K-Patents DD-01 - Manual (Page 14)

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5. CALIBRATION
The K-Patents Divert Control System is calibrated by the manufacturer. This chapter contains instructions how
to make the fine adjustment of the system.
5.1. REFRACTOMETER CONCENTRATION MEASUREMENT
For refractometer calibration consult also the separate Refractometer PR-01-S(-EX/FM) Manual.
The CONC% displays of the two Indicating transmitters have to show the same value. If there is a difference,
this can be eliminated by changing the Bias for one of the refractometers. Key in the sequence Calibrate / Pa-
rameters / CONC(RI) / Parameters / Bias. Comparison with sample determination can decide which one
should be corrected.
Example: If the Indicating transmitter of A displays CONC% = 63.2% and B displays CONC% = 63.8%, the
difference can be eliminated e.g. by lowering B by 0.6%. Read bias from the display of refractometer B. If
bias = 52.923 then enter a new bias = 52.323.
Due to its digital measurement principle, the readings of the K-Patents Process Refractometer do not drift by
time. Frequent recalibrations based on off-line moisture analysis must be avoided, as they will introduce ran-
dom fluctuations to the refractometer readings.
If the concentration reading is noisy, the damping can be increased. Enter Calibrate / Parameters / CONC(RI) /
Damping time. The Damping time is the time in seconds for the signal to reach half of its final value after a
step change. Increase the damping time in small steps, and wait for the result.
5.2. REFRACTOMETER ACTIVATION FOR DIVERT CONTROL
When a refractometer is activated for Divert control, the upper right corner of the display shows alternatively
A, a, B, b or ?. If the corner is blank the divert function must be activated by pressing the sequence Cali-
brate/Parameters/Divert control/Divert control and select "1 Activated".
The program has to be version 4.0 or higher, otherwise "8 Divert control" is missing from the CALIBRATE
menu. The program EPROM has then to be changed to an up-dated version.
The decision to display A (a) or alternatively B (b) is not programmed, it depends on to which SERIAL BUS
port in the Divert unit (Figure 3.13) the Indicating transmitter is connected.
If a Divert activated refractometer is used in another type of application, the divert function has to be deacti-
vated by selecting "0 Not activated". After de-activation all references to Divert functions disappear except "8
Divert control" in the CALIBRATE menu.
Note. If a message DIVERT CONTROL FAULT and a ? appear on the IT-R display, the reason is one of the
following:
1. Cables between the IT-R and the terminals 8-14 on the DD-01 are not properly connected. Re-
connect to fix.
2. Communication 485 component IC 17 (A) or IC 19 C (B) is broken on the PR-7310 board inside
the DD-01. Replace board.
3. Communication 485 component IC 1r is broken on the PR-7010 board inside the IT-R. Replace
board.
4. Dip switch 3. is in the “up” position which means that the PR-7310 card is configured to work in
the remote mode. Change the dip switch back to low (=off) position.
INSTRUCTION MANUAL FOR DD-01 DOCUMENT/REVISION: IMD 1/5
Effective: June 20, 2005