User manual

48 GMC-I Messtechnik GmbH
Measurements: V/Hz/dB – PQ/ – MHz/% – /nS/R
SL
– / – Temp – /m – W/Wh – A/Hz/thd
Min-Max Function in Power Measurement
Instantaneous power is displayed with the switch in the W setting.
The Min-Max function is activated with the DATA/MIN/MAX key. The
minimum and maximum values for active, reactive an apparent
power are display as of the beginning of the power measurement,
along with time of occurrence (date and time). Previous Min-Max
values can be cleared without exiting the function by pressing the
ZERO key.
This function differs from the general Min-Max function insofar as
measurement is performed continuously in the background, even if
the Min-Max display is not shown, and while the instrument is in
the energy measuring mode.
Power Measurement with Current Clamp Transformers
In order to use current clamp transformers with current output for
power measurement, it is necessary to set the clamp factor in menu
(SEt CLiP) at a value of 1:1/10/100/1000, see section 6.4.3. Current
clamp transformers usually allow for AC measurements only.
When reading the measured
value, please take into account
the additional error resulting
from the current clamp trans-
former.
Power Measurement with Current Clamp Sensors
Alternatively, it is possible to perform the power measurement
with current clamp sensor CP1800 including voltage output along
with accessory SR9800*, see also section 5.8.3. In this case, the
clamp factor must be set at a value of 1:1E6 or 1:1E7, respec-
tively, see section 6.4.3. If you choose this option, you can also
measure DC current.
The maximum permissible
operating voltage is 300 V
CAT III to earth.
* applicable for multimeters of the
METRAHIT ENERGY
series as of
firmware version 2.xx
COM
V
Tem p

AmA
N
L
~
N
L
COM
V
Tem p

AmA
SR9800