K-Patents PR-33-S - Manual (Page 28)

24 PR-33-S instruction manual
Document/Revision No. Rev. 1.4 Effective: May 15, 2015
adjustment to CALC. The adjusted concentration is called CONC. If there is no ad-
justment, CALC and CONC are equal. Thus the chemical curve is kept intact as a firm
base for the calculation, the adjustment is merely additional terms.
5. Damping: See Section 5.1.1.
6. Output signal: The output signal is transmitted over the Ethernet connection. By
adding an optional mA output unit, the Ethernet signal can be converted into mA
output.
5.2.1 The chemical curve
The chemical curve is the theoretical concentration curve based on n
D
and TEMP. It is
defined by a set of 16 parameters (Table 5.1, one set for each sensor).
C
00
C
01
C
02
C
03
C
10
C
11
C
12
C
13
C
20
C
21
C
22
C
23
C
30
C
31
C
32
C
33
Table 5.1 The chemical curve parameters
A chemical curve is specific to the given process medium, e.g. sucrose or sodium hy-
droxide. The set of parameters is given by K-Patents and should not be altered, except
in case of changing to another process medium.
K-Patents provides a field calibration service that adapts the calibration to the factory
laboratory determinations based on the data supplied. The field calibration procedure
should be made under normal process conditions using standard laboratory determi-
nations of sample concentration.
Record the calibrating data on the PR-33 field calibration form (found in the end of this
manual), also available at and by emailing a request to
<[email protected]>. Fax the completed Field calibration form to either K-Patents
headquarters or your local K-Patents representative. A computer analysis of the data
will be made at K-Patents and optimal calibration parameters will be sent to be entered
in the system.
For a complete report, 10–15 valid data points (see below) are needed. A data point
is of use for calibration only when the diagnostic message is
NORMAL OPERATION
.
Each data point consists of: