RS PRO ILM 1335 User manual

User Manual

RS PRO ILM 1335

stock number: 123-2221

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TABLE OF CONTENTS

TITLE PAGE

1. INTRODUCTION .........................................................1

2. FEATURES..................................................................2

3. SPECIFICATIONS.......................................................3

4. METER DIAGRAM ......................................................5

5. OPERATING INSTRUCTIONS....................................7

6. SETTING THE CALIBRATION FACTOR (CAL).........9

7. SETTING THE SPECTRAL CORRECTION FACTOR

(SCF)..........................................................................10

8. BATTERY CHECK & REPLACEMENT ....................12

9. SPECTRAL SENSITIVITY CHARACTERISTICS.....13

10. MAINTENANCE ......................................................14

11. RECOMMENDED ILLUMINATION..........................15

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1. INTRODUCTION

•

The ILM 1335 digital light meter is a precision instrument

used to measure illuminance (lux, footcandle).

•

It meets CIE photopic spectral response.

•

It is fully cosine corrected for the angular incidence of light.

•

The meter is a compact, tough and easyto use instrument.

•

The light sensitive component used in the meter is a very

stable, long-life silicon photodiode and spectral response

filter.

•

U.S. Pat. No. Des. 446,135

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2. FEATURES

•

Light measurement ranging from 0.01 lux ~ 0.1 klux / 0.01

fc ~ 0.01 kfc, respectievely.

•

High accuracy and rapid response.

•

Data-hold function

•

Digital and analogue graphical display

•

Automatic zeroing

•

Meter corrected for spectral relative efficiency.

•

No manual correction factor calculations for non-standard

light sources.

•

Short rise and fall times

•

Peak-hold function

•

Selectable scale – Lux or fc

•

Auto power off after 30 minutes

•

Maximum and minimum measurements

•

Relative reading function

•

User calibration factor (CAL) and spectral correction factor

(SCF) function. (include LED)

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3. SPECIFICATIONS

•

Display：

3-3/4 digitLCD with high speed42 segmentbargraph.

•

Measuring Range：40.00 lux, 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=10.76 lux , 1klux=1000 lux , 1kfc=1000 fc

•

Overrange Display：LCD will show “OL” symbol.

•

Spectral Response : CIE Photopic. (CIE human eye

response curve).

•

Spectral Accuracy : CIE Vλfunction f ’1≦6%

•

Accuracy：±3% rdg ±0.5% f.s.（±4% rdg ±10 dgts as >

10,000 lux/fc range）.

(calibrated to standard incandescent lamp at colour

temperature 2856 K).

•

Repeatability：±2%.

•

Temperature Characteristics：±0.1%/

°C.

•

Sampling Rate : 13.3 times/sec for analogue bar-graph

indication ; 1.3 times/sec for digital

display.

•

Photo Detector：Silicon photo diode and spectral

response filter.

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•

Operating Temperature & Humidity：

0 to 40°C（32 to 104°F）& 0% to 80% RH.

•

Storage Temperature and Humidity：

-10 to 50°C（14 to 140°F）& 0% to 70% RH.

•

Power Source：6 x 1.5V AAA batteries

•

Battery life ( typical )：400 hours ( zinc-carbon ).

•

Photo detector Lead Length：150 cm ( approx. ).

•

Photo detector Dimensions：92

29 mm

•

Meter Dimensions：150

35 mm

•

Weight：320g.

•

Accessories：Carrycase, instruction manual and battery.

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4. METER DIAGRAM

lux fc

Klux

Kfc

1. LCD Display：3-3/4 digit display with a maximum reading of

3999, and the indicating signs of measured

values, unit function symbols, and decimal

points etc are displayed.

2. ON/OFF button.

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3. Range Selector button: Sequential selection of 40.00 lux,

400.0 lux, 4000 lux, 40.00 klux,

400.0 klux or 40.00 fc, 400.0 fc,

4000 fc, 40.00 kfc. Total of 5 range

for lux and 4 range for fc.

4. Data-Hold button

5. Peak Hold button

6. MX/MN button: Maximum and Minimum reading recall

7. Lux button：Pressing the “Lux” button selects taking

measurement of illuminance in lux.

8. Relative Reading button

9. fc button：Pressing the “fc” button selects measurement of

illuminance in footcandle scale; and, 1 footcandle

10.76 lux.

10. Photo Detector.

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5. OPERATING INSTRUCTIONS

1. Power-up：Press the power button 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 hold the sensor towards

the light source in a horizontal position.

4. Read the illuminance nominal from the LCD display.

5. Overange：If “OL” is shown on the display, the input signal is

too strong and a higher range should be selected.

6. Data-Hold mode：Press the “HOLD” button to select

Data-Hold mode. When HOLD mode is selected, the

illuminance meter stops all further measurements.

Press the “HOLD” button again to exit DATA-HOLD mode

and continue taking readings.

7. Peak-Hold recorder mode：Press “PEAK” button to enter the

P+ recorder mode, and expose the photo detector to light

pulse measuring field. Press “PEAK” button again to exit

PEAK recorder mode, then the meter will resume normal

operation.

8. Maximum and Minimum record mode：Press “MX/MN”

button to cycle through Maximum (MX) reading, Minimum

(MN) reading and current reading (MX/MN blink) recorder

mode. Press “MX/MN” button for two seconds to exit this

mode.

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9. Relative reading mode：Press “△REL” button to enter

Relative mode. The display will show zero and the current

reading will be stored as the zero reference value. Press

again to exit this mode.

10. When the measurement is completed, replace the photo

detector cap and turn the meter off.

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