5.0: Setting up the Transducer and LDX-4
The LDX-4 may be set-up with output signals anywhere within a ±10 VDC or ±20
mA range. Typical outputs are
±10 VDC, ±5 VDC, 0-10 VDC and 4-20 mA. These procedures apply to voltage
and current output.
Voltage and current output are available at the same time, although they can-
not be individually adjusted. Either voltage or current should be chosen as the
calibration reference.
All outputs use 0 V signal as the signal reference.
A list of standard link settings is available, see section 5.2.
CAUTION:
During installation and adjustment, the top of the enclosure has to be
removed for access to user adjustments.
At this time, standard ESD handling precautions for electronic equipment should
be followed.
5.1: Option Links - Explained
The table below and subsequent diagrams explain the link functions and show
the factory setting.
Link
Description
Options
Standard Setting
Course Gain
Sets the basic gain
1 link on Positron 1 to 6
Link ON Position 1
Fine Gain
Adjustment between
course gain ranges
Potentiometer Adjustment
Mid Position
Course Offset
Shifts the output by a
fixed amount
Link ON -VE or +VE and
Link ON 5V or 10V
No offset - Link Parked
No offset - Links
Parked
Fine Offset
Fine trim around any
fixed offset
Potentiometer Adjustment
Mid Position
(7) Null
Used during set-up to
null output
ON, OFF
OFF
Freq.
Selects transducer
primary frequency
Lo - ON, Hi - Parked
Hi Freq. - Link Parked
Input Resistance Sets transducer
secondary load
100 K
W
Parked, 10 K
W
-
ON, 2 K
W
- ON
100 K
W
- Link Parked
Polarity (FR)
Enables output signal
direction change
2 Links across Forward or
Reverse
F Position - 2 Link ON
Input Gain
Input Gain of x1, x2,
x4 or divide 2
X1 - Parked, X2 - ON, X4 -
ON, DIV2 - ON
Link parked on X2
Link O N
Link PARKED
Link O FF
0V
+
VE
V
O
U
T
0
V
I
O
U
T
C
O
AR
SE
G
AIN
FINE GAIN
COARSE
OFFSET
-VE
+VE
5V
10V
FI
N
E
O
FF
SE
T
10
K
2K
- -
¦
R
¦
|F
|
- -
D
IV
2
X2
X4
G BK W R B
O
U
TP
U
T
PO
W
ER
1
2
3
4
5
6
(
7)
FR
EQ
LO
(O
N
)
H
I
(O
FF
)
NULL
