3

401020 and 401021

Ver. 1.03 11/99

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.

Lighting Type

Multiplication Factor

MERCURY LAMP

x1.14

FLUORESCENT

LAMP

x1.08

DAYLIGHT

x1.00

SODIUM

x1.22

METAL HALIDE

x1.00