User manual

Technical data
16 Testboy
®
Profi III LCD+
Frequency measurement
During the voltage measurement, the frequency of the AC voltage applied is recorded and indicated on the display
by the small figures.
Replacing the battery
If the battery symbol appears on the display, immediately replace the batteries in order to ensure accuracy of the
measurement values.
To replace the batteries, open the battery compartment on the main housing. Use a screwdriver and release the
screws. When inserting the batteries, ensure that the polarity is correct.
Close and attach the battery compartment.
Batteries must not be disposed of with normal domestic waste. There will be a collection point
near you!
Technical data
Display LC display with backlighting
Rated voltage range 3…1000 V AC (TRMS) + -3digits
4…1400 V DC + -3digits
Frequency indication 0…1000 Hz
Phase sequence indication Yes
Input impedance
285 k
Switchable load 30 mA at 230 V AC
Duty cycle max. 30 s on \ 240 s off
Continuity test
0…50 
Resistance measurement
1…1999  ± 5 %
Protection class IP 65
Overvoltage category CAT IV 1000 V
Testing standard IEC/EN 61243-3
Voltage supply 2 × 1.5 V Type AAA Micro