Nova-Tech PW Series - Manual (Page 26)

Page 26 of 48
© Adam Equipment Company 2007
100g is the default calibration mass. Using the numeric entry method,
the user may alter the displayed value to any value ranging from one-
third to full capacity of the balance.
• The balance will then show the value of the calibration mass selected
sounding a beep
• Place the selected mass on the balance. Press [Enter] to continue
The display will show the busy symbol and after calibration is complete it will
display “UNLOAD” sounding a beep. Remove the weight. Another beep will
be heard confirming the unloading action. The balance will then return to
normal weighing.
10.2 AUTOMATIC CALIBRATION
The balance will have the ability to calibrate (or ask for calibration) when the
balance has automatic calibration enabled and the conditions of the
automatic calibration have been meet.
Conditions that will cause an automatic calibration are:
1. Internal temperature change greater than a preset amount, typically
0.5ºC for the Analytical balances.
2. Time since last calibration exceeds a preset time, typically 4 hours or 15
minutes after power is applied.
The calibration will be done automatically when the balance is at a stable
zero. . The user knows a calibration is asked for by the flashing of the “CAL”
symbol on the display. The display will show a 5 second countdown when
calibration will start. If the user presses the
[Esc] key the calibration will be
delayed one minute to allow time for a process to be finished.
For external calibration the balance will call for calibration to be performed by
flashing the “CAL” symbol on the display. As soon as the balance is
calibrated the symbol will be turned off.
The Auto calibration feature can be enabled, disabled or changed within the
user options to meet the requirements of the users.
10.3 CALIBRATION ERRORS
Occasionally during calibration an error will be detected. These errors can be
caused by: