model 2704 controller installation and operation handbook - Soliton

Transducer Scaling
2704 Controller
Then follow the auto-tare calibration as follows:-
Do This
This Is The Display You
Should See
Additional Notes
1. Set the equipment at the normal tare point, eg place the empty container on the
weigh bridge
1. Press to ‘Tare Value’
2. Press or to enter
the required value
This will normally be zero.
When once set it will only
be necessary to access
this parameter again if a
new tare value is
required.
3. Press as many times
as necessary to scroll to
‘Start Tare’
4. Press or to ‘On’
This parameter can be
configured to be initiated
from a digital input and
wired, for example, to an
external switch. If this
has been configured this
parameter can be turned
on from this source.
The effect of auto-tare is to introduce a DC bias to the measurement, as shown in Figure 19-1
below.
New Scale High
Scale High
Tare
offset
Tare value
PV at tare point
Tare
offset
New Scaling
Original Scaling
New Scale Low
Scale Low
Tare
offset
Input Low
Input at autotare
point
Input High
Figure 19-4: Effect of Auto-Tare
Note:- A Tare calibration will change the values of ‘Scale High’ and ‘Scale Low’.
19-12 Installation and Operation Handbook. Part No HA026502 Issue 1.0 Apr -00