Beha-Amprobe MT204-S Manual Del Usuario página 28

Explanation of linear and non-linear mode
Residual voltage measurement "Linear mode"
In linear mode it is assumed there are only
discharge process (capacitors, resistors, inductors etc.) and therefore
discharge characteristic is exponential, see the diagram below.
In linear mode displayed result refers to peak value of mains voltage, see
the figure 13.
Figure 13: Linear mode
In linear mode the MT 204-S detects automatically two standard system
voltages:
230 V .................... Uin = 230 V ± 10%
400 V .................... Uin = 400 V ± 10%
To include mains over-voltage, the measured residual voltage is calculated
with reference to peak value of max. possible mains over-voltage, i.e.:
Up = 230 V × 1.1 × 1.41 = 358 V .......... standard system voltage 230 V
Up = 400 V × 1.1 × 1.41 = 620 V .......... standard system voltage 400 V
If actual mains voltage differs from nominal system voltage more than ±
10%, the MT204-S scales the result to peak value of actual voltage.
Example 1: Uin = 173 Vef (the value differs more than 10% from 230V),
result refers to 173 V × 1.41 = 244 Vp
Example 2: Uin = 209 Vef, the value differs less than 10% from 230V,
result refers to 230 V × 1.1 × 1.41 = 358 Vp
"linear" components involved in
28