Ee e – Thermo Fisher Scientific Alpha COND 1000 User Manual

Page 27

Operating Instructions

Thermo Scientific Alpha COND 1000

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 proportional

valves.

- Use control off to operate controller as a monitor only or to prevent 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 ▼ keys 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, 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).

1) Follow directions in 7.4.1 to enter Controller mode.

2) Press the ENTER key. Scroll until the lower display

shows “rEL” and the upper display shows the current
selection (de-energised = dEEN or energised = EN).

3) Press the

▲ or ▼ keys to choose de-energised or

energised relay state.

4) Press the ENTER key to confirm your selection.

5) Continue with Advanced Set-up mode procedures, or

return to Measurement mode by pressing the

▲ and ▼

keys simultaneously (escape).

HOLD

SETUP