Improving Control Accuracy; Using Chek Accuracy Monitor - CAL Controls 3300 Operating Manual

The following functions are to assist engineers with
machine development, commissioning and troubleshooting.
READ SP1 OUTPUT PERCENTAGE POWER
SP1.P
Poor control may be due to incorrectly sized heaters.
(Level 2) constantly displays the output
SP1.P
percentage power applied, which at normal setpoint should
ideally be within 20 - 80% to achieve stable control.
CONTROL ACCURACY MONITOR
CHEK
This measures the control stability, to within 0.1 °C/°F.
The monitor is started using
variance (deviation), maximum and minimum temperatures
are displayed and constantly updated in
Temp
Variance
Maximum
hi°
(Level 3) and the
CHEK
READ
±0.1°
VAr°
Lo°
Minimum
Time

IMPROVING CONTROL ACCURACY

Using the
CHEK
To start the monitor select
Note: During monitoring either return to normal operation
or remain in program mode.
To view monitor readings: index to
The display will alternate between
Press and hold , the display will alternate between Var°
and the variance displayed in degrees (e.g. 0.6)
Press and hold and press
alternate between VAr° and the maximum hi° displayed
in degrees (e.g. 320.3)
Press and hold and press
alternate between VAr° and the minimum Lo° displayed
in degrees (e.g. 319.7)
oFF stops monitor retaining readings
CHEK
on resets readings.
CHEK
On de-powering
CHEK
is zeroed.
Control accuracy monitor
on
CHEK
READ
and Var°
READ
once, the display will
once, the display will
resets to oFF and
READ
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