Gossen MetraWatt METRAHIT ENERGY TRMS System Multimeter Operating Instructions Manual page 34

Measurements: V/Hz/dB – PQ/
Parameters Configuration
Prior to mains analysis, the function's parameters have to be confi-
gured under SET > MAinS. The following parameters are available:
• MAinS.F: Selection of the measuring signal line frequency is re-
quired for the calculation of the TRMS half-cycle value:
50 or 60 Hz can be selected. Selection is irrelevant for DC sig-
nals.
• rAnGE: The 6 V, 60 V or 600 V range (default) can be selected as
the voltage measuring range.
• TRIG: The threshold values for undervoltage (LoVoLt LiMit) and
overvoltage (HiVoLt LiMit) while monitoring the TRMS voltage
value can be entered here in digits. The full measuring range
corresponds to 60,000 digits.
• diP LiMit: If the TRMS half-cycle value falls short of the specified
value (in digits, 60,000 = full measuring range), a voltage drop
(dip) is detected.
• SWELL LiMit: If the TRMS half-cycle value exceeds the specified
limit, a brief overvoltage (swell) is detected.
• PEAK LiMit: If the momentary voltage value exceeds the value
specified here (regardless of polarity), an exceeded limit value is
recorded (PEAK).
• trAnS LiMit: A level can be set here as of which a voltage tran-
sient is recorded. This is a polarity-independent entry relative to
the momentary value. The smallest value is 200 V. Regardless of
the selected measuring range, acquisition always takes place
within a range of 200 to 1000 V.
34
– MHz/% – /nS/R
– /
SL
– Temp – /m – W/Wh – A/Hz/thd
Type of Measuring
Disturbance Range
Over/under-
6 ... 600 V
voltage
Dip/swell
6 ... 600 V
Peak
6 ... 600 V
Transients * 200 ... 1000 V
* Absolute value of the transients is limited to 1000 V by input protection.
Sequence
Ð Set the trigger values for the MAinS menu:
Line frequency:
Meas. range formains disturbance recording:
Lower trigger threshold:
Upper trigger threshold:
Voltage dip limit value:
Voltage swell limit value:
Trigger for surges or voltage peaks:
Limit value for transients:
See section 6.4.5, "MAinS Submenu", regarding settings.
Ð Set the rotary switch to PQ.
Ð Connect meas. cables same as for a voltage measurement.
Mains monitoring is started automatically as soon as the selector
switch is set to PQ.
The number of recorded mains disturbances appears at the left-
hand auxiliary display. Recorded events can be deleted by pres-
sing and holding the ZERO key.
Resolu- Intrinsic Uncertainty
tion under Reference
Conditions with Fixed
Frequency of 50/60 Hz
60,000
digits
6000 di-
1% rdg. + 1% MR
gits
6000 di-
1% rdg. + 2% MR
gits
 50 V
10 V
MAinS.F
rAnGE
LoVolt LiMit
HiVolt LiMit
diP LiMit
SWELL LiMit
PEAK LiMit
trAnS LiMit
GMC-I Messtechnik GmbH
Pulse Time

1 half-cycle

1 ms
0.5 ... 5 s