USF Wallace & Tiernan DEPOLOX 4, Manual

Page: 38 / 113

12.2 FUNCTION MENUS (CL
2
AMPLIFIER)
TEST DISPLAY DESCRIPTION POSSIBLE SETTING
ZRO mg/l
Zero calibration Sets zero point at 0.00 mg/l
DPD mg/l
Measured value calibration Sets value determined by DPD
method
RGE mg/l Selection measuring range 1.00 / 2.00 / 5.00 / 9.99 mg/l
500 ppb
± µA
Display of cell current in µA -5 ... +200 µA
DAY
MONTH
YEAR
HOUR
MINUTE Parameters for COM-interface
(realtime clock) switch S1-4
(refer to chapter 11.6) 01...31
01...12
00...99
00...23
00...59
12.3 PARAMETER SET-UP DURING INITIAL OPERATION
NOTE:
The following settings are reference values for the initial operation of a Cl
2
residual control system. The quality of regulation may be optimized by the user
himself with the help of a recorder.
It is essential to change only one controller parameter at a time and to check
the result after 2 to 3 days on the recorder tape.
It is recommended to change the prop. band Xp first and then the D-factor. It is
advisable to write the optimal user-specific values in the parameter and function
menus into the provided sticker in the terminal cover.
By measuring the dead times using a stop watch it is also possible to have the
controller parameters calculated automatically by the amplifier-controller (auto-
adaptation).
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