ATI Q46D Dissolved Oxygen System Part 6 - Configuration
34
O&M Manual
Rev-N (4/21)
The FAIL setting enables the fail alarm mode for Relay A. Relay A will
then trip on any condition that causes the FAIL icon to be displayed on
the LCD. Using this mode allows the User to send alarm indications to
other remote devices.
The AL setting allows two setpoints to be selected for the same relay,
producing a HI-LO alarm band. In this mode, Relay A will trip inside or
outside of the band, depending upon the Phase selected. See Figure 22
- Alarm Relay Example for further details.
*Relay B Mode The settings for Relay B Mode are identical to the corresponding modes
on Relay A.
Relay C Mode Relay C can be used in two ways: as a setpoint control, or as an alarm.
The two settings for Relay C Mode are CON and FAIL.
The CON setting enables normal setpoint operation for Relay B/C.
Relay B/C then operates identically to Relay A, with settings for setpoint,
hysteresis, delay and phasing appearing in the CONFIG menu
automatically. See Figure 21 for details.
The FAIL setting enables the fail alarm mode for Relay B/C. Relay B/C
will then trip on any condition that causes the FAIL icon to be displayed
on the LCD. Note that the Relay C indicator shows up only on the lower
screen of the display next to the temperature reading. This is because
the default setting for relay C is the FAIL setting. Using this mode allows
the User to send alarm indications to other remote devices. See Figure
22 for details.
*Relay D Mode OPTIONAL Relays D, E, and F can be used in two ways: as a setpoint
*Relay E Mode control, or as an alarm. The two settings for Relays D, E and F Mode
*Relay F Mode are CON and FAIL.
The CON setting enables normal setpoint operation for Relays. Relays
then operates identically to Relay A. B or C, with settings for setpoint,
hysteresis, delay and phasing appearing in the CONFIG menu
automatically. See Figure 21 for details.
Temp Units This function sets the display units for temperature measurement. Press
ENTER to initiate user entry mode, and the entire value will flash. Use
the UP arrow key to modify the desired display value. The choices are
°F and °C. Press ENTER to store the new value.
6.25 Control Menu [CONTROL]
The Control Menu contains all of the output control user settings. Note that PID menu items will
not appear unless output 1 is configured for PID mode in the CONFIG menu.
Set PID 0% If the PID is enabled, this function sets the minimum and maximum
Set PID 100% controller end points. Unlike the standard 4-20 mA output, the
[Iout1=PID] controller does not “scale” output values across the endpoints. Rather,
the endpoints determine where the controller would normally force
minimum or maximum output in an attempt to recover the setpoint (even
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