OHAUS T72XW AM, Instruction Manual

Page: 44 / 143

EN 36 7000 SERIES INDICATORS
This message functions only as a recommendation to recalibrate. After the warning message is acknowledged by
pressing the
ENTER
key, the user is presented with the “Capture Span OK” screen. Service personnel should then
carry out the following:

The scale should be recalibrated with a lower capacity. Potential analog section saturation does not force a
failure in calibration.
IMPORTANT: It is critical that service personnel follow the recommendation to recalibrate. Analog section
saturation will result in a ‘freeze’ of the display, where the display no longer shows increases in
weight, creating the possibility of overfills and spills during the weighing process.
Zero
This section provides access to Auto Zero Maintenance (AZM) settings, under zero blanking, power-up zero, and
pushbutton zero parameters.
Auto Zero
AZM is a means of tracking zero when the scale is empty. AZM compensates for conditions such as indicator or
load cell drift or debris on a scale platform.
Use the Auto Zero setup screen to enable auto zero for gross weighing or gross and net weighing, or to turn auto
zero off.
Auto Zero Range
Set the auto zero range for the number of divisions (d) around the current zero setting in which auto zero will
operate. Selections include 0.5, 1, 3 and 10 d.
Under Zero Blanking
When Under Zero Blanking is set to Disabled, the indicator displays a negative weight as far below zero as
possible when the weight goes under gross zero. Other options are:
20d The indicator displays a negative weight until 20 divisions below zero, and then blanks
the display.
20d with Zero The indicator displays a negative weight until 20 divisions below zero, and then blanks
the display. The display remains blanked until the scale is manually zeroed. This feature
is required for approval in Thailand.
Power Up Zero
A Power Up setting of Disabled enables the indicator to save and reuse the last zero reference weight after a
power cycle so it returns to the same gross or net weight value. If a power up range of +/-2% or +/-10% is selected,
the indicator tries to capture zero upon power up.
For example, if the setting for Power Up Zero is set at 2%, Power Up Zero will only occur when the weight reading
on the scale is /- 2% of the original calibrated zero condition.

If Power Up Zero capture is enabled and the weight on the scale is outside of the zero capture range, the
display will indicate [ E E E ] until the weight is removed and zero is captured.
Pushbutton Zero
If Pushbutton Zero is Disabled, the front panel ZERO pushbutton will not operate to capture a new zero reference
point. If a range of +/-2% or +/- 20% is selected, pushbutton zero will operate within the selected range to rezero
the scale.

If Pushbutton Zero is Disabled, execution of a remote Zero is still possible via SICS or CPTZ commands from
a PC and a discrete input command.
For example, if the setting for Pushbutton Zero is set at +/-2%, the Pushbutton Zero can only be used when the
weight reading on the scale is /- 2% of the original calibrated zero condition.
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