Measurement Functions; Ac / Dc Voltage - Chauvin Arnoux C.A 6549 Notice De Fonctionnement

3. MEASUREMENT FUNCTIONS

3.1. AC / DC VOLTAGE

Turning the switch to an insulation position (position other than OFF or SET-UP) sets the instrument to
automatic AC / DC voltage measurement. The voltage between the input terminals is measured at all
times and indicated as RMS value on the display unit: Input Voltage. Switching between AC and DC
mode is automatic.
When switch is turned, the frequency and the residual DC current between the terminals of the instrument
are also measured. (The residual current is measured in order to evaluate its impact on the insulation
measurement to come).
Input voltage
Frequency
Input current
Date: 24.06.2008
The insulation measurements cannot be started if there is an excessively high external voltage on the
terminals, in which case the
FIXED VOLTAGE
2500 V
Time: 15:31
symbol is displayed next to the measured external voltage (see § 3.2).
68
230 V AC
50.0 Hz
24.6 nA