Extech Instruments 401025 User Manual page 4

Replacing the Battery
When the LO BAT icon appears, replace the battery promptly.
1. Open the rear battery compartment and remove the old battery.
2. Replace with a new 9V battery (observing correct polarity).
3. Secure the battery compartment before use.
Safety: Please dispose of batteries responsibly and in accordance with all applicable laws and
regulations; never dispose of batteries in a fire, batteries may explode or leak.
Specifications
General Specifications
Display
Measurement units
Ranges (see range table below)
Sensor
Zero adjust
Sampling time
Response Time
Over input indication
Analog Output
Operating Temperature
Operating Humidity
Power Supply
Power Current
Weight
Dimensions
Range Specifications
Lux
Range
2,000 Lux
20,000 Lux
50,000 Lux
Foot-candle (Fc)
Range
200 Fc
2,000 Fc
5,000 Fc
0.5 in. (13 mm) LCD
Lux, Ft-candle (Fc)
Lux: 0 to 50,000 Lux in 3 ranges
Foot-candle: 0 to 5,000 Fc in 3 ranges
Photo diode with cosine and color correction, designed to meet CIE
Manual front panel adjustment
Approx. 0.4 seconds
Fast: 0.4 seconds; Slow: 2 seconds
Indication of "1__"
0.1 mV per digit (maximum: 200 mV DC)
32 O F to 122 O F (0 O C to 50
80% RH maximum
9V DC battery
Approx. 2 mA DC
0.52 lbs. (220 g)
Main instrument: 6.4 x 2.8 x 1.2 in. (163 x 70 x 30 mm)
Sensor: 3.2 x 2.2 x 0.5 in. (85 x 55 x 12 mm)
Display range
0 to 1,999 Lux
2,000 to 19,990 Lux
20,000 to 50,000 Lux
Display range
0 to 199.9 Fc
200 to 1,999 Fc
2,000 to 5,000 Fc
4
O C)
Resolution
1 Lux
10 Lux
100 Lux
Resolution
0.1 Fc
1 Fc
10 Fc
401025_UM_en-US_v3.0 11/24
Accuracy (Full Scale)
± (5% + 2digits)
± (5 % + 2digits)
± (5 % + 2digits)
Accuracy (Full Scale)
± (5% + 2digits)
± (5% + 2digits)
± (5% + 2digits)