Operating and Maintenance Instructions : FCU 2110-5 / FCU 2210-5
Edition 1.10
HYDAC Filtertechnik GmbH
Page 51 of 52
14
Explanation of Terms Used in Measurement and
Instrumentation Systems
Measurement point:
The name of the location at which the FCU is connected to
the hydraulic system. This designation (max. 20 characters)
can be entered in the FCU for documentation purposes.
Example: pump press W3
Measured value:
The current purity rating value.
Example: ISO 19/16/13
Measurement:
A measurement sequence begins immediately after
pressing the O
K
/S
TART
key. Typically, a new measured
value of the purity rating is shown in the display once a
minute (depending on the flow rate).
Averaging interval:
The time interval set by the user (in minutes) for which the
FCU’s measured values are averaged and saved.
Example: 1 minute (24 hrs. also possible, for example)
Log memory:
Once started a measurement sequence is continuous, i.e.
new values are continuously present which are sequentially
stored in the memory as log lines. When the memory is full
the oldest measured values are overwritten by the latest
ones (rolling-map memory). This ensures that no current
measured values are lost.
Log:
To prevent measurements taken at various measurement
points from being stored as one long continuous difficult-to-
manage column of numbers, the FCU automatically
compiles measured values to form
logs
and administers
them independently using so-called
log headers.
Log header:
Containing the log number (a sequential log number is
automatically generated every time a measurement
sequence is initiated).
The name of the
measurement point
(can be entered by the
user)
date + time of the beginning and end of the
measurement sequence
(generated automatically)
Averaging interval
Number of log lines (measured values)
Duration of the measurement series
Example:
Memory log: 6
D10 1234
from: 20 Oct 1996 8:32
to: 20 Oct 1996 10:39
Averaging interval: 0 [min]
Number of log entries: 3
length of log: 0:02
15 Technical Data and Specifications
Continuous measured value indication via LCD
