2. SPECIFICATIONS
2.1 Electrical Specifications
Accuracy
Sensor
Operating
Temperature/humidity
Power Supply
Power Consumption
Low battery indication
Dimensions / Weight
2.2 Range Specifications
Range
1
2
3
401020
Measurement
Output to DMM
0 to 2000 Lux
0.1mV per 1 Lux
2000 to 20,000 Lux 0.1mV per 10 Lux
20k to 50k Lux
0.1 mV per 100 Lux
401021
Measurement
Output to DMM
0 to 200 Fc
1mV per 1 Fc
200 to 2000 Fc 0.1mV per 1 Fc
2000 to 5000 Fc 0.1mV per 10 Fc
± (5% + 1mV)
Exclusive photo diode & color correction filter
spectrum designed to meet C. I. E.
o
o
o
32 F to 122 F (0C to 50 C) / <90% RH
006P DC 9V battery
Approx. 6 mA DC
Status LED on Front panel of Adaptor
3.9x1.9x1" (100x50x25mm) / 0.33 lbs. (150g)
2.3 Frequency Spectrum
3. FRONT PANEL DESCRIPTION
1 Power ON status LED
2 Low battery status LED
3 Power ON / Range select switch
4 Light sensor
5 Meter to sensor connect cable
6 DMM banana connector plugs
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4. OPERATION
4.1 Insure that a fresh battery is installed in the adapter by moving the Power/Range
Select switch from the OFF position to one of the range select positions. If the Power
ON light doesn't glow or if the Low Battery LED does glow, check the battery.
4.2 Connect the adapter to the COMMON and VOLTAGE inputs of a multimeter via the
adapter's banana plugs. The polarity of the connection should be reversed if a negative
light level reading is indicated on the multimeter.
4.3 Set the mulitmeter to the mV or higher DC voltage position. Adjust the range to suit
your display needs. Do not use autorange if possible.
4.4 Select the maximum range via the Range Select Switch and move lower in range as
needed.
4.5 Hold the Light Sensor so that it faces the light source to be measured. The
multimeter's display will indicate light level readings. Refer to Sections 5 and 6 for
additional measurement considerations.
5. CORRECTION FACTOR FOR DIFFERENT TYPES OF LIGHTING
The light adapter is calibrated using a
precise "Standard tungsten light source
of 2856oK". If the meter is to measure
a different type of lighting, the
correction factor table, below, should
be applied to the readings. Multiply the
multimeter readings by the factors in
the right column for a particular lighting
type shown in the left column.
6. RANGE SELECTION
The meter has three measurement ranges (0-200, 0-2000, and 0-5000 Fc) or (0-2000, 0-
20000, and 0-50000) Lux). The proper range selection will produce the most accurate
reading. Always select the range that produces the maximum number of digits without
exceeding the maximum count for that particular range. For example, a reading of 1456 Fc
should be read on the 0 - 2000 range, not the 0-5000 range.
7. BATTERY REPLACEMENT
When the Low Battery status LED glows, replace the battery as soon as possible. Open
the Battery Compartment by removing the rear screw. Remove the battery, replace it
with a fresh 9V battery and re-assemble the meter.
8. CALIBRATION / REPAIR SERVICES
Extech offers complete repair and calibration services for all of the products we sell. For
periodic calibration, NIST certification or repair of any Extech product, call customer
service for details on services available. Extech recommends that calibration be performed
on an annual basis to insure calibration integrity.
9. WARRANTY
EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and
workmanship for one year from date of shipment (a six month limited warranty applies on sensors and
cables). If it should become necessary to return the instrument for service during or beyond the warranty
period, contact the Customer Service Department at (781) 890-7440 for authorization. A Return
Authorization (RA) number must be issued before any product is returned to Extech. The sender is
responsible for shipping charges, freight, insurance and proper packaging to prevent damage in transit.
This warranty does not apply to defects resulting from action of the user such as misuse, improper wiring,
operation outside of specification, improper maintenance or repair, or unauthorized modification. Extech
specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not
be liable for any direct, indirect, incidental or consequential damages. Extech's total liability is limited to
repair or replacement of the product.
The warranty set forth above is inclusive and no other warranty, whether written or oral, is expressed or
implied.
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Lighting Type
MERCURY LAMP
FLUORESCENT
LAMP
DAYLIGHT
SODIUM
METAL HALIDE
Multiplication Factor
x1.14
x1.08
x1.00
x1.22
x1.00
TYPICAL LIGHT LEVELS
Lux
20-75
75-150
150-300
300-750
750-1,500
1,500-3,000
75-100
100-200
200-750
Foot
Candles
2-7
7-15
15-30
30-75
75-150
150-300
7-10
10-20
20-75
Factories
Emergency Stairs, Warehouse
Exit/Entrance Passages
Packing Work
Visual Work: Production Line
Typesetting: Inspection Work
Electronic Assembly, Drafting
Office
Indoor Emergency Stairs
Corridor Stairs
Conference, Reception Room
Lux
100-150
150-200
200-300
300-500
500-1,500
1,000-2,000
75-150
150-300
300-750
750-1,500
Foot
Candles
10-15
15-20
20-30
30-50
50-150
100-200
7-15
15-30
30-75
75-150
Home
Washing
Recreational Activities
Drawing Room, Table
Makeup
Reading, Study
Sewing
Restaurant
Corridor Stairs
Entrance, Wash Room
Cooking Room, Dining
Table
Show Window
750-1,500
75-150 Clerical Work
1,500-2,000 150-2000 Typing, Drafting
Store
75-150
7-15
Indoors
150-200
15-20 Corridor/Stairs
200-300
20-30 Reception
300-500
30-50 Display Stand
500-750
50-75 Elevator
750-1,500
75-150 Show Window, Packing Table
1,500-3,000 150-300 Storefront, Show Window
COMMON CONVERSION FACTORS
Illuminance (Visible Flux Density)
Hospital
30-75
3-7
Emergency Stairs
75-100
7-10
Stairs
100-150
10-15 Sick Room, Warehouse
150-200
15-20 Waiting Room
200-750
20-75 Medical Exam Room
750-1,500
75-150 Operating Room
5,000-10,000 500-1000 Eye Inspection
1 lm/m2 = 1 lux (lx)
10-4 lm/cm2
10-4 phot (ph)
9.290 x 10-2 lm/ft2
9.290 x 10-2 foot-candles
Luminance (Visible Flux Density per Solid Angle)
Luminous Intensity (Visible Flux per Solid Angle)
Luminous Flux ( Visible Flux)
1 lm/m2/sr = 1 candela/m2
1 lm/sr = 1 candella
1 lumen (lm) = 1.464 x 10-3 watts @ 555 nm
Copyright
©
1999 Extech Instruments Corporation. All rights reserved
including the right of reproduction in whole or in part in any form.
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