Omega Engineering CN9400 Manual De Usuario

Temp

Setpoint

Cycle

75% SP

Start

TUNE

TUNE

Tuning

DAC

PID

New PID
values
entered

Time

(100% output)

oS 1

oS 2

Ct A

Ct b

Ct 3

Ct 4

uS

Ct 1

Ct 2

Upper display alternates: 

and 

Indicates:   thermocouple burnout RTD/Pt100 open or 

short circuit or negative over-range.

Action:  

Check sensor/wiring

Upper display alternates: 

and 

Action:  

De-power briefly. Replace unit if problem 

persists

Upper display alternates: 

and 

SP1 set to ON/OFF in 

Action:      Select proportional mode

Upper display alternates: 

and 

Lower display 0

1. No setpoint entered. 

Action:      Enter setpoint

2. SP1 set to ON/OFF in

Action:      Select proportional mode

Note:

To reset and clear error press ▲▼ together 
briefly to cancel message.

The thermal characteristics of the load exceed the 

Autotune algorithm limits. The failure point indicated 

by any display 0.0 in

e.g. Ctb = 0.0 see adjacent diagram.

Action:

1.

Change the conditions. eg. raise setpoint

2.

Try

3.  Check SP1.P percentage power 

(see IMPROVING CONTROL ACCURACY)

4.  If the error message persists, call CAL 

for advice.

1. Index to

release ▲ or ▼, lower display will alternate 

and value

2. Keep ✱ pressed and press ▲ once, the lower 

display will alternate 

and value (eg. 19.6) 

3. Repeat step 3 above to view:

and

.

INPT

DATA

HAND

FAIL

0

CYC.T

ON.OF

TECH

TUNE

AT.SP

TECH

CT.A