Omega CN616TC1 User Manual page 5

PID
All zones set for PID use the same PID parameters i.e.:- Proportional
band, Reset and Rate. These are derived from autotuning or manual
setting. To achieve closest control the slowest zone should be chosen
for the autotuning. If control is not optimal manual adjustment may be
advisable.
On Off
On-off control is available for zones not set for PID control. All zones
under on-off control are subject to the same hysteresis setting.
Profiling
The CN616 allows the process to be controlled under a precise time/
temperature profile.
The Profile of each zone can be set within 20 segments.
Each segment consists of 3 parameters
1. Setpoint in °C or °F
2. Slope in °C / min. or °F / min.
3. Time in hours
Note ! Slope always takes precedence over the time. That means that
if slope is set then time will be ignored. To activate time slope must be
set to (0). When slope is set to (0) time is used to calculate the slope for
ramp. This way finer slope setting is possible.
Warning! In Soak application slope must be set to (0), otherwise time
will be ignored and soak will not occur.
Example of setting Profile Segments
Segment 1
Setpoint 0 2 0 0
0 4.0
Slope
0 0. 0 0
Time
Starting from the current
temperature go to 200
deg at 4 deg /minute
5
Segment 2
Segment 3
0 2 0 0
0 4 0 0
0 0.0 0 8.0
0 1. 0 0
0 0. 0 0
Climb to 400 deg at
Soak at 200 deg for
a rate of 8 deg per
1 hour
minute
To start setting a Profile, the main display shows the setpoint with
the first digit (MS) flashing. Set digits with the
scroll through the display with the
through 4 digits the display will change to slope. The slope has only
3 digits, after scrolling through slope main display will show 4 digit
time, and after time setpoint again. To distinguish between setpoint
slope and time setpoint has 4 full digits, slope has 3 digits with
decimal point after second digit, and time has 4 digits with a
decimal point after second digit. When all parameters are set save
data with the
button. Saving data will advance display to the next segment.
Autotune zone1 Run zones 1, 2, 3 & 4
700
600
500
400
300
200
100
0
1 301
6
button. Then
button. After scrolling
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