ATI Q46D Dissolved Oxygen System Part 6 - Configuration
41
O&M Manual
Rev-N (4/21)
Fail Val #1 Sets the output failure value for Iout#1. When Fail Out above is set to
ON, this function sets value of the current loop under a FAIL condition.
When the Relay Option Board is installed, the display will read Fail Out
#1. The output may be forced to any current value between 4-20 mA.
Press ENTER to initiate user entry mode, and the entire value will flash.
Use the UP arrow key to modify desired value; selections are between
4mA, and 20mA. Press ENTER to store the new value.
Fail Out #2 This function sets the fail-mode of current loop output #2 under a FAIL
condition. The settings and operation are identical to Fail Out for output
#1.
Fail Val #2 This function sets the value of current loop output #2 under a FAIL
condition. The settings and operation are identical to Fail Out for output
#1.
*Fail Out #3 OPTIONAL. This function sets the fail-mode of current loop output #3
under a FAIL condition. The settings and operation are identical to Fail
Out for output #1.
*Fail Val #3 OPTIONAL. This function sets the value of current loop output #3 under
a FAIL condition. The settings and operation are identical to Fail Out for
output #1.
Backlight This function has three options. ON – On all the time, OFF – Off all the
time, AL – Alarm (Default). This function flashes the backlight on and off
whenever the Fail icon is displayed.
Start Delay This function is designed to minimize control or alarm issues arising from
temporary power loss. When power goes down, the monitor records the
analog output values and the status of relays and PID functions. When
power is restored, the analog values and relays will be held at the pre-
power loss values for a defined period of time. This “start delay” may be
programmed for periods from 0-9.9 minutes. This function is set to 0.0
minutes by default and must be activated by the user if desired by setting
a positive time value.
Cal Check This feature can be enabled to run at the completion of every autoclean
cycle to check sensor operation. When enabled, this feature uses the
autocleaner enclosure to blast air past the sensor face, while
submerged, for a fixed amount of time. During that time, the sensor
saturation reading is checked to see if it is within certain limits (75%-
125%). If the reading comes back within range, the autoclean cycle
completes as normal. If the reading is out of range, a FAIL diagnostic
flag will be tripped and the FAIL relay (if set) can be used to indicate a
failure. NOTE – This feature may not work under all circumstances and
must be evaluated for your specific application. Very high flow fluid rates
may displace the forced air stream, and a good saturation reading may
be difficult to obtain.
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