Before using the DMM, please take a few moments and review this section to understand where the voltage,
current, or resistance and other inputs and outputs should be applied.
This section contains important information
concerning voltage and current limits. Do not exceed these limits, as personal injury or damage to the
instrument, your chassis or application may result.
F
input con
V
+
This is the positive termin
ode and inductance measurements, and for
sourcing of VDC, VAC and IDC.
ents. The maximum input across
V,
Ω
+
and
V,
Ω
-
is 300 VDC or 250 V
ode
. When in the sourcing mode, the maximum
ed before damage occ
V,
Ω
-
This is the negative terminal for all Volts, 2W
Ω
, capacitance diode and inductance measurements, and or
sourcing of VDC, VAC and IDC. It is also the Source LO for 4W
Ω
.
Do not float this terminal or any other
DMM terminal more than 300 VDC or 250 VAC above Earth Ground.
(Also, see
Trig, 6W Guard
below.)
I +
This is the positive terminal for all Current measurements. It is also the Sense HI for 4W
Ω
measurements
and
6W
Ω
guarded measurements.
The maximum input across
I, 4W
Ω
+
and
I, 4W
Ω
-
is
2.5 A
. Do not apply more than
5 V peak across these two terminals!
I –
This is the negative terminal for all Current measurements. In the Current modes, it is protected with a
2.5 A,
250 V Fast Blow fuse
(5 x 20 mm). It is also the Sense LO for 4W
Ω
measurements and 6W
Ω
guarded
measurements.
V,
Ω
-
and
I, 4W
Ω
-
should never have more than 5 V peak across them.
TRIG GUARD
Both the Trigger and Guard functions use the DIN-7 connector. This group of pins include the
positive and negative hardware trigger input lines and the two SMX2044 Guarded Measurement Force and Sense
signals. The external trigger initiates reading(s) into the onboard buffer, and the 6W guard signals facilitate in-
igure 3-1. The DMM
nectors.
,
Ω
al for all Volts, 2W
Ω
, capacitance, di
W
Ω
measurem
It is also the Source HI for 4
m
AC when in the measuring
urs is 100 volts.
input allow
Signametrics
20
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