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7. ADJUSTMENT
In order to ensure the highest weighing accuracy, it is recommended to periodically introduce a
corrective factor of indications to balance memory, the said factor must be referred to a mass
standard. In other words, balance adjustment shall be performed from time to time.
Adjustment should be carried out:
• Before the beginning of weighing procedure,
• If long breaks between following measuring series occur,
• If temperature inside the balance changes more than: 1°C or 2°C for AS series balances or 2°C
for PS series balances.
Types of adjustment:
• Internal automatic adjustment
• Manual internal adjustment
• Adjustment with an external weight of declared mass which cannot be modified or of any mass,
but not lower than 30% of maximum range.
CAUTION!
In case of verified balances (with an internal automatic adjustment system) only automatic internal
adjustment and manual internal adjustment are available. Remember to carry out the adjustment
process when there is no load on the pan! When the weighing pan is loaded, command <RANGE
EXCEEDED> is displayed. In such a case remove the load and restart the adjustment process. Adjustment
process can be aborted if necessary by pressing Esc button at any time during the process.
7.1. INTERNAL ADJUSTMENT
Adjustment process can be initiated automatically and manually.
Manual means of activating adjustment procedure is achieved by pressing
button. System of
automatic adjustment will carry out the process fully automatically and will inform the user on
successive process stages.
Cycle of automatic adjustment process:
• Balance software detects the necessity of carrying out adjustment and signals it by displaying a
thermometer or clock pictogram and <Cal> sign at the top of the display, about 2-minute long
time interval within which weighing procedure can be completed takes place,
• As the 2-minute long time elapses, balance display indicates message CAL_30
and starts counting down from 30..29..28 to 0 (indicated value is the counter),
• Balance user has 30 seconds to make a decision
• In order to start adjustment, do not take any actions
• In order to complete weighing procedure, press Esc. When pressed, balance returns to
weighing procedure and displays last weighing result. In about 5 minutes balance indicates
CAL_30 message again.
• The adjustment process can be postponed for multiple times, but it needs to be pointed out that
postponing of adjustment for a long time may lead to larger errors of weighing process. The
errors are the effect of temperature changes and as a consequence changes of balance
sensitivity.
Automatic adjustment process has been designed for three different cases:
• Adjustment on plugging the balance to the mains – verified balances.
• Adjustment triggered by temperature change inside the balance. The balance is equipped with
a very precise system for monitoring temperature. At each adjustment process, the temperature
is recorded. The next adjustment is automatically initiated if temperature changes more than
1°C or 2°C (AS, PS series balances) from the last saved temperature.
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