Controller / User Interface | 4-27
Low Limit
Select this to enable an analyte concentration Low Limit Alarm.
High Limit
Select this to enable an analyte concentration High Limit Alarm.
Heartbeat
Relay periodically will turn on and off to indicate that the Ana-
lyzer is “ON”.
Check Request
Relay will be “ON” if any warnings are active.
User
Relay action controlled by analyzer internal task.
Relay 1–8 Source
Defines the assignment for each of the eight relay outputs, which are
displayed on the right side of the screen. This parameter only applies
if Relay Function is set to Low Limit or High Limit. Options include:
NONE
Select NONE if you do not wish to assign a relay to an output
channel.
Analyte 1–8
Defines the analyte (species) of interest for the relay output.
You can assign a different relay for each channel. To assign a relay
to a channel, select an analyte and press ENTER. Note that the
actual species name (e.g., SO
2
) will be displayed on the screen, not
“Analyte.”
Relay 1–8 Value
Defines the Low or High Alarm Limit threshold for each relay (user
input required). This parameter only applies if Relay Function is set to
Low Limit or High Limit.
Relay 1–8 Delay
Defines the delay time to de-energize the relay after the analyte con-
centration goes outside the limit set with Relay Value.
For example, if Relay Delay is set to 5 seconds, the analyte concentra-
tion can exceed the High Limit for up to 5 seconds at a time without
de-energizing the relay. If the concentration stays high for more than
5 seconds, the relay will be de-energized. The range is 0–3600 seconds.
This parameter only applies if Relay Function is set to Low Limit or
High Limit.
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