ASI DataMyte 600 - Page 111

Rev 3 Page 111
Wrench Selection
Wrench Selection
Torque Transducers are rated for maximum mechanical durability and accuracy. For example a
hand held torque wrench rated for 135 Nm would normally be used to measure values no greater
than 135 Nm. The rule of thumb is to use the central 75% of the full scale for maximum accuracy.
A torque transducer is less accurate at the extremes of the scale.
Over Scale Usage
The example above deals with normal usage, note that most transducers can read values as high
as 50% over scale. For example, a wrench rated for 135 Nm can probably read as high as 202 Nm.
Accuracy may suffer in over scale readings. If testing shows acceptable accuracy in over scale
readings then the number of wrenches needed to cover a route may be reduced.
Note: The "Full Scale" entry in the 501 data collector is unchanged in an over scale application. In
the example above the full scale entry would be 135. Note: any value beyond 150% may
permanently degrade the wrench.
Gage
Type
Name
(Char max = 12)
Full Scale
Recommended
min
Recommended
max
Over Scale
Max *
G2
Restart Torque
5Nm A-RST or Violet A-Rst
5 Nm
.5 Nm
4.5 Nm
7.5 Nm
G2A
Restart Torque
10 Nm A-RST or Silver A-Rst
10 Nm
1 Nm
9 Nm
15 Nm
G2B
Restart Torque
25 Nm A-RST or Red A-Rst
25 Nm
2.5 Nm
22.5 Nm
37.5 Nm
G2C
Restart Torque
75 Nm A-RST or Blue A-Rst
75 Nm
7.5 Nm
67.5 Nm
112.5 Nm
G2D
Restart Torque
150 Nm A-RST or Gold A-Rst
150 Nm
15 Nm
135 Nm
225 Nm
G2E
Restart Torque
300 Nm A-RST or Black A-Rst
300 Nm
30 Nm
270 Nm
450 Nm
G2F
Restart Torque
750 Nm A-Rst or Green A-Rst
750 Nm
75 Nm
675 Nm
1125 Nm
* No permanent degradation of performance