User manual

Page 56 Setup – PAT700 Total Organic Carbon Analyzer
Operator Manual Anatel
Digital control tab
Figure 5-4 TOC dialog box, 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.