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GETTING STARTED
After power-up the controller requires programming with the following information:
Type of Sensor (See list of temperature sensors p.11)
Operating unit (See list of units p.8)
Allocation of Output Device to SP1/SP2 (Relay or SSd)
Temperature Setpoint
When the above information has been programmed into the controller it will be
operational with the following factory settings.
Proportional band/Gain
Integral time/Reset
Derivative time/Rate
Proportional cycle-time
(Typical setting for relay output)
DAC Derivative approach control
(Average setting for minimum overshoot)
The instruments covered in this manual may be fitted with either a single or a dual
display. Where a single display shows more than one reading, it will alternate
between them.
INITIAL SET-UP
On power-up the controller will display the self test sequence followed by the initial
display inPt : nonE
1
Select input sensor.
Press and hold
and use the
or
until the correct sensor is displayed. Release the buttons. The display will now read
selected sensor type e.g. inPt : tCs
Press
once The display will now read unit : nonE
2
Select unit.
Press and hold
and use the
or
until the correct unit is displayed. Release the buttons. The display will read selected
unit e.g. unit : °C
Press
once The display will now read SP1.d : nonE
4
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10ºC/18ºF
5 mins
25 secs
20 secs
1.5
buttons to scroll through the sensor selection list
buttons to scroll through the unit selection list
3
Select SP1 (Main setpoint output device)
Note: Dual Relay and Dual SSd Output Options Models have their outputs
pre-configured. Move to Step 4.
Press and hold
and use the
or
buttons to select SSd or rLY as required. The
controller will now read selected output device e.g. SP1.d : SSd
4
To enter initial configuration into controller memory
Press and hold both
and
buttons for 3 seconds. The display will now read ParK
and measured variable (temperature) (eg. 23 ) ParK is displayed because a setpoint
has not yet been entered.
To display setpoint
Press and hold
The displays will now read unit (eg. °C ) and 0
To enter setpoint
Press and hold
and use
button to increase or
and scroll to required setpoint value. (The digit roll-over rate increases with time).
THE CONTROLLER IS NOW OPERATIONAL
WITH FACTORY SETTINGS
Note:
For precise control of an application the controller may need to be TUNED.
Please see the following section on AUTOTUNE
AUTOTUNE
This is a single shot procedure to match the controller to the process. Select either Tune or
Tune at Setpoint from the criteria given below.
The Tune program should be used when the load temperature is at or near ambient. The
procedure will apply disturbances when the temperature reaches 75% of the setpoint
value, causing overshoot which is monitored in order to adjust the DAC overshoot inhibit
feature. Care should be taken to ensure that any overshoot is safe for the process.
The Tune at Setpoint program is recommended when:
The process is already at setpoint and control is poor
The setpoint is less than 100°C
Re-tuning after a large setpoint change
Tuning multi-zone and/or heat-cool applications.
Notes:
DAC is not re-adjusted by Tune at setpoint.
Proportional Cycle Time can be pre-selected before running the Autotune
program. (see p5)
button to decrease the reading
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