Omega C9000A User Manual

omega.com

e-mail: [e-mail]

For latest product manuals:

omegamanual.info

C9000A SERIES

Autotune Temperature Controller

Shop online at

®

User’s Guide

Servicing North America:

USA: One Omega Drive, P.O. Box 4047

ISO 9001 Cer

tified Stamford CT 06907-0047

TEL: [phone] FAX: [phone]
e-mail: [e-mail]

Canada: 976 Bergar

Laval (Quebec) H7L 5A1, Canada
TEL: [phone] FAX: [phone]
e-mail: [e-mail]

For immediate technical or application assistance:

USA and Canada: Sales Service: 1-800-826-6342 / 1-800-TC-OMEGA

®

Customer Service: 1-800-622-2378 / 1-800-622-BEST

®

Engineering Service: 1-800-872-9436 / 1-800-USA-WHEN

®

TELEX: 996404 EASYLINK: 62968934 CABLE: OMEGA

Mexico: En Espan˜ol: [phone]-7803 e-mail: [e-mail]

FAX: [phone] [e-mail]

Servicing Europe:

Benelux: Postbus 8034, 1180 LAAmstelveen, The Netherlands

TEL: [phone] FAX: [phone]
Toll Free in Benelux: 0800 0993344
e-mail: [e-mail]

Czech Republic: Frystatska 184, 733 01 Karviná, Czech Republic

TEL: [phone] FAX: [phone]
Toll Free: 0800-1-66342 e-mail: [e-mail]

France: 11, rue Jacques Cartier, 78280 Guyancourt, France

TEL: [phone] FAX: [phone]
Toll Free in France: 0800 466 342
e-mail: [e-mail]

Germany/Austria: Daimlerstrasse 26, D-75392 Deckenpfronn, Germany

TEL: [phone] FAX: [phone]
Toll Free in Germany: 0800 639 7678
e-mail: [e-mail]

United Kingdom: One Omega Drive, River Bend Technology Centre

ISO 9002 Cer

tified Northbank, Irlam, Manchester

M44 5BD United Kingdom
TEL: [phone] FAX: [phone]
Toll Free in United Kingdom: 0800-488-488

e-mail: [e-mail]

It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that apply. OMEGA is
constantly pursuing certification of its products to the European New Approach Directives. OMEGA will add the CE
mark to every appropriate device upon certification.

The information contained in this document is believed to be correct, but OMEGA Engineering, Inc. accepts no
liability for any errors it contains, and reserves the right to alter specifications without notice. WARNING: These
products are not designed for use in, and should not be used for, human applications.

OMEGAnet®Online Service Internet e-mail

www.omega.com [e-mail]

i

TABLE OF CONTENTS

CN9000A SERIES

MINIATURE AUTOTUNE TEMPERATURE

CONTROLLER

SECTION

SECTION 1 INTRODUCTION..............................

1.1 General Description......................................

1.2 Available Models..........................................

SECTION 2 INSTALLATION...............................

2.1 Unpacking.....................................................

2.2 Cautions and Mounting Instructions.............

2.3 Wiring...........................................................

2.4 Typical Wiring Diagrams...............................

SECTION 3 OPERATION......................................

3.1 General Considerations................................

3.2 Controls and Indicators................................

3.3 Default (Pre-Set) Settings............................

3.4 Getting Started.............................................

3.4.1 Selecting Sensor and Adjusting Setpoint.....

3.4.2 Changing the Allowable Setpoint Default

Range (Function .24).................................

3.5 Parameter Adjustments (Standard

Functions)...................................................

3.5.1 Keying in Standard Functions......................

3.5.1.1 Example of Programming Functions

.0, .1, .2, .3- .23..........................................

3.5.1.2 Example of Programming Functions

.19 & .2 (SP2)...........................................

3.5.1.3 Example of Programming Functions

.24 and Special Case of Function .2.........

3.5.1.4 Details of Standard Function .0- .25............

Table 3-4, Standard Functions.0- .25........

3.6 Examples of Parameter Adjustments...........

3.6.1 Changing SP1 Proportioning Time

(Function.4)...............................................

PAGE

1

1
2

5

5
5
7
9

11

11
11
14
14
14

16

18
18

19

20

21
22
23
34

34

ii

TABLE OF CONTENTS (Cont'd)

SECTION

3.7 Negative Temperature Ranging..................

3.8 Manual Mode (Auto/Manual) Function .0

Option 4- 100)...........................................

3.9 Park Mode...................................................

3.10 Linear Process Inputs.................................

3.11 Second Output Operation...........................

3.12 Details of Advanced Functions .26- .50......

Table 3-6, Advanced Functions .26- .50...

3.13 Parameter Lock...........................................

SECTION 4 DIAGNOSTICS................................

4.1 Fault Indication............................................

4.2 Loop Break Alarm.......................................

4.3 Operational Diagnostics..............................

4.3.1 Diagnostics (Functions .38- .49).................

4.3.2 Duty Cycle Monitor (DCM) (Function .42)..

4.3.3 Autotune Tuning Data

(Functions .43- .49)..................................

SECTION 5 TUNING............................................

5.1 Autotune......................................................

5.1.1 Autotune AT.................................................

5.1.2 Using Autotune AT.......................................

5.1.3 Autotune PT (Push-to-Tune)

Function .0 Option 2.................................

5.1.4 To Abort Autotune.......................................

5.1.5 Over-riding Autotune Values.......................

5.1.6 Autotune Hints............................................

5.1.7 Autotune Value Display...............................

5.1.8 Proportional Cycle Time..............................

5.2 Manual Tuning............................................

5.2.1 The Simplified Method................................

5.2.2 Alternative Tuning Method..........................

PAGE

36

36
36
36
37
38
39
44

45

45
46
47
47
48

48

49

49
49
50

51
52
52
52
53
54
57
57
58

iii

TABLE OF CONTENTS (Cont'd)

SECTION

5.3 Proportioning Time......................................

5.4 Proportional Band.......................................

5.5 Integral (Reset) Time..................................

5.6 Derivative (Rate) Time................................

5.7 Derivative Approach Control.......................

5.8 Heating and Cooling...................................

5.8.1 General Considerations..............................

5.8.2 Cool Strategy for Heat-Cool Applications...

5.8.3 Setting Up Routine for Heat-Cool Control..

SECTION 6 CALIBRATION................................

6.1 Display Offset..............................................

6.2 Recalibrating to a Remote Standard..........

6.2.1 Sensor Error Correction (Function .9)........

6.2.2 Sensor Span Adjust (Function .35).............

SECTION 7 115/230 VAC AND 2-WIRE/

3-WIRE RTD CONVERSIONS..............

7.1 To Remove Main PC Board........................

7.2 115/230 VAC Voltage Conversion...............

7.3 2-Wire/3-Wire RTD Conversion..................

7.4 Installing the Triac, 4-20mA and 0-10 VDC

Output Options..........................................

SECTION 8 SPECIFICATIONS..........................

APPENDIX A: Function Quick Reference

Guide...........................................

APPENDIX B: Quick Start Up Instructions

PAGE

61
62
62
63
63
64
64
64
65

67

67
67
67
68

71

71
72
73

73

75

80

82

This page is intentionally blank.

iv.

1

SECTION 1 INTRODUCTION

1.1 GENERAL DESCRIPTION

The OMEGA®CN9000A Series Miniature Autotune
Microprocessor Controllers are designed for accurate, precise
temperature control. They feature high accuracy and reliability, as
well as sophisticated PID or Autotune PID with approach control
(PDPI) for optimal control during start-up and steady-state
operation.

The CN9000A controllers feature models with user selectable
inputs from nine thermocouple types or 2-wire RTD, or models
with 3-wire RTD input. These units are °C/°F switchable, offer a

0.1° resolution up to 200°, and the second setpoint and output are

standard. The controller can also be programmed to accept linear
voltage signals up to 20 mV.

The CN9000A features advanced PDPI control, which enables the
unit to suppress overshoot, and allows the process warm-up to be
tuned independently from the steadystate operating conditions. For
other processes, a user may select PiD (Proportional-Integral­Derivative), PD (Proportional-Derivative). Proportional, or On/Off
control.

The CN9000A controllers are well suited to a broad range of
applications, and are easy to install and operate. For most
applications, the user need only select the desired input type by
using the front pushbuttons. The CN9000A is ‘pre-set’ for control
parameters which are suitable for most applications. These pre-set
(or default) parameters can be changed by the operator at any
time, in order to fine-tune the controller to an individual process.

The controller can easily be used in the Autotune Mode, allowing
the microprocessor to attempt to calculate the optimum PID
parameters.

Selection of all operational controls is made through the three keys
on the front panel of the CN9000A, with the display prompting the
user for each step. After the parameters have been set, they can
be 'locked-in' by removing the jumper located under the front
bezel. The user may select the control mode and parameters, the
display resolution (1° or 0.1°) and the units (°C/°F). The user may
also utilize the ranging feature of the instrument, which limits the
range in which a setpoint may be chosen, or lock-out an operator
from changing the setpoint.

2

The second setpoint (or output) of the CN9000A may have
proportional or on/off control. The second setpoint is set as a
deviation from the primary setpoint. Cycle time, proportional band
and on/off deadband are all set independently of the primary
setpoint (SP1).

The CN9000A display has a large 31/2 digit green LED readout,
with auxiliary indicators for output 1 and output 2, and three LEDs
to indicate deviation from setpoint. The microprocessor, in addition
to automatic processing of key calculations, holds the data in non­volatile memory-with the ability to retain data for up to 10 years
with no power.

Refer to Figure 1-1 and Table 1-1 for the CN9000A model number
information.

Refer to Figure 1-2 and Table 1-2 for the plug-in replacement
output board and socket model number information for the
CN9000A.

*SSD output is a Solid State Driver (5 Volt DC Pulse) designed to
be used with a DC controlled solid state relay such as OMEGA's
model number SSR240DC45 relay.

Figure 1-1. CN9000A Model Number Information

1.2 AVAILABLE MODELS

CODES for the Input Sensor

1 Thermocouple

2-Wire RTD, or
Linear Millivolt Signal

23-Wire RTD

CODES for Output

No. 2

13A Mechanical

Relay

2 5VDC SSD*

CODES for Output No. 1

15A Mechanical Relay
2 5VDC SSD*
3 1A Triac SSR
44-20 mA DC
50-10 VDC

A

CN9

3

TABLE 1-1

CN9000A MODEL NUMBER DETAILS

MODEL INPUT OUTPUT 1 OUTPUT 2

CN9111A Relay Relay

CN9112A Relay 5VDC SSD*

CN9121A 5VDC SSD* Relay

CN9122A 5VDC SSD* 5VDC SSD*

CN9131A 1 A Triac Relay

CN9141A 4-20 mA Relay

CN9151A 0-10 VDC Relay

CN9211A Relay Relay

CN9212A Relay 5VDC SSD*

CN9221A 5VDC SSD* Relay

CN9222A 5VDC SSD* 5VDC SSD*

CN9231A 1 A Triac Relay

CN9241A 4-20 mA Relay

CN9251A 0-10 VDC Relay

For 230 VAC, add "-230VAC" at the end of the part number.

*SSD output is a Solid State Driver (5 Volt DC Pulse) designed to
be used with a DC controlled solid state relay.

Thermocouple

2-Wire RTD

Linear Millivolt

Signal

3-Wire RTD

4

Figure 1-2. CN9000A Series Replacement Output Board

Numbering Information

TABLE 1-2

CN9000A REPLACEMENT OUTPUT BOARD DETAILS

MODEL OUTPUT 1 OUTPUT 2

BD9011A Relay Relay

BD9021A 5VDC SSD Relay

BD9012A Relay 5VDC SSD

BD9022A 5VDC SSD 5VDC SSD

BD9031A* 1 Amp Triac SSR Relay

BD9041A*† 4-20 mA DC Relay

BD9051A*† 0-10 VDC Relay

*Requires that BD9021A is already installed in the controller.
†For 230 VAC models, add "-230VAC" to the part number

CODE Output No. 2

1 3A Mech Relay
2 5VDC SSD

CODES for Output No. 1

1 5A Mechanical Relay
2 5VDC Solid State Driver (Pulse)
3 1A Triac SSR
4 4-20 mA DC
5 0-10 VDC

BD90

A

5

Remove the Packing List and verify that you have received all
equipment. If there are any questions about the shipment, please
call the OMEGA Customer Service Department at 1-800-622-2378
or [phone].

Upon receipt of shipment, inspect the container and equipment for
any signs of damage. Note any evidence of rough handling in
transit. Immediately report any damage to the shipping agent.

NOTE

The carrier will not honor any claims unless all shipping
material is saved for their examination. After examining and
removing contents, save packing material in the event
reshipment is necessary.

READ THESE CAUTIONS BEFORE YOU INSTALL,
OPERATE, OR SERVICE YOUR CN9000A

For safe use apply good engineering practices applicable to all
products of this type.

1. Install in a grounded metal enclosure, prevent live parts from

being touched and ground sensor sheaths to avoid possible
shock hazard.

2. Wire according to the information in this manual and conform

with the appropriate standards and regulations.

Output number 2 should not be used as an alarm in a safety circuit
where damage or personal injury may be caused by equipment
failure. A separate unit should be used, instead.

SECTION 2 INSTALLATION

2.2 CAUTIONS AND MOUNTING INSTRUCTIONS

INSTALLATION CAUTIONS

ALARM CAUTION

2.1 UNPACKING

CAUTION

6

The controller functions are user selectable. It is therefore the
user's responsibility to ensure that the controller configuration
corresponds to the factory's requirements and is safe. Remove the
parameter lock jumper to restrict tampering after configuration.

The CN9000A is mounted in a panel through a 1.772" (45 mm)
square

1

/16DIN 43700 cutout using the speciai mounting clip

provided (refer to Figure 2-1).

To install the CN9000A, remove the rear socket by pressing the
lock buttons. Slide the controller into the panel cutout from the
front. Slide the mounting clip back onto the controller from the rear.
Press to home position until the clip holds the unit firmly in place. If
necessary, the mounting can be further tightened using the jacking
screws. Plug the rear socket back into place on the controller.

To remove the controller from the panel, pull the legs of the
mounting clips away from the controller case to release the
ratchet.

The minimum spacing for mounting several controllers is shown in
Figure 2-2.

CONFIGURATION CAUTION

MOUNTING INSTRUCTIONS

*To unplug socket, press in lock buttons and pull apart

Figure 2-1. Controller Mounting and Panel

Cutout Dimensions

7

Figure 2-2. Mounting Multiple Units

The CN9000A operates on either 115VAC ±15%, 50/60 Hz (std)
or 230VAC ±15%, 50/60 Hz (selectable by changing internal
jumpers-discussed in Section 7). The CN9000A outputs feature
either the standard mechanical relay or the optional non-isolated
5VDC Solid State Driver pulse output (designed for operating an
external DC SSR such as an OMEGA SSR240DC45). Three other
optional outputs are available using a plug-in replacement
combination socket. These outputs are a 1A Triac SSR, 0 to
10VDC, or a 4 to 20 mA DC output. They are described in
Table 1-2.

Figure 2-3 shows the rear view of the controller and designates
which signals connect to the terminals. The chart directly following
Figure 2-3 details the actual connections.

NOTE

When mounting multiple units
allow 3-1/2 inches from center to
center of the unit in the vertical
direction to allow for mounting
bracket and wiring, and 2 inches
in the horizontal direction for heat
dissipation.

3-1/2" Min

2" Min

1.772” square
Cut-out (typ)

2.3 WIRING

8

Figure 2-3. CN9000A, Rear View, Signal Connection

Designations

TERMINAL DESIGNATIONS AND SIGNAL CONNECTIONS

1 AC Power, 115 VAC 50/60 Hz (230 VAC, optional)
2 AC Power, Neutral

3RTD (black, if 3-wire RTD) (For T/C, do not use terminal.)
4 Thermocouple (-); or RTD (black if 3-wire RTD); or Neg.

Voltage

5 Thermocouple (+); or RTD (red, if 3-wire RTD); or Pos.

Voltage

6 Output 2 (SP2) Mechanical Relay Normally Open (N.O.)
7 Output 2 (SP2) Mechanical Relay Common (C.) or 5V Pulse (-)
8 Output 2 (SP2) Mechanical Relay Normally Closed (N.C.);

or 5V Pulse (+)

9 Output 1 (SP1) Mech Relay N.O.; 1 A SSR N.O.; 5V Pulse

(-); 0-10V (-); or 4-20 mA (-)

10 Output 1 (SP1) Mech Relay C.; 1A SSR C; 5V Pulse (+);

0-10 V (+); or 4-20 mA (+)

11 Output 1 (SP1) Mech Relay N.C.; or 1A SSR N.C.

Check side label on controller for supply voltage before wiring.

Your choice of thermocouple types J, K, T, E, R, S, N, B,
J DIN, and the Pt100 2-wire RTD inputs are selectable via the keys
on the CN91XXA version of the controller. The CN92XXA controller
is configured to accept a 3-wire RTD input only. Figure 2-4 shows
how to wire any of these sensor inputs to the controller.

91011 12
N.O. C. N.C. L N

-+ OV

+­N.C. C. N.O. + ­876543

(Output 1) (Power)

(Output 2) (Input Signal)

1 A SSR, MECHANICAL RELAY

0-10V, 4-20 mA, SSD (PULSE)

SSD (PULSE)

MECHANICAL RELAY

CAUTION

9

Figure 2-4. Thermocouple and RTD Input Wiring

Figures 2-5 and 2-6 illustrate typical wiring of the CN9000A
Controllers. (Standard controllers operate on 115VAC 50/60Hz.
230VAC operation is optional.)

Connections for
Thermocouple

Connections for
2-wire Pt 100/RTD

Connections for
3-wire Pt 100/RTD

2.4 TYPICAL WIRING DIAGRAMS

Figure 2-5. Wiring Heater with Alarms

(Two Mechanical Relays-Model CN9111A)

LOW ALARM OR WITHIN LIMITS SIGNAL

HIGH ALARM OR OUT OF LIMITS SIGNAL

ALARM
SIGNAL

SUPPLY

LOAD

5A (max

115V±15% 50-60 Hz

N

L

10

Figure 2-6. Heating and Cooling CN9121A [One DC Solid

State Relay Driver for Heating (SP1), 3A Mechanical Relay

for Cooling (SP2)]

Figure 2-7. Wiring of single output controller

CN9110A, CN9210A

NOTE

The CN9000A Series has been designed to be as immune as
possible to electrical interference. However, electrical noise
suppression may be required in some applications, particularly if
the output of the controller is firing a contactor or coil. A noise
suppression kit is available for use with 115VAC, OMEGA part
no. 1821-101 (consists of an RC network or metal oxide varistor
(MOV)).

TYPICAL WIRING FAST BLOW FUSE

L

N

COOLING WATER

3A (max)

SOLENOID
VALV E

LOAD

SSR output SP1

DC
INPUT
SSR

11

The CN9000A is pre-set for control parameters that are suitable for
many applications. The CN9000A can be operated with the default
(pre-set) settings, or the default settings can be overridden by
more appropriate control modes and parameters and/or enabling
of the second setpoint, by programming the CN9000A through the
front panel keys. Refer to Table 3-1, Controls and Indicators and
Table 3-4, Standard Functions .0 through .25.

The CN9000A allows the user to use autotune rather than the
default settings. In the autotune mode, the controller will attempt to
select the optimum PID settings.

Figure 3-1 and Table 3-1 illustrate the controls and indicators of
the CN9000A Series Controller.

SECTION 3 OPERATION

3.1 GENERAL CONSIDERATIONS

3.2 CONTROLS AND INDICATORS

Figure 3-1. CN9000A Front Panel-Controls and

Indicators

1

2

3

4

5

12

1 LED Display

2 Deviation Indicators

ITEM CONTROL/INDICATOR FUNCTION

TABLE 3-1

CONTROLS AND INDICATORS

The four-digit display normally
shows process temperature to 1°C
or 1°F resolution (for example,
197°F). However, if the CN9000A is
set for a tenth degree resolution (up
to 200°), the display shows the
temperatures in 0.1°C or 0.1°F
increments (for example, 197.3°F).
The display also shows the setpoint
value (flashing) and the Function
and Option numbers when in the
Set-Up Mode. Functions are the
available controller facilities (e.g.,
Derivative); Options are the
available values for each Function
(e.g., Derivative value-50 seconds).
When in the Set-Up Mode,
remember that the Function
numbers are on the RIGHT and the
Option numbers are on the LEFT of
the floating decimal point.

These three LEDs display the
difference between set point and
process temperatures in five steps,
each one representing 2% of full
scale value.

Flashing >3% above setpoint
Steady 1%-3% above setpoint
Steady ±1% about setpoint

Steady 1%-3% below setpoint
Flashing >3% below setpoint

The error indicator can also be
used in high resolution (±1% steps)
or low resolution (±4% steps).

13

TABLE 3-1 (Cont'd)

All three Error Indicator LEDs are
on when unit is in Manual or Park
Mode.

This LED is illuminated (green)
when the SP1 output is ON.

This LED is illuminated (red) when
the SP2 output is ON or OFF,
depending on mode of operation.
Refer to Function .31 in Table 3-6
for more details.

NOTE: The Parameter lock jumper is located under the lower front
bezel (discussed in Section 3.13).

ITEM CONTROL/INDICATOR FUNCTION

3 SP1 Output Indicator

4 SP2 Output Indicator

5 Control Keys

When pressed, displays the
SP1 temperature.

Pressed simultaneously
increases the SP1
temperature value.

Pressed simultaneously
decreases the SP1
temperature value.

Selects Set-Up Mode (entry
into the Function and
Option commands -refer to
Table 3-4). Display flashes,
normal temperature control
is maintained.

When in the Set-Up Mode,
increments the Function
and Option numbers up or
down.

When in Set-Up Mode,
changes the sub mode from
Functions to Options and
vice-versa.

★

★

★

P

or

★

14

For ease of use in normal applications, the CN9000A has been
pre-set with factory or Default settings (or Parameters). Section 3.5
discusses how to change these Default settings.

These pre-set Parameters enable the instrument to operate in the
PID Control Mode, with a single set point and slow cycle relay
output. This configuration should give good results where the
heater is adequately rated and the control sensor is located
reasonably close to it.

Default Settings (for SP1 only) are:

Proportional Time (Cycle Rate) = 20 seconds

Proportional Band (Gain) = 2.5% of Default full scale

Derivative Time (Rate) = 25 seconds

Integral Time (Reset) = 350 seconds

To use the controller with the Default settings requires only that the
correct Option number of the sensor. selected from Table 3-3,
Sensor Default Setpoint Range Table, be keyed into the
instrument. Also, check that the instrument is set to either °C or °F,
as required. (Refer to Function .22 in Table 3-4).

Also check that the desired control temperature is within
the Setpoint Default range. Refer to Section 3.4.2.

3.3 DEFAULT (PRE-SET) SETTINGS

3.4 GETTING STARTED

3.4.1 Selecting Sensor and Adjusting Setpoint

To operate unit:

Apply power. All LED segments will be briefly illuminated during
the self-check routine, then the display will request sensor
selection (from Table 3-3), i.e., the desired Option number for
Function .16, and will not respond to any further instructions until
this selection is made.

STEP ACTION DISPLAY

1 Install Unit. Power on. *Note: digits shown

1 Check that display reads: *bold are flashing

15

To key in the selected sensor
type Example: OPTION 2. K­Type thermocouple (page 31,
FN .16):
Check that the display reads:

To store the selected
thermocouple type into memory:
The display now reads the
sensor temperature, ex: ambient
= 70°F.

To key in the setpoint value:

to increase the setpoint:

to decrease the setpoint:
(It should be noted that the digit
rollover rate increases as arrow
keys are held.) ex: selected
setpoint = 250°F.

When the keys in (4) above are
released the unit will operate as
a normal temperature controller.
The square LED, is illuminated,
showing the SP1 output is
energized. To view the setpoint
temperature:

To re-adjust the setpoint value
at any time:

2

3

4

Refer to Table 3-2 for getting started with the commonly needed
Default settings of the control parameters. Changing from the
Default values will be covered in subsequent sections.

To operate with Autotune Settings, refer to Section 5.1
or Appendix B.

TABLE 3-2

OPERATION WITH DEFAULT SETTINGS

0.

1 6

2.

1 6

7 0

0

2

5 0

NOTE

If the display does not read 0.16 with the zero flashing, then the unit has already been
programmed with a sensor type. Refer to Table 3-4 and step through to Function .16 and set
proper sensor type. Note other functions may have to be changed as well.

Press Twice

Press P once

Press

Press ★

Repeat Step 4

Press

★ and hold

Press

16

When the Default settings are not suitable for your application,
the CN9000A can be tuned for optimum performance by the
adjustment of control Parameters. Section 5 will provide the
guidance needed to establish the appropriate settings.

Alternatively, the Autotune Option can be used to enable the
controllers microprocessor to attempt to calculate the optimum PID
Parameters. If you wish to use the Autotune Option, go to Section

5.1.2 and run Autotune AT.

The Default Range will limit the setpoint values. However, should a
particular application require the use of additional controller
features, for example: second setpoint output or tenth degree
resolution, refer to Section 3.5, Parameter Adjustments. The
instrument will indicate process temperatures over the full
linearized range shown in Table 3-4, Function .16. The Default
setpoint full scale (automatically selected by choice of sensor) may
be altered to any value within the linearized band (Table 3-4,
Function .16) by using the following procedure to adjust Function
.24. (Refer to Section 3.5 for more details on adjusting Functions).

Steps 1 through 6 are used to change the upper limit of the
setpoint range. Steps 7 through 10 are used to change the actual
setpoint and check the value.

Ensure that the setpoint range maximum is
compatible with safety requirements.

3.4.2 Changing the Allowable Setpoint Default
Range (Function .24)

CAUTION

Press the P button (use blunt tool since the P key is a
recessed button). The display shows "0.0" with the right most
digit (function number) flashing.

Press 24 times (or until the CN9000A displays "- -24" with
"24" flashing).

Press ★ to display the maximum allowable setpoint (for
example, "400" with "400" flashing).

1.

2.

3.

17

Press and hold in ★ Repeatedly press to increase value
(while pressing ★) Repeatedly press to decrease value
(while pressing ★).

Release ★ (and stop pressing or button).

Press the P button. The temperature is now displayed. The
upper limit of the allowable setpoint has now been changed.
The new allowable setpoint range can be checked by repeating
Steps 1, 2, 3.

Steps 1-6 are repeated in Section 3.5.1.3 for your convenience.

To change the setpoint to the desired value, press ★ and
hold in.

Press or to change the setpoint to the new value.

Release the ★ button. The temperature is now displayed.

Press the ★ button to check the setpoint value.

4.

5.

6.

7.

8.

9.

10

Note: If the Default setpoint range maximum is not suitable, it can
be increased or decreased to any desired value within the
linearized band

Fn .16 Min/Max
Option Type °C °F

1 J Iron-Constantan 0-400 32-800
2K CHROMEGA

®

ALOMEGA

®

0-400 32-800
3 N Nicrosil-Nisil 0-400 32-800
4R Pt-13% Rh/Pt 0-1600 32-1999
5S Pt-10% Rh1Pt 0-1600 32-1999
6T Copper-Constantan 0-250 32-500
7E CHROMEGA

®

-Constantan 0-500 32-1000
8J DIN Iron-Constantan 0-400 32-800
9 Pt100 100 Pt RTD( =0.00385) 0-200 32-400
10 B Pt-30% Rh/Pt-6% Rh 0-1600 32-1999

TABLE 3-3

SENSOR DEFAULT SETPOINT RANGE TABLE

NOTE

If an attempt is made to set the setpoint outside of the setpoint
range, the setpoint will be at the end of the range.

18

To change the CN9000A's Default Parameters to new parameter
settings, refer to this section and Section 3.6. All adjustable
parameters are held in memory.

There are two classes of Functions. Functions .0 through .25 are
STANDARD FUNCTIONS that are used more often and are easily
accessible to the user. Functions .26 through .50 are known as
ADVANCED FUNCTIONS. They are not designed to be changed
in the normal operation and should not be accessed except during
setup by qualified personnel.

NOTES

Because the selection of tenth degree resolution (Function .18
Option 1), °C/°F selection (Function .22), and setpoint range
adjustments influence the values of other settings and can have a
fundamental effect on control characteristics, it is important that,
when required, they should be made during initial set-up to avoid
the need for re-tuning.

If the temperature units scale (°C or °F) is changed, it is essential
to change the upper bezel to correspond to the units selected
(supplied with controller).

If you are having difficulty in adjusting the Options, refer to Section

3.13, Parameter Lock, since the unit may be in the locked mode.

Normal control is maintained with existing settings during
programming.

You need to know the Option code and Function number to set up
the CN9000A. For example, Option 0/Function .5 is SP1
Proportional Band of 2.5%.

Appendix A lists all the Function numbers and their names in a
short concise list.

Table 3-4 describes the Option details for Standard Functions
.0- .25.

Table 3-6 describes the Option details for Advanced Functions
.26 - .50.

3.5 PARAMETER ADJUSTMENTS (STANDARD FUNCTIONS)

3.5.1 Keying in Standard Functions

19

Ensure that the jumper behind
the lower front bezel is in the
Parameter Setting Position
(refer to Section 3.13). Note
Functions .1, .2, .3 are not
protected by the Parameter
Lock Jumper.

To convert the main display
from a temperature read-out
to the Function/Option Mode:

To change from Function .0 to
Function .16 (for example)

†

:

To change flashing Function
digit to Option digit:

To change from Option 0 to
Option 2 (for example)

††

:

To go to another Function:

When finished selecting the
Functions and Options (exiting
Program Mode), the
process temperature is
displayed. Control begins with
the new instructions now
entered into memory.

3.5.1.1 Example of Programming Functions. 0, .1,.2,.3,-.23

STEP ACTION DISPLAY

1

2

3

4

5

6

7

The following steps apply only to Functions .0,-.23. Section 3.6
covers more examples.

Press P

Option 0

Function .0

(flashing)

Press and Hold

until you see 0.16

Function (flashing)

Press ★

Option (flashing)

Press 2 times
Option (flashing)

Press ★ and

repeat steps 3-5 as

necessary

Press P

†

If using button, the Function number changes in the following sequence:

":0, .1, .2,.... .25” and back to “.0”. If using button, and the display shows

“.0" in Function place, the display changes to “.13” and then “.12, .11, ..., .0".

††

If using button, the Option number goes as high as 100. If using button,

the Option number goes down to 0.

0.

0

0.

1 6

0.

1 6

2.

1 6

T E M P

20

Ensure that the jumper behind
the lower front bezel is in the
Parameter Setting position
(the jumper should be on the
two right-most pins). Refer to
Section 3.13 if necessary.

To convert the main display
from a temperature read-out
to the Function/Option Mode:

To change from Function .0 to
Function .19:

To display Option:

To change Option value (refer
to Table 3-4); for example, 7:

To change to Function:

3.5.1.2 Example of Programming Functions .19 & .2 (SP2)

STEP ACTION DISPLAY

1

2

3

4

5

6

NOTE

When using SP2 as a tracking second setpoint (deviation from first
setpoint): Function .19, Options 1, 2, 3, or 7 will enable the second
setpoint and Function .2 is to be used to set the differential value
between the first and second setpoint.

Press P

Option 0

Function .0

(flashing)

Press

until you see 0.19

Function (flashing)

Press ★

Option (flashing)

Press to

increase (or

to decrease

depending on

Option value)

Flashing

Press ★ Function

(flashing)

0.

0

0.

1 9

0.

1 9

7.

1 9

7.

1 9

The following steps apply to Function .2. Function .19 must be set
up before setting Function .2.

21

3.5.1.3 Example of Programming Functions .24 and
Special Case of Function .2

To change from Function .19
to Function .2:

To change to Option Mode:

To change from Option
number; can go down to

-128° can go up to +127°,
since you selected option 7 in
Function .19. See the chart in
Function .2 to see the range
allowed. (For example, set to
100°).
To exit program mode (and
lock in parameters just set
up). Process temperature is
displayed.

Ensure that the jumper behind
the lower front bezel is in the
Parameter Setting position
(the jumper should be on the
two right-most pins). Refer to
Section 3.13 if necessary.

To convert the main display
from a temperature read-out
to the Function/Option Mode:

To change from Function .0 to
Function .24:

STEP ACTION DISPLAY

7

8

9

10

1

2

3

Repeatedly

Press

until you see 0.2

Function (flashing)

Press ★

Option (flashing)

Press to

increase value

Press P

Press P

Option

Function

(flashing)

Press 24

times

(flashing)

0.

2

0.

2

1 0 0.

2

T E M P

The following steps apply to Function .24 and Function .2 when
using SP2 as a full scale alarm or non-tracking second setpoint
(Function .19, Option 4 or 5).

- -

2 4

0.

0

22

To display maximum allowable
setpoint:

To increase or decrease the
setpoint:

To stop changing the setpoint:

To get back to process temp
(exit Function/Option Program
Mode). The upper limit of the
allowable setpoint is now
changed.

4

5

6

7

1.

2.

3.

Press ★

Press and hold

in ★ and

simultaneously

press to increase

or to decrease

value

Release fingers

Press P

STEP ACTION DISPLAY

Initial Configuration:

Function .16 must be selected first followed by settings in
Functions .17-.24 if required, then exit from Programming
Mode before making further selections. (Press P)
If 20 seconds is not a suitable Proportional Cycle Time for the
process, the correct value for Function .4 can be preselected
before Autotune (AT).

Protected Functions:

All Functions (except user settings Functions .1, .2 and .3)
may be locked into memory after setting to prevent
tampering. Put small jumper socket beneath lower bezel to
left pair of pins (Section 3.13).

Locating Standard Functions:

Function .0 is the Function starting point. From there, you can
go up or down.

3.5.1.4 Details of Standard Functions .0-.25

NOTES

Press to increase.
Press to decrease: display jumps directly to Function .13 to
access the higher Functions. Press and hold to scroll through

to Function .0.
Refer to Section 3.12 for ADVANCED FUNCTIONS.

4. 0 0

5. 0 0

T E M P

23

TABLE 3-4

STANDARD FUNCTIONS .0 THROUGH.25

NOTE: For each Function, the "0" Option is the default setting!

FUNCTION

This allows Autotune to be selected; either AT (Autotune at start­up) or PT (Push to Tune at setpoint). Park Mode (Option 3) allows
first output to be put on standby (turned off) while leaving the
second output activated for alarm or cooling, as described in
Section 3.9. Manual control of the heating output (Option 4-100)
can also be selected, and is explained in Section 3.8. This is the
function that the unit starts with when the Parameter (P) key is first
pressed.

.0 OPERATING MODES (Autotune/Auto-manual)

(Op#).(Fn#) Parameter/Comment

XXX.1 Adjusting the offset: enter in the amount of the

offset in ±1° steps (max to ±127° or one half of
the proportional band)

.1 MANUAL RESET (NOT USED IN PID)

(Op#).(Fn#) Parameter/Comment

0.0 Normal Operation

1.0 Start Autotune AT (Refer to Section 5.1)

2.0 Start Autotune PT (Refer to Section 5.1)

3.0 Park Mode (turns output 1 off)

4.0 to 100.0 Manual Heat % (Manual output adjustment)

If the CN9000A is used in Proportional only (P) or Proportional­Derivative (PD) without Automatic Reset, the system is offset by
digitally altering the value of the offset in ±1° steps, up to half of
the proportional band or ±127°, whichever is smaller. Use if
Function .8 (Integral Time) is not used. (Not protected by the
Parameter Lock jumper.)

24

TABLE 3-4 (Cont'd)

FUNCTION

.2 SETPOINT 2 ADJUST

.3 SETPOINT 1 LOCK

.4 CYCLE TIME/ON-OFF (OUTPUT 1)

Total length of time that the output will cycle on and off when the
temperature is within the proportional band. This can also be set
for ON/OFF Control. Note that cycle times of less than 10

seconds are not recommended for use when SP1 is a
mechanical relay. Option 6 should only be used with Analog

Outputs (4-20 mA DC or 0-10VDC).

If Function .19 (Setpoint 2 Operation Selection) is set to Option 1,
2, 3 or 7, deviation from setpoint 1 is in 1° steps, up to 127° (12.7°
in tenth degree resolution). The second setpoint tracks the first
setpoint. Therefore, if the first setpoint is changed, the second
setpoint changes along with it. If Function .19 is set to Option 4 or
5, then the actual temperature is set for alarm, independent of the
first setpoint (non-tracking).
(Not protected by the Parameter lock jumper). User must set up
Function .19 first then Function .2 (Refer to Function .19).

Function .19 Fn.19 Select Fn .2
Parameter Op. No. Range Comment

Deviation Alarm 1,2,3 0-127° (tracking)
Full scale alarm 4,5 0-* (non-tracking)
Cool strategy 7 ±127° (tracking)

*For full range, refer to Function .16 chart.

Allows the first setpoint to be "locked" to keep it from being
changed inadvertently. (Not protected by Parameter Lock jumper).

(Op# .(Fn#) Parameter/Comment

0.3 Unlocked

1.3 Locked

25

TABLE 3-4 (Cont'd)

FUNCTION

.4 (Cont'd) CYCLE TIME/ON-OFF (OUTPUT 1)

(Op#).(Fn#) Parameter/Comment

0.4 20 sec (Default setting)
*1.4 1 sec
*2.4 5 sec

3.4 10 sec

4.4 30 sec

5.4 60 sec

6.4 Analog Outputs

(4-20 mA DC or 0-10VDC only)

7.4 ON/OFF

8.4 0.3 sec
*9.4 2 sec

*10.4 3 sec

*11.4 7 sec

12.4 14 sec

13.4 45 sec Operational

14.4 AT value

15.4 Latest calculated AT value

This is the percent of the Span (allowable setpoint range) both
below and above setpoint in which proportion action is active.
Output is 100% at the bottom of the proportion band, 0% at the
top, and proportional in between. If ON/OFF Control was selected
(Function .4, Option 7), then this selection represents deadband
(hysteresis), or the amount the temperature must fall after reaching
setpoint before the relay returns to original state.

*not recommended with mechanical relay

.5 PROPORTIONAL BAND/DEADBAND (OUTPUT 1)

26

(Op#).(Fn#) Parameter/Comment

SP1 Proportional SP1 Hysteresis in

ON/OFF

band/Gain mode (Deadband)

0.5 2.5% x range 1.25% x span

1.5 0.5% 0.25%

2.5 1 % 0.5%

3.5 2% 1 %

4.5 3% 1.5%

5.5 5% 2.5%

6.5 10% 5%

7.5 20% 10%

8.5 1.5% 0.75%

9.5 4% 2%

10.5 6% 3%

11.5 7% 3.5%

12.5 8% 4%

13.5 14% 7%

14.5 100% 50%

*15.5 AT value

TABLE 3-4 (Cont'd)

FUNCTION

.5 (Cont'd) PROPORTIONAL BAND/DEADBAND (OUTPUT 1)

Refer to Section 5.6. Set to OUT (Option 1) if Proportional Only
Control is desired.

*Note: You will not see 15.5 on the display. The actual AT value, in
%, will appear at the left side of the display.

.6 DERIVATIVE TIME/RATE (OUTPUT 1)

(Op#).(Fn#) Parameter/Comment

0.6 25 sec

1.6 OUT

2.6 5 sec

3.6 10 sec

4.6 50 sec

5.6 100 sec

(Option list continued on next page)

27

TABLE 3-4 (Cont'd)

FUNCTION

.6 (Cont'd) DERIVATIVE TIME/RATE (OUTPUT 1)

(Op#).(Fn#) Parameter/Comment

0.7 1.5 x proportional band

1.7 0.5 x proportional band

2.7 1.0 x proportional band

3.7 2.0 x proportional band

4.7 2.5 x proportional band

5.7 3.0 x proportional band

6.7 4.0 x proportional band

*7.7 AT value

(Op#).(Fn#) Parameter/Comment

6.6 200 s

7.6 1 sec

8.6 2 sec

9.6 3 sec

10.6 7 sec

11.6 15 sec

12.6 20 sec

13.6 35 sec

14.6 75 sec

*15.6 AT value

*Note: You will not see 15.6 on the display. The actual AT value, in
seconds, will appear at the left side of the display.

.7 DERIVATIVE APPROACH CONTROL (DAC) (OUTPUT 1)

Used to eliminate derivative action during system warm-up time.
Refer to Section 5.7.

*Note: You will not see 7.7 on the display. The actual AT value in
multiples of the proportional band will appear at the left side of the
display.

28

(Op#).(Fn#) Parameter/Comment

0.8 5 min (300 sec)

1.8 OUT: Manual Reset (Function .1 used)

2.8 0.5 min (30 sec)

3.8 1 min (60 sec)

4.8 2 min (120 sec)

5.8 3 min (180 sec)

6.8 10 min (600 sec)

7.8 18 min (1080 sec)

8.8 0.2 min (12 sec)

9.8 7 min (420 sec)

10.8 13 min (780 sec)

11.8 25 min (1500 sec)

12.8 33 min (1980 sec)

13.8 43 min (2580 sec)

*14.8 AT value

TABLE 3-4 (Cont'd)

FUNCTION

.8 INTEGRAL TIME (OUTPUT 1)

Also known as Automatic Reset. Refer to Section 5.5.

(Op#).(Fn#) Parameter/Comment

* 0.10 ON/OFF

*1.10 1 sec
*2.10 5 sec

*3.10 10 sec

(Options continued on next page)

*Note: You will not see 14.8 on the display. The actual AT value in
minutes will appear at the left side of the display

.9 SENSOR OFFSET (CALIBRATION)

.10 CYCLE TIME/ON-OFF (OUTPUT 2)

Provides correction at one single temperature. Adjust in 1° steps
(±127° max). Refer to Figure 6-1 for the Sensor Error Graph.

Cycle time for second setpoint. Set similarly to first setpoint
(Function .4). Note that SP2 must first be activated in
Function .19. The preset Default setting for SP2 is ON/OFF.

*not recommended with mechanical relay

29

TABLE 3-4 (Cont'd)

FUNCTION

.10 (Cont'd) CYCLE TIME/ON-OFF (OUTPUT 2)

Op#).(Fn#) SP2 Proportional SP2 Hysteresis in

Band/Gain ON/OFF mode

(Deadband)

0.11 2.5% x range 1.25%

1.11 0.5% x range 0.25%

2.11 1% x range 0.5%

3.11 2% x range 1%

4.11 3% x range 1.5%

5.11 5% x range 2.5%

6.11 10% x range 5%

7.11 20% x range 10%

8.11 1.5% x range 0.75%

9.11 4% x range 2%

10.11 6% x range 3%

11.11 7% x range 3.5%

12.11 8% x range 4%

13.11 14% x range 7%

14.11 100% x range 50%

(Op#).(Fn#) Parameter/Comment

4.10 20 sec

5.10 60 sec

6.10 Not Used

7.10 30 sec
*8.10 2 sec
*9.10 3 sec

*10.10 7 sec

11.10 14 sec

12.10 45 sec

Non-linear ranges for Cool Strategy:

13.10 0.15-10 sec

14.10 0.15-20 sec

15.10 0.06-15 sec

*not recommended with mechanical relay

.11 PROPORTIONAL BAND/DEADBAND (OUTPUT 2)

Set similarly to first setpoint Proportional Band (Function .5).

30

Controller detects a break in the control loop caused by a sensor
short or heater break. This is the amount of time the controller will
wait for the control action to have an affect before an error
message is given (EE3). Not recommended for control around
ambient temperature. Option 14 is recommended for typical
applications (two times integral time). Refer to Section 4.2.

TABLE 3-4 (Cont'd)

FUNCTION

.12 LOOP BREAK ALARM TIME

(Op#).(Fn#) Parameter/Comment

0.12 OUT

1.12 1 min

2.12 2 min

3.12 4 min

4.12 6 min

5.12 8 min

6.12 10 min

7.12 15 min

8.12 20 min

9.12 30 min

10.12 40 min

11.12 50 min

12.12 70 min

13.12 90 min

Recommended initial setting:

14.12 2 x Operational Integral Time

.13 ACTIVATE ADVANCED FUNCTIONS .26-50

.14 NOT USED

Advanced Functions to be selected at initial setup by qualified
personnel only.

Press ★ for 5 seconds to access Advanced Functions .26-.50.

CAUTION

31

Allows quick reset of all Functions to Default settings. Only
Function .22 (°C/°F) and Function .9 (Sensor Offset) will not
be reset. NOTE: 'Hidden' Function 15/Option 5 resets all functions,
except Function .22.

TABLE 3-4 (Cont'd)

FUNCTION

.15 RESETTING FUNCTION'S .0 -.24 TO DEFAULT SETTINGS

Op.Fn Sensor Default Range Linearized Range

Type °C °F °C °F

1.16 J 0 to 400 32 to 800 0 to 800 32 to 1470

2.16 K 0 to 400 32 to 800 0 to 1200 32 to 1999

3.16 N 0 to 400 32 to 800 0 to 1200 32 to 1999

4.16 R 0 to 1600 32 to 1999 0 to 1600 32 to 1999
5 16 S 0 to 1600 32 to 1999 0 to 1600 32 to 1999

6.16 T 0 to 250 32 to 500 -199 to 250 -199 to 480

7.16 E 0 to 500 32 to 1000 0 to 600 32 to 1110

8.16 J-DIN 0 l0 400 32 to 800 0 to 800 32 to 1470

9.16 Pt100 0 to 200 32 to 400 -199 to 400 -199 to 750

10.16 B 0 to 1600 32 to 1999 0 to 1800 32 to 1999
(Options cont'd on next page)

NOTE

Range adjustments (including Default) only limit
setpoint values. Process temperatures will be
displayed over the full linearized range.

Selects thermocouple type or RTD. This is the first selection that
must be made for the unit to be used. NOTE: If 3-wire RTD
configuration is ordered, the Pt-100 (Option 9) must be selected.
Option 0 causes the CN9000A to "lock up" (another Option must
be selected to "bring the CN9000A back to life").

.16 INPUT SENSOR SELECT & RANGE TABLE

(Op#).(Fn#) Parameter/Comment

0.15 Normal

1.15 Reset (Functions .22 and .9 will not reset)

5.15 Resets all functions except Function .22

32

TABLE 3-4 (Cont'd)

FUNCTION

.16 (Cont'd) INPUT SENSOR SELECT & RANGE TABLE

.17 NEGATIVE TEMPERATURES

Allows for activation of second setpoint. Refer to Second Output
Operation, Section 3.11. Note that in ON/OFF mode, SP2 can act
as a deviation alarm from the first setpoint. It can be set as a high
deviation, low deviation, or either high or low deviation (out of
bounds).

LINEAR PROCESS INPUTS (SEE SECTION 3.10)

(Op#).(Fn#) Input Display

11.16 0-20 mV 0-100

12.16 4-20 mV 0-100

13.16 0-20 mV 0-1000

14.16 4-20 mV 0-1000

15.16 0-20 mV 0-2000

Must be enabled to allow negative temperatures to be measured
(using either T thermocouple or RTD only).

(Op#).(Fn#) Parameter/Comment

0.17 Disabled

1.17 Enabled

.18 DISPLAY RESOLUTION (1 OR 0.1 DEGREE)

Allows selection of 0.1° resolution over limited temperature range
(-199.9 to + 199.9). Note: this affects other selections, such as
setpoint. Settings in 1° increments become 0.1° when Option 1 is
selected.

(Op#).(Fn#) Parameter/Comment

0.18 Normal (1°)

1.18 High (tenth deg) Resolution (0.1°):

-199.9° to + 199.9

.19 SETPOINT 2 OPERATION SELECTION

33

TABLE 3-4 (Cont'd)

FUNCTION

.19 (Cont'd) SP2 OPERATING MODE

Allows for selection of upscale or downscale protection for second
output.

Make the proper selection here in Function .19 before adjusting
SP2 in Function .2.

(Op#).(Fn#) Parameter/Comment

0.19 OUT

1.19 Deviation alarm-High (Above SP1)

2.19 Deviation alarm-Low (Below SP1)

3.19 Deviation band alarm (Out of Limits)

4.19 Full scale alarm-High (Non-tracking)

5.19 Full scale alarm-Low (Non-tracking)

6.19 LBA-Loop Break Alarm

7.19 Cool strategy

.20 SENSOR BREAK PROTECTION (OUTPUT 1)

.21 SENSOR BREAK PROTECTION (OUTPUT 2)

Allows for selection of upscale or downscale thermocouple break
protection for first setpoint so that output will be in safest state if
input is lost. Most heating applications require upscale protection.

(Op#).(Fn#) Parameter/Comment

0.20 SP1 output OFF (upscale)

1.20 SP1 output ON (downscale)

(Op#).(Fn#) Parameter/Comment

0.21 SP2 output OFF (upscale)

1.21 SP2 output ON (downscale)

34

TABLE 3-4 (Cont'd)

FUNCTION

.22 °C/°F SELECTION

.23 SOFTWARE VERSION NUMBER

.24 UPPER SETPOINT LIMIT (SPAN)

.25 (Not Used)

3.6.1 Changing SP1 Proportioning Time (Function .4)

3.6 EXAMPLES OF PARAMETER ADJUSTMENTS

To change SP1 proportioning time from 20 seconds (Default
setting) to 30 seconds, access Function .4 and change the Option
number from 0 to 4. See the example that follows.

(Op#).(Fn#) Parameter/Comment

0.22 °C (not reset by Function .15)

1.22 °F (not reset by Function .15)

Allows selection of °C or °F for display. Note that the correct bezel
must be used.

Read only-not changeable, factory set. Functions .28 and .30 are
not operational with Software Version 3 or less.

Allows changing of high end of allowable setpoint range, set in 1°
increments. Refer to Section 3.4.2.

Refer to Function .16 for linearized range table. Select before
Tuning.

NOTE: Functions .26 through .50 are the Advanced
Functions and are discussed in Section 3.12 as well as
Table 3-6.

The following two sections are examples of parameter adjustments
for the CN9000A Controller.

35

TABLE 3-4 (Cont'd)

STEP ACTION DISPLAY

To display OPTION/FUNCTION
List: Ensure that jumper behind
lower bezel is in ‘unlocked’
position.

To change the FUNCTION
number to 4:

Change to OPTION numbers:

To change OPTION number 0
to OPTION number 4:

To place in memory:

1

2

3

4

5

Press P

Press 4 times

Press ★

Press 4 times

Press P

0. 0

0. 4

0. 4

4. 4

T E M P

Process temperature is 252°
To view the setpoint
temperature:

To correct ‘offset’ of -2°C.

Change to FUNCTION .1:

Change to OPTION numbers
flashing:

To key in the ‘offset’
temperature (-2°C):

To place in memory:
The process temperature
reading will settle from 252°C
to 250°C.

1

2

3

4

5

6

Press ★

Press P

Press

Press ★

Press twice

Press P

2 5 2

2 5 0

0. 0

0. 1

0. 1

- 2. 1

2 5 0

STEP ACTION DISPLAY

3.6.2 Use of Manual Reset

P and PD mode. When the system has settled, if a discrepancy
exists between Setpoint and Process Temperature, the ‘offset’ can
be removed by the use of Manual Reset. For example, if the
process temperature is 252°C and the setpoint is 250°C.

36

The following sensor types can be used for negative temperatures.
The negative value shown against each type is automatically set
by the choice of sensor (Function .16) and requires enabling with
Function .17, Option 1.

Type T: -90°C, -130°F
Pt100: -100°C, -148°F
Type N: -50°C, -58°F non-linearized
Type K: -50°C, -58°F non-linearized

NOTE

By using a precision one (1) ohm resistor, a
4-20 mA DC or 0-20 mA DC input can be
converted to 4-20 mV or 0-20 mV respectively.

3.7 NEGATIVE TEMPERATURE RANGING

3.9 PARK MODE

3.10 LINEAR PROCESS INPUTS

3.8 MANUAL MODE (AUTO/MANUAL) (FUNCTION 0 OPTION
4-100)

Enables the heater power to be manually adjusted in the event of
a sensor break, thus avoiding a plant shutdown at an inconvenient
time. The duty cycle monitor (DCM) provides a guide to a suitable
manual heat power setting. This Manual Mode function is Function
.0, Options 4 through 100. All three of the Error Indication LEDs
are on when unit is in Manual Mode. Display shows a flashing
number that represents % output followed by an H (for % heat).
Example: at 50%, Manual Mode display shows 50H with the 50
flashing.

Temporarily switches off SP 1 output, the controller otherwise,
remains fully operational. Normally used during startup, for
example, to disable a fast load to adjust to setpoint and then start
autotune or to cool from setpoint. The park mode function is
Function .0, Option 3. All three of the error Indication LEDs are on
when unit is in Park Mode.

Five linear inputs (Function .16, Options 11, 12, 13, 14, and 15)
enable non-temperature process applications to be controlled. The
input signal may be either 0-20 mV or 4-20 mV. Full scale display
is provided for 100, 1000 and 2000 engineering units.

Typical

Examples of

Use

Alarm High

Alarm Low

Deviation

Alarm

High & Low

SP2

Cooling

SP1 Cooling
SP2 Heating

SP2 LED

Is On

Above

SP2 Setting

Below

SP2 Setting

Outside Set

Band Around

SP1 Setting

Above

SP2 Setting

Below

SP2 Setting

SP2 Relay

is Energized

Below

SP2 Setting

Above

SP2 Setting

Within Set

Band Around

SP1 Setting

Above

SP2 Setting

Below

SP2 Setting

Control Mode

(Function .10)

ON/OFF

(Option 0)

Proportional

(Options 1-7)

Operating Mode

(Function .19)

Setting

Compared

to SP1

High

(Above SP1)

Options 1 or 4

Low

(Below SP1)

Options 2 or 5

Out of Limits
(Above SP1)

Option 3

High

(Above SP1)

Options 1 or 7

Low

(Below SP1)

Option 2

37

The following table shows operation of SP2 when Functions .30
and .31 are in the Default settings.

TABLE 3-5

SP2 OPERATION

3.11 SECOND OUTPUT OPERATION

38

Ensure that the jumper behind
the lower front bezel is on the
two right-most pins

To convert the display from
temperature readout to
Function/Option Mode:

Change to Function .13:

To get to the Advanced
Functions:

To change to another Function
number:

To select Option number:

To change Option number:

To exit Program Mode:

*Bold type means digit is flashing

†Temperature of sensor will be

displayed

STEP ACTION DISPLAY

1

2

3

4

5

6

7

8

Press P

Option 0

Function 0

(flashing)

Press

Press and hold ★

until .38 appears

Press to go up

press to go

down

Press ★

Option

(flashing)

Press or

as many times as

required to get

Option number that

you want

Press P

0.

1 3

0.

3 8

0.

4 2

0.

3 1

0.

3 1

1.

3 1

T E M P

0.

0

3.12 DETAILS OF ADVANCED FUNCTIONS .26-.50

The following steps describe the sequence of keys one must press
to change any of the Options related to Functions .26 through .50.
Access is gained into these Advanced Functions via Function .13,
as described below.

39

FUNCTION

(Op#).(Fn#) Parameter/Comment

0.26 100% x max output

1.26 95%

2.26 90%

3.26 85%

4.26 80%

5.26 75%

6.26 70%

7.26 65%

8.26 60%

9.26 55%

10.26 50%

11.26 45%

12.26 40%

13.26 30%

14.26 20%

15.26 10%

TABLE 3-6

ADVANCED FUNCTIONS.26 -.50

NOTE

.26 HEATING OUTPUT LIMIT (OUTPUT 1)

These Advanced Functions, .26 through .50,
are not required for day-to-day use. They
should not be accessed except during set-up
by qualified personnel.

Allows adjustment of maximum output to heater in percent.
Example: if 50% (Option 10) is selected, then the output of the
controller would never be allowed to be greater than 50%. This
might be used with an oversized heater. Autotune can not be used
with SP1 heat limit other than 100% (Option 0). Example: with 10
second cycle time 50% (Option 10) would never allow more than 5
sec on 5 sec off when controller calls for 100% output. Not
applicable if SP1 is ON/OFF.

40

Allows reversal of action of SP1 LED (e.g. change to on when
logically off and off when logically on).

TABLE 3-6 (Cont'd)

FUNCTION

.27 COOLING OUTPUT LIMIT (OUTPUT 2)

.28 OUTPUT 1 DIRECT/REVERSE (HEAT/COOL)

.29 OUTPUT 1 LED OPERATION

Same as Function .26 but for cooling. Used when cooler is
oversized. Sets the limit to the maximum cooling power %
required.

(Op#).(Fn#) Parameter/Comment

0.27 100% x max

1.27 80% output

2.27 60%

3.27 50%

4.27 40%

5.27 30%

6.27 20%

7.27 10%

(Op#).(Fn#) Parameter/Comment

0.28 Reverse Acting (Heating)

1.28 Direct Acting (Cooling)

(Op#).(Fn#) Parameter/Comment

0.29 ON when logically on (standard)

1.29 OFF when logically on (reversed)

Allows action of output to set to reverse acting for heating
(standard) or direct acting.

WARNING

Inverting output may affect controller
failsafe characteristics.

Selection should only be made by qualified personnel. Consult
OMEGA if you are not sure of your application. This function is not
available with Software Version 3. Refer to Function .23.

41

TABLE 3-6 (Cont'd)

FUNCTION

.30 OUTPUT 2 DIRECT/REVERSE

Allows action of second output to be set to direct acting for cooling
(standard) or reverse acting.

WARNING

Inverting output may affect controller
failsafe characteristics.

Selection should only be made by qualified personnel. Consult
OMEGA if you are not sure of your application. This function is not
available with Software Version 3. Refer to Function .23.

(Op#).(Fn#) Parameter/Comment

0.30 Direct Acting (cooling)

1.30 Reverse Acting (Heating)

(Op#).(Fn#) Parameter/Comment

0.31 ON when logically on (standard)

1.31 OFF when logically on (reversed)

(Op#).(Fn#) Parameter/Comment

0.32 Normal (2% range/segment)

1.32 High (1%)

2.32 Low (4%)

.31 OUTPUT 2 LED OPERATION

Allows reversal of action of SP2 LED (e.g. change to on when
logically off and off when logically on). Refer also to Function 19.

.32 ERROR INDICATION RESOLUTION

Allows adjustment in the indication of the deviation from setpoint.

42

(Op#).(Fn#) Parameter/Comment

0.36 Normal

1.36 Latch (cont'd)

TABLE 3-6 (Cont'd)

FUNCTION

.33 TEMPERATURE DISPLAY SENSITIVITY

Allows faster or slower (damped) response to output signal.

(Op#).(Fn#) Parameter/Comment

0.33 Normal

1.33 High

2.33 Low

(Op#).(Fn#) Parameter/Comment

0.34 0.5 x derivative time

1.34 0.2

2.34 0.7

3.34 1.0

.34 DERIVATIVE POLLING RATIO

Allows adjustment of the frequency at which the controller checks
the derivative function. This should not have to be adjusted from
the Default value (0.5 x Derivative Time) for most processes. Not
applicable if SP1 derivative is not used.

.35 SENSOR SPAN ADJUST (CALIBRATION)

Allows adjustment of slope span for calibration. Should not need to
be used in normal conditions. Refer to Section 6.2.2.

1° steps (+15°/-16° max)

.36 LIMIT (LATCHING) CONTROL (OUTPUT 2)

Allows the second setpoint (SP2) to be used for limit (latching)
alarm with manual reset. Relay will not reset itself until operator
acknowledges when alarm condition no longer exists.

43

.36 (Cont'd) LIMIT (LATCHING) CONTROL (OUTPUT 2)

.37 (Not used)

FUNCTIONS .38 -.49 ARE PERFORMANCE DIAGNOSTICS

.38 RESETS FUNCTIONS .39 TO.42

FUNCTIONS .39 through .49 can only be READ.

To read, press ★

.39 READ TEMPERATURE VARIANCE

.40 READ MAXIMUM TEMPERATURE

.41 READ MINIMUM TEMPERATURE

.42 READ DUTY CYCLE MONITOR

.43 READ AUTOTUNING OVERSHOOT 1

.44 READ AUTOTUNING OVERSHOOT 2

.45 READ AUTOTUNING UNDERSHOOT

Only for: SP2 ON/OFF mode Function .19/Options 1 through 5.
PRESS simultaneously to reset (in non-alarm condition).

Reads the difference between the maximum and minimum
temperatures (0.1° resolution). Press ★ to read.

Monitors power (SP1 % on time) in previous proportioning cycle.
Average several readings for more accurate result. Refer to
Section 4.3.2. Press ★ to read.

Measured in °C/°F, maximum 255°/Hi-Res 25.5°. Refer to Section

4.3.3. Press ★ to read.

Display shows Function .38 (0.38) after getting to Function .13.

Read maximum temperature in °F or °C. Press ★ to read.

Measured in °C/F°, maximum 255°/Hi-Res 25.5°. Press ★

Measured in °C/°F, maximum 255°/Hi-Res 25.5°.

Reads minimum temperature in °F or °C. Press ★ to read.

TABLE 3-6 (Cont'd)

FUNCTION

(Op#).(Fn#) Parameter/Comment

0.38 Off

1.38 Start

44

Figure 3-2. Parameter Lock Positions

TABLE 3-6 (Cont'd)

FUNCTION

.46 READ QUARTER CYCLE TIME 1

.47 READ QUARTER CYCLE TIME 2

.48 READ QUARTER CYCLE TIME 3

.49 READ QUARTER CYCLE TIME 4

.50 (Not used) Press to go to Function .0.

3.13 PARAMETER LOCK

Measured in seconds, minimum of 2 seconds, maximum of 1800
seconds (30 minutes).

Measured in seconds, minimum of 2 seconds, maximum of 1800
seconds (30 minutes).

Measured in seconds, minimum of 2 seconds, maximum of 1800
seconds (30 minutes).

Measured in seconds, minimum of 2 seconds, maximum of 1800
seconds (30 minutes).

The chosen Parameters may be mechanically locked into memory
by removing or altering the position of the jumper behind the lower
front bezel (refer to Figure 3-2). Note that locked positions (2) and
(3) are alternatives and that the jumper socket is in the "inactive"
or locked position in (2). When the Parameter Lock has been
applied, only the Set-Up adjustments listed below are possible
(depress the P key):

1. Adjust Manual Reset (PD, P and ON/OFF modes only)-refer to
Section 3.6.2 for key sequences.

2. Adjust the second setpoint (assuming Function .19, either
Options 1, 2 or 3 have been selected).

3. Lock the main setpoint to prevent adjustment by the operator.

Jumper

Parameter Setting Position (1)
(Factory set in unlocked position)

Locked Position (2)

Locked Position (3)

45

ERROR APPLICATION
CODE PROBLEMS ACTION RESET

EE1 Sensor burnout Check sensor Self clearing
EE2 RTD/Pt 100 short Check sensor Self clearing
EE3 LBA Loop break Check control Latches: Reset

loop

Autotune AT/PT tuning cycle problems

Autotune run aborted: Previous values retained
EE5 Outside time limit Latches: Reset
EE6 Overshoot exceeds limit Latches: Reset
EE7 Unable to run Autotune, Latches: Reset

SP1 in ON/OFF mode

Software problems

EE8 Calibration data Replace CN9000A See next page

error if it persists

EE9 System error Replace CN9000A See next page

if it persists

H Unit in If Manual Mode Reset to 0.0

Manual Mode not desired, for normal

check Function .0 operation

SECTION 4 DIAGNOSTICS

4.1FAULT INDICATION

Depending on the selection made at Functions .20 and .21, the
SP1 and SP2 outputs are turned ON or OFF if sensor is open. The
main temperature display, on a fault indication, is replaced by "EE"
flashing, followed by a digit. This indicates that an error has been
detected in the system. Action should be taken as follows:

46

If EE8 or EE9 do not clear themselves, the following can be
attempted. Disconnect power and make sure that the jumper is in
the unlocked position (across center and right pins under the key
pad). Then press P key and keep pressing it. Finally reconnect
power for 10 seconds, and release P key. This will clear memory.
All functions will go to default state and must be reprogrammed.

PRESS simultaneously to reset latched message.

If you have any other problems, contact the OMEGA Customer
Service Department at 1-800-622-2378 or [phone].

The Loop Break Alarm (LBA) detects a control loop fault, and
displays an error message (EE3). In addition the SP2 relay may be
configured to act in the LBA state. Note that the SP1 output state
is unaffected by LBA alarm condition.

The LBA operates if the controller fails to receive a correct
response to the output within a limited time period. Specifically, the
LBA state occurs when the SP1 output is at 0% or 100%, and is
unresponsive within the LBA waiting time specified in Function .12.
The controller is considered to be unresponsive if the process
temperature fails to move a minimum of 50% of the proportional
band (or hysteresis if SP1 is in the ON/OFF mode). Figure 4-1
shows the kinds of faults detected by the LBA.

4.2 LOOP BREAK ALARM

Figure 4-1. Typical faults detected by LBA

47

Selecting LBA-EE3 message only:

1. Step to Function .12-LBA time Option 0-LBA OUT, displayed.

2. PRESS ★ to change to option.

3. PRESS to select Option 14, the recommended initial setting

(2 x the control band in use).

4. In the LBA alarm condition, EE3 is displayed alternating with

process temperature. The alternating EE3 display latches until
reset. To reset, Press simultaneously.

To configure Alarm relay SP2 to LBA:

Select Option 6 in Function .19 (Relay latches in alarm
condition, to reset, Press simultaneously).

NOTE

Reset EE3/Relay before any other program changes.

Used to assist with machine operation and troubleshooting.

Monitors and displays minimum and maximum temperatures, and
variance (deviation) to 0.1°C/°F.

Displayed temperatures are measured values, independent of
setpoint. This high sensitivity monitor may be affected by
interference. (Use a snubber to minimize disturbance).

4.3 OPERATIONAL DIAGNOSTICS

4.3.1 Diagnostics (Functions .38 -.49)

effect of

load change

ie min

Temperature

setpoint

Overshoot

Variance

Min/max.

max - SP
overshoot

to 0.1

Figure 4-2. How to use Functions .38 -.41

Time

48

Monitors percentage of power used in the previous proportioning
cycle. Average several readings for a more accurate result.

Power requirements outside the range 20%-80% may be difficult to
control and autotune.

1To start monitoring: Select Function .38/Option 1
2To return to normal operation: Press P
3To view readings: Select Functions .39-.42
4To stop monitor: Select Function .38/Option 0

(Readings are retained)

5 Reset Select Function .38/Option 1

Readings reset on next or On de-powering
monitor start.
Monitor and readings reset

4.3.2 Duty Cycle Monitor (DCM) (Function .42):

4.3.3 Autotune Tuning Data (Functions .43 -.49)

Functions .43 through .49 provide data on size and length of
oscillations used by the controller in "learning the system" while
autotuning. Refer to Figure 4-3. Also refer to Section 5.1, Autotune.

Function .43: OS1 (overshoot 1)
Function .44: OS2 (overshoot 2)
Function .45: US (undershoot)
Function .46: T1 (quarter cycle time 1)
Function .47: T2 (quarter cycle time 2)
Function .48: T3 (quarter cycle time 3)
Function .49: T4 (quarter cycle time 4)

Figure 4-3. Autotune Tuning Data (Functions .43-.49)

Temperature

Autotune
setpoint

new PID
values
entered

overshoot (OS)

undershoot (US)

OS2

OS1

US

T4

T3T2T1

Quarter cycle times (OCT)

Time

49

5.1.1 Autotune AT

Start Autotune AT with the load cool. A short tuning cycle occurs at
75% setpoint during warm up. New PID values are automatically
entered and the temperature rises to setpoint.

Autotuned Parameters Autotune Limits

Entered automatically:

Proportional Band/Gain 0.5%-20% range
Integral time/Reset 0.2-43.5 min
Derivative time/Rate 1.0-255 sec
DAC/Approach control 0.5-9.0 x gain

Proportional cycle time 0.8-81.9 sec
calculated but for safety reasons needs manual confirmation.
Refer to Figure 5-1.

Figure 5-1. Autotune AT

Temperature

setpoint

tuning

DAC

PID

AT tuning

75% SP

Time

Start AT

(100% output power)

new PID values

entered and

output

power re-applied

SECTION 5 TUNING

5.1 AUTOTUNE

Two types of autotune are provided to ensure optimum control of a
wide spread of applications.

Autotune AT: normal method, tunes during warm up (start up).

Autotune PT (push-to-tune): for difficult applications, fine tunes at
setpoint.

50

NOTE

Read the following before using the Autotune feature.

See Section 3.5 to change functions.

1. Functions .16-.24 should be selected first unless default values

are used.

2. Adjust range if required (see Functions .16 and .24).

3. Select high (tenth degree) resolution (0.1°) (Function .18) or

Negative Temperature Ranging (Function .17) if required.

4. Select required display units (°C/°F)-Function .22.

5. Proportional cycle time, factory set at 20 seconds, may be

changed (Function .4 or .10), or by accepting the optimum time
calculated after running AT.

NOTE

For units with a mechanical relay (or a mechanical contactor
in the system), do not attempt Autotune with a cycle time
shorter than 20 sec.

6. For best results, use normal setpoint and load conditions.

7. Start with the cool load.

To Autotune:

8. Start Autotune process near ambient temperature, and follow

these 4 steps.

5.1.2 Using Autotune AT

To get into Program Mode:

To change to Option Mode:
(leaving the Function as .0).

STEP ACTION DISPLAY

1

2

Press P

Function (flashing)

Press ★

Option (flashing)

0.

0

0.

0

51

5.1.3 Using Autotune PT (Push-to-Tune) Function .0, Option 2

Used to fine tune difficult applications at setpoint. Useful if the
setpoint or thermal conditions are substantially changed.
During PT tuning some overshoot will occur. If this is
unacceptable, temporarily lower the setpoint. PT tunes the
parameters listed above except DAC. Proportional cycle time is
recalculated but needs manual confirmation.

Figure 5-2. Autotune PT

To change Option 0 to
Option 1:

To start Autotune process:
"AT" display will alternate with
process temperature display.

STEP ACTION DISPLAY

3

4

Press

Option (flashing)

Press P

1.

0

A T

T E M P

NOTE

The Autotune algorithm can be tried on any process.
However, it is designed to work best for heating
processes when the setpoint is at least 100°F (50°C)
above ambient. Other processes may need to be
manually tuned for best results.

Temperature

Start PT

setpoint

prop band

new PID

values

entered

Time

(100% output power)

52

After AT/PT, any Autotuned parameter may be changed to an
Option from the table. The original Autotuned value is retained in
memory.

To get to Function Mode:

To get to Option Mode:

To change Option 1 to
Option 0:

To get back to process
temperature:

STEP ACTION DISPLAY

1

2

3

4

Press P

Function (flashing)

Press ★

Option (flashing)

Press

Option (flashing)

Press P

1.

0

1.

0

0.

0

T E M P

5.1.4 To Abort Autotune

5.1.6 Autotune Hints

5.1.5 Over-riding Autotune Values

To abort Autotune, simply do the following:

NOTE

Subsequent Autotune AT or PT replaces manual
selections with new calculated values (except Cycle
Time).

For Autotune error messages, see EE5 through EE7 in Section

4.1. Latched: Press simultaneously to reset.

AT/PT tunes most applications satisfactorily, but if tuning fails and
error messages repeatedly occur, the application has unusual
characteristics requiring manual tuning.

Tuning with setpoint near ambient temperature: Difficult both to
control and Autotune. Use PT. If tuning fails, try using Function
.5/Option 1. Otherwise increase setpoint or tune manually.

53

5.1.7 Autotune Value Display

In high resolution mode (tenth degree, 0.1°):

Should error message EE6 occur during tuning, select normal
resolution (Function .18/Option 0), then Autotune and reselect Hi­resolution mode.

At the end of an Autotune cycle, the AT value is automatically
entered and may be displayed in Functions:

Function .5 Prop band/Gain
Function .6 Derivative time/Rate
Function .7 DAC/Approach Control
Function .8 Integral time/Reset

For example to see the AT value for Function .5.

on left side of the display being
lit means that you are seeing the

AT value to the left of the function number.

Get into Program Mode:

Change to Function .5:

Change to Option Mode:

Change Option 0 to
AT Option:

STEP ACTION DISPLAY

1

2

3

4

Press P

Function (flashing)

Repeatedly

Press

Until you see

Function (flashing)

Press ★

Option (flashing)

Press

0.

0

0.

5

0.

5

2. 3. 5

†

†

54

Autotune Cycle Time:

Autotune calculates the optimum value but for safety reasons does
not automatically implement it. To see the calculated cycle time:

1 . Program for Function .4 Option 0, similar to the example in

Section 5.1.7.

2. Press once. To the left of the .4 Function code the

calculated cycle time will be displayed preceded by a “-”. To
accept this value, press P or ★.

3. To see the operational cycle time, press once. The new AT

operation cycle time will be displayed to the left of the .4
Function code.

5.1.8 Proportional Cycle Time

will be shown to the left of the numeral displays
when the operational value is displayed.

If the cycle time needed is shorter than the 20 second default
setting (e.g., 1 sec is generally used for driving an SSR and 0.05
sec is used for linear outputs), the user should select the
appropriate Option in Function .4. (Refer to Table 3-4). The cycle
time setting will not be changed automatically, but may be
replaced with the calculated AT value if preferred after the
Autotune run.

Normal Procedure

Run Autotune AT. When finished (alternating AT display stops)
display the AT calculated cycle time. If you want the displayed
value, lock it in (value replaces the previous cycle time setting).

Ensure that the jumper behind
the lower front bezel is in the
Parameter Setting position.

To convert the main display
from temperature read-out to
Function/Option Mode:

STEP ACTION DISPLAY

1

2

Press P

Function (flashing)

0.

0

55

AT cycle time values in Function 4:

Two AT cycle time values are stored to enable the current
operational value to be retained until a new value from a
subsequent Autotune run is considered.

Example of two AT cycle time values after a subsequent
Autotune run to follow:

Change Function .0 to
Function .4:

To change to Option Mode:

Change Option 0 to AT Option:

Calculated AT Value Indicates
that the display shows AT value

If AT value is suitable, press P.
(AT value now operational)

If the AT value is not suitable,
press to select suitable

option for example: Option 4
(30 sec)

STEP ACTION DISPLAY

3

4

5

6

7

Press 4 times

Option

(20 seconds)

Press ★

Option (flashing)

Press
Flashing

Press P

OR

0.

4

0.

4

-

9. 8.

4

T E M P

4. 4

56

Alternatively
a. Press P to accept the latest

calculated AT value -7.2 sec
which replaces 9.8 sec as
the operational AT value

b. Press to display current

operational AT value. Then
Press P to retain 9.8 secs

c. Press repeatedly to

select Option from Table 3-4.

Go through steps 2 through 5
once again. This time

is on. 9.8 sec is accepted
from before.

To change to Option Mode:

To display latest calculated AT
value:
For example, 7.2 seconds

STEP ACTION DISPLAY

8

9

10

11

Press ★

Flashing

Press

(Flashing)
shows that
the display

shows latest

AT value

-

7. 2.

4

9. 8.

4

9. 8. 4

57

If the pre-set PID Default values prove to be unsuitable for a
particular application, the following method can be used to establish
new settings which should be acceptable and which can be
adjusted to give optimum control. Other methods may also be used­tuning is a trial and error process.

The first step is to control the system with the instrument in
ON/OFF mode and use these results to calculate the new
parameter values for SP1.

Check that all settings are in Default. If required, range
adjustments should be made first (refer to Section 3.3).

Check that the Parameter Lock is in the Parameter Setting Position
(refer to Figure 3-2 in Section 3.13) and proceed as follows:

1. Adjust Proportioning Time to ON/OFF. (This switches off all
other control terms and sets Hysteresis to 1.25% of full scale.)

2. Enter setpoint temperature.

3. Turn ON and allow process to stabilize. Monitor process
temperature, ideally using a chart recorder, or alternatively by
taking readings from the display at regular intervals, as
frequently as possible. The results should look similar to
Figure 5-3.

5.2 MANUAL TUNING

5.2.1 The Simplified Method

Figure 5-3. Simplified Tuning Method

58

4. Using the figures obtained for the oscillation period (T) seconds
and amplitude (A) degrees (refer to Figure 5-3), the following
parameter values can be calculated:

a. Proportional Time= If 10 seconds or less use the

pulse output model.

b. Proportional Band % = A x 1.5 x 100 Set to next

full scale LARGER %

setting.

c. Derivative (Rate) Time = Set to next

SHORTER
setting.

d. Integral (Reset) Time = T Set to next LONGER

time setting.

NOTE

5.2.2 Alternative Tuning Method

Approach control will be activated in DEFAULT
setting=1.5 x prop. band. If the warm up
characteristic is unacceptable, refer to Section 5.7.

5. Enter these new values and restart the process from cold.

The above settings can be further adjusted to give optimum
performance. Sections 5.3 through 5.8 will provide guidance for
tuning the individual control terms.

If control is not satisfactory, the most likely cause is that the factory
(default) settings are unsuitable for your application. To find the
best settings for your process proceed as follows step by step.

T

20

T

20

Lower setpoint by 10%:

Select setting mode:

STEP ACTION DISPLAY

1

2

Press ★

Press P

Flashing

0.

0

59

Change to Function .4:

Change to Option Mode:

Change to Option 7:

Return to Operating Mode

STEP ACTION DISPLAY

3

4

5

6

7

8

Press

four times

Flashing

Press ★

Flashing

Press

seven times

Flashing

Press P

0.

4

7.

4

0.

4

CONTROL MAY NOW BE WORSE-TEMPERATURE WILL

SWING ABOVE AND BELOW SETPOINT.

Observe this swing carefully and record the difference between the
highest and the lowest reading (A =________) and time in
seconds between consecutive highest readings (T=________)

Locate your sensor in the table below to obtain a sensor factor and
use this with value for A to calculate size of "Proportioning Band"

(Function .5).

Use calculated % value for "Programming Band" width to select
option number in Function .5 table below. When between fixed
values choose next larger option.

Ax3

Sensor Factor

Sensor
Typ e

Pt100
RTD

Sensor
Factor

4 5

10

32

8

J, K, N, Fe Const.

THERMOCOUPLE TYPES

R, S, and B

E

T

%

0.5%Fixed Values 1%

Option No.

106723 45

2% 2.5% 3% 5% 10% 20% *

Using same value for T calculate "Derivative Time" (Function .6).

0.0530 6020105Fixed Values

Option No.

1

12 340 657

SECONDS

*On/Off

60

NOTE

If options 1, 2 or 3 are selected, it is recommended that
you use one of the CN9000A models that provides an
SSD output for SP1. Option 6 is only used for analog
output only (4-20 mA DC or 0-10 VDC output)

STEP

*For other fixed values, refer to Table 3-4.

9

10

Using value for T (time interval between consecutive highest
readings) calculate new value for "Proportioning Time"
(Function .4).

T

20

= seconds

T

10

= seconds

Use calculated value to select option number in Function .4 table
below. When between fixed values choose next shorter option.

10025 50105OutFixed Values

Option No.

1 230 546

SECONDS

*200

*For other fixed values, refer to Table 3-4.

Use calculated value to select option number in Function .6 table
below. When between fixed values choose next shorter option.

*For other fixed values, refer to Table 3-4.

61

Now enter in new option numbers for Functions 4, 5, 6. and 8. P
key is used to enter and exit from setting mode. Option numbers
are on the left of the decimal point. Function numbers are on the
right side of the decimal point. Flashing digits can be raised or
lowered using or keys. Use ★ key to transfer adjustment
from Function to Option column or vice versa.

If this procedure fails to produce good results, repeat observations,
calculations, and check controller setting.

STEP

11

600

180

300

120

60

30

Fixed Values

Option No.

Out

12345 607

SECONDS

*1080

*For other fixed values, refer to Table 3-4.

Using the same value of T, select option number in Function .8
"Integral Time" table below.

5.3 PROPORTIONING TIME

Ideal Setting

The Proportional Time setting determines the cycle rate of the
output device. In the interest of long contact life, this should be the
slowest (longest setting) possible if mechanical relay output is
being used. Otherwise there is no disadvantage in using faster
settings. Refer to Figure 5-4.

Figure 5-4. Proportioning Time

Setting Too Long

(oscillates)

62

In time proportioning control, the proportional band is employed to
smooth out the oscillating characteristic typical of ON/OFF control.

A feature of proportional control is that the system may run at a
slightly different temperature to the set point (Offset), and have a
slower reaction to disturbances. Refer to Figure 5-5.

5.4 PROPORTIONAL BAND

The purpose of the integral time is to automatically correct for
offset errors caused by the introduction of Proportional control. If
incorrectly set, this can cause instability or increase warm up time.

If the Integral Time (constant) is too long, the process will take a
long time to return the temperature to the set point. Conversely, if
the Integral Time is too short, the process temperature oscillates
because the integral action outruns the process. Refer to
Figure 5-6.

Setting too narrow

system oscillates

Setting Ideal Setting too wide slow

warm up and poor control

Setting too short

Ideal Setting Setting too long

Figure 5-5. Proportional Band

5.5 INTEGRAL (RESET) TIME

Figure 5-6. Integral (Reset) Time

63

This feature allows the warm-up characteristics to be tuned
separately from normal running conditions and is particularly useful
for applications where the sensor is some distance from the
heater. The setting determines where the derivative action starts
with respect to set point. The smaller the setting, the closer to
setpoint. Refer to Figure 5-8.

5.6 DERIVATIVE (RATE) TIME

5.7 DERIVATIVE APPROACH CONTROL

Setting too long

Ideal Setting Setting too short

Setting too small

Setting Ideal Setting too large

Derivative enables the controller to shift the proportional band up
or down in an amount proportional to the rate of temperature
change to help the system compensate for rapidly changing
temperature.

The derivative term is added to Proportional Control action to
speed up response to disturbances and to suppress overshoot.
Refer to Figure 5-7. In applications where these two requirements
would need different settings, the use of Derivative Approach
Control for adjusting warm-up characteristics allows the Derivative
setting to be biased in favor of disturuance behavior.

Figure 5-7. Derivative (Rate) Time

Figure 5-8. Derivative Approach Control

64

Ideal settings for these systems are very dependent on the
application; and are often best determined by experiment.

The following general points may prove useful for initial
consideration:

1. A common characteristic is that there is a considerable

difference between the system response to the input of heating
and of cooling energy.

2. In general, both channels can be set independently using the

tuning guidelines for settings for Proportioning Time and
Proportioning Band, and where it is known that one channel
has a dominating and rapid effect on system temperature, the
employment of narrow hysteresis ON/OFF settings for this may
give excellent results.

3. Where both setpoints are required to be set close together

(small deadband), wide proportioning or hysteresis band
settings will overlap allowing simultaneous operation of outputs,
which may give the best overall control.

Where a given application cannot be tuned to give acceptable
results over the required range of process temperatures and
conditions, it is possible that better results may be obtained with
Proportional, Derivative and Approach Control terms only.

5.8 HEATING AND COOLING

5.8.1 General Considerations

5.8.2 Cool Strategy for Heat-Cool Applications

Cool strategy: A change in load causes integral to move the linked
heat and cool prop bands. Refer to Figure 5-9.

65

1 Run Autotune AT: with cooling

disabled (Function .19 Option 0). Set Function .4
normal operating temp. Accept AT Option 15
proportional cycle time

5.8.3 Setting Up Routine for Heat-Cool Control

Tempe rature

setpoint

e.g. 50% cool

no offset

e.g. 30% heat

Time

Cool

prop band

(offset without
cool strategy
integral action)

consistent

deadband/

overlap

exothermic

change in

load causes

integral to
move prop

bands down

Integral

causes prop

bands to

move

Figure 5-9. Cool Strategy

1. Integral causes linked prop bands to move up.

2. Stabilizes eg. 30% heat.

3. Exothermic load change causes integral to move prop bands

down minimizing and disturbance.

4. Minimum offset achieved (4a = offset without cool strategy

integral action).

5. Stabilizes eg. 50% cool.

6. Consistent dead band/overlap throughout.

STEP ACTION PARAMETER

NOTE

SP1 cycle time must be compatible with switching
devices used (SP2 cool output is OFF)

66

2When temperature stable at setpoint:

* Select cool strategy Function .19/
* Select cool prop band option value Option 7

from table nearest to Heat prop band Function .11
value (view Function .5)

* Select cool cycle time option value

nearest to Heat cycle time value (view Function .10
Function .4)

* Adjust SP2 overlap/deadband to 0° Function .2

(zero) (Factory set 5°)

3 Thermal conditions: Run with

normal background/exothermic thermal
conditions, good results should be
achieved and provide the basis for fine
tuning.

4 Further adjustments: Eg. water

cooling. Should oscillation occur try
(in order):

* Double cool prop band value and Function .11

double integral time value Function .8
* Halve cool cycle time Function .10
* Introduce cool overlap by setting Function .2

negative value in Function .2 start (negative)

with a small negative number

5Non-linear cooling

For water cooling above 100°C where Function .10/

flash to steam requires a non-linear Options 13-15

output. Select non-linear ranges in cool

cycle time.

6Fine tuning

If overshoot (into cool) or undershoot

(into heat) occurs, slowly make the

following adjustments, observing the Function .2

results: (negative)
* Increase cool overlap Function .27/
* Apply SP2 cool limit, progressively Option 1, 2..

Also if needed: SP1 heat limit Function .26/

Option 1,2...

STEP ACTION PARAMETER

67

The CN9000A is not designed to allow field calibration.

A one point "Display Offset" can be programmed from the front of
the unit using Function .9 sensor Error Correction (Display Bias).
This function should not be used in normal operation.

Display Bias can be used to correct for small errors in calibration
of a particular thermocouple or the CN9000A. It should never be
used as a fudge factor to account for temperature gradients in a
system.

Note that this is not a true calibration since the entire curve is
shifted, and although the unit can be recalibrated at one point, the
reading can be off at another temperature since the temperature
curve is not exactly linear. Therefore, the Display Bias should be
attempted as close to the desired setpoint temperature possible.

SECTION 6 CALIBRATION

6.2 RECALIBRATING TO A REMOTE STANDARD

6.2.1 Sensor Correction (Function .9)

Figure 6-1. Sensor Error Graph

6.1 DISPLAY OFFSET

To enable the CN9000A calibration to match an external meter
datalogger etc. (i.e. "Reference" reading).

Provides correction at one single temperature.

Temperature That CN9000A Reads

Positive
adjustment

Ideal (i.e.
readings
match)

Negative

adjustment

Temperature

That

‘Reference’

Reads

68

NOTE

Error polarity applies to CN9000A correction
EXAMPLE READS
CN9000A 404°
Ext. Meter 400°

Error +4

Set (-4) correction at Function .9.

6.2.2 Sensor Span Adjust (Function .35)

Figure 6-2. Sensor Span Graph

Steps for providing correction where two temperatures require
differing amounts of adjustment.

1. Choose a temperature near the bottom of the normal operating
range and one near the top.

2. Run at the lower temperature T1 &, note the error E1 between
CN9000A and "Reference" reading.

3. Repeat at upper temperature T2 and note error E2.
Example T1 reads T2 reads
CN9000A 60° 200°
"Reference" 58° 205°

Error E1=+2 E2=-5°

4. Calculate, span adjustment for Function .35

Temperature That CN9000A Reads

Temperature

That

‘Reference’

Reads

Negative

adjustment

Positive
adjustment

Ideal (i.e.
readings
match)

69

Set (-12°) in Function .35°

5. A span error entered in Function .35 immediately changes the

reading. Allow time to stabilize at T2. If an error exists correct
with Function .9. Then check at T1. If an error exists check
readings and calculations, repeat if necessary.

E2-E1

T2-T1

Formula: Function .35 =

x span (as Function .24)

(-5°)-(+2°)

200°-60°

Example: Function .35 =

x 250° (Function .24 span)

-

7

140

Function .35

x 250 = -12°

70

NOTES

SECTION 7 INTERNAL JUMPER CHANGES FOR 115/230
VAC AND 2-WIRE/3-WIRE RTD CONVERSIONS

Input power conversion requires changes on the Main PC Board
(PCB). RTD 2-wire to 3-wire conversions also requires jumper
changes on the Main PCB. THESE MODIFICATIONS SHOULD BE
MADE ONLY BY A QUALIFIED TECHNICIAN.

V

oltage conversion (from 115VAC to 230VAC or vice versa) IS

allowed in the following models:

CN9111/CN9111A CN9211/CN9211A BD9011/BD9011A
CN9112/CN9112A CN9212/CN9212A BD9012/BD9012A
CN9121/CN9121A CN9221/CN9221A BD9021/BD9021A
CN9122/CN9122A CN9222/CN9222A BD9022/BD9022A
CN9131/CN9131A CN9231/CN9231A

V

oltage conversion IS NOT allowed in the following models under
any circumstances. Doing so, will result in permanent damage to
the controller.

CN9141/CN9141A CN9241/CN9241A
CN9141-230V/CN9141A-230V CN9241-230V/CN9241A-230V
CN9151/CN9151A CN9251/CN9251A
CN9151-230V/CN9151A-230V CN9251-230V/CN9251A-230V
BD9041/BD9041A
BD9041-230V/BD9041A-230V
BD9051/BD9051A
BD9051-230V/BD9051A-230V

7.1 TO REMOVE MAIN PC BOARD

Remove the controller from the panel (if installed). The Main PC
Board (PCB) must next be removed before any modifications can
be made. Refer to Figure 7-1 and proceed as follows:

1. Remove the rear socket on the controller.

2. Separate the output module from the controller body by gently

prying both slots in the rim of the cover with a screwdriver.
Cover rim will bow out to release module tabs.

71

72

3. Gently slide the output module from the housing. Next remove

the Main PCB from the controller. This can be done by carefully
taping module cover on table top (as shown below) to release
the PC board. Do not use pliers on protruding board
cladding. Carefully pull out the board to avoid damaging
components.

7.2 115/230VAC VOLTAGE CONVERSION

Figure 7.1. Removing the Main PC Board

Remove the Main PC Board from the controller using the steps
described in Section 7.1. Lay the PCB on the workbench with
transformer side down.

To convert the controller from 115 VAC to 230 VAC, refer to Figure
7-2 and proceed as follows:

1. Remove jumpers LK5 and LK3.

2. Install 1 jumper across the sockets marked "LK4"

To convert from 230 VAC to 115 VAC. refer to Figure 7-2 and
proceed as follows:

1. Remove jumper LK4.

2. Install 1 jumper across LK3 and one across LK5 (19 AWG or 22
SWG).

CN9000A board

MODULE COVER

ANALOG

PCB

OUTPUT
MODULE

73

To install a module with a 1A Triac SSR, 4-20mA DC or 0-10VDC
output will require a controller that has a 5VDC SSD (DC Pulse)
on the first output-; namely the OMEGA model CN9121A,
CN9122A, CN9221A or CN9222A controllers.

The BD9031A, BD9041A, or BD9051A socket can then be plugged
on the back of the unit in place of the standard socket used for
wiring. Refer to Figure 8-1 for dimensions.

7.3 2-WIRE/3-WIRE RTD CONVERSION

7.4 INSTALLING THE TRIAC, 4-20mA AND 0-10VDC
OUTPUTS OPTIONS

Use of a 3-wire RTD reduces measurement error when the sensor
is more than 30 feet (10 meters) from the controller. Note that
conversion to a 3-wire RTD inhibits subsequent selection and use
of thermocouples.

To convert from an input of a 2-wire RTD sensor to a 3-wire RTD,
refer to Figure 7-2 and proceed as follows:

1. Cut PC Board cladding where marked with an `X' (Fig 7-2).

2. Solder a wire jumper across LK2 and LK1.

Figure 7-2. Voltage and 2-Wire/3-Wire

RTD Conversions

74

Hardware required to make units is as follows:

CN9121A + BD9031A makes a CN9131A
CN9121A + BD9041A makes a CN9141A
CN9121A + BD9051A makes a CN9151A
CN9221A + BD9031A makes a CN9231A
CN9221A + BD9041A makes a CN9241A
CN9221A + BD9051A makes a CN9251A

NOTE

230VAC units use different modules for BD9041A or BD9051A

75

POWER; Dual 115/230V ±15% 50/60 Hz 5 VA,

Factory set, jumper changeable

OUTPUT MODULES
RELAY ON OUTPUT 1: SPDT relay, rated 5A resistive at

250V continuous use

†

RELAY ON OUTPUT 2: SPDT relay, rated 3A resistive at

250V continuous use

†

NOTES

Dual relays are the standard output modules (CN9111A). The relay
ratings shown are conservative. Although the Output 1 relay is
capable of handling a current of 10A and the Output 2 relay a
current of 5A, the life of the relays will be considerably reduced if
the controller is used continuously (24 hours/day) at or near 10A
(Output 1) or 5A (Output 2).

†

Using the controller in an elevated ambient temperature, or with a
slightly inductive load, also derates the relays. In those situations,
the rating of Output 1 is 5A and Output 2 is 3A.

OPTIONAL OUTPUTS
5VDC SSD: Non-isolated 5 VDC pulses 25 mA for

driving an external DC controlled solid
state relay

1A TRIAC: 1A/264V 100 VA max, SPST
4-20 mA: Isolated, 500 Ω maximum
0-10 VDC: Isolated, 20 mA maximum
ACCURACY & RANGES
CALIBRATION
ACCURACY: ±0.25% of range ±1°C (±0.5°C in

Hi-res) plus linearity tolerance

CONTROL STABILITY: Typically ±0.15% of full scale,

dependent on application

TEMPERATURE
INPUT RANGE: T/C Input-Table 8-1 Millivolt Input-

Table 8-2

LINEARITY
TOLERANCE: T/C Input-Table 8-1 Millivolt Input-

Table 8-2

SECTION 8 SPECIFICATIONS

TABLE 8-1

TEMPERATURE DISPLAY-LINEARITY AND DEFAULT

SETTINGS

SENSOR LINEARIZED LINEARITY DEFAULT

TYPE RANGE* TOLERANCE ± SETPOINT ADJ*

J0 to 800°C 1°C 400°C

K0 to 1200°C 1°C 400°C
N0 to 1200°C 1°C 400°C
R0 to 300°C 5°C 1600°C

300 to 1600°C 2°C

S0 to 300°C 5°C 1600°C

300 to 1600°C 2°C

T -200 to 250°C 2°C 250°C
E0 to 600°C 1°C 500°C
B 300 to 1800°C 6°C 1600°C

J DIN 0 to 800°C 1°C 400°C

Pt100 RTD -200 to 250°C 0.25°C 200°C

250 to 400°C 0.5°C

*Maximum display in °F is 1999 for all thermocouple types

TABLE 8-2

LINEAR PROCESS INPUT DISPLAY RANGES

76

LINEARITY

RANGE LINEAR INPUT DISPLAY TOLERANCE*

1 0-20 mV 0-100 ±1.5%
2 4-20 mV 0-100 ±1.5%
3 0-20 mV 0-1000 ±1.5%
4 4-20 mV 0-1000 ±1.5%
5 0-20 mV 0-2000 ±1.5%

*Minimum impedance: 100 k ohms
Linear Process input ranges are selectable in Function .16.

77

SAMPLING TIME: 3 samples per second. Re-zero of CJC

and auto calibrate every 5 seconds

TEMPERATURE
COEFFICIENT: <150ppm/°C of max. linearized range

(typical)

REFERENCE
CONDITIONS: 22°C ±2°C, 115/230 V ±15% after 30

minutes settling time

SENSORS
INPUT TYPES: Thermocouple: J, K, E, R, S, N, B, J DIN:

RTDs: 2-wire Pt-100, 3-wire Pt100
0 to 20 mV, 4 to 20 mV, user selectable

EXTERNAL
RESISTANCE (TC): 100 ohms maximum

COLD JUNCTION
COMPENSATION: 0.05°/°C (20:1)

BURNOUT
PROTECTION: Fault display, upscale (downscale is key

selectable)

COMMONMODE
REJECTION: 140 dB, 240 V, 50/60 Hz

NORMAL MODE
NOISE REJECTION: 60 dB, 50 Hz

78

GENERAL

WEIGHT: 13.4 oz (380 g)

AMBIENT
TEMPERATURE: 5° to 49°C (40° to 120°F)

NOISE IMMUNITY: Excellent. Normal control restored within

a short time after major power
disturbance and "brown outs".

DATA RETENTION: 10 years with instrument unpowered

SAFETY
STANDARDS: Designed in accordance with: UL 873

Industrial Temperature Controllers, CSA
C22.2/24-1981, VDE 0411 Class 1;
Moldings in flame retardant
polycarbonate

DEGREE OF
PROTECTION: Designed in accordance with:

IEC 529:1976 BS 5490:1977; Bezel
assembly IP-54 "Protected against
splashing water and dust"; Case inside
panel IP-30 "Protected against >2.5 mm
dia. objects"

PANEL CUTOUT:

1

/

16

DIN or 1,772" square (45 mm

square). DIN 43700

DIMENSIONS
WITHOUT POWER
SOCKET: 1.89" x 1.89" x 0.5"

(48 x 48 x 13 mm) bezel;

4.4" (115 mm) depth behind panel.

See Figure 2-1 for complete diagram
with dimensions.

(See Figure 8-1 for dimensions with
power socket)

79

DIMENSIONS
WITH POWER SOCKET: See Figure 8-1 below.

Figure 8-1. Dimensions with the Power Socket

80

APPENDIX A

FUNCTION QUICK REFERENCE GUIDE

STANDARD FUNCTIONS (.0 -.25)

OPERATOR ADJUSTMENTS

.0 Operating Modes (Autotune/Auto-manual)
.1 Manual Reset
.2 Setpoint 2 Adjust
.3 Setpoint 1 Lock

TUNING

.4 Cycle Time/On-off (Output 1)
.5 Proportional Band/Deadband (Output 1)
.6 Derivative Time/Rate (Output 1)
.7 Derivative Approach Control (Output 1)
.8 Integral Time (Output 1 )
.9 Sensor Offset (Calibration)
.10 Cycle Time/On-off (Output 2)
.11 Proportional Band/Deadband (Output 2)
.12 Loop Break Alarm Time

SPECIAL SETUP FUNCTIONS

.13 Activate Advanced Functions .26 -.50
.14 (Not Used)
.15 Resetting Functions .0 - .24 to Default Settings

INITIAL CONFIGURATION

.16 Input Sensor Select and Range Table
.17 Negative Temperatures
.18 Display Resolution (1 or 0.1 Degree)
.19 Setpoint 2 Operation Selection
.20 Sensor Break Protection (Output 1)
.21 Sensor Break Protection (Output 2)
.22 °C/°F Selection
.23 Software Version Number
.24 Upper Setpoint Limit (Span)
.25 (Not Used)

81

APPENDIX A (Cont’d)

FUNCTION QUICK REFERENCE GUIDE

ADVANCED FUNCTIONS (.26 -.50)

INITIAL CONFIGURATION

.26 Heating Output Limit (Output 1)
.27 Cooling Output Limit (Output 2)
.28 Output 1 Direct/Reverse (Heat/Cool)
.29 Output 1 LED Operation
.30 Output 2 Direct/Reverse
.31 Output 2 LED Operation
.32 Error Indication Resolution
.33 Temperature Display Sensitivity
.34 Derivative Polling Ratio
.35 Sensor Span Adjust (Calibration)
.36 Limit (Latching) Control (Output 2)
.37 (Not Used)

DIAGNOSTICS

.38 Resets Functions .39 to .42
.39 Read Temperature Variance
.40 Read Maximum Temperature
.41 Read Minimum Temperature
.42 Read Duty Cycle Monitor
.43 Read Autotuning Overshoot 1
.44 Read Autotuning Overshoot 2
.45 Read Autotuning Undershoot
.46 Read Quarter Cycle Time 1
.47 Quarter Cycle Time 2
.48 Quarter Cycle Time 3
.49 Quarter Cycle Time 4
.50 (Not Used)

82

Mount controller in panel.
Attach T/C & power leads in
accordance with the diagram
on back of controller. Note use
115 VAC or 240 VAC
depending on which power
level is required for the
controller you ordered.
Controller goes through self
check routine. All segments
light up momentarily.

Set the T/C type if no sensor
has been selected previously
the controller will display
Function .16, option zero. The
zero will flash.

Set, e.g., T/C Type K sensor
(Option 2, see page 31)

Enter T/C type in memory
display now reads sensor
temperature, e.g., 23°C

Read setpoint temperature
For example 0°C.

APPENDIX B

QUICK STARTUP

STEP ACTION DISPLAY

1

2

3

4

Sample case - Type K thermocouple input, autotuned to 147°C:

Flashing

Press , twice

Press P, once

Press ★

1 8 8 8

0.

1 6

2.

1 6

2 3

0

NOTE

If the display does not read 0.16 with the zero flashing, then the
unit has already been programmed with a sensor type. Refer to
Section 3.7 and step through to Function .16 and set proper
sensor type. Note other functions may have to be changed as well.

83

Change setpoint temperature.
Hold ★ button while pressing
"up arrow" ( ) to increase
setpoint, or alternately "down
arrow" ( ) to decrease (Note
that the digits will change
while arrows are held, slowly
at first, then more quickly).

For example, the setpoint is
set for 147°

Enter setpoint in memory and
display process temperature,
e.g., 25°C.

Change controller parameters
by accessing Functions. For
example, Function .0
(flashing) and Option 0 are
displayed.

To change Option 0 to Option
1 (for autotuning). Enable
change of option.

Increase Option 0 to Option 1
to enable autotuning.

Start autotuning. Display will
alternately flash "AT" and the
process temp until Autotuning
is finished. Unit will then read
actual process temperature.

APPENDIX B (cont’d)

QUICK STARTUP

STEP ACTION DISPLAY

5

6

7

8

9

10

Press ★, hold

Press ,

Press ★

Release or

Press P

Flashing

Press ★

Flashing

Press once

Press P

1 4 7

2 5

0.

0

0.

0

1.

0

A T

2 6

84

NOTES

WARRANTY

OMEGA warrants this unit to be free of defects in materials and workmanship and to give satisfactory service
for a period of 37 months from date of purchase. OMEGA Warranty adds an additional one (1) month grace
period to the normal three (3) year product warranty to cover handling and shipping time. This ensures
that our customers receive maximum coverage on each product. If the unit should malfunction, it must be
returned to the factory for evaluation. Our Customer Service Department will issue an Authorized Return (AR)
number immediately upon phone or written request. Upon examination by OMEGA, if the unit is found to be
defective it will be repaired or replaced at no charge. However, this WARRANTY is VOID if the unit shows
evidence of having been tampered with or shows evidence of being damaged as a result of excessive
corrosion; or current, heat, moisture or vibration; improper specification; misapplication; misuse or other
operating conditions outside of OMEGA's control. Components which wear or which are damaged by misuse
are not warranted. These include contact points, fuses, and triacs.

We are glad to offer suggestions on the use of our various products. Nevertheless, OMEGA
only warrants that the parts manufactured by it will be as specified and free of defects.

OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND
WHATSOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF TITLE AND ALL IMPLIED
WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A
PAR TI CULAR PURPOSE ARE HEREBY DISCLAIMED.

LIMITATION OF LIABILITY: The remedies of buyer set forth herein are exclusive and the total
liability of OMEGA with respect to this order, whether based on contract, warranty,
negligence, indemnification, strict liability or otherwise, shall not exceed the purchase price
of the component upon which liability is based. In no event shall OMEGA be liable for
consequential, incidental or special damages.

Every precaution for accuracy has been taken in the preparation of this manual; however, OMEGA
ENGINEERING, INC. neither assumes responsibility for any omissions or errors that may appear nor
assumes liability for any damages that result from the use of the products in accordance with the information
contained in the manual.

SPECIAL CONDITION: Should this equipment be used in or with any nuclear installation or activity, buyer
will indemnify OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the
use of the equipment in such a manner.

RETURN REQUESTS / INQUIRIES

Direct all warranty and repair requests/inquiries to the OMEGA ENGINEERING Customer Service
Department. Call toll free in the USA and Canada: 1-800-622-2378, FAX: [phone]; International: 203­359-1660, FAX: [phone].

BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, YOU MUST OBTAIN AN AUTHORIZED RETURN
(AR) NUMBER FROM OUR CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID PROCESSING
DELAY'S). The assigned AR number should then be marked on the outside of the return package and on any
correspondence.

FOR WARRANTY RETURNS, please have FOR NON-WARRANTY REPAIRS OR
the following information available BEFORE CALIBRATION, consult OMEGA for current
contacting OMEGA: repair/calibration charges. Have the following

1. P.O. number under which the product information available BEFORE contacting
was PURCHASED, OMEGA:

2. Model and serial number of the product 1. P.O. number to cover the COST of the
under warranty, and repair/calibration,

3. Repair instructions and/or specific 2. Model and serial number of product, and
problems you are having with the product. 3. Repair instructions and/or specific problems you are

having with the product.

OMEGA's policy is to make running changes, not model changes, whenever an improvement is possible.
This affords our customers the latest in technology and engineering.
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 1994 OMEGA ENGINEERING, INC. All rights reserved. This documentation may not be copied,
photocopied, reproduced, translated, or reduced to any electronic medium or machine-readable form, in
whole or in part, without prior written consent of OMEGA ENGINEERING, INC.

Where Do I Find Everything I Need for

Process Measurement and Control?

OMEGA...Of Course!

TEMPERATURE

Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies
Wire: Thermocouple, RTD & Thermistor
Calibrators & Ice Point References
Recorders, Controllers & Process Monitors
Infrared Pyrometers

PRESSURE/STRAIN FORCE

Transducers & Strain Gauges
Load Cells & Pressure Gauges
Displacement Transducers
Instrumentation & Accessories

FLOW/ LEVEL

Rotameters, Gas Mass Flowmeters & FlowComputers
Air Velocity Indicators
Turbine/ Paddlewheel Systems
Totalizers & Batch Controllers

pH/CONDUCTIVITY

pH Electrodes, Testers & Accessories
Benchtop/ Laboratory Meters
Controllers, Calibrators, Simulators & Pumps
Industrial pH & Conductivity Equipment

DATA ACQUISITION

Data Acquisition and Engineering Software
Communications-Based Acquisition Systems
Plug-in Cards for Apple, IBM & Compatibles
Datalogging Systems
Recorders, Printers & Plotters

HEATERS

Heating Cable
Cartridge & Strip Heaters
Immersion & Band Heaters
Flexible Heaters
Laboratory Heaters

ENVIRONMENTAL MONITORING AND CONTROL

Metering & Control Instrumentation
Refractometers
Pumps & Tubing
Air, Soil & Water Monitors
Industrial Water & Wastewater Treatment
pH, Conductivity & Dissolved Oxygen Instruments

DM00020D M1191A/0704

✓
✓
✓
✓
✓

✓
✓
✓
✓

✓
✓

✓
✓
✓
✓
✓

✓
✓
✓
✓
✓

✓
✓
✓
✓

✓
✓
✓
✓

✓
✓
✓
✓