Thermo Fisher Scientific Alpha COND 2000 (In the process of updating the brand guideline & product image) User Manual

Page 31

Instruction Manual

αlpha CON 2000

1. Select the “CNTR” sub-function, and then press the ENT key.
2. Selecting the controller type (TYP): Press the ▲ or ▼ key to select the suitable controller type:

− OFF = controller off

Use control Off to operate controller as a monitor only or to prevent relays from
switching. When the controller is set to OFF, all the LEDs will be switch off in the

Measurement mode.

− L.CT = limit value control (on/off control).

Use limit control with pumps or valves for fast response

− P/PI = proportional/integral control

Use proportional control to operate your pumps smoothly or for precise control of

proportioning valves. Use PI controller to eliminate steady state error.

Note: please refer to Appendix 4 for detailed information on controller settings.

Press the ENT key to confirm your selection.

− If the controller is set to limit value control (L.CT):

3. Selecting the relay status under Non-Alarm condition (REL): Press the ▲ or ▼ key

to choose the desired relay status (de-energised = “DEEN” or energised = “EN”). Press the
ENT key to confirm your selection.

− If the controller is set to proportional control (P/PI):

4. Selecting the proportional controller type (TYP): Press the ▲ or ▼ key to select the

suitable controller type (“PLC” = pulse length control, “PFC” = pulse frequency control).

Press the ENT key to confirm your selection.

− If the proportional controller type is set to pulse length control (PLC):

6. Selecting the relay status under Non-Alarm condition (REL): Press the ▲ or ▼ key

to choose the desired relay status (de-energised = “DEEN” or energised = “EN”). Press the
ENT key to confirm your selection.

7. Setting the proportional range (PRP): Press the ▲ or ▼ key to set the proportional

range (setting range: 10 to 500%). Press the ENT key to confirm your setting.

8. Setting the pulse length (T.PL): Press the ▲ or ▼ key to set the pulse length (setting

range: 0.5 to 20 seconds). Press the ENT key to confirm your setting.

9. Setting the integral action time (IAT)): Press the ▲ or ▼ key to set the integral action

time (setting range: 0.0 to 999.9 minutes). Press the ENT key to confirm your setting.