Nexen WEB CONTROL TM140-D User manual

1FORM NO. L-20186-B-0702
Tension Meter
TM140-D
WEB CONTROL PRODUCTS
User Manual

FORM NO. L-20186-B-0702 2
In accordance with Nexen’s established policy of constant product improvement, the specifications contained in this
manualaresubjecttochangewithoutnotice. Technicaldatalistedinthismanualarebasedonthelatestinformation
available at the time of printing and are also subject to change without notice.
Technical Support: 800-843-7445
[phone]
www.nexengroup.com
Copyright 1999 Nexen Group, Inc.
NexenGroup,Inc.
560 Oak Grove Parkway
Vadnais Heights, Minnesota 55127
ISO 9001 Certified
Readthismanualcarefullybeforeinstallationandoperation.
Follow Nexen's instructions and integrate this unit into your system with care.
This unit should be installed, operated and maintained by qualified personnel ONLY.
Improper installation can damage your system or cause injury or death.
Comply with all applicable codes.
DANGER

3FORM NO. L-20186-B-0702
TABLE OF CONTENTS
Introduction---------------------------------------------------------------------------------------------------------------------------4
Installation-----------------------------------------------------------------------------------------------------------------------------5
ElectricalConnections------------------------------------------------------------------------------------------------------------6
AdjustmentofFullScale Value-------------------------------------------------------------------------------------------------7
Sensor Calibration -----------------------------------------------------------------------------------------------------------------7
Operation------------------------------------------------------------------------------------------------------------------------------8
Maintenance --------------------------------------------------------------------------------------------------------------------------9
FuseReplacement -----------------------------------------------------------------------------------------------------------------9
CheckTerminalValues------------------------------------------------------------------------------------------------------------9
Troubleshooting-------------------------------------------------------------------------------------------------------------------10
MountingDimensions -----------------------------------------------------------------------------------------------------------12
Specifications----------------------------------------------------------------------------------------------------------------------13
Warranty-----------------------------------------------------------------------------------------------------------------------------14

FORM NO. L-20186-B-0702 4
INTRODUCTION
Nexen’s “TM140D” Tension Meter measures, displays,
and provides proportional output signals, based upon
tension generated in a continuous strip process.
“TM140D” provides the excitation for two LDVT based
MB Series tension sensing load cells. The load cells
measure web tension and provide a low voltage output
signal proportional to that tension.
The “TM140D” amplifies the signals from the two load
cells separately (See Fig. 1) and feeds the Digital
Display and several output circuits with the resultant
amplified signals. The Read Out Selector Switch
determines which of the buffered signals will be
displayed on the Digital Display and at the Recorder
Terminals.
These buffered signals are also present at Terminals
26, 27, and 28 located on the back panel of the
“TM140D.” These three terminals are not affected by
position of the Read Out Selector Switch. The total
tension signal is also presented as a 4 to 20 mA signal
at Terminals 10 and 11 and as a 0 to 10 VDC signal at
Terminals 29 and 30. These two signals are not
buffered or filtered.
A Zero Tension Circuit is also provided. The Zero
Tension Circuit closes a Normally Open (N.O.) relay
when tension drops to a low level, as would occur
during a web break. This circuit is controlled with a
front panel switch and may be disabled when running at
extremely low tensions to prevent nuisance tripping.
Read this manual carefully, making full use of its
explanations and instructions. The “Know How” of safe,
continuous, trouble-free operation depends on the
degree of your understanding of the system and your
willingness to keep all components in proper operating
condition. Pay particular attention to all NOTES,
CAUTIONS, and WARNINGS to avoid the risk of
personal injury or property damage. It is important to
understand that these NOTES, CAUTIONS, and
WARNINGS are not exhaustive. Nexen can not
possibly know or evaluate all conceivable methods in
which service may be performed, or of the possible
hazardous consequences of each method. Accordingly,
anyone who uses a procedure which is not
recommended by Nexen must first satisfy themselves
that neither their safety or the safety of the product will
be jeopardized by the service method selected.
MB #2
No. 2 Amp.
Buffer
Buffer
BufferNo. 1 Amp.
MB #1
Terminal Block
Connections on
Back Panel
No. 1
Total
No. 2
0-10 VDC
4-20 mA
Amp
Amp
+
Read Out
Selector Switch Tension
Indicator
Recorder
Terminals
Figure 1

5FORM NO. L-20186-B-0702
INSTALLATION
NOTE: “TM140D” is an electronic component
and should be mounted in a dry, dust-free,
shock and vibration-free area which has an
ambient temperature of more than 32º F [0º
C] and less than 122º F [50º C].
A. SHELF OR WALL MOUNTING
1. Remove two screws located in TM140D front panel
(See Fig. 2).
2. Remove TM140D from mounting shell (See Fig. 2).
3. Install Mounting Brackets
a. For Shelf Mounting use the two mounting
brackets and four wing screws provided (See Fig. 3).
NOTE: Brackets may also be mounted to the
upper screw holes to allow under shelf
mounting.
b. For Wall Mounting, secure two mounting brackets
with the four wing screws provided (See Fig. 4)
4. After mounting brackets have been installed,
secure mounting shell to shelf or wall using
customerprovidedscrews.
5. Reinsert TM140D into mounting shell and secure
with two screws removed in Step 1 (See Fig. 2).
B. PANELMOUNTING
1. Insert “TM140D”into cutout in panel (See Fig. 5
for Panel Cutout Dimensions).
2. Insert Slides into grooves of TM140D mounting
shell.
3. Using four Wing Screws provided, secure Mounting
Brackets to Mounting Shell (See Fig. 6).
4. Insert Adjustment Screws and Jam Nuts into center
hole of Mounting Brackets (See Fig. 6).
5. Adjust screws until panel is firmly clamped between
“TM140”Front Panel Bezel and Slides (See Fig.
6).
6. Tighten Jam Nut.
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Panel Cut Out
189 mm
7.44 in
93 mm
3.66 in

FORM NO. L-20186-B-0702 6
ELECTRICAL CONNECTIONS
NOTE: Use cables provided with MB Tension
Sensor to connect MB Tension Sensors to
“TM140-D.” Use 18 AWG two connector cable
for all other connections (See Fig. 7).
A. SENSOR WIRING.
1. Dual Sensors.
a. Connect both Sensor Cables to “TM140-D.”
b. Connect both Shields to Terminal 9.
2. Single Sensor.
a. Connect Sensor Cable as shown for Sensor 1.
b. Short across Terminals 5 and 6 with a jumper
wire.
B. REVERSE TENSION SENSING
1. Connect YELLOW wires of MB Sensor Cables to
Terminals 1 and 5 of “TM140-D.”
2. Connect GREEN wires of MB Sensor Cables to
Terminals 2 and 6 of “TM140-D.”
C. REMOTETENSION INDICATOR
1. Remove jumper from Terminals 14 and 15.
2. Connect 1 mA remote meter leads to Terminals 14
and 15.
D. Apply AC power to Terminals 16 and 17. Connect
Earth Ground to Terminal 25. AC power can be
100-110, 120, 200, 220, or 240 VAC either 50 or
60Hz.
E. Voltage Select Jumper wire connected to Terminal
18 is connected to Terminal 24 (240 V) from the
factory. If another voltage is applied at Terminals
16 and 17, then remove jumper from Terminal 24
and connect to the proper terminal.
Tension
Sensor
No. 2
Tension
Sensor
No. 1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
External Terminals
Zero
Tension
Contact
100V
110V
120V
200V
220V
240V
+
+
+
+
No. 1 Tension
No. 2 Tension
Total Tension
Measuring
Outpput
0 to 10V COM
Control Output 0 tp 10V
Earth
Power Supply
Voltage Selecting
Wiring
+
+
AC Power
Supply
External Meter
Output (1 mA)
Zero Tension
Output
Control Output
4 - 20 mA
Green
Yellow
Red
Black
Green
Yellow
Red
Black
White
Figure 7

7FORM NO. L-20186-B-0702
ADJUSTMENT OF FULL SCALE VALUE
1. Slide Adjustment Window to the left to open (See
Fig. 8).
2. Set Power Switch to “ON”.
3. Set “SW1-1”to “OFF”and “SW1-2”to “ON”(See
Table 1).
4. Set SW1-3 and SW1-4 according to Table 1.
5. Rotate VR1 to MIN (Fully Counterclockwise) (See
Fig. 8).
6. Rotate VR3 to obtain “000”on the Display.
7. Rotate VR1 to MAX (Fully Clockwise) (See Fig. 8).
8. Rotate VR2 until Indicator reads maximum desired
tension readout value. This value can be anywhere
between “0”and “1999”.
9. Set SW1-1 to “ON”and SW1-2 to “OFF”.
10. CloseAdjustmentWindow.
11. Set Power Switch to “OFF”.
FULL SCALE VALUE
100 - 1999 lb
10.0 - 99.99 lb
5.00 - 9.99 lb
DIGITAL READ OUT
0000
000.0
00.00
SW1-3
OFF
ON
OFF
SW1-4
OFF
OFF
ON
SENSOR CALIBRATION
A. ZERO ADJUSTMENT
NOTE: Perform Zero Adjustment with no web
on sensing roll and no other objects sitting
or leaning on roll or sensors.
1. Set Power Switch to “ON”.
2. Set Zero Tension Switch to “OFF”.
3. Set Read Out Selector Switch to “No. 1”and
adjust No.1 Zero Variable Resistor until Digital
Display displays “ZERO”.
4. Set Read Out Selector Switch “No. 2”and adjust
No. 2 Zero Variable Resistor until Digital Display
displays “ZERO”.
NOTE: When using only one sensor, make
sure that a jumper wire is provided between
Terminals 5 and 6.
5. Set Read Out Selector Switch to “TOTAL”. The
Digital Display must still show “ZERO.”
6. Set Zero Tension Switch to “ON”.
7. Set Power Switch to “OFF”.
Figure 9
Figure 8

FORM NO. L-20186-B-0702 8
B. SPAN ADJUSTMENT
1. Thread a rope or narrow web over the sensor roll in
the normal web path, making sure that the rope is
in the center of the sensor roll. Hang a known
weight (weight must be less than the Maximum Full
Scale) on one end of the rope. Secure other end
of rope to machine with the known weight held off
the ground (See Fig. 10).
2. Set Power Switch to “ON”.
3. For Two Sensor Calibration:
a. Set Read out Selector Switch to “No. 1”, and
adjust No. 1 Span variable resistor until the Digital
Display shows one half the known weight on the rope.
b. Set Read Out Selector Switch to “No. 2”, and
adjust No. 2 Span variable resistor until the Digital
Display shows one half the known weight on the rope.
c. Set Read Out Selector Switch to “TOTAL”. The
Digital Display must read the known weight on the rope.
4. For Single Sensor Calibration:
a. Set Read Out Selector to “No. 1”and adjust
No. 1 Span variable resistor until the Digital Display
shows the total known weight on the rope.
b. Set Read Out Selector to “No. 2”and turn No. 2
Span variable resistor counterclockwise to “ZERO”.
c. Set Read Out Selector Switch to “TOTAL”. The
Digital Display must read the total known weight on
the rope.
5. Set Power Switch to “OFF”.
OPERATION
Figure 11
Start machine in operation with a web in place. Set “TM140-D” Power Switch to “ON”.
Figure 10
1. Tension Indicator will display tension at No. 1
Sensor, No. 2 Sensor, or Total Web Tension, as
commanded by Read Out Selector Switch.
2. Recorder Terminals will put out a buffered signal,
proportional to the Digital Display, with 0 to 10
volts being equal to zero to full scale in high-range.
Recorder Terminals are also controlled by the Read
Out Selector Switch.
3. The No. 1, No. 2, and Total signals at terminals 26,
27, 28, and 29 on the back panel (See Fig. 7, Page
3) are also proportional at 0 to 10 volts equal to
Maximum Full Scale, but are not controlled by the
Read Out Selector Switch. They constantly put
out the appropriate proportional and buffered
signal.
4. The External Meter Terminals 14 and 15 present a
0 to 1 milliampere buffered output which is also
proportional to Maximum Full Scale.
5. The 4 to 20 milliampere signal at Terminals 10 and
11, and the 0 to 10 volt signal at Terminals 29 and
30 are also proportional to 0 to Full Scale but they
are not buffered.
6. When tension falls to zero, the normally open Zero
Tension Relay contacts close. This relay signal can
be picked up at Terminals 12 and 13. The
contacts are rated at 250 VAC, 0.2A.

9FORM NO. L-20186-B-0702
MAINTENANCE
FUSE REPLACEMENT
“TM140-D”has two protective fuses. One fuse is in the incoming AC line; the other fuse protects the Zero Tension
circuit from the feedback voltage resulting from damage to the device connected to the Zero Tension Terminals.
Nexen’s “TM140-D”does not require maintenance. Periodically check that the pillow block bearings mounted to the
Tension Sensors have not moved. Nexen also recommends checking Zero and Span Adjustment (See Sensor
Calibration) if close accuracy is required.
AC Line Fuse
1. The AC Line Fuse is rated 0.2A Slow Blow. It is
located on the back panel by the Terminal block.
Lift the catch below the fuse holder to remove the
fuse holder.
2. Replace the fuse with the Slow Blow 0.2 amp
spare fuse provided.
3. Reinstall the fuse holder, making sure it clicks into
place when the catch holds.
Zero Tension Fuse
1. The Zero Tension Fuse is located on the Main
Printed Circuit Board. It is rated at 0.2A Instant
Blow. To replace the Zero Tension Fuse, remove
the two screws from the front panel of the “TM140-
D”and remove the “TM140-D”from the Mounting
Shell (See Sect. III, Para. A, Steps 1 and 2).
2. Remove the defective fuse from the fuse holder and
replace with the 0.2 amp Instant Blow fuse provided.
3. Install the “TM140-D”into the Mounting Shell and
re-secure the two screws.
CHECK TERMINAL VALUES
Refer to Figure 13.
Remove two screws from “TM140-D”front panel and
slide “TM140-D”out of the Mounting Shell (See Sect.
II, Para. A, Steps 1 and 2). This will expose the
CHECK TERMINAL and COMMON PIN. The
COMMON PIN is used for checking all voltages
except the power supply for the Tension Sensor. When
checking the Tension Sensor Power Supply circuit,
check Terminal 6 is used as COMMON.
Figure 12
Figure 13
CHECK
CP5
CP6
CP7
CP8
CP1
CP2
CP3
CP4
Power Supply
Signal Line
CHECK ITEMS
Power Supply for Sensor Reference Point
Power Supply for Operational Amplifier
Power Supply for Operational Amplifier
Tension at No. 1 Sensor
Tension at No. 2 Sensor
Total Tension
Tension Value on the Digital Display
NORMAL CONDITION
About +6 VDC
About +15 VDC
About +15VDC
Value corresponding to
tension with Zero to Full
Scale equals 0-10 V
Same as CP3

FORM NO. L-20186-B-0702 10
TROUBLESHOOTING
START
Are the DC power supply
voltages normal?
Is tension normally indicated
when a load is applied/released
to/from the sensor roll?
Are each of the external
output terminal
readings normal?
No Fault
Go to “A”power supply
circuit check.
•Check voltages using the check
terminal for the power supply.
NO
•Does the indication on the Digital
Display return to zero when the
load is removed?
•Does the indication reading
change as the Seadout Selector
switch is cycled?
Go to “B”tension
sensor check.
NO
The main board
is defective.
NO
YES
YES
YES
“A” power supply circuit check
Is the Voltage Selector Jumper
set to the AC power supply
voltage used?
Is the AC power supply voltage
within the tolerance (± 10%)?
Is the power fuse blown?
NO
NO
YES
YES
YES
NO
Set it to the power supply
voltage being used.
Adjust the voltage within the
tolerance.
Replace it with the specified
fuse (0.2A Slow Blow).
The power supply circuit
board is defective.