User Manual

* Use caution when working above 25 V AC or 35 V DC.
Even such voltage poses a shock hazard.
* Before you change the measuring range (another wiring of
Ra and Rb) remove the probe tips from the circuit.
* Measuring instruments don’t belong to children hands
3. Technical Data
max. input voltage
(basic instrument,
Ra = open;
Rb = shorted) 199,9 mV DC
max. display 1999 (3 ½-digit) with automatic
polarity indication
Display LCD i. e. LED elements
Measuring principle dual slope A/D converter
Cipher height LDP-135/140: 13 mm
LDP-335/340: 8 mm
LDP-235/240: 14 mm
Overflow indication “1” is displayed
Sampling rate 2...3 times per second
Input impedance > 100 MΩ
Accuracy ± 0,5 % (at 23° C ± 5° C and a
relative humidity of < 80 %)
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