alpha-pH 1000
18
7.4
Controller (Cntr) sub-function
You can set the controller’s parameters in this sub-function.
7.4.1
Entering the Controller sub-function
1)
Enter Advanced Set-up mode. Push the ENTER key and scroll to Advanced set-up security code
“22”. Push the ENTER key again.
2)
Press the
!
or
"
key to scroll until the upper display shows “Cntr”.
7.4.2
Choosing the controller type (limit or proportional)
This mode lets you choose your controller type: limit control, pulse length proportional control, pulse
frequency proportional control, or control off.
-
Use limit control with pumps or values for fast response.
-
Use pulse frequency proportional control to operate your pumps smoothly.
-
Use pulse length proportional control for precise control of proportioning valves.
-
Use control off to operate controller as a monitor only or to keep relays from switching.
1)
Follow directions in 7.4.1 to enter Controller mode.
2)
Press the ENTER key. The upper display shows the current controller type and the lower display
shows “tyP”.
3)
Press the
!
or
"
key to select your controller type.
-
L.Ct = limit value pickup (on/off control).
-
oFF = controller off.
-
PLC = pulse length control.
-
PFC = pulse frequency control.
4)
Press the ENTER key to confirm your selection.
5)
Proceed to 7.4.3 step 3, or return to Measurement mode by pressing the
!
and
"
keys
simultaneously (escape).
7.4.3
Choosing break/make contact relay type
Note: If the controller type “oFF” is set, the parameters listed in 7.4.3, 7.4.4 and 7.4.5 are blanked out.
This mode lets you determine the relay state under Non-Alarm condition – dEEN (de-energised) or EN
(energised).
Cntr
SETUP
HOLD
L.Ct
tyP
SETUP
HOLD
oFF
tyP
SETUP
HOLD
PLC
tyP
SETUP
HOLD
PFC
tyP
SETUP
HOLD