17. Add-on Controller
91
Dr. A. Kuntze
I
Gutes Wasser mit System
Robert-Bosch-Str. 7a
40668 Meerbusch
+49 (0) 2150-7066-0 / Fax -60
www.kuntze.com
Note
More information on the various display designs can be found in chapter 12
– system functions.
In the manual mode you can operate the relays manually. With touch screen instruments press the
symbol of a relay to switch it. With instruments with key operation press key up until the desired relay is
highlighted, then switch the relay with the OK key.
Warning
Manually activated relay remain activated until they are manually switched
off or the operation mode is set to automatic!
17.7. Automatic controller stop
The instrument provides various safety measures to recognize problems and to stop the dosing if no
reliable measured values are available. Such situation occurs in case of the following events:
˃
If the measuring input or the temperature input receives no signal (no measured value available)
˃
If a digital input switches (no water, no reagent, or external controller stop – while the last option is
not a problem it still means that the dosing has to be stopped)
˃
Dosage check (possible damage on the feed lines)
It is your responsibility to ensure through set-up and settings that all these safety features can work as
planned and to check their proper function through regular tests! Also use the safety features that are
not controller-related, such as the alarm relay, the limits, and the 22mA alarm current.
WARNING
In the AUTO mode the controller actuates the dosing of possibly hazardous
chemicals! Check all connections, feed lines, and all settings before you
activate the controller, and make sure that the control works properly before
leaving the instrument!