Hitec Luxembourg S.A. |
5, Rue de l’Église, L-1458 Luxembourg
www.hitec.lu | [email protected] | Tel.: (+352) 49 84 78 - 1 | Fax. (+352) 401303
File Name: HTCA_003-DADS-UserManual.docx
Document Type: End User Manual | Version date: 01/05/2010 | Last Printed: 15/02/2011
Page 54/81
Type E – Machine Calibration
For design reasons, it is only possible to apply a known torque with a special device by
Brabender. It is however possible to adjust the DADS terminals offset and gain to read the
same as the torque reading display in the Brabender Absorptometer.
1. Make sure no forces are applied to the torque sensor and/or rotor blades. Click on
the
Calibrate Offset
button. The
Terminal measure
value should be near to zero
now.
2. Apply any torque to the rotor blades directly or via the torque sensor, which is
accessible through the right side cover (qualified personnel only). The torque should
be 5Nm (Brabender display 5000) or more and should remain stable.
3. Insert the torque value, which is displayed on the Brabender instrument in the
Torque
textbox
. The equivalent weight value will be displayed in the
Weight
textbox.
4. Click on the
Calibrate Gain
button. The value of
Torque
textbox should be displayed
now on the
Terminal measure
value.
5. The procedure may be repeated as necessary. Click on
Save
in case the values are
all OK. The calculated offset and gain are saved now and used for the further
measurements. You may
Exit
without saving the new calibration values.
Remarks:
The calibration mass should be between 5 and 10 kg.
The torque values indicated are in mNm units.
At Zero-torque, a value of ± 20 should be acceptable.
The torque calibration should be done at least once a year.
In case that only one of the calibration buttons is pushed (Offset or Gain) and
Save
is
pushed, a warning message is displayed. This is nevertheless possible for instance
to only adjust the offset.
Encoder Zero
This operation is valid for type B tester only.
The type B tester must be installed the type B interface kit, which includes an encoder to
read the torque needle position. The gain is fixed and cannot be changed. Only the offset
(zero reading) with the torque indicator at zero position can be reset.
To make the encoder offset calibration make sure there is
no torque applied
and choose
this menu. The application will read the torque offset value and save it in the configuration
file. The next window will be displayed to confirm the operation.
