kajaaniMCA
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– Installation, Operating & Service - 6.2 - W4610201 V2.5 EN
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Enter target value for the signal level
and press Set. Wait till Ready and
accept with OK.
Target value:
High 60 u
limit
80 u
Signal level:
u
Low
limit
20u
Set OK
Fig. 6.4. Signal level setting display.
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MCAI DESCRIPTOR
MCAI-000
———————————————————————————————————————————
Start up done!
Please calibrate and set the current
output range.
UNDONE UNDONE UNDONE
Take Enter Current Selfdiag-
sample lab Output nostics
Fig. 6.5. Main Menu display after initial configuration.
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Fig. 6.3. Device info display.
Enter date, time ...
Date: 17-10-00
Time: 10:20
Installation info: “MCAI DESCRIPTOR”
Tag number: “MCAI-000”
Temperature unit: CELSIUS
Use password: YES (3121)
NEXT CONTINUE
6.A.3. Device info (Enter date, time...)
The display shown in Fig. 6.3 contains settings for date,
time, temperature unit, tag number, installation point,
and password. Use the UP/DOWN arrow keys to move
from field to field, and press [ENTER] to accept the
selected values. Select the required temperature unit
and password usage with [F5&F6] N
EXT. The fields are:
• Date: enter the date of start-up.
• Time: enter the correct time.
• Installation info: location (not compulsory).
• Tag number: tag for sensor identification (not
compulsory).
• Temperature unit: Celsius or Fahrenheit.
• Use password: select whether the software will ask
for password e.g. before opening the “Enter lab”
display.
6.A.4. Signal level
The microwave signal level is set in the display shown
in Fig. 6.4. The received microwave signal must remain
within a certain operating range. The signal level is
affected by the temperature and conductivity of the
measured medium.
As default, the MCAi adjusts the signal level to the
middle of the operating range, so that there is maximum
room for adjustment to both directions. This is the best
setting if no large temperature or conductivity swings
occur in the process. However, if the process tempera-
ture or conductivity show large variation, these must be
taken into account when setting the signal level.
A higher chemicals content will lower the signal
level, and a lower temperature has the same effect. If
such changes are likely to take place in the process, the
signal level must be set closer to the high limit to make
sure that it remains within the correct range also during
process variations. Similarly, a lower chemicals con-
tent and higher temperature will push the signal level
upwards. If such changes are expected, the signal level
must be set closer to the low limit to make sure that it
remains within the correct range.
In the signal level setting menu, accept the default
signal level or give a new target level and press [F1&F2]
S
ET. The sensor will adjust the signal level as close to
the target as possible, and display the set level on the
screen. Press [F7&F8] OK to accept.
6.A.5. Initial configuration ready
When the signal level has been set, the software will
initialize the measurement; this takes 1–2 minutes to
complete. When the setup is ready, the Main Menu
(Fig. 6.5) will appear. The next steps in the start-up
procedure are consistency calibration (section 7.A) and
current output scaling (section 6.B). If these steps have
not been completed, the text UNDONE is shown above
the name of the function. The MCAi is ready to start
measurement once these configurations are ready.
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