Water Hardness Analyzer
AW101 Testomat
4 Description of Displays and Operating Features
8
IM/AW101
Rev. C
4.6 Description of the Signal Inputs and Output
M
BASIC PROGRAM
PROGRAM VALUES
INPUT STOP
M
BASIC PROGRAM
PROGRAM VALUES
WATER
METER
M
BASIC PROGRAM
PROGRAM VALUES
0/4-20 mA
4.7 Function Characteristics
Mode of operation (Analysis controller)
Time Control – internal triggering by a timer. The shortest
interval = 0 minutes between analyses, longest interval =
99 minutes. – see page 9.
The analysis interval is determined by the duration of the
set flush times the programmed (interval) and the duration
of the analysis. The analysis duration is a direct function of
the value to be measured.
Quantity Control – triggered by the water meter. Minimum
interval = 1 liter, maximum interval = 9999 liters. After the
programmed water quantity is measured, the analysis is
carried out. Prior to the analysis, the capillary and the
measuring chamber are flushed (observe the programmed
flush times).
The current analysis interval can be interrupted by initiating
the 'Stop' relay contact.
Caution.
Connect the signal inputs 'Stop' and 'IN' to volt-free contacts only.
Function
Type of contact
Action
Stop
External analysis stop (for example, via
flow controller or from a process
controller)
Programmable normally
closed/normally open volt-free.
No analyses are carried out while the contact at the input is
open or closed.
IN
Water meter input
Normally closed/ normally open
volt-free or turbine
Analysis starts after a configured sample quantity is reached.
Table 4.2 Stop External Analysis Stop
Fig. 4.2 Installation Example for the Water Meter
Function
Terminal
Action
Current 0/4-20mA
max. load 350 Ohm
programmable 0 - 20 mA or 4 - 20 mA
Table 4.3 OUT Interface Output
Turbine (max. 12V)
Contract Water Meter
+12V 24
IN
20 21
IN
20 21
+
-
Содержание AW101
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