Nova-Tech PGW Series - Manual (Page 25)

Page 25 of 44
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 2ºC
2. Time since last calibration exceeds a preset time, typically 4 hours or 15
minutes after power is applied.
On the balances with internal calibration 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.
On balances with external calibration the balance will call for calibration to be
carried out 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:
Unstable readings
Improper calibration weights being used
Large shifts of zero from the factory settings
When an error is found a displayed message will be shown and the
calibration must be done again. If the balance has error messages more than
once it is possible the mechanics have been damaged.
© Adam Equipment Company 2007