Calibration And Adjustment - Denver Instrument P-114 Operating Instructions Manual

Calibration and Adjustment

Calibration technically means to
determine the difference between
the weighing instrument readout
and the actual weight on the platform
to determine the accuracy. Adjust-
ment means to bring a weighing
instrument to the level of accuracy
required for its use and adjusted.
Although the term "calibration" is
used throughout this manual, as is
common in the USA, we are referring
to "adjustment" (see first paragraph).
Your balance was calibrated at
the factory; however, it must be
re-calibrated upon installation and
subsequently on a regular basis.
The recommended calibration inter-
val is once per week, using a certified
calibration weight. Calibration must
also be performed any time the
balance has been moved, leveled,
or disconnected from power, as well
as following a significant change in
ambient temperature. Additional
calibration may be required for
compliance with ISO/GLP standards.
Note on Verified Balances Used
in Legal Metrology:
Before using your balance in legal
metrology, perform internal calibra-
tion at the place of installation.
External Calibration/Adjustment*
1. Remove all items from the balance.
2. Press TARE.
3. Carefully center the calibration
weight on the weighing pan.
4. Press the key.
5. The display shows "CAL" and
the weight.
* on verified PI ... A models, external calibration must be performed
by a Denver service technician.
12
6. When calibration is complete, the
weight value is displayed and the
balance returns to the normal
weighing mode.
Internal Calibration (PI models only)
1. Remove all items from the balance.
2. Press TARE.
3. Press the key.
4. The display shows "CAL Internal"
and calibration is performed
automatically.
5. When calibration/adjustment is
complete, the balance automatically
returns to the normal weighing
mode.
Note:
If "Internal Cal" is deactivated ("Off"
in the operating menu), only external
calibration can be performed.
If calibration/adjustment cannot
be completed, an error message
is displayed. See "Troubleshooting
Guide" for details on error codes and
messages.