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GMC-I Messtechnik GmbH
Control Functions
4
Control Functions
4.1
Selecting Measuring Functions and Measuring Ranges
The rotary switch is linked to the automatic socket blocking
mechanism, which only allows access to two connector jacks for
each function. Be certain to remove the appropriate plug from its
respective jack before switching to and from the “A” functions.
The socket blocking mechanism prevents the user from inadver-
tently turning the selector switch to impermissible functions after
the measurement cables have been plugged into the instrument.
Presence of Dangerous Touch Voltages
If dangerous volt-
ages are applied in
the high-imped-
ance voltage mea-
suring functions
(switch position V
or PQ), switching
to low-impedance
measuring func-
tions (switch posi-
tion MHz,
, conti-
nuity, temperature
or capacitance)
causes “HiVoLt” to
appear at the dis-
play and the re-
spective measure-
ment is disabled. The measuring function is not switched until
dangerous touch voltage is no longer applied to the input. If the
instrument switches itself off in the event that hazardous touch
voltage is applied (during memory mode operation with large
sampling period), the high-voltage warning symbol remains visible
at the display.
4.1.1 Automatic Range Selection
The multimeter is equipped with auto-ranging for all measuring
functions, except for temperature measurement and diode and
continuity testing. Auto-ranging is active as soon as the instru-
ment is switched on. The instrument automatically selects the
measuring range which allows for highest possible resolution of
the applied quantity.
AUTO-Range Function
The instrument is switched automatically to the next higher range
at
(
310,000
d + 1 d)
031,000 digits, and to the next lower
range at
(
28,000
d – 1 d)
27,999 digits.
The instrument automatically switches to the next higher or next
lower measuring range for the following measured quantities:
230
.
00
V
050
.
00
AC
TRMS
Hz
U > 45 V:
V~
V
V
Temp
TC
Temp
RTD
hivolt
Measuring Range
Reso-
lution
Switching to Next
Higher Range
at
(... d + 1 d)
Switching to Next
Lower Range
at
(... d -1 d)
V
, A
,
, Hz
5¾
310,000
28,000
V
, V
, A
, A
4¾
31,000
2800
3 nF ... 3 mF
3¾
3100
280