Thermo Fisher Scientific Alpha pH 1000 - Manual (Page 23)

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7.4 Controller (Cntr) sub-function
You can set the controller’s parameters in this sub-function.
7.4.1
Entering Controller sub-function
1) Enter Advanced Set-up mode. Press the ENTER key and scroll to Advanced set-up
security code “22”. Press the ENTER key again.
2) Press the
▲ or ▼ key to scroll until upper display shows “Cntr”.
7.4.2
Choosing the controller type (limit or proprotional)
This mode lets you choose your controller type: limit control, pulse length 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).
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
Plc
SETUP
HOLD
Pfc
SETUP
HOLD