DayTronic 3500 Series, Instruction Manual

Page: 27 / 122

2.9
S
ETUP
: C
ONNECTIONS AND
P
OWERUP
2
2.a T
RANSDUCER
C
ONNECTIONS
: M
ODEL
3578
Four-wire strain gage cabling (Fig. 11(a)) is to be used when the cable is under 20
feet in length.
The Model 3578 is equipped with an internal 59-K
Ω
, 0.1% calibration resistor for
the standard "shunt" calibration technique described in Section 4. If you wish to
use your own external shunt resistor, it should be tied between Pin 5 of the CON-
DITIONER CONNECTOR and the transducer's +SIGNAL line, as shown in Fig.
11(c). In this case, "CAL SENSE" (Pin 4) is not used.
With cabling under 20 feet in length, the +SENSE and –SENSE lines are tied to the
corresponding EXCITATION lines at the CONDITIONER CONNECTOR. Also, the
CALIBRATION SENSE line from Pin 4—or the optional external SHUNT RESISTOR
line from Pin 5—is tied to the +SIGNAL line at the CONDITIONER CONNECTOR.
Eight-wire strain gage cabling (Fig. 11(b)) is to used when the cable is 20 feet or
longer.* As before, you can install your own shunt calibration resistor between
Pin 5 and the +SIGNAL line, in which case Pin 4 is not used.
With cabling of 20 feet or over, the +SENSE and –SENSE lines are tied to the cor-
responding EXCITATION lines at the transducer. Also, the CALIBRATION SENSE
A
B
C
D
E
F
H
J
K
L
1
2
3
4
5
6
7
8
9
10
CONDITIONER CONNECTOR
–SENSE
+SENSE
SHIELD
External
SHUNT
CALIBRATION
RESISTOR
(User-
Supplied)
+SIGNAL
Fig. 11(c) Model 3578
Transducer Cabling:
Installation of User’s
External Shunt
Calibration Resistor
A
B
C
D
E
F
H
J
K
L
1
2
3
4
5
6
7
8
9
10
CONDITIONER CONNECTOR
+EXCITATION
+SENSE
SHIELD
Connector pins shown as viewed
from rear (cable) side of
connector.
Ground Lug
+SIGNAL
–EXCITATION
–SIGNAL
–SENSE
A
D
C
B
CAL
(E)
Unconnected wire
(Paired with "LEBOW CAL")
LEBOW CAL
Fig. 11(d) Model 3578
Transducer Cabling: 8-Wire
Cabling to LEBOW 1600 SERIES
TRANSDUCER (ONLY)
* NOTE: This cabling is to be used when connecting the Model 3578 to a Lebow 1800 Series
Transducer , regardless of cable length.