OHAUS T72XW AM, Instruction Manual

Page: 32 / 143

EN 24 7000 SERIES INDICATORS
Table 2-8: 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 indicator
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
indicator automatically resets the auto tare trigger.

Motion Check
– A motion check is provided to control the re-arming of the auto tare function. If disabled, the
auto tare trigger will be reset as soon as the weight falls below the reset value. If enabled, the weight must
settle to no-motion below the reset threshold before the next auto tare can be initiated.
Several conditions could inhibit the auto tare function:

Motion
– Auto tare cannot be taken when the scale is in motion. If motion is detected after the weight on the
scale exceeds a preset tare threshold weight, the T72XW will wait for a no-motion condition. If a stable (no
motion) weight condition occurs within three seconds, the auto tare command is executed.

Auto Tare Disabled
– Auto tare can be configured in setup as enabled or disabled.
Clearing Tare
Tare values can be cleared manually or automatically.
Manual Clear
Manually clear tare values by pressing the CLEAR key on the numeric keypad when the T72XW is in the
net mode and has completed the weighing operation. Motion on the scale will not impact a manual clear.
If configured in setup, pressing the ZERO scale function key will first clear the tare, then issue a zero
command (see Chapter 3, Configuration: Indicator, the Scale section, Auto Clear).
Auto Clear
The T72XW can be configured to clear tare automatically when the weight returns to a value below a
programmable threshold, or when a print command is issued. Once the tare is cleared, the display returns to the
gross weighing mode.
Auto clear is disabled or enabled in setup. If auto clear is enabled the following parameters, configured in setup,
affect the auto clear operation:

Clear Threshold Weight
– The clear threshold weight is the gross weight value below which the T72XW will
automatically clear a tare after settling to a value above this threshold value.

Motion Check
– A motion check is provided to control the automatic clearing of tare. If the motion check is
disabled, the tare value is cleared as soon as the weight drops below the threshold weight (auto clear
threshold), regardless of the motion status.
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