Quick Measurements (Man Or Data Function); Zero Offset / Relative Measurements - Zero/Delta Rel Function - Gossen MetraWatt METRAHIT ENERGY TRMS System Multimeter Operating Instructions Manual

Control Functions

4.1.4 Quick Measurements (MAN or DATA function)

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 section 4.1.2)
or
• With the DATA function (see section 4.4) In this way, the appro-
priate 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.
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4.2 Zero Offset / Relative Measurements – ZERO/Delta REL Function
Zero offset or a reference value for relative measurements can be
stored to memory depending upon deviation from the zero point:
Deviation from Zero Point
– with short-circuited measurement cables
for V, , R
, , A
PE
– with open input for capacitance unit of measure (F)
(0 ... 200) digits
(200 ... 25000) digits
(10 A measuring range: up to 5000 digits)
The relevant reference or correction value is deducted individually
for the respective measuring function as an offset from all future
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
Ð 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.
Ð Briefly press the ZERO | ESC key.
The instrument acknowledges zero balancing with an acoustic
signal, and the "ZERO REL" symbol appears at the LCD. The
value measured at the moment the key is pressed serves as a
reference value.
Ð Zero balancing can be cleared by once again pressing the
ZERO | ESC key.
Display
ZERO REL
REL
GMC-I Messtechnik GmbH