3
Heat or Cool
P
ower
Uni-directional Control
Bi-directional Control
H
eat Power
C
ool Power
Figure 2.1
POWER-UP
Upon power-up, all displays and indicators are lit on for approximately 3 seconds. This is followed by the indication of the
controller model name
on the Upper Readout and the firmware version (e.g.
) on the Lower Readout, for
approximately 1 second.
MAIN DISPLAY MODE
After the Power-up display sequence, the Upper Readout starts showing the measured PV
(Process Value) and the Lower
Readout displays the Setpoint Value.
This is the MAIN Display Mode that shall be used most often.
% Output Power Indication
In PID control mode, the Lower Readout can be toggled using ENTER key to indicate either % output power or setpoint value
(SP). The output power is indicated with the left most digit showing ‘P’, ‘H’ or ‘C’ depending upon uni-directional (Heat or Cool)
or bi-directional (Heat and Cool) control mode. Refer Figure 2.1 below.
Tune Mode Indication
(PID Control)
The Lower Readout flashes while the controller is Tuning. Do not disturb the process or alter any parameter values
while Tuning is in progress. The “Tune” message automatically disappears upon completion of Tuning procedure.
Profile Mode Indications
(Applicable if controller is supplied with Ramp / Soak Profile option)
While a Profile Cycle is in progress, the front panel indicator ‘MODE’ flashes or glows steady with Green color. The steady
glowing indicates that though the profile is active, it is currently in HOLD state. Also, the Lower Readout shows the Profile
Setpoint instead of the control setpoint (SP). The % Output Power (if PID Control) can be viewed by toggling the Lower
Readout using ENTER key.
The Lower Readout also facilitates viewing the information about the current profile segment viz.; the Segment Number,
Segment Type (ramp / soak) and the Target Set-point (if current segment is ramp) or the Balance Time (if current segment is
soak).
BASIC OPERATION
Adjusting SP (Control Setpoint)
If permitted at Supervisory Level, the SP value can be directly adjusted on the Lower Readout in the MAIN Display Mode.
While the Lower Readout shows the control setpoint, step through the following sequence for adjusting the SP value :
1. Press and release UP or DOWN key once. The Lower Readout starts flashing.
2. Use UP/ DOWN keys to adjust the SP value.
3. Press and release ENTER key. The Lower Readout stops flashing and the new set value is registered and stored.
User Manual
neuro 102 Plus
Section 2
