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温度コントローラー Athena 4000 SeriesのPDF 操作マニュアルをオンラインで閲覧またはダウンロードできます。Athena 4000 Series 16 ページ。 Temperature/process controller
Configuring
There is a switch assembly on the bottom board (see bottom board illustration). This four-position switch
Output Function
regulates cycle time and output selection. It is factory-configured for the plug- in output ordered. Check the
Switches
output function chart to make sure the configuration is correct for your application.
Switches 1&2:
NOTE: Switch 4
changes the cycle
times in conjunction
Switch 3:
with switches 1 and 2.
Check output function
switch chart.
Switch 4:
Proportional
The proportional band adjustment widens or narrows the band over which proportional action occurs. Too
Band
narrow a band can cause the temperature to swing about the setpoint. This can be seen on the deviation
meter. Too wide a band can cause an error between the setpoint and the actual temperature (droop error) as
Adjustments
measured at the sensor.
For All Outputs
Proper setting of this adjustment is the point where the temperature swings just stop. When adjusting the
proportional band control, do so in small increments, allowing time between each adjustment for the process
to stabilize.
Turning the adjustment in a clockwise direction widens the proportional band and should reduce swings to
straight line control with most processes.
Offset
After the proportional band is set, the process temperature may stabilize at a point other than the setpoint,
(Manual Reset)
high or low, as shown on the display. This can be corrected with the offset (manual reset) adjustment.
Adjustment
If the deviation meter indicates a low temperature, turn the offset (manual reset) adjustment clockwise (+
direction) until the display is correct.
Turn the offset (manual reset) adjustment counter-clockwise (- direction) for high temperature as indicated by
the display.
For applications requiring multiple setpoints over wide temperature spans, some automatic droop
compensation can be achieved by cutting jumper "A" (See bottom board diagram for location, Figure 5).
NOTE: If close control cannot be obtained after carefully repeating the above procedures, check to see if the
thermocouple probe is in good contact with the heated process, and if the heaters are correctly sized for the application.
Applications involving large changes in setpoint operating temperature, or large load changes, will require readjustment of
the proportional band and offset (manual reset) pots
Deadband
Adjustments
An adjustable 0 to 5 degree deadband can be accessed by setting switch #3 to off and cutting the jumper
next to the manual reset pot.(See Figure 5.) The band can be adjusted using the proportional band
adjustment.
These switches act together to select either proportional current output or one of the time
proportioning cycle times. (See the output function switch chart.) Use longest times to get
best relay life expectancy. If meter shows temperature swings following each "on" cycle,
select a faster time to reduce "ripple."
Selects either on/off or proportional action. "On" provides proportional action. "Off"
provides on/off action.
Selects output for either mechanical or solid state relays.
Provides slow proportional times for mechanical relays
On:
Provides 20 mAdc when used with the "F" module or fast time proportioning
Off:
times when used with "S" or "T" modules
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