Emerson IM-106-4050 User Manual

Instruction Manual

IM-106-4050 Original Issue March 2006

OxyBalance

Oxygen Display and Averaging System

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Instruction Manual

IM-106-4050 Original Issue March 2006

OxyBalance Oxygen Display

and Averaging System

Table of Contents

Essential Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i

Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii

Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii

Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii

SECTION 1 Description

SECTION 2 Installation

SECTION 3 Setup

SECTION 4 Calibration

Component Checklist. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Part Numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

System Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

OxyBalance System Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Physical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

System Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Wiring Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Trend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

OxyBalance Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

SECTION 5 Maintenance and Service

SECTION 6 Troubleshooting

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

PanelView Plus 600. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

PanelView Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

PanelView Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

MicroLogix 1200 Programmable Controllers . . . . . . . . . . . . . . . . . . . . 5-6

PLC Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

PLC Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

I/O Module Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9

I/O Module Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Probe Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

TOC-1

Instruction Manual

IM-106-4050 Original Issue March 2006

OxyBalance Oxygen Display

and Averaging System

SECTION 7 Recommended Spare Parts

SECTION 8 Optional Accessories

APPENDIX A Safety Data

SECTION B Returning Equipment to the Factory

Spare Parts Listing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

Returning Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

TOC-2

Instruction Manual

IM-106-4050 Original Issue March 2006

OxyBalance Oxygen Display

and Averaging System

OxyBalance

Oxygen Display and Averaging System

READ THIS PAGE BEFORE PROCEEDING!

ESSENTIAL INSTRUCTIONS

Emerson process Management designs, manufactures and tests its products to meet many national and international standards. Because these instruments are sophisticated technical products, you MUST properly install, use, and maintain them to ensure they continue to operate within their normal specifications. The following instructions MUST be adhered to and integrated into your safety program when installing, using, and maintaining Rosemount Analytical products. Failure to follow the proper instructions may cause any one of the following situations to occur: Loss of life; personal injury; property damage; damage to this instrument; and warranty invalidation.

• Read all instructions

product.

• If you do not understand any of the instructions, contact your Rosemount Analytical representative for clarification.

• Follow all warnings, cautions, and instructions supplied with the product.

• Inform and educate your personnel in the proper installation,

operation, and maintenance of the product.

• Install your equipment as specified in the Installation Instructions of the appropriate Instruction Manual and per applicable local and national codes. Connect all products to the proper electrical and

pressure sources.

• To ensure proper performance, use qualified personnel operate, update, program, and maintain the product.

• When replacement parts are required, ensure that qualified people use replacement parts specified by Rosemount Analytical. Unauthorized parts and procedures can affect the product's performance, place the safe operation of your process at risk, and VOID YOUR WARRANTY. Look-alike substitutions may result in fire, electrical hazards, or improper operation.

• Ensure that all equipment doors are closed and protective covers

are in place, except when maintenance is being performed by qualified persons, to prevent electrical shock and personal injury.

prior to installing, operating, and servicing the

marked on and

to install,

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The information contained in this document is subject to change without notice.

OxyBalance Oxygen Display

Instruction Manual

IM-106-4050 Original Issue

and Averaging System

If a Model 275/375 Universal HART® Communicator is used with this unit, the software within the Model 275/375 may require modification. If a software modification is required, please contact your local Emerson process Management Service Group or National Response Center at 1-800-433-6076 or 1-888-433-6829.

March 2006

PREFACE The purpose of this manual is to provide information concerning the

components, functions, installation and maintenance of the OxyBalance Oxygen Display and Average System.

Some sections may describe equipment not used in your configuration. The user should become thoroughly familiar with the operation of this module before operating it. Read this instruction manual completely.

DEFINITIONS The following definitions apply to WARNINGS, CAUTIONS, and NOTES

found throughout this publication.

SYMBOLS

Highlights an operation or maintenance procedure, practice, condition, statement, etc. If not strictly observed, could result in injury, death, or long-term health hazards of personnel.

Highlights an operation or maintenance procedure, practice, condition, statement, etc. If not strictly observed, could result in damage to or destruction of equipment, or loss of effectiveness.

NOTE

Highlights an essential operating procedure, condition, or statement.

EARTH (GROUND) TERMINAL

PROTECTIVE CONDUCT OR TERMINAL

RISK OF ELECTRICAL SHOCK

WARNING: REFER TO INSTRUCTION MANUAL

NOTE TO USERS

The number in the lower right corner of each illustration in this publication is a manual illustration number. It is not a part number, and is not related to the illustration in any technical manner.

Instruction Manual

IM-106-4050 Original Issue March 2006

Section 1 Description

Component Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-1

Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-1

System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-2

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 1-5

OxyBalance Oxygen Display

and Averaging System

COMPONENT CHECKLIST

A typical Rosemount Analytical OxyBalance Oxygen Display and Averaging System package should contain the items shown in Figure 1-1.

PART NUMBERS Use the part numbers listed in Table 1-1 to verify your OxyBalance system

part number. Copy the part number and serial number from the OxyBalanceunit into the chart on the back cover of this manual. Refer tothis complete part number for any correspondence with Emerson Process Management.

Table 1-1. OxyBalance System Part Numbers

Figure 1-1. Typical System Package

Part Number Description

6A00203G01 1-4 probes, NEMA 4X enclosure

6A00203G02 5-8 probes, NEMA 4X enclosure

6A00203G03 1-4 probes, plate mounted

6A00203G04 5-8 probes, plate mounted

Ins

tru

ction

-10

Man

6-34 D ecem

ual

er2005

.4.2

OXYMITTER4000

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l y

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Analytical

1. Instruction Manual

2. OxyBalance Oxygen Display and Averaging System

38370006

OxyBalance Oxygen Display and Averaging System

Instruction Manual

IM-106-4050 Original Issue

March 2006

SYSTEM OVERVIEW

General The OxyBalance is a display and averaging system that augments the

Oxymitter O Rosemount, Westinghouse, or other O up to 4 additional programmable averages (again 4-20 mA). The OxyBalance system also displays the individual and averaged outputs on a color touch screen graphic panel. Trend screens, bar graphs (individual probes only), and alarming indications are provided when a probe goes off line.

The OxyBalance system replaces much of the functionality of older averaging systems offered by Westinghouse and Rosemount - the Control Room Electronics (CRE), 1500 Controller-based averaging systems, and the Veritrak-based 1290 systems. It should be noted, however, that the heater control and signal conditioning for each individual probe is executed within separate electronics for each probe. Unlike past averaging systems, and most current competitive averaging systems, there is no component failure in the OxyBalance system that will cause the loss of individual probe signals.

The OxyBalance system senses 4-20 mA inputs automatically. Averages are very easy to set up. Any probes that may fail will default to a 3.5 mA signal level, indicate in red, and the OxyBalance system will remove these probes from the average. Likewise, probes that are in calibration will indicate blue, and provide a contact closure to the OxyBalance system to remove them from the average while calibrating.

probe product line. It receives up to (8) 4-20 mA signals from

probes, and calculates and transmits

OxyBalance System Features

Trends offer adjustable scaling, three time spans (5 min., 8 hrs., and 24 hrs.), and panning capability back and forth in history.

The standard OxyBalance system includes the following features:

• Graphically displays and trends from 1 to 8 O

• Probe inputs may be from Rosemount Analytical, Westinghouse or any competitive O

• Generates up to four 4-20 mA signals as programmable averages.

• Failed or calibrating probes are automatically removed from the average

• Individual probe readings remain autonomous and are unaffected by any potential failure of the OxyBalance system.

• Variable time scale trends for each individual probe value, as well as for up to 4 averages.

• Password protection for set up menus.

probe with a 4-20 mA signal output.

measurements.

1-2

Instruction Manual

IM-106-4050 Original Issue March 2006

OxyBalance Oxygen Display

and Averaging System

Physical Description Aside from the PanelView Plus 600, the OxyBalance system consists of

iadditional components mounted on three DIN rails. The main components are shown in Figure 1-2.

PanelView Plus 600

The PanelView Plus 600 is the touch screen interface located on the front of the OxyBalance system, all probe readings and averages are displayed through this interface. There is also a power cord and communications cord that connect to this module.

MicroLogix 1200 Programmable Logic Controller

PLC

The PLC process the raw data received by the OxyBalance. The processed data is transmitted to the PanelView Plus 600, where it is displayed on the touch screen interface.

I/O Modules

Also known as the expansion I/O, these modules act as part of the controller system and are located on the right side of the PLC unit.

Figure 1-2. OxyBalance Components

Power

Terminals

Input Terminals

This row of terminals receives the 4-20 mA signals from the O

MicroLogix 1200

Programmable

Logic Controller

01 2 3 5 6 8 91011 1213

47IN012356 89

OUT

POWER

RUN

FAULT

FORCE

COMM0

DCOMM

I/O Modules

probes.

PLC

Failure

Terminals

Failure/

Warning

Terminals

In Cal

Terminals

PanelView

Plus 600

Signal Pass

Through Terminals

Input

Terminals

Output

Terminals

38370016

1-3

OxyBalance Oxygen Display and Averaging System

Signal Pass Through Terminals

The pass through terminals are located on the input terminals. These terminals provide connection points for passing on the incoming O other devices.

Output (Average) Terminals

Instruction Manual

IM-106-4050 Original Issue

March 2006

signal to

These terminals provide a connection point for the average O signals.

Failure / Warning Terminals

These terminals provide connection points for the output signal warning and failure contacts.

In Cal Terminals

These terminals provide connection points for In Cal signals from the individual oxygen probes. When a probe is in calibration, it is removed from any average calculations.

Power Terminals

This terminal provides wire contacts for power distribution in the OxyBalance system.

OxyBalance operating specifications are listed in Table 1-2.

% 4-20 mA

1-4

Instruction Manual

IM-106-4050 Original Issue March 2006

OxyBalance Oxygen Display

and Averaging System

SPECIFICATIONS Specifications for the OxyBalance system are listied in Table 1-2.

Table 1-2. OxyBalance Specifications

SPECIFICATIONS

Ambient Environment

Temperature specification 23oF to 149o F (-5oC to 65oC)

Ambient temperature effect on electronics Less than .01% of reading per 10oC

Vibration IEC 68-2-6 and ISA S37.3

Shock IEC 68-2-31 and ISA S37.3

Enclosure NEMA 4X

Area Classification General Purpose

Power Requirements 100-240 VAC, 50/60 Hz MicroLogix 1200

Resistive Load on Current Output 0 to 500 Ohms (includes wire resistance)

Input Impedance for Current Terminal 275 Ohms

PanelView Plus 600

Minimum On-State Current 2.0 mA at 10V dc

Nominal On-State Current 8.9 mA at 24V dc

Maximum On-State Current 12. mA at 30V dc

Current per Group Common 8A

240V ac (Maximum Volts) 2.5A

120V ac (Maximum Volts) 2.5A

125V dc (Maximum Volts) 1.0A (Amperes Continuous)

24V dc (Maximum Volts) 2.0A (Amperes Continuous)

I/O

Signal Inputs 4-20 mA (qty. 1 to 8 O2 probes)

Signal Outputs 4-20 mA (qty, 1 to 8 pass through each probe, qty. 4 programmable averages)

Signal Output Resolution (for averages) 12 bit

Signal Output Resistive Load Less than 500 ohms

Discrete Inputs "IN CAL" (qty. 2 to 8 from individual probes)

Relay Outputs

Architecture

Logic 4 programmable averages from 2-8 probes

Individual probes removed from average if

Signal Security

Personnel Security Password protection configuration changes in programmable averages. Color Graphic Display

Size 6" diagonal

Type Color Active Matrix, TFT LCD

Resolution 320 by 240 min. Touch screen operator interface

(1)

(2)

(Amperes Continuous)

(2)

(Amperes Continuous)

"LOSS OF PLC" "AVERAGE WARN" if one or more probes drop out of an average. "AVERAGE FAILED" for each average when only one probe in the average remains valid.

Each probe utilizes its own autonomous conditioning electronics, including its own power supply. Any failure in the OxyBalance system will not affect the individual 4-20 mA signals going to the control room for each probe.

1.) Probe fails (4-20 mA to default condition of 3.5 mA or 21 mA

2.) Probe is in cal (SPS / IMPS contact, must share with control room)

4-20 mA signals to be wired in series to the PLC and to the DCS I/O marshalling panel such that the loss of the PLC will not affect the transmission of the individual probe signals to the DCS. If PLC power, I/O cards or processor card(s) are lost, 4-20 mA signals from the probes are still transmitted to the control room.

(1)

Specifications are subject to change without notification. Our policy is one of continuous improvement and we reserve the right to change specifications.

(2)

1.5A above 40oC.

1-5

OxyBalance Oxygen Display and Averaging System

Instruction Manual

IM-106-4050 Original Issue

March 2006

1-6

Instruction Manual

IM-106-4050 Original Issue March 2006

Section 2 Installation

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-1

System Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-1

Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-2

Wiring Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-2

Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-2

Before starting to install this equipment, read the "Safety Instructions" in Appendix A: Safety Data. Failure to follow the safety instructions could result in serious injury or death.

OxyBalance Oxygen Display

and Averaging System

Disconnect all power before installing or replacing components. Failure to disconnect power may result in electrical shock and/or damage to the terminal.

Install all protective equipment covers and safety ground leads after installation. Failure to secure covers and ground leads could result in serious injury or death.

OVERVIEW This section describes:

1. Wall-mounting of the OxyBalance system.

2. The necessary wiring schematics for proper connection of the OxyBalance system.

3. Setup procedures conducted through the PanelView Plus 600 on how to configure, assign nomenclature, change/update display settings, and assigning the O

SYSTEM CONSIDERATIONS

Prior to installation of the OxyBalance system, check for all components necessary to install the system completely. When selecting a mounting location, determine where the OxyBalance system will be placed in terms of serviceability, ambient temperatures, environmental considerations, and convenience.

probes to the average outputs.

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OxyBalance Oxygen Display

Instruction Manual

IM-106-4050 Original Issue

and Averaging System

March 2006

MOUNTING The OxyBalance Oxygen Display and Averaging System was designed to be

wall-mounted or simply placed on a table. Locate the unit where the ambient temperature is between 23

The outline drawing in Figure 2-1 shows mounting dimensions of the OxyBalance system.

Figure 2-1. Mounting Dimensions

12.00

(304,8)

F to 149oF (-5oC to 65oC).

17.12

(434,8)

Note: All dimensions are

in inches with millimeters in parentheses.

38370002

WIRING CONNECTIONS Refer to Figure 2-2 and connect the input and output signal wiring to the

OxyBalance as follows:

1. Connect the incoming 4-20mA signals to the input signal terminals.

2. Connect the 4-20mA average O

3. Connect the In Cal input signals to the in cal signal terminals.

4. Connect the warning and failure signal output wiring to the warning and failure signal terminals.

5. If the signal pass-through feature for the incoming O used, remove the jumpers from the pass-through terminals. Connect the outgoing O

signal wires to the raised output signal terminals. Refer to

Figure 2-3.

6. Connect 90-240Vac, 50/60 Hz input power to the power input terminals.

signals to the output signal terminals.

signals will be

SETUP For setup information, refer to Section 3, Setup.

2-2

OxyBalance Oxygen Display and Averaging System

Figure 2-2. Installation Wiring Schematic

Ground

Neutral

Line

Probe 1

Probe 2

Probe 4

Probe 3

Probe 6

Probe 5

Instruction Manual

IM-106-4050 Original Issue

March 2006

Avg 4 Warning

Avg 3 Warning

Avg 2 Warning

Avg 1 Warning

Avg Warning Common

Avg 4 Fail

Avg 3 Fail

Avg 2 Fail

Avg 3&4 Fail Common

Avg 1 Fail

PLC Failure

Avg 1&2 Fail Common

Probe 8

Probe 7

Line

Voltage

In Cal

Contacts

POWER

RUN

FAULT

FORCE

COMM0

DCOMM

01 2 3 5 6 8 91011 1213

47IN012356 89

OUT

2-3

+-+-+-+-+-+-+-+

Probe 1

Probe 2

Probe 3

Probe 4

Probe 5

Probe 6

Probe 7

Incoming 4-20 mA

O Signals

+-+-+-+

Average 1

Probe 8

Average 4-20 mA

Output Signals

Average 4

Average 3

Average 2

38370003

OxyBalance Oxygen Display and Averaging System

Figure 2-3. Pass-Through Terminals

4-20 mA

Pass-Through

Terminals

Instruction Manual

IM-106-4050 Original Issue

March 2006

POWER

RUN

FAULT

FORCE

COMM0

DCOMM

0123568910111213

47IN01235689

OUT

010

343

4-20 mA

Input

Terminals

38370015

2-4

Instruction Manual

IM-106-4050 Original Issue March 2006

Section 3 Setup

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-1

Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-1

Before starting to install this equipment, read the "Safety Instructions" in Appendix A: Safety Data. Failure to follow the safety instructions could result in serious injury or death.

Disconnect all power before installing or replacing components. Failure to disconnect power may result in electrical shock and/or damage to the equipment.

OxyBalance Oxygen Display

and Averaging System

OVERVIEW This section provides information on setup and configuration of the

OxyBalance Oxygen Display and Averaging System

SETUP Each O

OxyBalance system. When a probe channel detects a current signal greater than 3.5 mA, that probe is considered active, and is automatically made available. It is not necessary to tell the OxyBalance that a probe is present. It is automatically detected and used. Table 3-1 shows how the OxyBalance system interprets and displays these signals.

Table 3-1. Signal Interpretation

After these signals are converted into an O touch screen interface. The rest of this section will outline the necessary steps to configure and operate the OxyBalance system through the touch screen interface.

probe generates a 4-20 mA output signal that is received by the

4-20 mA Signal Value Status Display Color

<3.5 mA Probe Inactive Not Shown

3.5 mA to 3.6 mA

3.6 mA to 3.8 mA Reading Under Range Yellow

3.8 mA to 20.5 mA Good Reading Green

20.5 mA to 21 mA Reading Over Range Yellow

>21 mA Probe Failed Red

Probe Failed

Red

% they are displayed on the

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OxyBalance Oxygen Display and Averaging System

All of the operations that are conducted through the touch screen interface, are conducted through five subject tabs that appear on the right hand side of the interface.

• Current

•Trend

•Login

• Setup

•Alarm

Instruction Manual

IM-106-4050 Original Issue

March 2006

Login The operation of the interface can be password protected, so either the Login

Required, or Login Not Required screen will be displayed once the Login tab has been pressed, Refer to Figure 3-1 and Figure 3-2.

Figure 3-1. Login Required Screen

3-2

Instruction Manual

IM-106-4050 Original Issue March 2006

Figure 3-2. Login Not Required Screen

OxyBalance Oxygen Display

and Averaging System

3-3

OxyBalance Oxygen Display and Averaging System

Instruction Manual

IM-106-4050 Original Issue

March 2006

Setup The Setup tab continas five sub-tabs displayed along the top of the screen; a

General tab, and one tab for each of the four averages.

General

Scale Values

Under this tab the values for the Analog full scale, Trend min value and Trend max value, can be changed to represent more of an applicable scale when displaying the probe or average outputs. See Figure 3-3.

Figure 3-3. Scale Values Setup

• Analog full scale - This setting controls the O the incoming 4-20 mA signals, and the average O input signals must represent the same full scale value.

• Trend min value - This values allows the adjustment of the minimum value displayed on the trend graphs on the touch screen display, allowing the display to zoom in on the range of interest. This setting only affects the displayed values. It has no affect on the average O output signals.

• Trend max value - This values allows the adjustment of the maximum value displayed on the trend graphs on the touch screen display, allowing the display to zoom in on the range of interest. This setting only affects the displayed values. It has no affect on the average O output signals.

% value represented by

% output signals. All

3-4

+ 44 hidden pages