Manual

Gossen Metrawatt GmbH 17
7.2 Selecting Measuring Functions and Measuring Ranges
7.2.1 Automatic Range Selection
The multimeter is equipped with auto-ranging for all measuring
functions except for temperature measurement, as well as diode
and continuity testing. Auto-ranging is active as soon as the in-
strument is switched on. The instrument automatically selects the
measuring range which allows for highest possible resolution of
the applied quantity. When the instrument is switched to fre-
quency measurement, the previously selected voltage measuring
range remains active.
AUTO-Range Function
The multimeter is switched automatically to the next higher range
at (3099 d + 1 d  0310 d), and to the next lower range at
(280 d – 1 d  2799 d).
In the case of high resolution (available depending upon measur-
ing function), the multimeter is switched automatically to the next
higher range at (30,999 d + 1 d  03100 d), and to the next
lower range at (2800 d – 1 d  27,999 d).
7.2.2 Manual Range Selection
Auto-ranging can be deactivated and measuring ranges can be
selected manually in accordance with the following table by
pressing the Man / Auto button.
The desired measuring range can then be selected with the
 or
 scroll key.
The instrument is automatically returned to automatic range se-
lection when the Man / Auto key is pressed, the rotary switch is ac-
tivated or the instrument is switched off and back on again.
Overview: Auto-Ranging and Manual Range Selection
* Only via manual range selection for V AC
The multimeter is held in the selected measuring range. If the
range limit is exceeded, “OL” appears at the display. You should
then switch to the next higher measuring range with the help of
the
 scroll key.
7.2.3 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. by selecting the measuring
range with the best resolution (see section 7.2.2)
or
•With the DATA function (see section 7.5) 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.
7.3 Zero Offset / Relative Measurements
Zero offset or a reference value for relative measurements can be
stored to memory depending upon deviation from the zero point:
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 with
auto-ranging, as well as for manual measuring range selection.
Note:
Zero offset is available for the following measuring functions and
switch positions: RISO, Coil, DAR, PI, Hz, Duty AC, RPM AC, ,
Temp RTD (the RLeads function is offered here as an alternative),
Temp TC, Continuity, Diode, R
LO
/2L (ZERO is also activated after
pressing the START key!) and R
LO
/4W (the thermal compensation
function is offered here as an alternative).
Zero Balancing
➭ Plug the measuring cables into the instrument and connect
the free ends to each other, except for capacitance measure-
ment and current measurement in which case the ends of the
cables are not connected to each other.
➭ Briefly press the Zero softkey.
The value measured at the moment the key is pressed serves
as a reference value. The instrument acknowledges zero bal-
ancing with an acoustic signal, and “Zero” and the reference
value appear at the display. The Zero softkey is displayed with
a green background.
➭ Zero balancing can be cleared by once again pressing the
Zero softkey.
Note
As a result of TRMS measurement, the multimeter dis-
plays a residual value of 1 to 10/35 digits with short-cir-
cuited measurement cables as the zero point for V AC /
I AC or V (AC+DC) / I (AC+DC) measurements (non-lin-
earity of the TRMS converter). This has no influence on
specified accuracy above 1% of the measuring range (or
3% in the mV, V (AC+DC) ranges).
Setting the Reference Value
➭ Connect the measuring cables to the instrument and measure
a reference value (max. 50% of the measuring range).
➭ Briefly press the Zero softkey.
The instrument acknowledges storage of the reference value
with an acoustic signal and the “ZERO” symbol appears at the
display. The value measured at the moment the key is
pressed serves as a reference value.
➭ The reference value can be cleared by once again pressing
the Zero softkey.
Notes Regarding Relative Measurement
• Relative measurement effects the digital display only.
The analog display continues to read out the original mea-
sured value.
• In the case of relative measurement,  F or AC quantities may
also appear as negative values.
Function Display
Man /
Auto
Manual mode active:
utilized measuring range is fixed
Man
 or 
Range switching sequence for:
V: 300 mV*
 3 V  30 V  300 V  1000 V
Hz: 300 Hz
 3 kHz  30 kHz  300 kHz (Hz(U))
:
300   3 k   30 k   300 k   3 M   30 M 
A:
300  A  3 mA  30 mA  300 mA  1 A
A:0.3 A  3 A  30 A  300 A
F:
30 nF  300 nF  3  F  30  F  300  F
RISO: 300 k   3 M   30 M   300 M   3000 M 
Man
Man /
Auto
Return to automatic measuring range selection Auto
Deviation from zero point
– with short-circuited measurement cables for V, , A
– with open input for capacitance unit of measure F
Display
0 ... 200 digits
ZERO