Flow - outputs menu - alarm relay 7.17 – Metex Shark Multi-Parameter Controllers & Analyzers User Manual

Page 128

MULTI-PARAMETER CONTROLLER & ANALYZER USER’S MANUAL

Flow - Outputs Menu - Alarm Relay 7.17

Flow - Outputs Menu - Alarm Relay 7.17

Page 126

DOWN

With "N" selected, pressing the
key will NOT store the selection, but
simply return to the OUTPUTS Menu.
This function is useful if you wish to
view the current selection without
making any changes.

DOWN

TO OUTPUTS MENU

Not stored

DOWN

Then press the key to store the
selection and return to the OUTPUTS menu

Stored

the Y character.

Or press the key to highlight

The FAIL SAFE feature is designed to reverse the
normal action of the relay.
When set to FAIL SAFE OFF, the relay will operate
as a normal relay, which means that when the
relay is not energized the NO contacts are open,
and a device connected via the NO contacts is
turned off. When the relay becomes energized the
device turns on.
When the relay is set to FAIL SAFE ON, the
normal action of the relay is reversed. Thus the NO
contact acts as the NC contacts and the NC acts
as the NO. Therefore the device connected to the
NC contacts will be turned on when the relay on
set-point is reached. Actually the relay will be de-
energized but because it is acting in reverse the
device will be turned on. When the relay off set-
point is reached the relay will energize and the
device connected to the NC contact will turn off.
The reason that the Fail Safe option would be used
is to have the device turned on in the event of a
power interruption.

The HIGH OFF set- point is the value that the
must reach in order to de-energize the alarm relay
after it has increased over and tripped the HIGH
ON set-point. This value must be lower than the
HIGH ON Set-point.

FROM HIGH ON

NOTE

PRESS THE AND KEYS

TOGETHER TO GO IMMEDIATELY BACK TO

RUN MODE

DOWN

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

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

Use the and
keys to change the setting

DOWN

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

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

DOWN

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

Use the and
keys to change the setting

DOWN

If the Low On set-point is set higher than the factory
default Low Off set-point, when the user advances
from the low on set-point to the Low Off set-point the
controller will adjust the Low Off set-point to be equal to
the Low On set-point. If the user then tries to decrease
the Low Off set-point the Controller will display the Low
Alarm setup error screen.

This screen will be displayed for 10 seconds, then return
back to the setup screen that was previously displayed.
The same conditions apply to the High alarm set-points.
Except the High Off set-point must be lower than the High
On set-point. If the user tries to increase the High Off set-
point higher than the High On set-point the High Alarm
setup error screen will be displayed.

If the user sets the low on set-point and the low off set-
point equal to 0, it will disable the Low Alarm relay.
Similarly, setting the High On set-point and the HIGH
OFF set-point to 0 will disable the High Alarm.

ON SPT < OFF SPT

LOW ALARM

ON SPT > OFF SPT

HIGH ALARM

STORE? Y N

ALARM RELAY

FAIL SAFE ON >

FAIL SAFE O N >

FAIL SAFE O FF >

HIGH OFF 88.00 >

HIGH OFF 88.0 0 >

HIGH OFF 70.0 0 >

ALARM RELAY

FAIL SAFE OFF >

ALARM RELAY

HIGH OFF 70.00 >