User Manual

GMC-I Gossen-Metrawatt GmbH 19
Control Functions
4.1.3 Quick Measurements
Measurements performed using a suitable fixed measuring range
are executed more quickly than those which utilize automatic
range selection. Quick measurement is made possible with the
following two functions:
• Manual measuring range selection, i.e. selection of the measuring
range with the best resolution (see chapter 4.1.2).
or
•With the DATA function (see chapter 4.4). In this way, the
appropriate measuring range is selected automatically after the
first measurement and the second measurement is executed
more quickly.
The selected measuring range remains active for the subsequent
series of measurements with these two functions.
4.2 Zero Offset / Relative Measurements
Depending upon deviation from the zero point, zero balancing or
a reference value for relative measurements can be stored to
memory:
The applicable reference or correction value is deducted
individually for the respective measuring function as an offset from
all subsequent measurements, and remains in memory until
deleted, or until the multimeter is switched off.
Zero balancing and reference value adjustment can be used for
auto-ranging, as well as for manual measuring range selection.
Zero Balancing
➭ Plug the measurement cables into the instrument and connect
the free ends to each other, except for capacitance
measurement in which case the ends of the cables are not
connected to each other.
➭ Briefly press the ZERO | ESC key.
The instrument acknowledges zero balancing with an acoustic
signal, and the “ZERO ΔREL” symbol appears at the LCD. The
value measured at the moment the key is pressed serves as a
reference value.
➭ Zero balancing can be cleared by once again pressing the
ZERO | ESC key.
Note

As a result of TRMS measurement, the multimeter displays a
residual value of 1 to 30 digits with short-circuited measure-
ment cables as the zero point for V AC / I AC or V(AC+DC) /
I (AC+DC) measurements (non-linearity of the TRMS con-
verter). This has no influence on specified accuracy above
1% of the measuring range (or 3% in the 1000 V and 10 A
ranges).
Setting the Reference Value
➭ Plug the measuring cables into the instrument and measure a
reference value (max. 25,000 digits, or 5000 digits in 10 A
range).
Deviation from zero
– With short-circuited measurement cables for V, Ω, A
– With open input for capacitance unit of measure F
Display
0 to 200 digits ZERO ΔREL
> 200 to 25000 digits ΔREL