Cleveland Motion Controls Classic UPB Transducer Load Cell REV BA User Manual

Page 7

INSTRUCTION NUMBER: AO-70136 BA

7of 9

not weigh more than ½ the maximum working

force of the transducers in most cases.

The surface under the UPB is not flat enough.

The bolting torque is not in accordance with

Figure 5 (especially for UPB with MWF under

250 lb.).

6.2 LOW

OUTPUT

SIGNAL

The transducer may have too large a maximum

working force for the application. Replace with a

lower maximum working force transducer or

increase web wrap angle.

6.3

WRONG POLARITY OF OUTPUT

SIGNAL

Transducers may have been incorrectly oriented.

See Section 2.4 for proper load direction.

Alternately, change the transducer excitation

voltage by interchanging the B and C connections.

6.4 OUTPUT SIGNAL NOT LINEAR,

ZERO SHIFTS DURING

OPERATION

Check transducer and tension roll mounting. All

mounting bolts must be tight. Check that there is

no dirt or foreign matter interfering with the

transducer mounting. Check that mounting surface

is flat and rigid.

6.5

NO OUTPUT SIGNAL

Check to see that all connections have been made

completely. Check for places where the

connecting cables might be crimped or cut.

6.6

VERY HIGH OUTPUT WITH NO

LOAD

Check cables and connectors for good connections

and check continuity of cables with an ohmmeter.

Check for proper wiring to transducers. Check

transducer gage resistance as given in the

following chart at room temperature with no load

applied.

TRANSDUCER GAGE RESISTANCE CHECK

Resistance

(ohms)

UPB 1

UPB 2/3

Pin C to B

420±20

Pin A to B

210±10

900-1100

Pin A to C

210±10

900-1100

7.0 SERVICE ASSISTANCE AND

REPAIR

For additional service assistance, please obtain the

Type, MWF, and Serial Number from the

nameplate. Contact the Factory Service

Department.

Phone: 216-524-8800

Or 800-321-8072

Fax:

216-642-2100

Visit Us: www.cmccontrols.com

Disassembly by improperly trained personnel may

result in additional damage to these units. Should

repairs be required or for warranty repairs, contact

the Customer Service Department for a return

authorization number before returning the units.