18
6.13 Serial Number
Every unit bears its own unique
serial number. The serial number
may not be changed during a
software update.
– The serial number is entered for
the first time during production
of the unit.
– If the PCB has to be replaced
during repairs that may arise later,
the unit must be assigned the
exact same serial number that is
imprinted on the manufacturer’s
label.
6.6
Self-Test for Broken Conductors
and Short-Circuiting
While controlling the valves and
sensors, the Sartocheck
®
3 plus
hardware can check whether there
are any broken conductors or
short-circuits.
6.7
Calibration
The calibration function is used
to calibrate the internal pressure
sensor with the aid of more precise
reference measuring devices and to
adjust it if necessary. Each sensor
runs its own calibration date.
An adjustment routine automati-
cally follows the test. The test can
also be activated separately.
Sartocheck
®
3 plus saves the raw
data for the calibration record in
permanent memory.
The operator can use the following
sensor types for determining the
reference pressure:
– Absolute pressure sensor:
The reference pressures are meas-
ured directly.
– Relative pressure sensor:
The measured reference pressures
relate to the ambient pressure. The
ambient pressure must be known or
measured with additional reference
measuring equipment.
6.8
Internal Pressure Sensor
Sartocheck
®
3 plus sets either 6 or 8
pressure values and compares them
with the internal pressure sensor
and the pressure values measured
on the reference measuring instru-
ment (connected to the “OUT”
connector) to calculate scale and
linearization.
6.9
Pressure Gauge Function
In the pressure gauge function,
the Sartocheck
®
3 plus behaves
like a digital pressure measuring
device. To do so, it uses the internal
pressure sensor.
6.10
Cleaning|Drying
Through the pneumatic connec-
tors, Sartocheck
®
3 plus is able to
flush almost all internal volumes.
The user is responsible for ensuring
that no damage occurs to any com-
ponents of the Sartocheck
®
3 plus
due to the pressure built up by the
pump used in the cleaning.
6.11
Safety Functions
– As one of its technical options,
Sartocheck
®
3 plus runs the test
step Initialization|Security Status in
the event of a power failure. Basi-
cally, what this step does is close
the compressed air supply and the
block valve to the filter housing.
– Sartocheck
®
3 plus is not responsi-
ble for ensuring whether the maxi-
mum pressure for the compressed
air supply to the filter housing is
too high. That means the user must
make sure that the initial pressure
cannot damage the filter housing.
6.12
Software Update
The operating software on
Sartocheck
®
3 plus is updated
with a corresponding program run
exclusively with an external Laptop
(via the jacks Service MU| Service
TU). Since the configuration data
are localized in a battery-backed
RAM, they remain unchanged
during any software update.
