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温度コントローラー Athena 6200のPDF 取扱説明書をオンラインで閲覧またはダウンロードできます。Athena 6200 16 ページ。 Microprocessor-based temperature controller
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Tuning
Heat Gain
Heat Gain
(HG) Setting
Rate (RT)
Setting
(includes reset)
You have now optimized rate and reset times for the frequency response of
the process. If time permits, finer adjustment can be made. For faster start-up
relays directly connected to small heaters, 0-5 sec., but
not faster than 10 sec. when driving mechanical
contactors. "S" solid state contactor drivers can be
used 0-10 sec. "F" mA output units must be set to
HC = 0, less than 1 sec.
CG Is cooling gain. If no cooling is used, set it to
100, and enter. If cooling is employed, start at CG = 400
and follow procedure to set HG.
The final index position is used to set cooling
cycling (CC) time. On all "T" output units, C = 0. Other
outputs are dictated by the type of cooling method
employed. Mechanical compressors may require
2 minutes, liquid pumps 30 seconds, solenoid valves
5-15 seconds, small fans 5 seconds, large ones 30.
Decide, set and enter (E) to lock in value. Then move
index back to "SP".
Connect power to heater and observe temp. rise. Run
set polnt down to meet process. Heat output will start
proportioning within a few degrees of process
temperature, and cool will proportion once SP is below
process.
An ideal process would glve perfect results with
highest controller gain. Practically speaking however,
heaters are overpowered, have stored heat and poor
coupling, loads have multiple delays, and the sensor
reading lags behind the heating output status. A
controller must be tuneable to process characteristics
in order to compensate for the deficiencies of the rest
of the system. The Model 6000 has been designed so
that it does this and still remains easy to operate.
Fix set polnt (SP) at the desired process
1.
temperature. (If overshoot can not be tolerated
durlng set-up, use 20-30% lower temp.)
Set heat gain (HG) at 400. Record the range of
2.
temperature oscillations around the set point. Note
their durations.
Reduce gain by half (200). Observe and note
3.
osclllatlon (if any).
Repeat this halving procedure until temperature
4.
is stable.
Push (E) to enter. You have now compensated for
5.
heater power and number of lags, but a droop
between set polnt and process exists.
Set rate (RT) to 01 seconds for fast systems, 05 for
1.
slow, 10 seconds for massive.
Observe oscillation building up and record the range.
2.
3.
Double rate time. Observe oscillation.
Repeat the doubling procedure until the process
4.
stabilizes again.
Then enter (E).
5.
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