Hardy HI 2151/30WC Single-Scale Controller - Manual (Page 87)

Chapter 6 - Calibration
6-9
Step 3. To select one of the sizes, use the up arrow
↑ or down arrow
↓ keys to scroll through the selections.
Step 4. The graduation size is recalculated each time the instrument is
calibrated for span.
Step 5. Press Enter to accept the selection. The Zero Tolerance
(OTOL) sub-menu appears on the display.
Setting the Zero
Tolerance (0 TOL) This sets a weight limit for an operator adjusting the weight of an
empty scale using the upper left ZERO push button. This value is the
zero tracking window and reflects an amount of weight differential of
an empty scale. Normally, a Zero Tolerance amount equal to 2% of the
total load cell capacity is acceptable. The default zero tolerance is 10
units of measure (10 is displayed). The maximum Zero Tolerance num-
ber that can be entered is 32766.
NOTE The amount of weight zeroed off is cumulative. The zero command will fail if the current
gross weight plus any previously zeroed amount exceeds the zero tolerance.
Step 1. Press the Enter button. The default display will appear (10) or
the previous set value (10).
Step 2. Press the -/Test/Clr button to clear the current value
Step 3. Use the numeric keys to enter the new value.
Step 4. Press the Enter button to accept the new value. Zero Tolerance
sub-menu (O TOT) appears on the display.
Setting The Auto Zero
Tolerance (A0 TOT) This parameter sets a weight limit that applies when the Auto Zero
Tracking feature (0 TRK) or a communication command adjusts an
empty scale. When 0 TRK is enabled, the display is reset to zero when
the weight is within the set limits and not in motion.When the Auto
Zero Tolerance (0 TOT) is enabled (Set Dip Switch #8, See Chapter 4),
any weight within the set zero tolerance limit will cause the display to
automatically read zero when the scale is not in motion.
Normally an acceptable Zero Tolerance amount is less than or equal to
1.5% of the total load cell capacity. The default auto zero tolerance is
10 units of measure, and the maximum number you can enter is 32766.
NOTES: Incorrect graduation size or a drifting scale with auto zero tracking enabled can damage
the SMM.
The amount of weight zeroed off is cumulative. The autozero command will fail if the
current gross weight plus any previously zeroed amount exceeds the zero tolerance.
Step 1. Press the Enter button. The default display will appear (10) or
the previous set value.
Step 2. Press the -/Test/Clr button to clear the current value
Step 3. Use the numeric keys to enter the new value.
Step 4. Press the Enter button to accept the new value.