Specifications 13
Specifications
Functions and use
The testo 540 is an illuminance measuring instrument. It is
normally used to measure illuminance, e.g. at workplaces.
Technical data
Measurement data
· Sensor:
Photo diode
· Parameters:
Lux (lm/m
2
), foot candle (lm/ft
2
)
· Measuring ranges:
0...99999 Lux, 0...9300 ftc
· Resolutions:
1 Lux (0...19,999 Lux), 10 Lux (rest of
range)
0.1 ftc (0...1,860 ftc), 1 ftc (rest of
range)
· Accuracies (Nominal temperature
25 °C, ±1 Digit):
± 3 Lux or ± 3 % to reference (Class B,
DIN 5032 part 7)*
· Measuring rate:
0.5 s
* whichever is the greater
Further instrument data
· Protection class: IP40
· Ambient conditions:
0...50 °C, 32...122 °F
· Storage/transport conditions:
-40...70 °C, -40...158 °F
· Voltage supply:
2x 1.5 V type AAA
· Battery life:
200 h (without display light)
· Dimensions:
133x46x25mm / 5.2x1.8x1.0 in (inc.
protection cap)
· Weight: 95 g / 3.4 oz (inc. batteries and
protection cap)
Directives, standards and tests
· EC Directive:2004/108/EEC
Warranty
· Duration: 2 years, warranty conditions:
see www.testo.com/warranty
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