Ph - outputs menu - alarm relay 4.20 – Aquametrix SHARK-120/240 Controllers User Manual User Manual

Page 43

MULTI-PARAMETER CONTROLLER & ANALYZER USER’S MANUAL

pH - Outputs Menu - Alarm Relay 4.20

pH - Outputs Menu - Alarm Relay 4.20

Page 41

DOWN

TO HIGH OFF

NOTE

PRESS THE AND KEYS

TOGETHER TO GO IMMEDIATELY BACK TO

RUN MODE

DOWN

Use the and
keys to change the setting

Press the key to accept the
setting and move to the next setting

Use the and
keys to change the setting

Press the key to accept the
setting and move to the next setting

If you wish to change the setting,
press the key once which will move the cursor
to the first character of the value to be changed

The ALARM RELAY will respond to both a rising and falling
process. The ALARM RELAY will act as a low alarm (falling
process) and a high alarm (rising process). Both relay bands will
have independently adjustable on and off set-points. If a low
alarm set-point is set at a value 3.00pH for example, the off set-
point must be set higher. The controller will not let the user input
a value below 3.00pH. The same rule holds true for the high
alarm.

The Alarm Relay can be configured for the following operations
-LOW ON Set-point
-LOW OFF Set-point
-HIGH ON Set-point
-HIGH OFF Set-point
-Failsafe

The HIGH ON set-point is the high
process value that will cause the relay to
energize. This value can be set anywhere
0-100% of Full Scale.

The LOW ON set point is the low process
value that will cause the relay to energize.
This value can be set anywhere 0-100%
of Full Scale.

The LOW OFF set point is the value that
the process must reach in order to de-
energize the alarm relay after it has
dropped below and tripped the LOW ON
set-point. This value must be higher than
the LOW ON Set-point.

RUN MODE

Press the key once
which will move the cursor back
to the RH side of the display.

Press the key once
which will move the cursor
back to the RH side of the
display.

HIGH ON 13.2 0

ALARM RELAY
HIGH ON 10.50

HIGH ON 13.2 0

HIGH ON 10.5 0

ALARM RELAY

LOW OFF 3.00

LOW OFF 3.0 0

ALARM RELAY

LOW OFF 4.20

ALARM RELAY

ALARM RELAY
LOW ON 3.50

ALARM RELAY

LOW OFF 4.2 0

ALARM RELAY

LOW ON 2.0 0

ALARM RELAY

LOW ON 2.0 0

LOW ON 3.5 0

OUTPUTS

UTILITIES

DIAGNOSTICS

CALIBRATION

SETUP

7.15pH 25.0C

ALARM RELAY

RELAY A

RELAY B