Operating instructions

Putting the balance into operation
12
2.5 Adjusting (calibrating) the balance
o
n
An adjustment (i.e. an adjustment to the acceleration due to gravity) is needed
when putting into operation for the first time and after every location change. In
colloquial language, this operation is frequently also referred to as "calibration"
(to avoid misunderstandings, this term is enclosed in brackets when neces-
sary). You should also adjust (calibrate) your balance at regular intervals in
weighing operations to obtain precise results. If you work according to GLP
(Good Laboratory Practice) and SOP (Standard Operating Procedure), please
note the stipulated intervals for the adjustment (calibration).
With PG-S balances you have various possibilities for adjusting (calibrating) or
checking the balance. You have a choice between the following parameters:
- Adjustment (calibration) or checking the balance,
- internal or external weights,
- automatic or manual initiation of the adjustment operation
The factory setting is fully automatic adjustment (calibration) FACT (Fully
Automatic Calibration Technology) with the internal weight. In this setting, you
have no need worry about adjusting (calibrating) your balance.
The balance adjusts itself automatically
- after the warm-up phase on connection to the power supply,
- in the case of certified balances, during the warm-up phase (after power
failure),
- when a change in the ambient conditions, e.g. the temperature could lead to
a noticeable deviation in the measurement.
—BALANCE CALIBRATION—
03.10.97 11:23:34
METTLER TOLEDO
Type: PG802-S
SNR: 1105238536
SW: 1.74 1.30
Internal cal. done
Signature:
If your balance is attached to a printer, the adjustment (calibration) is auto-
matically printed out in conformance with GLP. The record opposite is a
specimen printed out with the METTLER TOLEDO LC-P45 Printer.