kajaaniMCA
i
– Installation, Operating & Service - 12.3 - W4610201 V2.5 EN
12.B. Operating
12.B.2. Calibration
Consistency calibration of the MCAi is made using the
C
ALIBRATION menu shown in Fig. 12.5.
12.B.1. Reading the measured values
The MCAi reports the measured values in the MEASURE-
MENTS menu (Fig. 12.4). Menu items:
• PV: Consistency (Primary Variable).
• Process: Process temperature, in the unit (°C or °F)
selected by the user.
• Chemicals: Change in chemicals content compared
to the time of calibration, measured at the micro-
wave signal level with the effect of temperature
eliminated by compensation. The applied unit is the
signal level unit u.
• Aout 1 mA: Value of consistency current output, in
mA.
• % of range: Value of consistency current output, as
percentage of the current output range.
• Aout 2: The value of the second current output
(temperature or chemicals content), in mA.
• Aout 3: The value of the third current output (chem-
icals content or temperature), in mA.
• Housing: Temperature of sensor electronics.
MCAi: MCAI-000
Measurements
1
2
3
4
5
.
.
6
7
8
HELP
PV
Process
Chemicals
Aout 1 mA
% of range
.
.
Aout 2
Aout 3
Housing
SAVE HOME
3.05 %
52.3 degC
0.0 u
12.3 mA
50.6 %
7.5 mA
12.1 mA
35.3 degC
Fig. 12.4. Measurements menu.
MCAi: MCAI-000
Calibration
1
2
HELP
Start Sample
Lab results
SAVE HOME
Fig. 12.5. Calibration menu.
Sampling
The MCAi consistency measurement is calibrated us-
ing a single calibration point. In the C
ALIBRATION menu
select S
TART SAMPLE; the MCAi begins to average its
measurement result and responds “Sampling”. Take at
least three parallel samples, and then press OK. The unit
then displays the averaged consistency (A
VERAGE) and
standard deviation (D
EVIATION) during sampling, and
the T
EMPERATURE, SIGNAL L EVEL and CHEM COMP (chem-
ical compensation) values. Press OK to accept.
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