Configure the flow during idle mode
Select the state the analyzer will enter while it waits for the next analysis (cycle) to start. The
analyzer will only enter idle mode if the cycle time is more than the combined flush time and oxidation
time.
1. Push << to show the sliding menu.
2. Push the SETUP icon.
3. Push TOC.
4. Select the Idle tab.
5. Select an option.
Option Description
Without conductivity The bypass valve opens during idle mode. There is continuous flow through the
bypass loop. No conductivity is reported.
With conductivity The sample valve opens during idle mode. There is continuous flow through the
sample cell. Conductivity of the water is reported.
None The analyzer sample valve closes during idle mode. There is no flow through the
sample cell.
Configure digital control
Enable the digital inputs and set the states for digital input control as necessary.
The two digital inputs are optically isolated. The inputs are rated for 5–30 VDC, 2–15 mA. Terminals
4 and 5 of the discrete input terminal supply a 12 VDC output that can be used to drive each digital
input. Both digital input 1 and digital input 2 share a common positive power connection. In the
default setting:
• Digital Input 1—A high to low (power supplied for at least 500 milliseconds) transition on digital
Input 1 stops the current operation and immediately starts a single TOC analysis. The analysis
goes to completion regardless of whether subsequent trigger values are received. When the
analysis is complete, the instrument goes back to the previous run mode.
• Digital Input 2— When digital input 2 is high (no power supplied), the analyzer enters online TOC
analysis mode. If digital input 2 is held low (power supplied), the analyzer goes to conductivity
mode.
1. Push << to show the sliding menu.
2. Push the SETUP icon.
3. Push TOC.
4. Select the Digital Control tab.
5. Select an option.
Option Description
Control with
digital inputs
Enable the two digital inputs to control the TOC analysis and run mode (default =
disabled). When enabled, the normal operating modes shown on the Run Mode window
do not apply.
Note: When a TOC analysis is started with digital input 1, the analyzer ignores all other
commands through the digital inputs.
Return to defined
run mode
Completes the current TOC analysis, then goes to the previous run mode.
When not selected, the normal operating modes in the run mode dialog box do not
apply. All control is activated with the digital inputs, which lets the user toggle between
TOC mode and conductivity mode.
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