC,40.00 KFC total 4ranges for Lux and 4 ranges for
FC.
3. Power Control key: The power switch key turns the
illuminance meter ON or OFF.
4. Disable Auto-power off key: enable Auto-power off.
5. BACK-LIGHT key: Back light control key.
6. USB key: control to connect with pc with USB
(Note:If you press the USB key but you do not connect
with pc, the meter will wait you for connecting
with PC, if you do not want to connect with
the PC, you should restart the meter.)
7. MAX/MIN key: Maximum and minimum reading recorder
control key.
8. REL key: Relative reading control key.
9. Peak Hold key: Peak Hold recorder control key.
10. Data-Hold key: Data Hold control key.
11. Lux key: Pressing the Lux key selects taking
measurement of illuminance in Lux scale
12. FC key: Pressing the FC key selects taking
measurement of illuminance in footcandle scale;

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and,1footcandle=10.76Lux..
ⅤOPERATING INSTRUCTIONS
1. Power-up: Press the power key to turn the meter ON or
OFF.
2. Selecting the Lux or FC scale: Set the range selection
switch to desired Lux or FC range.
3. Remove the photo detector cap and face it light source
in a horizontal position.
4. Read the illuminance nominal from the LCD display.
5. Over range: If the instrument only displays “OL”, the
input signal is too strong, and a higher range should be
Auto selected.
6. Data-Hold mode: Press the hold key to select Data-Hold
mode. When HOLD mode is selected, the illuminance
meter stops all further measurements. Press the HOLD
key again to exit Data-Hold mode. Then it resumes
normal operation.
7. Peak-Hold recorder mode: Press and hold down PEAK
key until display shown the “CAL” letter, then press
PEAK key cycle through Pmax and Pmin recorder mode,
and expose the photo detector to light pulse measuring

8
8. Maximum and Minimum recorder mode: Press
MAX/MIN key to cycle through Maximum (MAX) reading,
Minimum (MIN) reading and current reading (MAX/MIN
blink) recorder mode. Press MAX/MIN key again to exit
this mode.
9. Relative reading mode: Press REL key to enter Relative
mode. The display shown zero value and the current
reading will be stored as a zero-in value. Press again to
exit this mode.
10. USB mode: connect with pc with USB
11. Back-light function: Press the Backlight key to turn
on. Press again to turn off.
12. When the measurement is completed, replace the photo
detector cap and turn the meter off.
ⅥBATTERY CHECK-UP & REPLACEMENT
1. As the battery power is not sufficient, LCD will display
low battery, and replacement of one new battery is
required.

2. After turning off the meter, disconnect the battery cover
with a screwier.
3. Disconnect the battery from the instrument and replace
it with a standard 9V battery and go for the cover.
ⅦSPECTRAL SENSITIVITY CHARACTERISTIC
¾To the detector, the applied photo diode with filters
makes the spectral sensitivity characteristic
almost meet C.I.E.(INTERNATIONAL
COMMISSION ON ILLUMINATION) Photo
curve V (λ) as the following chart described.
ⅧMAINTENANCE
1. The white plastic disc on the top of the detector should
be cleaned with a damp cloth when necessary.
2. Do not store the instrument where temperature or
humidity is excessively high.
3. The reference level, as marker on the face plate, is the
9

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tip of the photo detector globe.
4. The calibration interval for the photo detector will vary
according to operational conditions, but generally the
sensitivity decreases in direct proportion to the product
of luminous intensity by the operational time. In order to
maintain the basic accuracy of the instrument, periodic
calibration is recommended.
ⅨRECOMMENDED ILLUMINATION
1FC=10.76Lux
LOCATIONS Lux FC
OFFICE Conference,
Reception room
200~750 18~70
Clerical work 700~1,500 65~140
Typing drafting 1,000~2,000 93~186
FACTORY Visual work at
production line
300~750 28~70
Inspection work 750~1,500 70~140
Electronic parts
assembly line
1,500~3,000 140~279