15
Calibration Procedures
The best method of calibration, if it is possible to do so, is the
LiVE
calibration, as this reads in
the sensor signal at two calibration points and scales the TR150 automatically. If this is not
possible, then the sensitivity figure (in mV/V) from the sensor calibration certificate can be used
to scale the TR150, by using the
tAbLE
calibration. This may be the only option available if you
are unable to apply a known stimulus to the sensor, which quite often is the case.
LiVE
Calibration Procedure
(1) When
CALibrAt
is displayed, press
.
(2)
LiVE ?
will now be displayed. Press
.
(3) You will be prompted
uSE SC ?
. This can be selected if you wish to use the shunt
calibration figure from a sensor calibration certificate (care should be taken that the
shunt calibration resistor used originally with the sensor is the same as is fitted in
the TR150). If you wish to use this, press
;
otherwise press
.
(4) You will then be prompted with
APPLY LO
. At this point, ensure that the low
calibration stimulus is applied to the sensor and allow to settle for approx. 3
seconds. Then press
.
(5) You will then be prompted with
dISP LO
. Press
and enter the display value
required with the low stimulus applied to the sensor. The value can be entered by
using the
and
buttons to select a digit and the
and
buttons to
change the digit. When the value has been set, press
.
(6) You will then be prompted with
APPLY HI
(unless you chose to
uSE SC ?
, in which
case jump to the next stage)
At this point ensure that the high calibration stimulus is
applied to the sensor and allow to settle of approx. 3 seconds, then press
.
(7) You will then be prompted with
dISP HI
. Press
and enter the display value
required with the high stimulus applied to the sensor. The value can be entered by
using the
and
buttons to select a digit and the
and
buttons to
change the digit. When the value has been set, press
.
(8) You should now see
donE
displayed. This means the calibration was successful.
Press
to return the TR150 to normal operation mode, with the new calibration
data stored. If you see
FaiLEd
, then you will need to repeat the calibration,
checking that you have completed the procedure in the correct order, and that the
sensor is connected correctly.
UK / Europe Office
Tel: +44 (0)8700 434040
Fax: +44 (0)8700 434045
[email protected]
www.omniinstruments.co.uk
Australia / Asia Pacific Office
Tel +61 (0)282 442 363
Fax +61 (0)294 751 278
www.omniinstruments.com.au
USA / Canada Office
Tel +1-866-849-3441
Fax +1-866-628-8055
www.omniinstruments.net
