Orp - outputs menu - alarm relay 5.19 – Aquametrix SHARK-120/240 Controllers User Manual User Manual

Page 73

MULTI-PARAMETER CONTROLLER & ANALYZER USER’S MANUAL

ORP - Outputs Menu - Alarm Relay 5.19

ORP - Outputs Menu - Alarm Relay 5.19

Page 71

TO OUTPUTS MENU

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.

Not stored

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

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

Stored

Use the and
keys to change the setting

NOTE

PRESS THE AND KEYS

TOGETHER TO GO IMMEDIATELY BACK TO

RUN MODE

DOWN

the Y character.

Or press the key to highlight

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 to accept the
setting and move to the next
setting

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

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

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

Use the and
keys to change the setting

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

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

FAILSAFE OFF >

HIGH OFF 700 >

ALARM RELAY

FAIL SAFE ON >

FAIL SAFE O N >

ALARM RELAY

FAIL SAFE O FF >

HIGH OFF 850 >

HIGH OFF 85 0 >

HIGH OFF 70 0 >

ALARM RELAY