Redundant TC Setup

 

This option allows the operator to choose which TC to control in a redundant TC setup.  The redundant TC setup allows for two thermocouples to be used and measured from.  This option can be configured so that the higher or lower is automatically selected or in manual mode so that the operator can choose which TC to use.    Band The Band lets the user set how far apart the values of the TCs in the redundant setup can be before an alarm is activated.  The alarm can be assigned under the Relay Assignment menu option.  The range for this  is -4000 to 4000.

 

Delay Time

This is the time in seconds that will pass once the TCs go out of band before an alarm is activated to prevent excessive, unnecessary alarming.  The range is 0 to 3200 seconds.

 

TC Selection

To change this option from TC 1, the select mode must be in manual.

 

Select Mode

This allows the operator to choose whether the highest or lowest TC will automatically be chosen, or whether it will be manually chosen by the operator.  The options are highest, lowest, and manual.

 

Manual Override

If the 9215 has redundant TC active, then digital inputs 2 and 3 can manually override the system and force the selected TC to be TC 1 if input 1 is active or TC 2 if TC 2 is active. If both input 1 and input 2 are active, input 1 will take precedence and make TC 1 active.