DayTronic 3500 Series, Instruction Manual

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The Model 3510 is normally preset at the factory for positive off-scale "open TC"
indication. However, you may easily reset it for negative indication. Open the
connector housing and locate the "Open TC Detection Programming Jumpers"
(see Fig. 6). You will have to remove the solder drop connecting the middle termi-
nal pad to the "HI" (positive) pad, and to place a solder drop between the middle
pad and the "LOW" (negative) pad. Use a fine-point solder gun to heat the solder
drop to be removed, until it has melted sufficiently for you to wipe it off with a
clean rag. Make sure you remove all traces of solder from the jumper pads you
wish to disconnect.
2.a.3 C
ONNECTING AN
LVDT
OR
V
ARIABLE
R
ELUCTANCE
T
RANSDUCER TO THE
M
ODEL
3530
With regard to transducer cabling for the Model 3530 LVDT Conditioner , please
note the following:
a. 5-wire LVDT cabling (Fig. 7(a)) or 3-wire variable reluctance transducer
cabling (Fig. 7(c)) is to be used when the cable is under 20 feet in length. In
this case, the +SENSE and –SENSE lines are tied to the corresponding EXCI-
TATION lines at the CONDITIONER CONNECTOR.
7-wire LVDT cabling (Fig. 7(b)) or 5-wire variable reluctance transducer
cabling (Fig. 7(d)) is to be used when the cable is 20 feet or longer. In this
case, the +SENSE and –SENSE lines are tied to the corresponding EXCITA-
TION lines at the transducer.
b. When wiring an LVDT transducer to the 3530, you should connect both series-
opposed secondary coils to the terminal labelled "CENTER WIRE," as shown
in Figs. 7(a) and 7(b).
c. NOTE THAT THERE ARE SSIGNAL AND –SIGNAL CONNECTIONS
FOR USE WITH LONG-STROKE LVDT'S (FULL-SCALE INPUT OF 0-1, 0-2, OR
0-4 VOLTS/VOLT).
Thus, to allow for the larger input voltages produced by such a sensor, you
would connect its +SIGNAL line to the terminal labelled "HI +SIG," instead of to
the "+SIG" terminal. Similarly, you would connect the –SIGNAL line to the ter-
minal labelled "HI –SIG" instead of to the "–SIG" terminal.
2.2
2
S
ETUP
: C
ONNECTIONS AND
P
OWERUP
2.a T
RANSDUCER
C
ONNECTIONS
: M
ODEL
3530
+ –
To
Thermocouple
Conditioner
Analog Input
Board
– SIGNAL
+ SIGNAL
SHIELD
Ground
Lug
LOW HI
Strain
Relief
Post
Open TC Detection
Programming Jumpers
This terminal
NOT USED
This terminal
NOT USED
+ +
+ +
Fig. 6 Model 3510
Transducer Cabling