Extech 401027 Operating Manual

User's Manual

Model 401027
Pocket Foot Candle Light Meter

Introduction

Congratulations on your purchase of the Extech Pocket Foot Candle Light Meter which
measures and displays light intensity in foot candle units. Two ranges can be selected
(200.0 and 2000 Fc). The precision color-corrected photo-diode sensor provides 5%
accuracy.

Specifications

Circuit Custom LSI microprocessor based design
Display 0.5" (13mm) 3-1/2 digit (1999 count) LCD display
Sensor Photo-diode with color correction filter (meets CIE regulations)
Out of range indication '1 ' is displayed
Sampling time Approx. 0.4 seconds
Power Supply 9V battery
Power consumption Approx. 2.7mA
Operating temperature 32oF to 122oF (0oC to 50oC)
Operating Humidity < 80% RH
Weight 0.43 lb. (195g)
Dimensions Meter: 5.2x2.8x1" (131x70x25mm);

Accessories Probe and 9V battery

Range Specifications

Range Resolution Accuracy

0 to 199.9 Fc 0.1 Fc
200 to 1999 Fc 1 Fc

Probe: 3.2x2.2x0.3" (82x55x7mm)

± (5% + 4 digits) Full Scale

Meter Description

1. Display

2. ON/OFF switch

3. Range switch

4. Light sensor

1

2

3

4

Meter Operation

1. Slide the ON/OFF Switch to the ON position.

2. Fold out the meter's rear tilt stand and set the meter on a desktop.

3. Select range "B"

4. Hold the Light Sensor with the white lens facing the light source to be measured. The
sensor can also be placed on the desktop facing in the direction of the light source.

5. Read the light measurement on the LCD display.

6. If the measurement is less than 200 fc, select the lower ”A” range

2

401027 V2.0 6/08