OHAUS 7000 Series, Инструкция по эксплуатации, Страница: 29 / 134

7000 SERIES INDICATORS EN 23
Several conditions could inhibit the preset tare function:

Keyboard Tare Disabled
– If keyboard tare is configured in setup as disabled, the numeric keypad and the
TARE scale function key cannot be used to obtain a tare.

Over-Capacity or Under-Zero Conditions
– Preset tare is not allowed when the weight display indicates over
capacity or under zero conditions. Any preset tare attempted when the scale is over capacity is ignored and a
“Tare Failed–Over Cap” error displays. Any preset tare attempted when the weight display indicates an under
zero condition is ignored and a “Tare Failed–Too Small” error displays.
A preset tare can be entered in free format. If the entered value does not match the displayed weight decimal point
location or display interval, the entered tare value is rounded to the nearest display interval and the decimal point
adjusted to match the gross weight. The rounding method is that 0.5 or more of a display interval (d) is increased to
the next display interval and 0.49 or less of a display interval is decreased to the next lower display interval.
When entering a preset tare value less than 1.0, the operator can enter the data without the leading zero (left of the
decimal point), but all subsequent display, storage, or printing of this value will include the leading zero. For
example, a preset tare entry of .05 will display as 0.05.
If a preset tare has already been established and another preset tare is entered, the second preset tare replaces
the previous value (it does not add to the previous value). The replacement tare can be larger or smaller than the
original tare value.
Net Sign Correction
Net sign correction enables the terminal to be used for both shipping (inbound empty) and receiving (inbound
loaded) operations. Net sign correction can be either disabled or enabled on the T72XW.
If net sign correction is disabled in setup, the stored weight value in the tare register is assumed to be a tare
regardless of the gross weight present on the scale at the time of the final transaction. Net values can therefore be
negative if the weight on the scale is less than the tare value.
If net sign correction is enabled, the terminal will switch the gross weight and tare weight fields when necessary, so
that the larger weight is the gross weight, the smaller weight is the tare weight, with the difference always a positive
net weight. Net sign correction affects the display and printed data.
An example of weight values with and without net sign correction is shown in Table 2-9. In this example, the tare
register value is 53 kg and the live weight on the scale is 16 kg.
Table 2-9: Weight Values With and Without Net Sign Correction
Net Sign Correction
Printed and Displayed Disabled Enabled
Gross 16 kg 53 kg
Tare 53 kg 16 kg
Net

37 kg 37 kg
Automatic Tare
The T72XW can be configured so that tare is automatically taken (auto tare) after the weight on the scale exceeds
a programmed tare threshold weight. Auto tare can be configured in setup as enabled or disabled. When auto tare
is enabled, the display changes to a zero net weight indication after the weight exceeds the threshold
value. The previous weight on the scale is stored in the Alibi Table as the tare value. Auto tare operations involve:

Tare Threshold Weight
– When weight on the scale platform exceeds the tare threshold value, the terminal
automatically tares.

Reset Threshold Weight
– The reset threshold weight must be less than the tare threshold weight. When the
weight on the scale platform falls below the reset threshold value, such as when a load has been removed, the
terminal automatically resets the auto tare trigger.