IDL 101
FUNCTIONAL DESCRIPTION
HB_IDL101_E_V222.doc
37
Gantner Instruments Test & Measurement GmbH
Measurement of Voltage:
Measuring Voltage U
=
=
In +
AGND
Circuit
U = U1
U
U1
+
-
A I N 2A I N 1
S
O
U
R
C
E
I
n
+
I
n
-
A
G
N
D
S
O
U
R
C
E
I
n
+
I
n
-
A
G
N
D
S
O
U
R
C
E
Connection Scheme
Figure 6.1 Measurement of voltage - single-ended
Measuring Voltages U1 and U2
Circuit
U = U1 - U2
Connection Scheme
=
=
In +
In -
U1-U2
U2
+
-
AGND
=
=
U1
+
-
U2
U1
A I N 2A I N 1
S
O
U
R
C
E
I
n
+
I
n
-
A
G
N
D
S
O
U
R
C
E
I
n
+
I
n
-
A
G
N
D
S
O
U
R
C
E
Figure 6.2 Measurement of voltage - differential
Two types of measurement are available for measurement of voltage with the
Datalogger IDL 101
:
single-ended
and
differential
measurement.
With the single-ended type of measurement the voltage to be measured is injected between an analog input (AIn +)
and analog ground (A
GND
). Differential measurements are realized by using one analog input (AIn + and AIn -). The
measuring range is between 0 and ±10 V.
Notice
: With differential measurements both voltages have to be within 10 V referred to A
GND
(Common-Mode-Range).
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