Cleveland Motion Controls Classic UPB Transducer Load Cell User Manual

CLEVELAND-KIDDER® UNDER PILLOW BLOCK

WASHDOWN-DUTY

LOAD CELL

INSTRUCTION MANUAL . . . TYPE UPB WASHDOWN-DUTY

7550 Hub Parkway
Cleveland, Oh 44125-5794

Phone: [phone]
Or 800-321-8072
Fax: [phone]

Visit Us: www.cmccontrols.com

INSTRUCTION NUMBER: AO-70136 BA 1 of 9

1.0 GENERAL INFORMATION

1.1 RECEIVING AND UNPACKING

Handle and unpack the equipment carefully.
Immediately upon arrival, check the shipment against
the packing list. Any damage should be reported
immediately to the carrier and to the nearest CMC
representative.

Equipment that will not be installed immediately
should be stored in a clean, dry location. Precautions
should be taken to prevent moisture, dust and dirt
from accumulating in storage and installation areas

1.2 PRECAUTIONS

1.2.1 Shipping
roll be removed when the machine is shipped with the
transducers mounted. The shock and vibration
transmitted to the transducers by the sensing roll
during transporting can damage them.

1.2.2 Roll Balance
balanced to prevent forces caused by imbalance.
These forces cause a noise signal to be superimposed
on the tension signal. The centrifugal force (F) caused
by imbalance can be calculated using the equation
below.

F = 28.6 x 10

W = Weight of roll in pounds

R = Displacement of mass of roll from the
axis of rotation in inches

RPM = Revolution per minute

It is recommended that the force (F) be less than 5%
of the resultant web force at the maximum web speed
for most applications.

1.2.3 Critical Roll Speed
vibration can be set up in a stationary shaft. If this
vibration (in cycles per minute) occurs at the
harmonic frequency of the shaft, the transducers can
be damaged. To determine the critical roll speed, use
the following formula:

- It is recommended that the sensing

- The sensing roll should be

-6

x W x R x (RPM)2 Lbs.

- Even with a balanced roll, a

Critical roll = 4.8 x 10
speed in RPM (Shaft Length)

6

x Shaft O.D.

2

Dimensions are in inches.

To assure that this problem is avoided, the critical roll
speed should at least be 20% above the roll speed
attained at maximum web speed.

1.2.4 Overloading

- Repetitive overloading above the
maximum working force or severe overloading should
be avoided because it will damage the transducers.

1.3 SPECIFICATIONS

Gage Resistance - End to end resistance 440-480

Ohms

Gage Factor - 100 nominal

Excitation Voltage -10 VDC or VAC (RMS)

maximum

Output Signal
at Rated MWF - 100 mV nominal per

Transducer (1/2 bridge)

200 mV nominal per

Transducer pair (full bridge)

Output Impedance - Approximately 880 Ohms for

UPB2 and UPB3

Approximately 120 for UPB 1

Required Input
Impedance of
Tension Amplifier - 5K ohms per Transducer (1/2

bridge)

Maximum Voltage,
Gage to Beam or
Base (Ground) - 50 VDC

Operating
Temperature Range - 0

F to +200 F

Compliant

INSTRUCTION NUMBER: AO-70136 BA 2 of 9

1.4 DESCRIPTION

The Cleveland-Kidder Washdown Duty UPB
transducers utilize a sensing twin beam to which
semiconductor strain gages are bonded. With these
high output signal gages a very small force on the
sensing beam will be shown as a change in the tension
signal.

The type UPB transducers are for use with shafts that
are mounted in Pillow Block Bearings. See Figure 1.
For mounting dimensions see Figure 2.

Pillow Block Bearing

Washdown UPB Transducer

Figure 1

BM N

A

F G

PILLOW BLOCK

MOUNTING PLATE

LOAD CELL

C

L

J

E

H

K

D

W

No.

Size

No.

*Allow 2.5 inches (64 mm) clearance for connector
**Approximate rating in Newtons

A B C D E F(Max.) G H J (Max.) K L M N W
1 1.5 0.55 5.8 1.5 5/16 (4) 5.8 1.6 1.95 ½ (2) 1.40 6.5 1.3 2.2 2.2 25, 50, 100, 250, 500, 1000
2 3 0.80 10.0 3.0 ½ (4) 10.0 3.0 2.5 ¾ (4) 1.71 11.0 3.3 3.95 4.0 1000, 2500, 5000, 10000, 20000
3 4.5 1.63 15.0 4.5 1 (4) 15.6 5.0 4.2 1-1/8 (4) 2.80 17.0 4.8 5.2 6.5 10000, 20000, 30000

A B C D E F(Max.) G H J (Max.) K L M N W
1 38 14 147.5 38 M8 147 40.5 49.5 M12 (2) 35.5 165 33 56 56 110, 225, 450, 1100, 2250, 4500
2 76 20 254 76 M12 254 76 63.5 M20 (4) 43.5 279.5 84 100 101.5 4500, 11000, 22000, 45000, 9000
3 114 41.5 381 114 M24 396 127 106.5 M30 (4) 71 432 122 132 165 45000, 9000, 13500

Dimensions in Inches* Size

Dimensions in Millimeters*

Figure 2

Maximum Working Force (lb.)

Maximum Working Force (N.)**

INSTRUCTION NUMBER: AO-70136 BA 3of 9