LTV38 R..TS/..TAS Safety Information
© Atlas Copco Industrial Technique AB - 9836 1857 00
5
Calibration value
Model
Nominal cali-
bration value:
at 0.59 mV/V
Angle en-
coder : resolu-
tion in pulses /
rev
LTV38 R85–
13–TS/TAS
100 318
LTV38 R70–
13–TS/TAS
84 266
LTV38 R60–
13–TS/TAS
50 214
LTV38 R50–
13–TS/TAS
50 183
LTV38 R50–
10–TS/TAS
50 183
LTV38 R42–
13–TS/TAS
50 152
LTV38 R42–
10–TS/TAS
50 152
LTV38 R32–
10–TS/TAS
50 117
LTV38 R27–
10–TS/TAS
50 98
1 Torque transducer
Sensitivity 0,59 mV/V. The individual calibration
value is engraved on the machine. On machines
with integrated memory (‘S’ in the machine desig-
nation) the calibration value is stored in the mem-
ory.
2 Angle encoder
The angle resolution value is engraved on the ma-
chine (only A models). The value is also stored in
the machine memory.
Machine memory
The following information will be stored in the
machine memory :
• pneumatic or electric machine or inline trans-
ducer
• torque transducer: calibration value (Informa-
tion possible to change from FOCUS)
• torque transducer: full scale value (Information
possible to change from FOCUS)
• torque transducer sensitivity: 0.59mV/V,
0.8mV/V or 2.0mV/V (Information possible to
change from FOCUS)
• serial number
• angle encoder: yes or no
• angle encoder: number of pulses per revolution
• cycle on start/stop: yes or no
• built-in solenoid: yes or no
• monitoring or controlled machine
• pulse machine: yes or no (for future use)
• number of tightening totally:
• number of tightening OK tightening:
• calibration date (YYMMDD) (Information pos-
sible to change from FOCUS)
For further information see P.I. Focus 2101/2102.
Signal lights
After the tightening cycle is completed, the signal
lights on the machine reveal the status of the data
for torque and, if used, angle.
The yellow light indicates that peak torque and/or
final angle data are below the programmed low
limit.
The red light indicates that peak torque and/or final
angle data are above the high limit.
The green light indicates in-limit torque and angle
readings.
Calibration of machines
All transducerized machines are individually cali-
brated at the factory before delivery. The reason is
that transducers, angle heads and gear trains are in-
dividuals and will affect the calibration value. The
resulting calibration value is engraved on the ma-
chine.
Checking of machine performance with an in-line
transducer is recommended to be done on a regular
basis. If the result from this check is out of limits
the machine should be recalibrated.
A new calibration is recommended to be made at
regular intervals (once / twice a year, after 50 000
– 100 000 tightening) and should always be done
after service, exchange of parts which may influ-
ence the calibration value (i.e. from transducer and
forwards).
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