Omega CN158 User Manual

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4. Screen instruction

4-1. Power on and initial screen display

After turning on power, the display shows each power on initial
screen for approx. 1.5 seconds, then moves into the basic screen
of the mode 0 screen group.

4-2. Alarm type code table

4-3. Screen change

(1) Screen change from mode 0 group to mode 1 group

• Pressing the key for three seconds on the basic screen

of the mode 0 screen group changes it to the direct call
screen of the mode 1 screen group and vice versa.

(2) Screen change from mode 0 group to mode 2 screen group

• Pressing the key for five seconds on the basic screen

of the mode 0 screen group changes it to the function
selecting screen of the mode 2 screen group and vice versa.

Measured value (PV)
Set value (SV)

Turning

on power

Series type ( )

Input type ( : Thermocouple, : R. T. D.,

Control output type : Contact : SSR drive voltage

: Current : Voltage

Lower limit of the selected measuring range
Higher limit of the selected measuring range

Power on initial screen

: Voltage (mV), : Voltage (V), : Current (mA))

Displays output screen

Mode 0 screen group basic screen

(3) Screen change within mode 0 screen group

• By pressing the key, the screen changes.

(4) Screen change within mode 1 screen group

• Two methods are used for screen change within mode 1

screen group. One is to press the key as shown on
above mode 0 screen group. The other is to mode the
screen directly by indicating screen No. on the top direct
call screen.

Example: Direct calling the screen No.8 PV bias value set

screen

(5) Selecting and setting digit to change of function selecting

screen of mode 2 screen group
• When the function selecting screen is displayed, the point

of selectable digit flashes.

• By pressing key, the selectable digit (digit whose

point is flashing) moves.

• In case of changing the set value, flash the point to be

changed with key, select data with the keys and
press key again to register the set value and move
selectable digit.

Example: changing the control output characteristics from

(heating) to (cooling)

* “.” on the screen shows the selectable digit (digit whose

point is flashing).

(6) Shifting setting items on input scaling screen of mode 2

screen group and setting method
• Pressing the key on the function selecting screen calls

the input scaling screen onto the display. The decimal
point in the rightmost position on the top row flashes.
Press the or key to change the lower limit value
and press the key to register the data.

• Upon registering the lower limit value data, the decimal

point in the rightmost digit in the bottom row begins to
flash. Change the higher limit value by pressing the
or key and register it by means of the key.

• Upon registering the higher limit value data, the decimal

points in the rightmost digits of the bottom and top rows
flash. Change the positions of the decimal points by
pressing the or key and register it by means of the

key.

• Each time the key is pressed, the flashing decimal

point in the rightmost digit moves from the top row

→

bottom row

→top and bottom rows→top row→.

• In case the lower limit value and the higher limit value are

set to produce a difference which is less than 100 counts or
more than 5000 counts, the higher limit value is forced to
change to +100 or +5000 counts. The higher limit cannot
be set to be less than a lower limit value +100 counts or
more than a lower limit value +5000 counts.

Alarm code

0 ( )

1 ( )

2 ( )

3 ( )

4 ( )

5 ( )

6 ( )

7 ( )

8 ( )

AH
assignment

Not assigned

Higher limit
deviation value
Higher limit
absolute value

Not assigned

Lower limit
deviation value
Lower limit
absolute value

Higher limit
deviation value
Higher limit
absolute value

With/Without
inhibit action

Without
inhibit action

With
inhibit action

Without
inhibit action

With
inhibit action

Without
inhibit action

With
inhibit action

– – – – –

With/Without
inhibit action

– – – – –

AL/HB
assignment

Heater break

Note:

In the above table, the alarm codes 5 through 8 are
selectable when the apparatus has the optional function
of heater break alarm.

0-0 Basic Screen

1-0 direct call screen

key

3 seconds

ENT

0-0 Basic Screen

2-0 Function selecting screen

key

5 seconds

ENT

key

ENT

1-0 direct call screen

1-8 PV bias value set screen

several times

point flashes

ENT

key

ENT

key

ENT

key

Note:

In case of changing data and pressing key longer
than 5 seconds, the screen moves to mode 0 basic screen
without a data registration. It requires a data verification
with key and screen change.

ENT