User Manual

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6. TECHNICAL CHARACTERISTICS
6.1. REFERENCE CONDITIONS
Quantity of inuence Reference values
Temperature 20 ± 3 °C
Relative humidity 45 to 55%RH
Internal supply voltage 2.4 ± 0.2V
External supply voltage 110 to 240V 50/60Hz
Electric eld < 1V/m
Magnetic eld < 40A/m
The intrinsic uncertainty is the error specied for the reference conditions.
It is expressed as a percentage of the reading ± display points.
6.2. ELECTRICAL CHARACTERISTICS
6.2.1. TYPES OF INPUT
Type of input
Measurement
range
Resolution
Intrinsic uncer-
tainty
Input impedance
Max. sampling
rate
DC voltage
± 100mV 0.1mV ±(0,5% + 1 ct) 1 MW 5 samples / s
± 1V 1mV ±(0,5% + 1 ct) 1 MW 5 samples / s
± 10V 10mV ±(0,5% + 1 ct) 1 MW 5 samples / s
DC current 4 to 20mA 0.01mA ±(0,25% + 5 ct) 100 W 5 samples / s
Pulse ± 10V - -
-
100 samples / s
Event ± 10V - - 1 MW 16 samples / s
Output voltage for the pulse input: 3.3V (with 1 MΩ pull up resistor);
6.3. POWER SUPPLY
The instrument can be powered:
 by rechargeable batteries (2 x 1,2 V 2,400mAh NiMH)
 by mains (110 to 240 V, 50/60Hz), via a USB cable.
When the instrument is off (and not on standby), pressing the On/
Off key displays the remaining capacity of the batteries.
To save the batteries, the instrument switches to standby at the end of 20 minutes with no key press. This does not prevent the
instrument from continuing to make measurements. Simply press the
key to switch it back to full on.
The maximum consumption of the L452 is 2.5W.
When the instrument is off, its consumption is 0.4mA and its battery life is 270 days.