Hach ANATEL PAT700 User Manual - page 60
Page 58
Setup
5.3.3 Digital control tab
Control with digital inputs checkbox allows control of TOC analysis and operation
mode through the use of the two digital inputs. The default setting is disabled. If enabled,
the analyzer enters the mode defined by input 2 and TOC analysis can be initiated using
input 1.
Note: When analyzer operation is selected for control by digital inputs the Normal Operating Modes
in the Run Mode dialog box do not apply. All control is activated using the digital inputs.
The control required to activate digital inputs 1 and 2 can be configured by the user.
•
In the default setting a high to low (applying power for at least 500 mSec) transition on
digital 1 aborts the current operation and immediately runs a single TOC analysis. The
analysis runs to completion regardless of whether subsequent trigger values are
received.
•
In the default setting, if digital input 2 is high (no power applied), the analyzer enters
online TOC analysis mode. If digital input 2 is held low (power applied) the analyzer
enters conductivity mode.
Invert Digital Input 1 changes the default state for control of digital input 1 from a high to
low trigger to a low to high trigger. When Invert Digital Input 1 is selected, the analyzer
stops the current operation and runs a single TOC analysis when a trigger is applied to
the input by removing power across pins 1 and 2 for at least 500 mSec.
Invert Digital Input 2 changes the default state for control of digital input 2. When Invert
Digital Input 2 is selected, the analyzer will be in TOC mode when power is supplied
across pins 1 and 3 (low state). When power is not applied across pins 1 and 3 the
analyzer runs in flow with conductivity mode.
Figure 35 TOC dialog box, digital control tab