Thermo Fisher Scientific Alpha COND 2000 (In the process of updating the brand guideline & product image) - Manual (Page 31)

Instruction Manual
αlpha CON 2000
25
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.