Extech 407026 Operating Manual

User's Guide

Heavy Duty Meter
Model 407026

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 [phone] ext. 210 for authorization or visit our website at
www.extech.com (click on ‘Contact Extech’ and go to ‘Service Department’ to request an
RA number). 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.

Introduction

Congratulations on your purchase of the Extech Heavy Duty Light Meter. This light meter
offers selectable lighting types, data record/recall, relative display mode, and PC interface.
This professional meter, with proper care, will provide years of safe reliable service.

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Model 407026 Version 2.3 January 2004

Specifications

General Specifications

Custom one-chip LSI microprocessor circuit

Circuit
Display 3-1/2 digit (2000 count) LCD display with contrast adjustment
Measurement ranges LUX: 0 to 50,000 LUX (3 range); Fc: 0 to 5000 Fc (3 range);

Relative mode: 0 to 1999%
Data Hold Freezes displayed reading
Lighting Types Sodium, Daylight/Tungsten, Fluorescent and Mercury
Sensor Structure Cosine/color corrected photo-diode meets C.I.E.
Memory Store/Recall Records/Recalls Max/Min/Avg readings
Sample rate 0.4 seconds (approx.) per reading
Zero Adjust Push-button procedure
Auto Power Off After approx. 10 minutes
Data Output RS-232 PC serial interface (optional software/cable PN 407001)
Operating conditions 32 °F to 122 °F (0 °C to 50 °C); <80% RH
Power Supply 9V battery
Power consumption Approx. 5 mA DC. (approx. 200 hr battery life)
Weight 0.71 lbs. (320 g)
Dimensions Instrument: 7.1 x 2.8 x1.3" (180 x 72 x 32 mm)

Sensor: 3.3 x 2.2 x 0.7" (85 x 55 x 17.5 mm)

Range Specifications

Measurement

LUX 2,000 LUX 0-1,999 LUX 1 LUX

Foot Candles 200 Fc 0-186.0 Fc 0.1 Fc
2,000 Fc 167-1,860 Fc 1 Fc
5,000 Fc 1,670-5,000 Fc 10 Fc
Relative mode 0-1999% 1%

Range Display Resolution Accuracy

± (4% + 2 digits)

20,000 LUX 1,800-19,990 LUX 10 LUX
50,000 LUX 18,000-50,000 LUX 100 LUX

of full scale

Note: The accuracy specification above applies to calibration performed using a precision
standard incandescent tungsten light source of 2856

3

O

K with meter on the tungsten setting.

Model 407026 Version 2.3 January 2004