Omega-engineering CN9400 User Manual download pdf (Page 12)

Autotune

The TUNE AT SETPOINT program will now start. The upper display

will alternate

tune

and the process temperature.

The lower display will read the setpoint value.

Note: During tuning the main setpoint (SP1) LED will flash.

When the TUNE AT SETPOINT program is complete the upper

alternating display stops and only the process temperature is

displayed. The PID values are entered automatically. The

process temperature will rise to setpoint and control should

be stable. If not, this may be because optimum cycle time

is not automatically implemented. To set the cycle time see

PROPORTIONAL CYCLE-TIME.

When the TUNE program is complete the upper alternating

display stops and only the process temperature is displayed. The PID

values are entered automatically. The process temperature will rise

to setpoint and control should be stable. If not, this may be

because optimum cycle time is not automatically implemented. To

set the cycle time see PROPORTIONAL CYCLE-TIME.

TUNE AT SETPOINT PROGRAM

Enter program mode and select

And from the display select

Exit program mode.

Temp

Setpoint

Start

TUNE

Tuning

PID

/4 on/off tuning

cycles

New PID

values

entered

Time

(100% output)

AT.SP

Overshoot

during tuning

Prop band

REMINDER OF INSTRUMENT ADJUSTMENTS

Press ▲ ▼ together for 3 seconds for program entry or exit.

Press ▲ or ▼ to scroll through functions.

Press ✱ ▲ together or ✱ ▼ together to change levels or alter

options.

Note: If in difficulty by becoming “lost” in program mode,

press ▲ and ▼ together for 3 seconds to return

to display mode, check the Menu Navigation

summary above and try again.

TUNE

OFF

TUNE

AT.SP

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Omega-engineering CN9400 User Manual Page 12

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