M
ANUAL
Z
ERO
A
DJUSTMENT
In those cases where
2240 PROcheck
has been in operation over a
period of several days
without interruption
a manual zero adjustment is
recommended. The user may trigger such manual zero adjustment by
pressing the push- button ”Reset” on the rear front plate of the CPU-
Module (see fig. 2, item 3).
The instrument will then initiate the power-up-cycle described in this
chapter. This sequence includes carrying out a zero adjustment.
C
YCLIC
Z
ERO
A
DJUSTMENT
In cases where the instruments are intended to serve in continuous op-
eration, it is recommendable for the user to opt for activation of the pro-
gram function "cyclic zero adjustment" at the manufacturer's side or by
authorized service personnel, rather than selecting the repetitive manual
triggered zero adjustment.
As an interval for cyclic zero adjustment any full hour within a time
frame between 1 and 35 hours may be set up to the program. The interval
to be set should reflect the intensity of operation as well as other local
influencing factors e.g. change of shift etc.
After every lapse of the programmed time interval
counting from the
start-up moment
, the measuring operation will be interrupted to be fol-
lowed by a zero point adjustment. Thereafter the measuring operation
will be resumed.
5.4 Automatic measurement operation
When programmed for automatic measuring operation,
2240 PROcheck
will directly change over to measurement operation after successful zero
adjustment (see
Chapter 5.6,
Measuring process).
15
