Ac Current Measurements; Overload Protection - Westfalia EM306B Bedienungsanleitung

AC Current Measurements

The measuring clamp can measure the
current by measuring the magnetic field
around a live conductor. This does not work if
phase (usually black) and neutral (usually
blue) are measured together. Place the
clamp only around one wire.
1. First, remove the measuring cables!
2. Open the clamp with the clamp opening
button (7) and place it around the wire
you intend to measure. To close the clamp, release the
button. Place the conductor as close to the middle of the
clamp as possible and try to hold it steadily during measur-
ing.
3. The current value is displayed. If the selected measuring
range is too small, a "1" is displayed as overflow indicator. In
such a case switch to the next higher measuring range
(2>20>400 A).
Please make sure not to exceed 400 Ampere!
Accuracy (at 50 – 60 Hz)
Range Resolution Accuracy
20 A 10 mA
200 A 100 mA
400 A 1 A
Operation
± 3 % of measured
value
+ 5 digits
± 2.5 % of measured
value + 5 digits
± 2.5 % of measured
value + 5 digits
23
Overload
protection
500 A
(30 sec.)