DATUM ELECTRONICS
M425 TORQUE TRANSDUCER HANDBOOK
18
ALTERNATIVE SOLUTIONS
THE DATUM RS & FF425 RANGES
PRE-CALIBRATED
AND TESTED
TEST CERTIFICATE
The M425 Series Torque Transducer is calibrated on
test rigs traceable to UK National Standards
The Transducers will be subjected to a series of test cycles
starting with a proof load cycle(s) and then followed by a
series of calibration cycles.
Loads are applied from zero torque to the maximum working
torque of the Transducer.
The data shown on the test certificate:
•
The test equipment used
•
Calibration date
•
A table of the actual loads applied against the output
•
The output is described in either:
mV/V -
this is the raw strain signal
from the torque shaft
Nm/Lbft - this is the calibrated output
of the transducer
Some Transducers are supplied with a raw output that
is processed and displayed in the instrumentation or
user software.
Other Transducers store their calibration settings and have
an output in the units required, Nm/Lbft. These Transducers
can also output the raw mv/V values where required.
•
Example of cal sheet annotated
•
RPM - Calibration
The Interfaces and Indicators
Where supplied with an indicator or a signal interface
the outputs of the interface and the Transducer will both
be calibrated and detailed on a systems test certificate.
The outputs calibrated will be the +/-10Vdc, +/-5Vdc
and the 4-20mA signals.
The indicators and serial data outputs for the Ethernet,
USB and MODBUS ports are directly sent from the
Transducer. Interface options allow a scaling factor(s)
for these signals to be entered into the Interface.
In addition to the M425 range Datum Electronics
Limited manufacture a wide range of complimentary
torque sensors.
The RS and FF425 ranges are non-contact and
non-bearing sensors that can be tailored to fit a test rig or
drive application.
Within these ranges the Series 425 Electronics are engineered
to fit a shaft coupling of a section of an existing drive shaft.
These are fitted by Datum Electronics in the factory. They
have advantages where space is at a premium and a standard
transducer cannot replace an existing component without
major engineering work. They have further advantages in that
they can operate at higher speeds for longer duty cycles.
When used in harsh environments the RS/FF425 ranges can
be supplied full encapsulated.
With the sensor added to an existing shaft the dynamics of
the drive line will remain substantially the same.
RS425 Series
Transducer
FF Series
Transducer