Cleco 75NLTVCE Series, Operation & Service Manual

7

TRANSDUCER SPECIFICATIONS

MAXIMUM TORQUE CAPACITY

147 ft. lbs. (200 Nm)

OUTPUT VOLTAGE (Vo)

2 Millivolts per volt at maximum torque capacity

BRIDGE RESISTANCE (Rbr)

700 ohms (nominal) can be used with 350 and 700 ohm strain gage equipment*

TRANSDUCER CABLE

No. 203450

CALIBRATION INSTRUCTIONS

    ANGLE HEAD SIZE          FULL SCALE VALUE (FS)

               FT. LBS.              Nm

Straight

  147.5

             200

    "V"

  196.2

             266

    "X"

  312.7

             424

In order to calculate the calibration value for the system in % full scale, the following formula may be used:

% FS =              Rbr

      1

    1

     ------------------  X  -----  X  -----
     2(Rcal) + Rbr       Vo

    2

Where Rcal = Calibration Resistor Value in ohms of the torque monitor used.

The following is an example of a 75 series right angle tool, a "V" head and a torque monitor with a 110,000ohm calibra-
tion resistor.

The values are:    FS    = 196.2 ft. lbs.

Rbr   = 700ohm
Vo    = .002
Rcal  = 110,000ohm

                  700ohm

     1

    1

% FS =      ---------------------------  X   ------  X   -----     = 79.3%
             2(110,000ohm) + 700ohm    .002

    2

Calibration Value = 196.2 (.793) = 155.6 ft. lbs.

*Calculated calibration value should be doubled if a torque monitor designed for use with a 350ohm bridge resistance
transducer is used.

A

A

B

B

C

C

D

D

BLACK

GREEN

RED

WHITE

TOOL RECEPTACLE

CABLE CONNECTORS

R

WIRING DIAGRAM

E

E

F

F

(+) SIGNAL

(-) SIGNAL

SHIELD

(+) EXCITATION

(-) EXCITATION

Ro/2

Rm/2

R

R

R

t

C

t

C

Ro/2

Rm/2

Rcal

R= Gage Resistance
Rm= Modulus Resistor
Ro= Output Scaling Resistor
Rm & Ro may be omitted
Rcal= Shunt Calibration Resistor