Nexen TA100 964400 - Manual (Page 10)

6
FORM NO. L-20292-C-0700
SPAN ADJUSTMENT
NOTE
Before making any Span adjustments, the output
voltage level needs to represent the tension levels
required. The maximum tension level needs to be
calculated (Example: Maximum tension = 100 Lbs.).
1. Thread a rope or narrow web over the Sensor Roll in the
normal path. Be sure the rope or web is at the center of
the Sensor Roll; then, hang a known weight (within the
tension range of the system) on one end of the rope or
web (Example: Maximum tension = 100 Lbs., hang a 50
Lb. weight) (See Figure 13).
2. Connect a voltmeter to TP7 (COM) and TP1 (See
Figure 14).
3. Rotate S1 clockwise to VDC, increasing the
reading at TP1 (Example: Maximum tension = 100 Lbs.
with a 50 Lb. weight, adjust the output for 5.0VDC) (See
Figure 14).
CALIBRATION FOR TYPE CFL STYLE LOAD SENSORS
NOTE
Prior to calibration, make sure jumpers J3 and J4 are set to the No. 4 position for Type CFL Sensors. Terminals 5 and
6 must be jumpered together.
ZERO ADJUSTMENT
FIGURE 12
FIGURE 13
FIGURE 14
TP7
TP7
TP2
TP1
S1
Jumpers
J3 and J4
NOTE
Before making any Span adjustments, the output
voltage level needs to represent the tension levels
required. The maximum tension level needs to be
calculated (Example: Maximum Tension = 100 Lbs.).
1. Set the Power Switch to ON.
2. Make sure the web has been removed and no other
objects are sitting or resting on the sensor roll.
3. Rotate both S1 and S2 counterclockwise to minimum
(See Figure 12).
4. Connect a voltmeter to TP7 (COM) and TP1 (See
Figure 12).
5. Rotate Z1 to 0.0VDC at TP1 (See Figure 12).
6. Connect a voltmeter to TP7 (COM) and TP1 (See
Figure 12).
7. Rotate Z2 to 0.0VDC at TP2 (See Figure 12).
TP1
TP2
S1
Z2
S2
Z1
NOTE
R31 and R32 are factory adjustments only. R31 is a
fine adjustment for the 0-10 VDC. R32 is a fine
adjustment for the 4-20mA.
R31
R32
S2