Omega Cn9000a series User manual

P-28

P

1⁄16 DIN Autotune

emperature Controllers

⻬Auto/Manual Output Control

⻬Field Replaceable Output Modules

Specifications

Accuracy: ±0.25% FS ±1°C (0.5°C in 0.1° resolution mode);

30-minute warm-up; see also linearized tolerance from

range chart

Control Stability: ±0.15% FS, typical

Sample Rate: 3 per second

emperature Coefficient: ≤150 ppm/°C max

External Resistance: 100 Ω max

Cold Junction Compensation: 0.05°/degree ambient typical

Display: 31⁄2digit green LED; 10 mm (0.4") high; 1 or 0.1°

resolution; error indication, 3 deviation-from-setpoint indicators

Manual Reset: PD, proportional and on/off control;

set as degrees, deviation from setpoint is 1

Power: 24 Vac, 115 Vac, 230 Vac, ±15%, 50 to 60 Hz

Power Consumption: 6 VA

Output 1 Relay: SPDT relay, 5 A @ 250 Vac

Output 2 Relay: SPDT relay, 3 A @ 250 Vac

DC Pulse Output: Non-isolated 5 Vdc Pulse for driving

external dc solid state relay

Common Mode Noise Rejection: 140 dB, 240 Vac, 50/60 Hz

Normal Mode Noise Rejection: 60 dB, 50 Hz

Ambient Operating Range: 4 to 50°C (40 to 122°F)

Dimensions: 48 H x 48 W x 13 mm D bezel

(1.89 x 1.89 x 0.5"); 115 mm (4.5") depth behind panel;

154 mm (6.1") with triac voltage or current output

Panel Cutout: 45 mm2(1.772"); 1⁄16 DIN

Weight: 0.38 kg (0.84 lb)

OMEGACARESM extended warranty pro ram is available for models

shown on this pa e. Ask your sales representative for full details

when placin an order. OMEGACARESM covers parts, labor, and

equivalent loaners.

Input Linearized Range Linearized

ype (Units are °F/°C Switchable) olerance

32 to 1470°F 0 to 800°C 1°C/2°F

32 to 1999°F 0 to 1200°C 1°C/2°F

-199 to 500°F -199 to 250°C 2°C/4°F

32 to 1100°F 0 to 600°C 1°C/2°F

32 to 572°F 0 to 300°C 5°C/9°F

572 to 1999°F 300 to 1600°C 2°C/4°F

32 to 572°F 0 to 300°C 5°C/9°F

572 to 1999°F 300 to 1600°C 2°C/4°F

1000 to 1999°F 500 to 1800°C 6°C/11°F

32 to 1999°F 0 to 1200°C 1°C/2°F

L (J DIN) 32 to 1470°F 0 to 800°C 1°C/2°F

-199 to 750°F -199 to 400°C 0.5°C/0.9°F

To Order (Spec fy Model Number)

Model No. Input Output 1 Output 2

CN9110A 209 R R Relay –

CN9111A 230 elay elay

CN9112A 230 elay Pulse

CN9120A 209 Pulse –

CN9121A 230 Pulse elay

CN9122A 230 Pulse Pulse

CN9131A 293 1 A SS elay

CN9141A 293 4 to 20 mA elay

CN9151A 293 0 to 10 Vdc elay

CN9210A 209 elay –

CN9211A 230 elay elay

CN9212A 230 elay Pulse

CN9220A 209 Pulse –

CN9221A 230 Pulse elay

CN9222A 230 Pulse Pulse

CN9231A 293 1 A SS elay

CN9241A 293 4 to 20 mA elay

CN9251A 293 0 to 10 Vdc elay

Model No. Description

BDual relay, field installable module

BD9021A Pulse/relay, field installable module

BD9031A 1 A SS and relay,

field installable module

BD9041A†4 to 20 mA and relay,

field installable module

BD9051A†0 to 10 Vdc and relay,

field installable module

BD9010A Relay output board

BD9012A Relay/pulse field installable module

BD9022A Dual pulse field installable module

Replacement Output Modules

Input ypes and Ranges

3-wire

TD

T/C,

2-wire

TD

†To order “230 Vac” powered boards, add suffix “-230V” to model

number, no additional char e.

CN9000A Series

Starts at

$209

CN9110A, $209.

MOST POPULAR MODELS HIGHLIGHTED!

115 V Models

Only

Comes complete with operator’s manual, mountin bracket and wirin terminals.

115 Vac models are UL reco nized. UL not ava lable for 230 Vac models.

To order units with “230 Vac” power, add suffix “-230VAC” to model,

no additional char e.

To order units with “24 Vac” power, add suffix “-24VAC” to model,

no additional char e.

Order ng Examples: CN9121A, autotune controller, pulse output

(output 1) and relay output (output 2),

OCW-2

US

For Complete Product

I formatio Visit

omega.com/c 9000a

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omega.com

e-mail: [email protected]

For latest product manuals:

omegamanual.info

C9000A SERIES

Autotune Temperature Controller

Shop online at

®

User’s Guide

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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

2

5

7

9

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16

18

19

20

21

22

23

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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

37

38

39

44

45

46

47

48

49

50

51

52

53

54

57

58

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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

63

64

65

67

68

71

72

73

75

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iv.

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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-Integral-

Derivative), 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.

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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

/2digit 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 non-

volatile 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

1Thermocouple

2-Wire RTD, or

Linear Millivolt Signal

23-Wire RTD

CODES for Output

No. 2

13A Mechanical

Relay

25VDC SSD*

CODES for Output No. 1

15A Mechanical Relay

25VDC SSD*

31A Triac SSR

44-20 mA DC

50-10 VDC

A

CN9

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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

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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

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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 (203) 359-1660.

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

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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 1/16 DIN 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

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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

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

Designations

TERMINAL DESIGNATIONS AND SIGNAL CONNECTIONS

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

2AC Power, Neutral

3RTD (black, if 3-wire RTD) (For T/C, do not use terminal.)

4Thermocouple (-); or RTD (black if 3-wire RTD); or Neg.

Voltage

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

Voltage

6Output 2 (SP2) Mechanical Relay Normally Open (N.O.)

7Output 2 (SP2) Mechanical Relay Common (C.) or 5V Pulse (-)

8Output 2 (SP2) Mechanical Relay Normally Closed (N.C.);

or 5V Pulse (+)

9Output 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

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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

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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

LN

COOLING WATER

3A (max)

SOLENOID

VALVE

LOAD

SSR output SP1

DC

INPUT

SSR

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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

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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).

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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

★

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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.

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Omega CN9000A Series User manual

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