Westfalia 82 04 51 Bedienungsanleitung Seite 56

Notes:
When the test leads are connected to the unit in idle state (i.e.
without being connected to a device to be measured), a
fluctuating value may be displayed on the display due to the
high sensitivity of the device. When a measurement is per-
formed how-ever, the displayed value corresponds exactly to
the specified accuracy of the unit.
If "OL" is shown on the display at the manual range mode, the
selected measuring range has been exceeded by the meas-
urement value. Select a higher range.
In manual measuring range mode select the highest range
when the value to be measured is unknown.
Do not exceed the maximum input voltage of 600 V rms AC.
If the measured voltage is higher than 610 V rms AC, the
symbol "OL" appears on the display and the built-in buzzer
sounds.
AC Voltage Measurements - Accuracy
Range
660 mV
6.6 V
66 V
600 V
Input impedance:
Overload protection: 660 mV range: 250 V
Max. input voltage:
Frequency range:
Operation
Resolution
0.1 mV
0.001 V
0.01 V
0.1 V
10 MΩ
66–600 V range: 600 V
600 V rms AC
40 – 400 Hz
Accuracy
± (1.5% of reading + 10 digits)
± (1.2% of reading + 5 digits)
± (1.5% of reading + 10 digits)
51
or 250 V rms AC
or 600 V rms AC