metso automation kajaaniMCAi, Installation, Operating & Service Manual

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kajaaniMCA i – Installation, Operating & Service
- 5.4 -
W4610201 V2.5 EN
5.F. Operating with Display Unit
The Display Unit functions as a fixed display for MCAi
measurements. The Display Unit can also be used for
some operations – sample taking, reading measured
values, self-diagnostics, and device information – so
that the portable terminal need not be used in all cases.
For instructions see the later sections of this manual.
Function keys of the Display Unit (Fig. 5.5):
•
SAMPLE: starts and stops sample taking.
• RESULTS: scrolls the sample measurement values
on the screen.
• MEAS: scrolls the momentary measurement values
on the screen.
• DIAG: reports the device status, scrolls occurred
errors on the screen.
• INFO: shows the device information.
5.F.1. Reading measured values
Press the MEAS button, and the Display Unit will show
the momentary consistency (Cs). When the MEAS
button is pressed several times, the MCAi will show the
following measured values:
•
CS: consistency (%Cs).
• DEV: standard deviation of consistency.
• T: temperature (°C or °F).
• ML: signal level (u).
• CH: chemical amount (u).
• CC: chemical compensation value.
5.F.2. Reading device information
The set device information can be scrolled on the
Display Unit. Press the INFO button, and the MCAi
Display Unit will show the sensor type, e.g. FT-200.
When the INFO button is pressed several times, the
MCAi will show the date when the sensor was started
up, and its software version.
5.F.3. Taking samples
To start sample taking press the SAMPLE button, and
the Display Unit will read “Sampling”. Take a sample,
and then press again the SAMPLE button. When the
sample taking has been stopped, the Display Unit will
read “Ready”. Press the RESULTS button to scroll the
following results on the screen:
•
CS: consistency (%Cs).
• DEV: standard deviation of consistency.
• T: temperature (°C or °F).
• ML: signal level (u).
• CH: chemical amount (u).
• CC: chemical compensation value.
H A R T
R E S U L T
S A M P L E
I N F O D I A G M E A S
R
M C A
i
C S = 3 . 0 8 %
Fig. 5.5. Display Unit.
5.F.4. Reading diagnostics data
Press the DIAG button, and the Display Unit will show
the current status of the sensor. If the device is operating
without problems, the screen should read “OK” (if
recipes are used, also the recipe number will be shown).
If the self-diagnostics feature has detected an error, the
screen will show an error message. When the DIAG
button is pressed again, the sensor will show if any other
error messages are currently active.
The possible error codes are:
•
Error 1: Measurement signal level low.
• Error 2: Measurement signal level high.
• Error 3: Reference signal level low.
• Error 4: Measurement signal unstable.
• Error 5: Reference signal unstable.
• Error 6: Temperature measurement error.
• Error 7: Consistency is higher than current output
high limit.
• Error 8: Consistency is lower than current output
low limit.