Cooper Tools Cleco 88 Series, Operation & Service Manual

Page: 6 / 24

6
TRANSDUCER SPECIFICATIONS
MAXIMUM TORQUE CAPACITY 25.0 ft. lbs. (33.9 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 CONNECTOR Mates with Cannon KPT01/MS3111-6S or equivalent
CALIBRATION INSTRUCTIONS
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 8 series tool and a torque monitor with a 110 kohm calibration resistor.
The values are: FS = 25.0 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 = 25.0 (.793) = 19.8 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