FT-13 Technical Manual, Rev. 1.40 March 2013
Page 16 of 56
6.5 Scale Calibration
[3--] Calibration Block
The calibration of the scale will be performed here. First check that the load cell connection is established and
your scale capacity respective scale resolution is correctly defined. If this is fulfiled you can proceed.
[30-] Calibration
[301 ] Calibration
1. Begin the calibration by pressing <Enter>.
2. Unload the scale when the displays shows [ZEro.CA]
message and press <Enter>. The display will
show the
[WAıt ] message during the
zero calibration
. In this period the scale must be unloaded and
stable.
3. Approximately 10 seconds later the display will show [LoAd ] and then [ XXXXXX ]. The value shown
on the display is the weight that should be used for the span calibration. If the value of the test weight
which will be used is different from the value shown on the display, type the new value by <Tare> and
<Zero> keys, place the test weights on the scale and press <Enter>. Any test weight should be at
least 10% of the scale capacity or higher. The display will show the
[WAıt ] message during the span
calibration.
4. Approximately 10 seconds later the display will show the [SAvE ]
message. You can save the
calibration by pressing <Enter> or quit without saving by pressing the <F> key.
[31-] Adjustment
In this sub-block you can only perform zero adjustment or span adjustment without doing a full calibration.
[310 ] Zero Adjustment
This parameter is only used for refreshing the zero level of the scale to prevent wrong weighings due to
zero drifts. Begin the zero adjustment by pressing <Enter>. Unload the scale when the displays shows
the [ZEro.CA]
message and press <Enter> again.
The display will show the
[WAıt ] message during the zero adjustment. In this period the scale must be
unloaded and stable. Approximately 10 seconds later the display will show the [SAvE ]
message. You
can confirm the “Save zero adjustment” by pressing <Enter> or cancel it by pressing the <F> key.
[311 ] Span Adjustment
This parameter lets you perform the span adjustment. By pressing the <Enter> key [XXXXXX] appears
on the display. The displayed value is the weight that should be used for the span adjustment. If the
value of the test weight that will be used is different from the value shown on the display, then type the
new value by <Tare> and <Zero> keys, place the test weights on the scale and press <Enter>.
The display will show the
[WAıt ] message during the span adjustment. Approximately 10 seconds later
the display will show the [SAvE ]
message.
You can confirm the “Save span adjustment” by pressing
<Enter> or cancel it by pressing the <F> key.
[312 ] Span Adjustment Under Load
This parameter is being used to perform span adjustment of a scale without lifting the load from it. This
operation is especially used for span adjustment of filled tanks. You can make span adjustment without
removing the load in the tank.
When you press the <Enter> key the [P.ZEro ] message appears on the display. This means the scale
will take the current load as a temporary zero. After getting ready for this level, which means temporary
zero adjustment, the <Enter> key should be pressed. The display wil
l show the [WAıt ] message during
the temporary zero adjustment. After this step the display will show [LoAd ] for a certain period and then
[ XXXXXX ]. The value shown on the display is the weight that should be used for the span adjustment.
If the value of the test weight which will be used is different from the value shown on the display, type the
new value by <Tare> and <Zero> keys, place the test weight on the scale and press <Enter>. The
display will show the [WAıt ] message during the span adjustment under load. Approximately 10 seconds
later the display will show the [SAvE ]
message.
You can confirm the “Save span adjustment under load”
by pressing <Enter> or cancel it by pressing the <F> key.
