ATI Technologies Q46 Series User Manual

ATI Q46D Dissolved Oxygen System Part 6 - Configuration
37
O&M Manual
Rev-N (4/21)
indicator illuminates when the oxygen level drops below the setpoint.
The failsafe setting does have an impact on this logic. The description
here assumes the failsafe setting is OFF. Press ENTER to initiate user
entry mode, and the entire value will flash. Use the UP arrow key to
modify the desired value; selections include HI for direct operation or LO
for reverse operation. Press ENTER to store the new value.
See Figure 21 below for a visual description of a typical control relay
application.
Figure 21 - Control Relay Example, Hysteresis & Phase Options
If Relay A Mode is set to Alarm Mode, AL, then the following settings will appear
in the Config Menu list automatically. In this mode, two setpoints can be selected
on the same relay, to create an alarm band. Phase HI selection causes the relay
to energize outside of the band, and Phase LO causes the relay to energize
inside of the band. This feature enables one relay to be used as a control relay
while the other is used as a HI-LO Alarm relay at the same time. Setpoint A-LO
must be set lower than Setpoint A-HI. When AL mode is first selected, Setpoint
A-LO is defaulted to 0.
Figure 22 is a visual description of a typical alarm relay application.
Setpoint: 1.000 ppm
Hyst: 0.050
Delay: 000
Failsafe: OFF
When value rises to ≥ 1.000 ppm, relay closes.
When value falls to ≤ 0.950 ppm, relay opens.
When value rises to ≥ 1.050 ppm, relay opens.
When value falls to ≤ 1.000 ppm, relay closes.
Settings:
}
1.000 ppm
0.950 ppm
PHASE: HI
ON
HYSTERESIS
OR
“DEAD BAND”
X
OFF
}
1.050 ppm
1.000 ppm
PHASE: LO
OFF
HYSTERESIS
OR
“DEAD BAND”
X
ON
When value rises to ≥ 1.000 ppm, relay
closes, until value falls back to < 0.950 ppm.
}
}
1.000 ppm
0.950 ppm
0.550 ppm
0.500 ppm
PHASE: HI
ON
HYST - HI
HYST - LO
ON
X
X
OFF
}
}
1.050 ppm
1.000 ppm
0.500 ppm
0.450 ppm
PHASE: LO
OFF
HYST - HI
HYST - LO
OFF
X
X
ON
When value falls to < 0.500 ppm, relay
closes, until rises back to > 0.550 ppm.
When value rises to ≥ 0.500 ppm, relay
closes, until value falls back to < 0.450 ppm.
When value falls to < 1.000 ppm, relay
closes, until rises back to > 1.050 ppm.
*Setpnt A-HI
*Hyst A-HI
*Delay A-HI
*Setpnt A-LO
*Hyst A-LO
*Delay A-LO

ATI Technologies Q46 Series Specifications

General

Brand	ATI Technologies
Model	Q46 Series
Category	Measuring Instruments
Language	English