Ph - outputs menu - relay a 4.18 – Aquametrix SHARK-120/240 Controllers User Manual User Manual

Page 39

MULTI-PARAMETER CONTROLLER & ANALYZER USER’S MANUAL

pH - Outputs Menu - Relay A 4.18

pH - Outputs Menu - Relay A 4.18

Page 37

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

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

Relay A can be configured for the following operations
- Response to rising or falling process values
- Adjustable on and off set-points
- Cycle on and off times
- Failsafe operation

TO CYCLE ON

The relay can be set to control either a
RISING or FALLING process.

In a FALLING process, the control relay
will energize when the process falls
below a set value. In this case, the ON
set-point must be set lower than the
OFF set-point.

In a RISING process, the control relay
will energize when the process rises
above a set value. In this case, the ON
set-point must be set higher than the
OFF set-point.

The RELAY OFF setting is the process
value at which the relay will de-energize.
The setting must be rationalized against
the On setting. For example, in a falling
process, the Off setting must be higher
than the ON setting.

The controller will not allow you to select
the RELAY OFF value on the wrong side
of the RELAY ON value for the selected
direction. If the user tries to set the
RELAY OFF on the wrong side, the
following errors will de displayed:

Error when trying to set OFF point lower
than ON point when set to falling.

Error when trying to set OFF point higher
than ON point when set to rising.

The RELAY ON setting is the process
value at which the relay will energize. It
may be set anywhere between 0-100%
of the range.

RUN MODE

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

Use the and
keys to change the setting

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.

Use the and
keys to change the setting

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.

RELAY OFF 5.6 0 >

RELAY OFF 4.5 0 >

RELAY ON 4.2 0 >

RELAY ON 4.0 0 >

DIRECTION FALL >

DIRECTION F ALL >

RELAY OFF 4.50 >

RELAY ON 4.00 >

DIRECTION R ISE >

RELAY A

RELAY OFF 5.60 >

RELAY A

ON SPT < OFF SPT

FALLING PROCESS

ON SPT > OFF SPT

RISING PROCESS

RELAY A

RELAY ON 4.20 >

RELAY A

7.15pH 25.0C

CALIBRATION

OUTPUTS

UTILITIES

DIAGNOSTICS

SETUP

DIRECTION FALL >

RELAY A