Ecotech A Series, B Series, EC9830B, EC9830 Operation Manual

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EC9830

A & B Series

Carbon Monoxide

Analyzer

Operation Manual

98307600 Rev. C-1. November 2005

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Tel: (61 3) 9894 2399. Fax: (61 3) 9894 2445.

E-mail: ecotech@ecotech.com.au

Spare Parts parts@ecotech.com.au

12 Apollo Court, Blackburn, Melbourne,Victoria, 3130, Australia

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Address: Australia - Head Office

Customer Service Web site. www.ecotech.com.au

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EC 9830

Quick Start Guide.

Step 1 – Installation:

• Inspect analyzer for damage before turning on. Service Manual:- 1.1.

• Select an appropriate location. Operation Manual:- 2.1.1.

• Connect Gas lines. Operation Manual:- 2.1.2.2.

• Connect Analog Output Cables. Operation Manual:- 2.1.2.1.

• Connect RS232 Cables. Operation Manual:- 4.2.1.

• Check the mains power selection switch (115 or 230 VAC). Operation Manual:- 2.2.

• Connect AC Mains Power. Operation Manual:- 2.2.

Step 2 – Start-up:

• Set Service Switches. Service Manual:- 1.1.2.

• Turn On power. Operation Manual:- 2.2.

• The Display should read “9830 CO Analyzer”.

• Adjust the Display Contrast if required. Operation Manual:- 2.2.1.

• Verify that the software is running by observing the Ecotech Globe rotating in the bottom left

hand corner of the display.

Step 3. – Operation:

• Verify Instrument warm up and operation mode. Service Manual:- 2.2.

• Set the correct time and date. Operation Manual:- 2.3.3.

• If using RS232, configure the Interface menu. Operation Manual:- 2.5.12.

• Check SYSTEM FAULTS menu. All PASS. Operation Manual:- 2.5.21.

• Verify other menu settings. Service Manual:- 4.2.

Step 4. – Calibration:

• Perform a quick (single point) calibration. Operation Manual:- 2.4.

• Setup and Calibrate the Analog Outputs (if applicable). Operation Manual:- 2.6.3.

• If necessary, perform a leak check. Service Manual:- 3.3.10.

• If necessary, perform a flow calibration. Service Manual:- 3.5

• If necessary, perform a Multipoint calibration. Operation Manual:- 3.2.

Step 5. – Data Validation:

• Verify the results from your data acquisition system agree with the readings of the EC9830

CO analyzer.

• Verify that the analyzer responds to automatic calibration sequences.

The analyzer is now operating correctly.

FRONT MATTER

Table of Contents

MANUAL HISTORY.....................................................................................................................................................1

NOTICE......................................................................................................................................................................2

CE MARK DECLARATION....................................................................................................................................3

INTERNATIONALLY RECOGNIZED SYMBOLS USED ON ECOTECH EQUIPMENT............................................................4

SAFETY REQUIREMENTS ............................................................................................................................................5

FACTORY SERVICE.....................................................................................................................................................6

CLAIMS FOR DAMAGED SHIPMENTS AND SHIPPING DISCREPANCIES..........................................................................7

SERVICE AND SPARE PARTS.......................................................................................................................................8

WARNING...............................................................................................................................................................9

1. 0 DESCRIPTION................................................................................................................................................. 1-1

1.1 SPECIFICATIONS............................................................................................................................................... 1-2

1.1.1 Range ...................................................................................................................................................... 1-2

1.1.2 Noise (RMS) ............................................................................................................................................ 1-2

1.1.3 Lower Detectable Limit ........................................................................................................................... 1-2

1.1.4 Zero Drift ................................................................................................................................................ 1-2

1.1.5 Span Drift................................................................................................................................................ 1-2

1.1.6 Lag Time ................................................................................................................................................. 1-3

1.1.7 Rise/Fall Time, 95% of Final Value........................................................................................................ 1-3

1.1.8 Linearity Error ........................................................................................................................................ 1-3

1.1.9 Precision ................................................................................................................................................. 1-3

1.1.10 Sample Flow Rate ................................................................................................................................. 1-3

1.1.11 Sample Pressure Dependence ............................................................................................................... 1-3

1.1.12 Temperature Range............................................................................................................................... 1-3

1.1.13 Power .................................................................................................................................................... 1-3

1.1.14 Weight ................................................................................................................................................... 1-3

1.1.15 Analog Output....................................................................................................................................... 1-3

1.1.16 Digital Output ....................................................................................................................................... 1-4

1.2 U.S. EPA REFERENCE METHOD ...................................................................................................................... 1-4

2. 0 INSTALLATION AND OPERATION ........................................................................................................... 2-1

2.1 MECHANICAL INSTALLATION........................................................................................................................... 2-1

2.1.1 Selecting a Location................................................................................................................................ 2-1

2.1.2 Connections............................................................................................................................................. 2-1

2.2 AC POWER CONNECTION................................................................................................................................. 2-7

2.2.1 Display Adjustments................................................................................................................................ 2-8

2.2.2 Warmup................................................................................................................................................... 2-9

2.3 OPERATION.................................................................................................................................................... 2-10

2.3.1 General Operation Information ............................................................................................................ 2-10

2.3.2 Using the Menu and Making Entries .................................................................................................... 2-11

2.3.3 Setting the Date and Time ..................................................................................................................... 2-12

2.4 ANALYZER CALIBRATION .............................................................................................................................. 2-13

2.4.1 Precision Checks ................................................................................................................................... 2-13

2.4.2 Automatic .............................................................................................................................................. 2-13

2.4.3 Manual .................................................................................................................................................. 2-13

2.4.4 Analyzer Calibration Instructions......................................................................................................... 2-14

2.5 MENUS AND SCREENS.................................................................................................................................... 2-15

2.5.1 Primary Screen ..................................................................................................................................... 2-16

2.5.2 Main Menu ............................................................................................................................................ 2-17

2.5.3 Instrument Menu ................................................................................................................................... 2-17

2.5.4 Measurement Menu ............................................................................................................................... 2-18

2.5.5 Calibration Menu .................................................................................................................................. 2-20

98307600 Rev. C-1

EC9830 CO ANALYZER OPERATION MANUAL

2.5.6 Test Menu.............................................................................................................................................. 2-23

2.5.7 Output Test Menu .................................................................................................................................. 2-25

2.5.8 Preprocessor Pots Screen ..................................................................................................................... 2-25

2.5.9 Flow Control Pots Screen (A series only) ............................................................................................. 2-26

2.5.10 Valve Test Menu .................................................................................................................................. 2-27

2.5.11 Diagnostic Menu ................................................................................................................................. 2-29

2.5.12 Calculation factors.............................................................................................................................. 2-30

2.5.13 Interface Menu .................................................................................................................................... 2-30

2.5.14 Analog Output Menu........................................................................................................................... 2-31

2.5.15 Data Logging Menu ............................................................................................................................ 2-33

2.5.16 Network Adaptor Menu....................................................................................................................... 2-34

2.5.17 Trend Select Menu .............................................................................................................................. 2-34

2.5.18 Event Log Screen ................................................................................................................................ 2-35

2.5.19 Instrument Status Screen..................................................................................................................... 2-35

2.5.20 System Temperatures Screen............................................................................................................... 2-36

2.5.21 System Faults Screen .......................................................................................................................... 2-37

2.6 ANALOG OUTPUT........................................................................................................................................... 2-37

2.6.1 Offset and Live Zero.............................................................................................................................. 2-38

2.6.2 Over Range Adjustment ........................................................................................................................ 2-39

2.6.3 Analog Output Calibration Procedure.................................................................................................. 2-40

2.6.4 Calibration Requirements ..................................................................................................................... 2-41

2.7 PASSWORD PROTECTION................................................................................................................................ 2-41

2.7.1 Rules of Operation ................................................................................................................................ 2-41

2.7.2 Sample Session ...................................................................................................................................... 2-42

3. 0 CALIBRATION................................................................................................................................................ 3-1

3.1 OVERVIEW....................................................................................................................................................... 3-1

3.1.1 Analyzer Calibration Instructions........................................................................................................... 3-2

3.2 MULTIPOINT CALIBRATION PROCEDURE .......................................................................................................... 3-3

3.2.1 Procedure Using Cylinder Gas Dilution Method.................................................................................... 3-3

3.2.2 Procedure for 5 Point Multipoint Calibration ........................................................................................ 3-8

3.2.3 Procedure Using Multiple Cylinders .................................................................................................... 3-12

3.3 CALIBRATION REQUIREMENTS WHEN OVER-RANGING IS EMPLOYED ........................................................... 3-12

3.4 AUTOMATIC ZERO/SPAN CHECKS (AZS)....................................................................................................... 3-13

3.4.1 U.S. EPA Definitions............................................................................................................................. 3-13

3.4.2 AZS Outline ........................................................................................................................................... 3-14

3.4.3 AZS Setup .............................................................................................................................................. 3-16

3.4.4 Description of AZS Process .................................................................................................................. 3-17

3.5 CALIBRATION REFERENCES ........................................................................................................................... 3-18

4. 0 DIGITAL COMMUNICATION ..................................................................................................................... 4-1

4.1 DISCRETE CONTROL......................................................................................................................................... 4-1

4.1.1 50-Pin I/O Functional Specification ....................................................................................................... 4-1

4.1.2 50-Pin I/O Inputs .................................................................................................................................... 4-4

4.1.3 50-Pin I/O Outputs.................................................................................................................................. 4-4

4.2 SERIAL CONTROL............................................................................................................................................. 4-5

4.2.1 Serial Connections .................................................................................................................................. 4-5

4.2.2 Cable Connections .................................................................................................................................. 4-6

4.3 SERIAL TERMINAL CONTROL ........................................................................................................................... 4-7

4.4 SERIAL COMMAND CONTROL........................................................................................................................... 4-7

4.4.1 9800 Command Set Format .................................................................................................................... 4-7

4.4.2 Bavarian Network Command Set Format ............................................................................................... 4-8

4.4.3 Protocol Definition and Selection ......................................................................................................... 4-10

4.4.4 Establishing Communications............................................................................................................... 4-13

4.4.5 Serial Command Set.............................................................................................................................. 4-15

98307600 Rev. C-1

FRONT MATTER

4.5 USB COMMUNICATION.................................................................................................................................. 4-23

4.5.1 Installing the driver on a PC................................................................................................................. 4-23

4.6 EC9800 COMMUNICATOR SOFTWARE ........................................................................................................... 4-25

4.6.1 Data Acquire Mode............................................................................................................................... 4-25

4.6.2 Remote Terminal Mode ......................................................................................................................... 4-27

4.6.3 Settings .................................................................................................................................................. 4-29

4.6.4 Keyboard shortcuts ............................................................................................................................... 4-30

INDEX ........................................................................................................................................................................30

98307600 Rev. C-1

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98307600 Rev. C-1

FRONT MATTER

Manual History

This manual is the combination of two previous versions which have now been merged into one document to cater for the continuing development of the EC9800 series analyzers. The original manuals were:

• ML9830 Operation Manual , PN: 98300068, Rev. R, September 1998.

• ML9830B Operation Manual , PN: 98307005, Rev. K, December 1999.

The scope of this new manual covers the following analyzers:

• EC9830 Carbon Monoxide Analyzer, (A-Series), PN: 98301000-100.

• EC9830B Carbon Monoxide, (B-Series), PN: 98307000-1.

Both of the instruments are Manufactured by Ecotech P/L in Australia and support the new (SMD) Microprocessor Board (Part number 98000063-4). This manual is current for firmware version 1.11 and above.

Ecotech Manual ID: Manual PN: Current Revision: Date Released: Description:

#330.

98307600. C-1. November 2005. EC9830 Carbon Monoxide Analyzer, Operation Manual, A & B Series.

Revision History

Rev Date Summary Affected Pages

A Jan 2004 New Release for new Microprocessor Board. A & B

series Combined. Based on original manuals. B Feb 2004 Changes to menu options and structure. All C June 2005 Changed to updated EC manual All

C-1 November

2005

New Calculation factors screen added 2-15, 2-29

All

NOTE: The photograph on the binder of this manual is of the south coast of Australia during Bushfires in 2003. The photograph is courtesy of Earth Sciences and Image Analysis Laboratory, NASA Johnson Space Center. Photo Reference: ISS006-E-19897.

98307600 Rev. C-1 1

EC9830 CO ANALYZER OPERATION MANUAL

The information contained in this manual is subject to change without notice and does not represent a commitment on the part of the Ecotech Pty Ltd. Ecotech reserves the right to make changes in construction, design, specifications, and/or procedures that may not be reflected in this manual.

This manual is furnished on the express condition that the information herein will not be used for second source procurement, or purposes directly or indirectly detrimental to the interests of Ecotech.

Notice

2 98307600 Rev. C-1

FRONT MATTER

MARK DECLARATION

Declaration of Conformity

Sulfur Dioxide Analyzer

Scope of Declaration

The declaration applies to Sulfur Dioxide Analyzers as manufactured by Ecotech P/L, and which may be sold in the following configurations:

Part Number Description 98301000-100 98307000-T 98307000-1 98321000-100 98201000-101- 102 103

Ecotech certifies that this product operates in compliance with the following standards:

EN 61326-1 Electrical Equipment for measurement, control and laboratory use – EMC Requirements Edition 1.1 with amendment 1 plus amendment 2.

 Immunity Requirements EN61326-1

IEC-61000-4-11 Voltage Interrupts IEC-61000-4-11 Voltage Dips IEC-61000-4-3 Radiated RF electromagnetic field immunity test IEC-61000-4-4 Electrical fast transient/burst immunity test IEC-61000-4-5 Surge immunity test IEC-61000-4-6 Immunity to conducted disturbances, induced by

 Electromagnetic compatibility EN61326-1

Annex A CISPR 22 and CISPR 16-2 CISPR 16-1 and CISPR 16-2

EN 61010-1 Safety requirements for electrical equipment, control and laboratory use

 Section 19 of EN 60204-1

Insulation Resistance Check Residual Voltage Check Earth Continuity

The equipment must be operated as per the directions given by Ecotech P/L in this manual.

Carbon Monoxide Analyzer Carbon Monoxide Analyzer Trace Carbon Monoxide Analyzer, B Series Carbon Monoxide Analyzer High Level Carbon Dioxide Analyzer

radio frequency fields

98307600 Rev. C-1 3

EC9830 CO ANALYZER OPERATION MANUAL

Internationally Recognized Symbols Used on Ecotech Equipment

IEC 60417, No. 5016

IEC 60417, No. 5017

IEC 60417, No. 5021

IEC 60417, No. 5032

IEC 60417, No. 5041

ISO 7000-0434

ISO 3864, No. B.3.6 Caution, risk of electric shock

Electrical fuse

Earth (ground) terminal

Equipotentiality

Alternating current

Caution, hot surface

Caution, refer to accompanying documents

4 98307600 Rev. C-1

Safety Requirements

 To reduce risk of personal injury caused by electrical shock, follow all safety

notices and warnings in this documentation.

 This equipment should always be used with a protective earth installed.  The EC9830 is compliant with the requirements of EN61010-1 A2:1995,

Safety Requirements for Equipment for Measurement, Control, and Laboratory Use.

 If the equipment is used for purposes not specified by the manufacturer, the

protection provided by this equipment may be impaired.

 Replacement of any part should only be carried out by qualified personnel,

only using parts specified by the manufacturer. Always disconnect power source before removing or replacing any components.

 Surfaces marked with a “Caution, Hot Surface” (see internationally

recognised symbols on page 4) sticker may get hot and deliver burns. Measure the temperature on the surface before making any contact with it.

FRONT MATTER

Equipment Rating

 100-120/220-240V~ ±10%  50/60 Hz  250 VA max  5/3.15A T 250V  All wiring must be in accordance with local norms and be carried out by

experienced personnel.

Environmental Conditions

RELATIVE HUMIDITY

Temperature 5 to 40 degrees C Pollution degree 2 Installation category II Maximum altitude 2000m.

10% to 80%

Instruments suitable for use in a sheltered environment only.

Never operate this equipment in the presence of flammable liquids or vapors, as this could cause a safety hazard.

98307600 Rev. C-1 5

EC9830 CO ANALYZER OPERATION MANUAL

Factory Service

We strive to provide efficient and expedient service when an instrument or component is returned for repair. Your assistance can help us to better provide the service you need.

To ensure that we process your factory repairs and returned goods efficiently and expeditiously, we need your help. Before you ship any equipment to our factory, please call our Service Response Centre at (61 3) 9894 2399. This enables us to complete the necessary paperwork and process your equipment correctly when it reaches our facility.

When you call, please be prepared to provide the following information:

1. Your name and telephone number

2. Your company name with shipping address

3. The number of items being returned

4. The part number of each item

5. The model number or a description of each item

6. The serial number of each item, if applicable

7. A description of the problem you are experiencing if factory repair is needed, or the

reason you are returning the equipment (eg, sales return, warranty return, etc)

8. The original sales order number or invoice number related to the equipment

9. Whether repair work is under warranty or is to be billed, and a purchase order number

for any work to be billed.

When you call in, our Customer Service Representative will assign a Return Material Authorization (RMA) number to your shipment and initiate the necessary paperwork to process your equipment as soon as it reaches us. Please include this RMA number when you return equipment, preferably both inside and outside the shipping container. This will ensure that your equipment receives the most prompt attention possible. If the RMA

number is not marked on the outside of the shipping container, the shipment will be rejected when it reaches our facility, and returned at your expense.

Your assistance in this matter will enable us to serve you better. We appreciate your cooperation and support of our products and services.

6 98307600 Rev. C-1

FRONT MATTER

Claims for Damaged Shipments and Shipping Discrepancies

Damaged Shipment

1. Inspect all instruments thoroughly on receipt. Check material in the container(s) against the enclosed packing list. If the contents are damaged and/or the instrument fails to operate properly, notify the carrier and Ecotech immediately.

2. The following documents are necessary to support claims:

a. Original freight bill and bill of lading b. Original invoice or photocopy of original invoice c. Copy of packing list d. Photographs of damaged equipment and container

You may want to keep a copy of these documents for your records also.

Refer to the instrument name, model number, serial number, sales order number, and your purchase order number on all claims. Upon receipt of a claim, we will advise you of the disposition of your equipment for repair or replacement.

Shipping Discrepancies

Check all containers against the packing list immediately on receipt. If a shortage or other discrepancy is found, notify the carrier and Ecotech immediately. We will not be responsible for shortages against the packing list unless they are reported promptly.

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EC9830 CO ANALYZER OPERATION MANUAL

Service and Spare Parts

For world wide customer service & spare parts contact ECOTECH:

Address: Ecotech Pty Ltd

12 Apollo crt Blackburn Australia. VIC 3130

Phone: +61 3 9894 2399 Fax: +61 3 9894 2445

Email - Service: ecotech@ecotech.com.au Email - Spare Parts: parts@ecotech.com.au

Web: www.ecotech.com.au

Our Service Response Centre handles product information, application assistance, factory repair, training, service, maintenance agreements, and technical assistance.

8 98307600 Rev. C-1

FRONT MATTER

WARNING

Avoid smoking in the vicinity of the analyzer. Due to the complex chemical makeup of tobacco smoke, smoke drawn into the sample line may result in incorrect readings. Furthermore, tobacco smoke has been shown to contaminate converter and scrubber materials critical to the accuracy and stability of the analyzer.

98307600 Rev. C-1 9

EC9830 CO ANALYZER OPERATION MANUAL

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10 98307600 Rev. C-1

1.0 Description

The EC9830 carbon monoxide (CO) analyzer is a nondispersive infrared photometer that accurately and reliably measures low concentrations of CO, using gas filter correlation and state-of-the-art optical and electronic technology.

The EC9830 analyzer generates infrared radiation (IR) that is absorbed by the CO within the 5-meter folded pathlength. The gas filter correlation wheel facilitates rejection of interferents and the narrow band-pass filter ensures measuring only the CO-sensitive IR wavelengths. The CO content of the sample is continuously measured from a user-supplied air stream of which the instrument extracts 1 slpm (standard litre per minute) of sample.

The EC9830 has a built-in catalytic zero air scrubber which provides CO-free air to the analyzer. The microprocessor automatically resets the zero reading after the analyzer has sampled air through the converter.

CHAPTER 1, DESCRIPTION

In addition to temperature and pressure compensation, the EC9830 analyzer can readjust its span ratio based on a known concentration of gas used to span the analyzer. This feature is not automatically implemented and must be selected by the operator.

Analog and digital outputs are available for data monitoring. The operator can select analog output as either current or voltage output. Current ranges are 0-20, 2-20, and 4-20 mA. Voltage outputs include 0-10, 0-5, 0-1, and 0-0.1 volts (50-pin I/O board optional in EC9830 B series)

Data collection and recording is available to either a data acquisition system (such as a datalogger) or strip-chart recorder. A convenient DB50 connector is also included for digital input control and digital output status. The EC9830 also features internal data storage capabilities.

The instrument also includes an over-range feature that, when enabled, automatically switches to a preselected higher range if the reading exceeds 90% of the nominal range. When the reading returns to 80% of the nominal range, the analyzer automatically returns to that range.

The EC9830 carbon monoxide analyzer is designated as a reference method by the U.S. EPA. The operational parameters that apply when using the instrument as a designated reference method are included in section 1.2 below.

98307600 Rev. C-1 1-1

EC9830 CO ANALYZER OPERATION MANUAL

1.1 Specifications

All specifications are referenced to STP (standard temperature and pressure).

1.1.1 Range

 Display: Autoranging 0 to 200 ppm. Resolution = 1 ppt (selectable units and

decimal places).

 Analog output: 0-full scale from 0-1 ppm to 0-200 ppm with 0%, 5%, 10%

offset.

 Autoranging between 2 user-specified full scale values.  U.S. EPA designated range: Any full scale range between 0-5.0 ppm and

0-100 ppm.

1.1.2 Noise (RMS)

Note

 Measurement process: 0.025 ppm or 0.1% of concentration reading,

whichever is greater, with Kalman filter active.

 Analog output: 0.025 ppm or 0.1% of analog output full scale, whichever is

greater.

1.1.3 Lower Detectable Limit

 Measurement process: Less than 0.05 ppm or 0.2% of concentration reading,

whichever is greater, with Kalman filter active.

 Analog output: 0.05 ppm or 0.2% of analog output full scale, whichever is

greater.

1.1.4 Zero Drift

 Temperature dependent, 0.01 ppm per °C.  Time dependent, at fixed temperature:

 24 hours: Less than 0.1 ppm  30 days: Less than 0.1 ppm

1.1.5 Span Drift

 Temperature dependent, 0.05% per °C.  Time dependent, at fixed temperature:

 24 hours: 0.5% of reading.  30 days: 0.5% of reading.

1-2 98307600 Rev. C-1

1.1.6 Lag Time

Less than 20 seconds.

1.1.7 Rise/Fall Time, 95% of Final Value

Less than 40 seconds (1 slpm flow) with Kalman filter active.

1.1.8 Linearity Error

±1% of full scale (0 to 50 ppm); ±2% of full scale (0 to 200 ppm), from best straight-line fit.

1.1.9 Precision

0.1 ppm or 1% of reading, whichever is greater.

1.1.10 Sample Flow Rate

1 slpm.

CHAPTER 1, DESCRIPTION

1.1.11 Sample Pressure Dependence

A 5% change in pressure produces less than 1% change in reading.

1.1.12 Temperature Range

 5° to 40° C (41° to 104° F).  U.S. EPA designated range: 15° to 35° C.  Eignungsgeprüft range: 5° to 40° C.

1.1.13 Power

 99 to 132 VAC; 198 to 264 VAC; 47 to 63 Hz.  U.S. EPA designated range: 105 to 125 VAC, 60 Hz, or 200 to 240 VAC, 50

Hz.

1.1.14 Weight

20.9 kg (46 lb).

1.1.15 Analog Output

 Menu selectable current output of 0-20, 2-20, and 4-20 mA.  The 9830B requires an optional 50 I/O board to give voltage output. Jumper

selectable voltage output of 100 mv, 1 volt, 5 volts, and 10 volts, with menu selectable zero offset of 0%, 5%, or 10%.

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EC9830 CO ANALYZER OPERATION MANUAL

1.1.16 Digital Output

 Multidrop RS232 port shared between analyzers for data, status, and control.  Service RS232 port gives front panel access to a local or remote user.  USB port connection on the rear panel provides data transfer and control.  DB50 with discrete status, user control and analog output.

1.2 U.S. EPA Reference Method

The EC9830 carbon monoxide analyzer is designated under U.S. EPA regulations as reference method RFCA-0992-088. Use of the EC9830 under U.S. EPA designation as a reference method, as defined in 40 CFR Part 53, requires operation under the following conditions:

 Range: Any full scale range from 0-5.0 ppm to 0-100 ppm.  Ambient temperature: 15° to 35° C.  Line voltage: 105 to 125 VAC, 60 Hz, or 200 to 240 VAC, 50 Hz.  Flow rate: 1 slpm.  Pump: Internal Pump (A Series), Ecotech external pump or equivalent (B

Series) (see section 2.1.2.3).

 Filter: A 5 micron PTFE filter must be installed in front of the sample inlet

(Zero and Span gas must pass through this filter).

 If the units in the MEASUREMENT MENU are changed from volumetric to

gravimetric (or gravimetric to volumetric), the analyzer must be re calibrated.

 The analyzer must be operated and maintained in accordance with this

operation manual.

 The following menu selections must be used:

INTERFACE MENU

ANALOG OUTPUT MENU

RANGE: 5 PPM to 100 PPM OVER-RANGING: ENABLED or DISABLED

INSTRUMENT MENU

MEASUREMENT MENU

FILTER TYPE: KALMAN

CALIBRATION MENU

CALIBRATION: MANUAL or TIMED

SPAN COMP: DISABLED BACKGROUND: not DISABLED

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CHAPTER 1, DESCRIPTION

TEST MENU

PRES/TEMP/FLOW COMP: ON

DIAGNOSTIC MODE: OPERATE

 Set the Service switch to IN.

The EC9830 B series is U.S. EPA equivalent only when fitted with the following options/items:

 Valve assembly for external zero span (EZS)  Rack mount assembly  50-pin connector board (Standard in A series)  High pressure span valve option

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1-6 98307600 Rev. C-1

2.0 Installation and Operation

2.1 Mechanical Installation

Before installation, the unit should be checked to ensure that the instrument arrived undamaged. The EC9830 Service Manual contains initial installation inspection instructions.

2.1.1 Selecting a Location

Select a location for the analyzer where temperature variation, dust, and moisture are minimal. The location should be well ventilated and should allow convenient access to the operator controls and front panel display.

2.1.1.1 Rack Mount or Enclosed Location

The analyzer is supplied as a bench-top version with rubber feet or with the chassis slides to convert it to a rack-mount version. The optional rack-mount version is 24 inches deep and fits into a 19 inch (48.3 cm) RETMA instrumentation rack. The front panel will protrude slightly. Refer to the instructions provided with the rack-mount kit for assembly into a rack.

CHAPTER 2, INSTALLATION AND OPERATION

Note

After the analyzer has been mounted, make the pneumatic and electrical connections.

2.1.2 Connections

All pneumatic connections must be secure to ensure accurate operation of the analyzer. The following information describes connection techniques for

Caution

The rack-mount version requires a properly ventilated rack enclosure. The temperature inside enclosures that are not properly ventilated may rise as much as 15° C above the ambient air temperature in the control room. The actual rack temperature can rise above the specified limits and cause the analyzer to operate outside of specifications. Optimum operation is obtained at an operating temperature of 20° to 30° C inside the rack enclosure. The analyzer can operate in a range of 5° to 40° C without risk of damage. For ventilation calculations, use a heat dissipation rating of 150 watts or 512 Btu per hour.

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EC9830 CO ANALYZER OPERATION MANUAL

NETWORK

pneumatic and electrical connections. Figure 2-1 shows the rear panel of the analyzer with associated connections. Notice the Network connection is optional

RS 232

USB

(Optional)

Figure 2-1. Analyzer Rear Panel

2.1.2.1 Recorder and DAS Connections

CAUTION:

The EC9830 electrical ground is isolated from earth ground. To avoid possible ground loops, all electrical devices connected to the analyzer should have floating inputs (not connected to earth ground).

2.1.2.1.1 The 50-Pin I/O PCA

The 50-pin I/O connector board plugs into the discrete I/O connector, and provides voltage and current outputs to drive a strip chart recorder (REC) and a data acquisition system (DAS). The outputs are illustrated in Figure 2-2.

The 50-pin I/O PCA is optional for the EC9830 B series analyzer.

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CHAPTER 2, INSTALLATION AND OPERATION

Figure 2-2. 50-Pin Connector Board (Front)

The output is jumper-selectable as:

 Current (see Figure 2-3). Range is set using the menu in a later step.  Voltage, with selectable ranges of 0 to 0.1 V, 0 to 1 V, 0 to 5 V, and 0 to

10 V. See Figure 2-3.

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Figure 2-3. 50-Pin Connector Board with Sample Choices (Rear)

Select the output for your application using the following steps.

1. Remove the 50-pin connector board from the rear panel of the analyzer.

2. Place the jumpers on the pins that correspond to the desired printed selections

on the front of the board. If current is selected, only the jumpers selecting current make contact with both rows of pins. The other jumpers are offset as shown in Figure 2-3.

If a current output is selected, the range must also be chosen from the menu when the instrument is operating. The compliance voltage for the current output is 12 V. A terminating resistor of 600 ohms or less should be used for measurement errors no greater than 1%.

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CHAPTER 2, INSTALLATION AND OPERATION

If voltage output is selected, both the REC and DAS outputs are factory-set for 10 volts full scale. Other full scale outputs of 5 V, 1 V, and 0.1 V can be selected. Select the full scale output for REC and DAS. When using voltage output, the source resistance for both REC and DAS outputs is 1000 ohms. The recorder and DAS input resistance should be greater than 500K ohms for a measurement error no greater than 1%.

3. Connect the recorder or DAS wires to the appropriate terminal block. The

wire positions are:

OUT = positive or signal COM = ground or low SHLD = shielded cable.

Caution

To prevent ground loop problems, connect the shield of the cable at the analyzer only, not at the recorder or DAS.

For additional information regarding output, see section2.6.

2.1.2.1.2 Current Output Connections

When using the EC9830 without the 50-pin I/O PCA, the analyzer still provides current outputs to drive a strip chart recorder or DAS. These outputs are present on the discrete I/O connector at the following pins:

Function Pin (Discrete I/O Connector)

Current Out (+) 15

DGND (Gnd) 1,12,14, or 16

If a current output is connected the range must also be chosen from the menu when the instrument is operating. The compliance voltage for the current output is 12 V. A terminating resistor of 600 ohms or less should be used for measurement errors no greater than 1%.

2.1.2.1.3 Voltage Output Connections

The current output mentioned above can be converted to a voltage output by adding a terminating resistor across the output. This resistor must be 50 ohms per full scale voltage desired (50 ohms = 1 V full scale; 500 ohms = 10 v full scale, etc). Following is a list of typical output ranges and required terminating resistance:

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EC9830 CO ANALYZER OPERATION MANUAL

Desired Output (Volts) Terminating Resistance (Ohms)

10 Volts 500 Ohms

5 Volts 250 Ohms

1 Volt 50 Ohms

0.1 Volt 5 Ohms

When using voltage output, the source resistance is 1000 ohms. The recorder or DAS input resistance should be greater than 500K ohms for a measurement error no greater than 1%.

2.1.2.2 Sample Gas Connections

Sample connections to the EC9830 should be maintained at ambient pressure, with any excess flow vented to the atmosphere.

The EC9830 requires at least 1.50 slpm (1.0 slpm sample plus 50% overflow) of particulate-filtered (<5 micron), dry (noncondensing) sample furnished at all times. A 5 micron inlet filter is necessary to meet USEPA requirements which is already installed in the A series analyzer.

Caution

Tubing used for sample gas and exhaust connections must be ¼ inch OD and 1/8 to 3/16 inch ID. The recommended ID is 5/32 inch. A segment of clean Teflon® tubing should be purchased to connect the sample source to the sample inlet. Only use lines and fittings made of stainless steel, Teflon, Kynar®, or glass.

Instructions for Kynar fittings:

 Cut the tubing squarely and remove any burrs.  Insert the tubing through the back of the nut until it reaches the tube stop in

the fitting.

 Tighten the nut finger-tight plus 1-1/2 to 2 turns. A squeaking sound when

tightening the nut is normal.

 All nuts should be re-tightened when the system reaches operating

temperature.

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CHAPTER 2, INSTALLATION AND OPERATION

2.1.2.3 Exhaust Connections

2.1.2.3.1 A Series

When making exhaust connections, locate the exhaust outlet away from the sample inlet and occupied enclosed areas. Connect a 1/4" OD line from the exhaust port to an exhaust manifold that vents outside of occupied areas. Lines and fittings of materials other than those cited above can be used for these connections.

2.1.2.3.2 B Series

Connect the exhaust port of the analyzer to a vacuum pump capable of 1 slpm at 15” Hg (50 kPa) vacuum (minimum capacity). The exhaust of the pump should be connected to a manifold to vent the exhaust gas away from occupied areas.

An optional exhaust pump is available from Ecotech.

Flow in the EC9830B is calculated assuming critical pressure across an orifice, thus the exhaust vacuum must be maintained at less than ½ atmosphere (approximately 15” Hg or 50 kPa at sea level) to keep the orifice critical. It is recommended that the user install a vacuum gauge on the exhaust line and periodically check that sufficient vacuum is being maintained. If pump performance deteriorates below this level, flow indications from the analyzer will no longer be valid.

2.2 AC Power Connection

Verify that the power selection switch on the rear panel and the power cord and fuse are appropriate for your use. Move the switch right or left so the appropriate voltage rating is visible on the switch. Figure 2-1 shows the voltage selection switch.

Caution

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EC9830 CO ANALYZER OPERATION MANUAL

Power is supplied to the analyzer through a three-pin power plug. The ground must not be defeated and an adequate ground must be connected to the instrument, both for proper performance and for the safety of operating personnel. The warranty on the analyzer applies only if the analyzer is properly grounded. If it is not properly grounded and electric power is applied in violation of the National Electric Code, ECOTECH assumes no responsibility for any injury to personnel or damage to property.

Be sure to check that the mains power selection switch is at the correct setting before turning the instrument on. Failure to do so may result in damage to the power supply.

Warning

Connect the power plug to the power receptacle and press the power switch to the ON position on the rear panel. Also make sure that the DC POWER switch on the front secondary panel is switched to ON.

2.2.1 Display Adjustments

Adjust the display contrast and backlight intensity by simultaneously pressing two keys on the front panel (see Figure 2-4):

 Contrast

Up arrow () and <Select> for darker contrast, Down arrow () and <Select> for lighter contrast.

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Figure 2-4. Analyzer Front Panel

CHAPTER 2, INSTALLATION AND OPERATION

 Backlight

The backlight brightness is fixed to maximum and cannot be adjusted.

Hold the key combinations until the desired contrast appears on the display.

Note

Pressing the Up or Down arrow key without simultaneously pressing the <Select> key when the main screen is displayed causes the screen query,

START MANUAL CALIBRATION? If this happens

while adjusting the display, press the <Exit> key.

Note

The display is sensitive to the ambient air temperature and analyzer temperature. The appearance of the display will vary with changes in these conditions.

2.2.2 Warmup

When the instrument is initially powered up, several components in the instrument are automatically configured by the microprocessor and an automatic zero is run. This process takes about 30 minutes. During the startup period, several messages are displayed on the initial screen. These indicate the progression toward normal operation.

Initial Screen Message Instrument Activity

REFERENCE TEST

ZERO TEST

REFERENCE ADJUST

AUTO ZERO ADJUST / ELECTRONIC ZERO ADJUST BACKGROUND FILL

BACKGROUND MEASURE

SAMPLE FILL SAMPLE MEASURE

Test Reference pot adjusted to check functionality of preprocessor reference circuit.

Test Measure pot adjusted to check functionality of preprocessor measure circuit.

Reference pot adjusted to achieve reference voltage of 4.0 ±0.1 volts.

Coarse and fine zero of measurement channel with zero air flowing.

Cell filling with zero air. Zero reading from measurement cell. Final determination of

system zero. Cell filling with sample air. Instrument operational (must be calibrated if this is the first

power-up sequence).

Approximately one hour later, the background portion of this cycle is repeated. This time the cycle takes only 5 minutes. A third cycle is performed

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EC9830 CO ANALYZER OPERATION MANUAL

approximately two hours after startup from cold condition. These repeat adjustments ensure the instrument is at equilibrium and correctly zeroed.

After the first three cycles, the instrument repeats the background cycle daily at midnight (unless BACKGROUND is set to DISABLED), or whenever a temperature excursion of 4° C (7° F) occurs. This auto-zero eliminates the effect of zero drift on measuring accuracy. The zero can be validated through manual check.

The EC9830 will re-run the above startup routine whenever power has been lost for more than two minutes. If power is lost for less than two minutes, the analyzer will return to its previous settings without the startup routine.

2.3 Operation

Note

The operation section describes the actions necessary to operate the instrument, first in general, and then in specific terms. In section 2.5, the menu headers are shown as they appear on the display screen. The illustration is followed by explanatory information regarding the menu entries or choices. The entire menu tree is shown in Figure 2-6.

2.3.1 General Operation Information

All operator responses needed to operate the EC9830 are performed by pressing the 6 keys available on the front panel to the right of the display screen. The key functions are described below.

Figure 2-5. Analyzer Keyboard

The key functions are listed below:

 Up arrow key ()

Moves the cursor to the previous menu item or, in an input field, moves the cursor to the next choice or increments the digit in a numerical field.

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CHAPTER 2, INSTALLATION AND OPERATION

 Down arrow key ()

Moves the cursor to the next menu item or, in an input field, moves the cursor to the next choice or decrements the digit in a numerical field.

 <Select>

Selects the menu choice or selects the field for input.

 <Pg Up>

Moves the cursor to the previous page or screen.

 <Exit>

Leaves a field without making a change or returns the cursor to the main screen.

 <Enter> (↵)

Confirms a menu item or a field selection to the microprocessor.

2.3.2 Using the Menu and Making Entries

The EC9830 analyzer is programmed with a series of menus that allows the operator to view parameters, such as those generated by the microprocessor, or to enter digital parameters, when appropriate, or to select from among the choices displayed.

The cursor is displayed as a moveable highlighted area of text. (Letters appear as the opposite of the rest of the text on the screen.)

2.3.2.1 Screen Fields

Screen fields that allow input are of two types:

 Choice fields

Contain a fixed series of choices in a wraparound scrolling format.

 Digit fields

Fields of programmable digital parameters in either wraparound scrolling or non-wraparound scrolling format.

To select from among the choices in a choice field, first press the <Select> key to designate the field, then use the Up and Down arrow keys to highlight the desired selection. When the desired selection is displayed, press the <Enter> key to confirm the entry.

To set digits in a digit field, first press the <Select> key to designate the field and to highlight the different digits in the field. When the cursor indicates the digit you wish to change, press the Up or Down arrow key until the desired digit appears.

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EC9830 CO ANALYZER OPERATION MANUAL

Go to the next digit by pressing <Select>. When all digits of an entry are correct, press the <Enter> key to confirm the entry.

The <Select> key does not confirm an entry. You must press the <Enter> key.

2.3.2.2 Microprocessor-Generated Information

Some fields, such as those on the INSTRUMENT STATUS and the SYSTEM

TEMPERATURES screens, contain information generated by the microprocessor.

The operator cannot affect the readings in these fields. (If you find that the cursor will not enter a field, the field contains microprocessor-generated information.)

2.3.2.3 Exiting Without Making a Change

If you decide not to make a change during this process, simply press the <Exit> key, and the values will return to the previous entries.

Caution

2.3.3 Setting the Date and Time

Before the instrument can be calibrated or collect data for regulatory use, the time and date must be set. Go to the INSTRUMENT MENU and select DATE and TIME. If they are not already set, use a 24-hour clock setting for the time and set the date in the day- month-year format. The instrument automatically runs an auto-zero cycle at midnight (unless BACKGROUND is set to DISABLED) each day according to these settings. See section 2.5 for instructions on programming menu entries.

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2.4 Analyzer Calibration

When the EC9830 analyzer is powered on for the first time, the analyzer must be calibrated to ensure accurate CO measurements. The analyzer does not require recalibration after further power interruptions or resets. However if the instrument is transported to a new location, or maintenance work is performed, the instrument may require re-calibration. To determine weather the instrument requires a calibration, a precision check can be performed as discussed in the following sections.

2.4.1 Precision Checks

A precision check is a Level 2 calibration as discussed in section 3.4. This means that the instrument is only checked against a know calibration source and is not adjusted. A precision check can be performed either manually or automatically.

2.4.2 Automatic

Most modern air quality monitoring systems have data acquisition systems which can automatically initiate and record the results of a daily precision check. The means by which the analyzer is externally controlled is via the 50 PIN IO connection, or via the RS232 multidrop connection. Refer to section 4.0 for more details on interfacing to these ports.

CHAPTER 2, INSTALLATION AND OPERATION

2.4.3 Manual

A manual precision check can be initiated as follows:

1. Connect a source of span gas to the analyzer through the Auxiliary port. (see

chapter 3 for instructions on preparing calibration gas).

2. From the CALIBRATION MENU set CALIBRATION to MANUAL and CAL. MODE

to SPAN.

3. Allow the analyzer to sample the span gas until a stable reading is obtained,

typically 15 minutes.

4. Verify this stable reading against the know calibration concentration.

5. Typically if it is within 5%, then a calibration is not required.

6. If a calibration is required, continue with the following procedure in section

2.4.4. If not, return the CAL. MODE to MEASURE.

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2.4.4 Analyzer Calibration Instructions

This procedure is a quick guide to single point span calibration of the EC9830 analyzer. For complete gas preparation and multipoint calibration instructions, refer to the multipoint calibration procedure in Chapter 3.

1. With a stable supply of calibration gas connected to the Auxiliary port of the

analyzer, verify that in the CALIBRATION MENU, CALIBRATION is set to

MANUAL and CAL. MODE to SPAN.

2 From the primary screen start the calibration sequence by pressing either the

Up or Down arrow ( or ) until the display prompts START MANUAL

CALIBRATION. Pressing the <Select> key will allow you to choose from: NO, SPAN or ZERO. Confirm that the display reads SPAN and press <Enter> (↵).

A backlit cursor will be displayed on the CO concentration display.

Note

3 Use the <Select> key to move the position of the backlit cursor, and the Up

and Down arrow keys to increment and decrement the value of the backlit digit until the span calibration gas concentration value is displayed. When the desired concentration is displayed, press <Enter>.

4 Then move the backlit cursor to the INSTRUMENT GAIN field. The instrument

gain is automatically calculated by the analyzer. Press <Enter> to confirm this value. Press <Exit> to return to the primary screen.

5 The concentration on the primary screen should now read the same as the

concentration of the calibration gas.

Note

The auto-zero function of the EC9830 eliminates the need for a traditional zero calibration.

This completes the span calibration of the EC9830 analyzer.

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2.5 Menus and Screens

CO CAL PRESSURE

AVG CONCENTRATION

ZERO OFFSET

SPAN COMPENSATION

SAMPLE FLOW

ANALOG SUPPLY

VERSION

A/D INPUT

MAIN GAS ID

AVERAGE PERIOD

FILTER TYPE

RANGE

OVER-RANGING

AVERAGE DATA

ERASE LOGGED DATA

ANALOG OUTPUT MENU

MULTIDROP BAUD

VALVE TEST MENU

AUX. VALVE #1

VALVE SEQUENCING

CONC.VOLTAGE

ANALOG OUTPUT TEST

GAS PRESSURE

This section illustrates the various menus and screens for the EC9830 analyzer. The B series menu structure will be very similar in structure yet will not have some of the options that are available in the A series (These will be made clear throughout the relevant sections) A short description of each menu and screen is also provided. The entire menu structure is shown in Figure 2-6 below.

CHAPTER 2, INSTALLATION AND OPERATION

MAIN MENU

INSTRUMENT MENU

CALIBRATION MENU

TEST MENU

INTERFACE MENU

TREND SELECT MENU

EVENT LOG

INSTRUMENT STATUS

SYSTEM TEMPERATURES

SYSTEM FAULTS

MEASUREMENT MENU DATE TIME PASSWORD ERASE MEMORY

CALIBRATION:(TIMED) TIMER INTERVAL STARTING HOUR CYCLE TIME CO TIMED SPAN CALIBRATION SPAN COMP CO SPAN RATIO BACKGROUND BACK INTERVAL

OUTPUT TEST MENU DIAGNOSTIC MENU CALCULATION FACTORS MEASUREMENT GAIN PRES/TEMP/FLOW COMP DIAGNOSTIC MODE CONTROL LOOP TEST MEASURE

DATA LOGGING MENU MAIN GAS ID INTERFACE MODE

DATA LENGTH STOP BITS PARITY COMM. PROTOCOL NETWORK ADAPTOR

GAS FLOW GAS PRESSURE REF. VOLTAGE CONC. VOLTAGE

DIGITAL SUPPLY

UNIT SELECTION CONVERSION TEMP DECIMAL PLACES

NOISE

CALIBRATION:(MANUAL) CAL MODE CALIBRATION BACKGROUND BACK INTERVAL

PREPROCESSOR POTS FLOW CONTROL POTS

MULTIDROP PORT TEST WATCHDOG TEST DISPLAY TEST

OUTPUT TYPE OFFSET FULL SCALE ZERO ADJUST OVER RANGE

INST. DATA TOTAL CAPACITY

CONCENTRATION

REFERENCE

SAMPLE PRESSURE

MEASURE COARSE ZERO MEASURE FINE ZERO INPUT TEST REFERENCE TEST MEASURE REF. VOLTAGE CO

FLOW CONTROL ZERO FAN SPEED CONTROL PUMP SPEED FINE PUMP SPEED COARSE GAS FLOW

INT. VALVE #1 INT. VALVE #2 INT. VALVE #3

EXT. MEASURE EXT. ZERO GAS EXT. SPAN GAS

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CELL TEM. CONV. TEMP.

CELL TEMPERATURE SAMPLE GAS FLOW FLOW BLOCK TEMP

12 VOLT SUPPLY REFERENCE VOLTAGE CONVERTER TEMP COOLER & IR SOURCE CHOPPER WHEEL

MIRROR TEMP.

CHASSIS TEMP. FLOW TEMP. COOLER TEMP. MIRROR TEMP.

Figure 2-6. Menu Structure

EC9830 CO ANALYZER OPERATION MANUAL

The values shown in the illustrations are examples only. Your display can be affected by the settings you choose.

2.5.1 Primary Screen

GAS CO X.XX PPM X.XX AVG

INSTRUMENT GAIN: 0.900 SAMPLE MEASURE STATUS LINE

12:14 15-DEC-03 MAIN MENU

Note

Figure 2-7. Primary Screen

When power is applied, the screen displays the Ecotech logo for a few seconds. It then identifies the analyzer and the notation MAIN MENU appears in the lower right corner. In the lower left hand corner there is the Ecotech Globe rotating, indicating that the program is running. After the warmup period, the operation mode is designated at the left of the screen and the current gas measurements for the analyzer are indicated, as shown in Figure 2-7.

Instrument faults will be reported on the status line which appears one line below the instrument state display. The following rules apply governing the information displayed on this line: If there are no failures, the status line is blank. If there is a single failure, that failure is displayed on the status line (i.e., ZERO FLOW, HEATER

FAULT, etc). The status line will clear when the fault clears. If there are multiple

failures, the failure at the top of the failure list will be displayed on the status line. When this failure clears, the next failure on the list will be displayed. The entire list of failures is displayed on the SYSTEM FAULTS screen.

Instrument gain (displayed above the operational mode) indicates the relationship between the calibration concentration and a measured gas concentration within the analyzer. It is an essential parameter for the calibration of the analyzer and is an important requirement for system audits.

When the primary screen is displayed and the cursor is flashing in the words MAIN

MENU, press the <Select> or <Enter> key to enter the MAIN MENU.

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2.5.2 Main Menu

INSTRUMENT MENU CALIBRATION MENU TEST MENU INTERFACE MENU TREND SELECT MENU EVENT LOG INSTRUMENT STATUS SYSTEM TEMPERATURES SYSTEM FAULTS

Each of the menus listed in Figure 2-8, except the final four, has one or more levels of menu items contained within the selection.

The EVENT LOG is created by the microprocessor to indicate deviations in the operating parameters. This screen can be used to determine the cause of system problems.

CHAPTER 2, INSTALLATION AND OPERATION

MAIN MENU

Figure 2-8. Main Menu

The INSTRUMENT STATUS and SYSTEM TEMPERATURES screens constantly update readings that apply to the operation of the instrument.

The SYSTEM FAULTS screen provides a pass or fail indication for various parameters which are continually monitored. These parameters must be within acceptable operating ranges in order to display PASS.

2.5.3 Instrument Menu

MEASUREMENT MENU DATE: 15-JUL-93 TIME: 18:57 PASSWORD: UNLOCKED

The items in the INSTRUMENT MENU address instrument settings needed to initiate operation.

INSTRUMENT MENU

ERASE MEMORY: NO

MAIN GAS ID: 030

Figure 2-9. Instrument Menu

DATE

The date format is day-month-year.

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TIME

Set in 24-hour format. Setting the time resets the seconds (internally) to zero for synchronization with an external clock.

PASSWORD

See section 2.7 below.

ERASE MEMORY

If YES is selected, the following message is displayed:

!THIS WILL ERASE SYSTEM GAINS! !!!ARE YOU SURE: NO

The word NO is highlighted in this warning. Scrolling to YES and pressing <Enter> will erase the memory in the analyzer.

This feature is provided for service, and for preliminary configuration purposes. Please do not choose this selection during normal operation.

If the analyzer memory is erased, all userconfigured parameters will return to their default values. In addition, all instrument calibration will be lost, so the analyzer will have to be fully recalibrated. This feature is provided for service, and for preliminary configuration purposes. Please do not choose this selection during normal operation.

MAIN GAS ID

The ID address of the analyzer when Multidrop RS232 communications is used.

2.5.4 Measurement Menu

UNIT SELECTION : uG/M3 CONVERSION TEMP : 0 DEG C* DECIMAL PLACES : 3 AVERAGE PERIOD : 1 MINUTE FILTER TYPE : KALMAN NOISE : 24.234 PPB ZERO OFFSET : 0.00 PPB

Caution

MEASUREMENT MENU

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Figure 2-10. Measurement Menu

CHAPTER 2, INSTALLATION AND OPERATION

The MEASUREMENT MENU consists of three items needed for basic operation and data integrity.

UNIT SELECTION

PPM (parts per million), mG/M

(milligrams per cubic meter), nG/M3 (nanograms per cubic meter), G/M3 (micrograms per cubic meter), PPT (parts per trillion) or PPB (parts per billion).

Note

If the gravimetric units are selected (mG/M3, µG/M3 or

nG/M3), then the conversion factors listed below will apply depending on the CONVERSION TEMP selected.

To convert 1 PPB “Gas” to ug/m

0 °C 20 °C 25 °C

Multiply by:

1.250 1.165 1.145

1.960 1.830 1.800

Note

If the units in the MEASUREMENT MENU are changed from volumetric to gravimetric (or gravimetric to volumetric), the analyzer must be re calibrated in order to meet U.S. EPA requirements.

CONVERSION TEMP

Sets the temperature that should be used in internal calculations to convert the concentration from volumetric units into gravimetric units (mG/M3, µG/M3 or

nG/M

) in DEGREES CELCIUS (0, 20, 25). *This menu option is only displayed

when the gravimetric units are selected.

DECIMAL PLACES

Set the number of decimal places in which the data is displayed on the screen. (0,

1, 2, 3, 4 or 5).

Note

The screen is able to display up to 7 characters of data including the decimal place for each reading.

AVERAGE PERIOD

Set time in HOURS (1, 4, 8, 12, or 24) or MINUTES (1, 3, 5, 10, 15, or

30). This field is a wraparound field.

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FILTER TYPE

Sets the time constant of the digital filter. Choices are NO FILTER, 300

SECONDS, 90 SECONDS, 60 SECONDS, 30 SECONDS, 10 SECONDS or KALMAN

(adaptive).

The Kalman filter is the factory default setting and must be used when using the instrument as a U.S. EPA equivalent method.

NOISE

The standard deviation of the concentration. The manner in which this is done is as follows: 1. Take a concentration value once every two minutes; 2. Store 25 of these samples in a first in, last out buffer; 3. Every two minutes, calculate the standard deviation of the current 25 samples. This is a microprocessor-generated field and cannot be set by the operator.

This reading is only valid if zero air or a steady concentration of span gas has been fed to the analyzer for at least one hour.

Note

ZERO OFFSET

ZERO calibration correction factor. User can manually set the offset between

± 10.00 PPB.

2.5.5 Calibration Menu

The CALIBRATION MENU contains entries used to choose calibration gases or to perform automatic zero-span cycles. The choice of TIMED or MANUAL calibration displays a slightly different screen. TIMED calibration generates a zero/span check that occurs at a chosen interval without operator intervention. MANUAL calibration allows for operator-controlled calibration. Only one choice, TIMED or MANUAL, applies at any given time.

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CHAPTER 2, INSTALLATION AND OPERATION

2.5.5.1 Timed Calibration

The following screen appears when CALIBRATION: TIMED is selected.

CALIBRATION MENU

CALIBRATION : TIMED TIMER INTERVAL : 24 HOURS STARTING HOUR : 0 CYCLE TIME : 15 MINS CO TIMED SPAN : 10.000 PPM CALIBRATION : INTERNAL SPAN COMP : ENABLED CO SPAN RATIO : 1.0000 BACKGROUND : START BACK. INTERVAL : 24 HOURS

CO CAL PRESURE : 760.0 TORR

Figure 2-11. Timed Calibration Menu

CALIBRATION

Designates TIMED or MANUAL calibration control.

TIMER INTERVAL

The number of hours between the zero/span checks.

STARTING HOUR

The hour when the first zero/span check will be performed.

CYCLE TIME

The period (1 to 59 minutes) of the zero & span steps during a timed calibration.

CO TIMED SPAN

Digital setting of the span concentration reading the operator expects the instrument to read during and AZS cycle. An entry is required only if SPAN COMP is ENABLED.

CALIBRATION

The choice of INTERNAL or EXTERNAL valves that will operate during a zero/span check. (The EZS valve option must be installed to use EXTERNAL.)

SPAN COMP

A choice of ENABLED or DISABLED. This function automatically corrects span readings to the expected value. See Chapter 3 for additional information.

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EC9830 CO ANALYZER OPERATION MANUAL

SPAN COMP must be disabled for U.S. EPA designated use.

CO SPAN RATIO

A microprocessor-generated field that is the value by which the span reading is multiplied to correct the reading to the calibration value. This value is only applied if SPAN COMP is ENABLED.

BACKGROUND

A choice of START, DISABLED or ENABLED. If START is selected, then when <Enter> is pressed the instrument begins an auto-zero (background) cycle. If

DISABLED is selected, then the instrument will not run the normal auto-zero

(background) cycle. If ENABLED is selected, then the instrument will run the normal auto-zero (background) cycle.

The background cycle must not be disabled for U.S. EPA designated use.

Note

BACK. INTERVAL

Set time in HOURS (2, 4, 6, 8, 12, 24). A microprocessor-controlled

field that indicates when an autozero cycle will begin. The results of the background are stored in the EVENT LOG.

CO CAL PRESSURE

This is the measured ambient pressure during the last CO calibration.

2.5.5.2 Manual Calibration

The following screen appears when CALIBRATION: MANUAL is selected.

CALIBRATION MENU

CALIBRATION : MANUAL CAL. MODE : MEASURE

CALIBRATION : INTERNAL

BACKGROUND : ENABLED BACK. INTERVAL : 24 HOURS

CO CAL PRESSURE : 750.0 TORR

Figure 2-12. Manual Calibration Menu

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CHAPTER 2, INSTALLATION AND OPERATION

CALIBRATION

MANUAL initiates operator-controlled calibration.

CAL. MODE

A choice of MEASURE (normal mode), CYCLE (zero/span), SPAN (span valve), or

ZERO (zero valve). The choice is based on the valve the operator wants to open.

Selecting CYCLE starts an AZS cycle, which is discussed in Chapter 3. The actual valves actuated will depend upon the selection of CALIBRATION: INTERNAL or

EXTERNAL.

CALIBRATION

The choice of INTERNAL or EXTERNAL valves that will operate during a zero/span check. (The EZS valve option must be installed to use EXTERNAL.)

BACKGROUND

A choice of START, DISABLED or ENABLED. If START is selected, then when <Enter> is pressed the instrument begins an auto-zero (background) cycle. If

DISABLED is selected, then the instrument will not run the normal auto-zero

(background) cycle. If ENABLED is selected, then the instrument will run the normal auto-zero (background) cycle.

BACK. INTERVAL

Set time in HOURS (2, 4, 6, 8, 12, 24). A microprocessor-controlled

field that indicates when an autozero cycle will begin. The results of the background are stored in the EVENT LOG.

CO CAL PRESSURE

This is the measured ambient pressure during the last CO calibration.

2.5.6 Test Menu

OUTPUT TEST MENU DIAGNOSTIC MENU MEASUREMENT GAIN : 128 PRES/TEMP/FLOW COMP : ON DIAGNOSTIC MODE : OPERATE

CONTROL LOOP : ENABLED TEST MEASURE : 0 CO : 0.00000 PPM

Note

The background cycle must not be disabled for U.S. EPA designated use.

TEST MENU

98307600 Rev. C-1 2-23

Figure 2-13. Test Menu

EC9830 CO ANALYZER OPERATION MANUAL

The TEST MENU includes a series of submenus containing information and control settings for testing and verifying instrument functions. The operator can make changes to settings; however, when the instrument is returned to normal operation, the instrument’s automatic control function resumes. Changes made from this menu are for diagnostic and test purposes only.

MEASUREMENT GAIN

Entries are microprocessor controlled settings of 1, 2, 4, 8, 16, 32, 64, and

128.

PRES/TEMP/FLOW COMP

Set to either ON or OFF. OFF is used when running diagnostics to see fluctuations in readings. ON is used to compensate for environmental fluctuations that might affect readings.

DIAGNOSTIC MODE

Allows the operator to choose OPERATE, OPTIC, ELECT, or PREAMP. During measurement, set to OPERATE. During diagnostic testing, set to the system to be diagnosed.

CONTROL LOOP

Allows the operator to choose ENABLED or DISABLED. When ENABLED is selected, the microprocessor maintains control of the digital pots; when DISABLED is selected, the microprocessor does not control the digital pots and the user can manually adjust the digital pots. When CONTROL LOOP is ENABLED, the microprocessor will take control of the pots at the point at which the pots were last set. CONTROL LOOPS will be set to ENABLED when the primary screen is

displayed.

TEST MEASURE

Software-controlled pot that is used by technicians when troubleshooting, or verifying correct instrument performance. This option only appears when the diagnostic mode is set to OPTIC, ELECT or PREAMP.

Gas concentration reading during diagnostics. This option only appears when the diagnostic mode is set to OPTIC, ELECT or PREAMP.

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2.5.7 Output Test Menu

PREPROCESSOR POTS FLOW CONTROL POTS VALVE TEST MENU

Figure 2-14. Output Test Menu

The OUTPUT TEST MENU reports readings for digital potentiometers and valves. The FLOW CONTROL POTS menu does not appear on the B series analyzer.

2.5.8 Preprocessor Pots Screen

MEASURE COARSE ZERO : 61 MEASURE FINE ZERO : 47 INPUT : 45 TEST REFERENCE : 0 TEST MEASURE : 0

REF. VOLTAGE 3.806 VOLTS CO 0.00 PPM CONC.VOLTAGE 1.514 VOLTS

CHAPTER 2, INSTALLATION AND OPERATION

OUTPUT TEST MENU

PREPROCESSOR POTS

Figure 2-15. Preprocessor Pots Screen

PREPROCESSOR POTS are electronically-controlled digital potentiometers used for

adjustments to operations of the preprocessor board. Each pot is set with digits 0-99 in a non-wraparound scrolling field.

MEASURE COARSE ZERO

Software-controlled pot for the coarse electronic zero of the measure channel.

MEASURE FINE ZERO

Software-controlled pot for the fine electronic zero of the measure channel.

INPUT

Sets gain for the input signal from the detector and is controlled by the microprocessor board.

TEST REFERENCE

Software controlled pot for the gain of the reference channel. Used during troubleshooting.

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EC9830 CO ANALYZER OPERATION MANUAL

TEST MEASURE

Software-controlled pot for the gain of the measure channel. Used by technicians when troubleshooting.

REF. VOLTAGE

Reference voltage as measured by the preamplifier board. This is indicative of IR signal strength.

PPM: Gas concentration reading.

CONC. VOLTAGE

Instrument-generated voltage corresponding to gas concentration. This voltage represents the actual gas measurement.

2.5.9 Flow Control Pots Screen (A series only)

FLOW CONTROL POTS are potentiometers used to adjust the functions of the flow

control board.

FLOW CONTROL POTS

FLOW CONTROL ZERO : 81 FAN SPEED CONTROL : 16 PUMP SPEED FINE : 85 PUMP SPEED COARSE : 62

GAS FLOW 1.00 SLPM GAS PRESSURE 585.6 TORR

Figure 2-16. Flow Control Pots Screen

FLOW CONTROL ZERO

A pot that sets electronic zero for differential flow. The pot value is stored in EEPROM on flow controller board.

FAN SPEED CONTROL

Software-controlled pot that sets chassis fan speed.

PUMP SPEED FINE

Software-controlled pot that controls the pump speed (which controls sample flow rate).

PUMP SPEED COARSE

Software-controlled pot that controls the pump speed (which controls sample flow rate).

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CHAPTER 2, INSTALLATION AND OPERATION

GAS FLOW

Instrument-generated information from the flow controller.

GAS PRESSURE

Atmospheric pressure; instrument-generated information.

2.5.10 Valve Test Menu

VALVE TEST MENU

INT. VALVE #1 : OPEN INT. VALVE #2 : CLOSED INT. VALVE #3 : CLOSED AUX. VALVE #1 : CLOSED

EXT. MEASURE : CLOSED EXT. ZERO GAS : CLOSED EXT. SPAN GAS : CLOSED

VALVE SEQUENCING : ON

Figure 2-17. Valve Test Menu

The VALVE TEST MENU allows the valves to be set to either OPEN or CLOSED according to the operator's choice. To manually operate the valves, VALVE

SEQUENCING needs to be turned off.

INT. VALVE #1

Sample stream.

INT. VALVE #2

Internal zero stream.

INT. VALVE #3

Span stream.

AUX. VALVE #1

Not used at this time.

EXT. MEASURE

Externally supplied sample stream (used with the EZS valve option).

EXT. ZERO GAS

Externally supplied zero air (used with the EZS valve option.)

EXT. SPAN GAS

Externally supplied span gas (used with the EZS valve option).

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EC9830 CO ANALYZER OPERATION MANUAL

VALVE SEQUENCING

Set to either ON or OFF. ON is used for automatic valve control of zero/span cycles. OFF is used for operator control of valves. VALVE SEQUENCING will automatically be set to ON whenever the primary screen is displayed.

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CHAPTER 2, INSTALLATION AND OPERATION

2.5.11 Diagnostic Menu

DIAGNOSTIC MENU

MULTIDROP PORT TEST : NO WATCHDOG TEST : NO DISPLAY TEST : NO ANALOG OUTPUT TEST : NO

Figure 2-18. Diagnostic Menu

The DIAGNOSTIC MENU is information used to diagnose problems or suspected problems. The settings return to the previously set conditions when the operator leaves this menu.

MULTIDROP PORT TEST

Sends test of all printable characters to the Multidrop (rear) serial ports.

WATCHDOG TEST

Disables strobes to the watchdog timer. The system resets when this test is executed.

DISPLAY TEST

A series of 6 tests are available to check the working order of the display screen. Once the test is selected press the <Select> key to verify that the alternate pixels are visible. Press the <Pg Up> key to exit. The available tests are:

STRIPE 1

Causes the screen to show a series of very closely spaced vertical lines.

STRIPE 2

Shows a series of vertical lines in alternate positions to those is STRIPE 1.

CLEAR

Clears the screen of all pixels.

FILL

Fills the screen of pixels.

CHECK 1

Causes the screen to show a checkered pattern made up of single pixels.

CHECK 2

Displays a checkered pattern in alternate spaces to CHECK 1.

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EC9830 CO ANALYZER OPERATION MANUAL

ANALOG OUTPUT TEST

Sends a 0.1 Hz sawtooth waveform to the selected analog output device to test its functionality. There are 6 analog outputs to choose from (#1 to #6). Analog outputs

#1 to #3 are available via the 50 PIN IO connector.

2.5.12 Calculation factors

INSTRUMENT GAIN : 1.0592 P/T/F CORRECTION : 1.0390 BACKGROUND : 0.0012 ZERO OFFSET : 0.0000 PPB

EXIT

Figure 2-19. Calculation Factors Menu

The Calculation factors screen is a non editable screen which provides the values used to calculate different aspects of measurement and calibration.

2.5.13 Interface Menu

CALCULATION FACTORS

INTERFACE MENU

ANALOG OUTPUT MENU DATA LOGGING MENU MAIN GAS ID : 030 INTERFACE MODE : COMMAND MULTIDROP BAUD : 2400 DATA LENGTH : 8 BITS STOP BITS : 1 BIT PARITY : NONE COMM. PROTOCOL : ORIGINAL

Figure 2-20. Interface Menu

The INTERFACE MENU is used for adjustments related to the interfacing instruments.

The following are used only when one or more of the serial ports are to be used. See output connections information in Chapter 4, Digital Communication.

MAIN GAS ID

The ID address of the analyzer when Multidrop RS232 communications is used.

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CHAPTER 2, INSTALLATION AND OPERATION

INTERFACE MODE

This establishes the RS232 communication mode. Choices are COMMAND or

TERMINAL. TERMINAL uses the menu structure, and COMMAND uses the EC Serial

Command Set.

MULTIDROP BAUD

The communication rate for RS232 (DB9) connectors on rear panel. The available rates are 1200, 2400, 4800, 9600, 19200 and 38400.

DATA LENGTH

Sets the number of data bits used in serial transmissions. The available lengths are

7 and 8.

STOP BITS

Sets the number of stop bits used in serial transmissions. The available number of stop bits are 1 and 2.

PARITY

Sets the parity used in serial transmissions. The available choices are NONE,

EVEN, and ODD.

COMM. PROTOCOL

Sets the communication protocol in serial transmissions. The available choices are

ORIGINAL, BAVARIAN, and ENHANCED. See the serial communications

information in Chapter 4, Digital Communication.

2.5.14 Analog Output Menu

The ANALOG OUTPUT MENU contains settings that relate to the recording devices. For a detailed explanation of the analog output, see section 2.6.3 below. The

setting of analog output ranges has no impact on the measurement range of the analyzer; it only affects the analog output scaling.

2.5.14.1 CO Current Output Menu

RANGE : 50.00 PPM OUTPUT TYPE : CURRENT CURRENT RANGE : 0-20 MA FULL SCALE : 0.00 % ZERO ADJUST : 0.00 % OVER RANGE : 200.00 PPM OVER-RANGING : DISABLED

CO OUTPUT MENU

98307600 Rev. C-1 2-31

Figure 2-21. Analog Output Menu

EC9830 CO ANALYZER OPERATION MANUAL

RANGE

Set upper range limit (in digits) to desired CO concentration. See section 2.6. This value cannot be set above the OVER RANGE value.

OUTPUT TYPE

Setting must match the choice on the 50-Pin I/O board (if installed), current or voltage.

CURRENT RANGE

Choices are 0-20, 2-20, and 4-20 mA.

FULL SCALE

X.XX%, a correction factor for full scale setting. Used when calibrating the analog

outputs.

ZERO ADJUST

X.XX%, a correction factor for the zero setting. Used when calibrating the analog

outputs.

OVER RANGE

Set to desired over-range value. This value cannot be set below the RANGE value. See section 2.6. This is the alternate scale the recorder or DAS indicates when over-ranging is enabled. (When 90% of the set range is reached, this automatic range is effective. When 80% of the original range is reached, it returns to the original range.)

OVER-RANGING

Set to ENABLED or DISABLED to turn the over-ranging feature on or off.

2.5.14.2 CO Voltage Output Menu

CO OUTPUT MENU

RANGE : 50.00 PPM OUTPUT TYPE : VOLTAGE OFFSET : 0 % FULL SCALE : 0.00 % ZERO ADJUST : 0.00 % OVER RANGE : 200.00 PPM OVER-RANGING : DISABLED

Figure 2-22. Analog Output Menu (Voltage Output)

RANGE

Set upper range limit (in digits) to desired CO concentration. See section 2.6. This value cannot exceed the OVER RANGE value.

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CHAPTER 2, INSTALLATION AND OPERATION

OUTPUT TYPE

Setting must match the choice on the 50-pin I/O board (if installed); CURRENT or

VOLTAGE.

OFFSET

Choices are 0%, 5%, and 10%. Recorder or DAS outputs will reflect this.

FULL SCALE

X.XX%, a correction factor for full scale setting. Used when calibrating the analog

outputs.

ZERO ADJUST

X.XX%, a correction factor for the zero setting. Used when calibrating the analog

outputs.

OVER RANGE

Set to desired over range value. This value cannot be set below the RANGE value. See section 2.6. This is the alternate scale the recorder or DAS indicates when over-ranging is enabled. (When 90% of the set range is reached, this automatic range is effective. When 80% of the original range is reached, it returns to the original range.)

OVER-RANGING

Set to ENABLED or DISABLED to turn the over-ranging feature on or off.

2.5.15 Data Logging Menu

DATA LOGGING MENU

AVERAGE DATA : OFF INST. DATA : OFF

TOTAL CAPACITY : 0.0 DAYS ERASE LOGGED DATA: NO

Figure 2-23. Data Logging Menu

The DATA LOGGING MENU contains settings that relate to the internal data recording facilities of the EC9830. This data can latter be retrieved using the Ecotech data downloading software mentioned in section 4.6.

AVERAGE DATA

If the average data is set to off, no average data is recorded. If it is set to on, then the average data displayed on the primary screen is recorded. The averaging period of this data is set in the MEASUREMENT MENU.

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1 35

INST. DATA

The INST. DATA option allows you to select either off (where no data is recorded) or record instantaneous data with the following intervals: 1 HOUR, 30

MINUTES, 10 MINUTES, 5 MINUTES, 3 MINUTES OR 1 MINUTE.

TOTAL CAPACITY

When either of the above is set to on, the amount of free memory available for data logging will be displayed in days. This indicates how much data can be stored, before the earliest data will start to be overwritten.

Inst. Data

(min)

Total Capacity

(days)

3 106

5 176 10 353 30 1061 60 2123

ERASE LOGGED DATA

When yes is selected and enter is pressed, all the logged data will be erased.

2.5.16 Network Adaptor Menu.

The Network Adaptor Menu allows the user to enter or change the I.P. address, Netmask and Gateway.

NETWORK ADAPTER MENU

I.P. ADDRESS 0. 0. 0. 0. NETMASK 0. 0. 0. 0. GATEWAY 0. 0. 0. 0.

2.5.17 Trend Select Menu

TREND SELECT MENU is the graphic display of the parameters listed.

CONCENTRATION AVG CONCENTRATION REFERENCE ZERO OFFSET SPAN COMPENSATION SAMPLE FLOW SAMPLE PRESSURE

2-34 98307600 Rev. C-1

TREND SELECT MENU

Figure 2-24 Trend Select Menu

CHAPTER 2, INSTALLATION AND OPERATION

Each graph is displayed as an x-y plot with the x-axis 0 being the current time and the most distant number being the most historic data.

2.5.18 Event Log Screen

EVENT LOG

# 1 BACKGROUND CYCLE OCCURRED AT 13:38 02-DEC-03

# 2 ZERO FLOW OCCURRED AT 12:51 02-DEC-03

# 3 CHOPPER WHEEL ERROR OCCURRED AT 17:02 02-DEC-03

# 4

Figure 2-25. Event Log Screen

The EVENT LOG screen displays notations of key events such as auto-zero and calibration or specific error conditions for up to 100 occurrences. This screen is a first in, last out type screen. The first entry is the latest occurrence. You can scroll through the events using the Up or Down arrow keys ( or ).

2.5.19 Instrument Status Screen

INSTRUMENT STATUS

GAS FLOW : 1.00 SLPM GAS PRESSURE : 617.6 TORR REF. VOLTAGE : 3.806 VOLTS CONC. VOLTAGE : 1.327 VOLTS ANALOG SUPPLY : 11.715 VOLTS DIGITAL SUPPLY : 4.977 VOLTS

VERSION 1.03.0002 EXIT

Figure 2-26. Instrument Status Screen

INSTRUMENT STATUS is information continuously generated by the

microprocessor for various parameters.

GAS FLOW

Calculated gas flow. Will indicate 0.00 if the flow transducer senses flow has gone to zero.

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EC9830 CO ANALYZER OPERATION MANUAL

GAS PRESSURE

Current Gas pressure – should be a little below current barometric pressure.

REF. VOLTAGE

Reference voltage as measured by the preamplifier board. This voltage is indicative of the IR signal intensity.

CONC. VOLTAGE

Voltage from the preprocessor proportional to the detected gas signal from the reaction cell. This voltage is represents the actual measurement of gas.

ANALOG SUPPLY

+12 volt (primary) power supply.

DIGITAL SUPPLY

+5 volt microprocessor power supply.

VERSION

Indicates the current firmware version installed in the Microprocessor.

Additional information on the INSTRUMENT STATUS screen is provided in the EC9830 Service Manual.

2.5.20 System Temperatures Screen

SYSTEM TEMPERATURES

CELL TEMP. : 50.9 DEG C CONV. TEMP : 90.2 DEG C CHASSIS TEMP. : 35.1 DEG C FLOW TEMP. : 47.4 DEG C COOLER TEMP. : 1.2 VOLTS MIRROR TEMP. : 49.2 DEG C

EXIT

Figure 2-27. System Temperatures Screen

The SYSTEM TEMPERATURES display is information continuously generated by the microprocessor.

CELL TEMP.

Temperature of the reaction cell.

CONV. TEMP.

Temperature of the CO-CO2 converter.

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CHASSIS TEMP.

EXIT

Temperature of air inside the chassis, measured on the microprocessor board.

FLOW TEMP.

Temperature of the flow control/ pressure board.

COOLER TEMP.

Voltage drop sensed across the thermoelectric cooler. Measured as a voltage.

MIRROR TEMP.

Temperature of the end-cap mirror plate on the reaction cell.

Additional information on the SYSTEM TEMPERATURES screen is provided in the EC9830 Service Manual.

2.5.21 System Faults Screen

CELL TEMPERATURE START SAMPLE GAS FLOW: PASS FLOW BLOCK TEMP: PASS A/D INPUT: PASS 12 VOLT SUPPLY: PASS REFERENCE VOLTAGE: PASS CONVERTER TEMP: PASS COOLER & IR SOURCE: PASS CHOPPER WHEEL: PASS MIRROR TEMP: PASS

CHAPTER 2, INSTALLATION AND OPERATION

SYSTEM FAULTS

Figure 2-28. System Faults Screen

The SYSTEM FAULTS display provides a start, pass or fail indication for various parameters which are continually monitored. These parameters must be within acceptable operating ranges in order to display PASS. If the instrument is in startup mode, START will be displayed. For further information on the SYSTEM FAULTS screen, refer to the EC9830 Service Manual.

2.6 Analog Output

Analog output connections are described in section 2.1.2.1.

Before setting up the recorder and DAS analog outputs, decide what offset and over-ranging choices to make. A brief explanation of these terms follows, then the setup procedure is given. The analog output and over-range settings have no

impact on the measurement range of the analyzer, but only affect the analog output scaling.

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2.6.1 Offset and Live Zero

At any selected output range, the operator may want to observe negative signal indications. Moving the zero indication up the scale to a specific point creates a live zero, thus allowing the recorder or DAS to show negative as well as positive indications.

The adjustment used to create a live zero is OFFSET. For example, a 10% offset moves the zero indication to the point where 10% would normally be indicated. The full reading available on the recorder paper or DAS would then be -10% to +90% of full scale. See Figure 2-29, an illustration of offset on the strip chart recorder.

Figure 2-29. Strip Charts Illustrating Offset

Signal adjustments for zero and instrument gain to align the output with the user’s recorder or other measurement device can be made in the ANALOG OUTPUT MENU in the fields FULL SCALE and ZERO ADJ. These adjustments may be necessary due to tolerance buildup, power supply variation, etc in either the analyzer or the measurement device.

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2.6.2 Over Range Adjustment

Over-ranging is also enabled from the ANALOG OUTPUT MENU. The OVER RANGE setting is the auxiliary range the operator chooses to track the data should the data exceed full scale of the original range. The over-range setting has no impact on

the measurement range of the analyzer; it only affects the analog output scaling.

With over-ranging enabled, as the concentration reaches 90% of the full scale value for the selected output range, the software generates a positive spike that takes the indicator from the 90% position to the 100% position. The output data is then scaled for the full scale chosen for over-range. As the output drops back to 80% of the original full scale, the software generates a negative spike from the displayed value to zero. The output then reverts to the original range. See Figure 2-30 for an example of over-range on a typical strip chart recorder.

CHAPTER 2, INSTALLATION AND OPERATION

The range value should generally be set first. However, because the range value must be less than the currently selected over-range value, it may be necessary to increase the over-range value to the desired setting first. The over-range value is limited to be equal to or greater than the currently selected range value. For practicality, it is recommended that the over-range be set to a value between 2 and 5 times the range value. For example, if the desired monitoring range is 0.2 ppm, the over-range should be set between 0.4 and 1.0 ppm.

98307600 Rev. C-1 2-39

Figure 2-30. Over Range as Seen on a Strip Chart Recorder

EC9830 CO ANALYZER OPERATION MANUAL

Certain precautions must be taken when over-ranging is enabled to ensure that pollutant concentration measurements are reported correctly. When a data acquisition system must interface with the analog output of the instrument, some means must be provided to indicate which range is in effect during all measurements. The user should monitor pin 7 on the 50-pin I/O connector, which is an open collector output indicating analog output #1 is in over-range.

2.6.3 Analog Output Calibration Procedure

This procedure is appropriate for connecting the EC9830 analyzer to a strip cart recorder, Data logger (DAS) or to a Digital voltmeter (DVM).

1. Enter the INTERFACE MENU and choose ANALOG OUTPUT MENU.

2. Select RANGE and enter the desired range by selecting the appropriate digits. Press <Enter> to confirm your choice.

3. Set the output type according to the termination selected for the discrete I/O connector. The choice will be either CURRENT or VOLTAGE.

If current output is desired and the 50-pin board is installed, set the selection jumper to CURRENT and de-select all voltage ranges. If current output is desired and the 50-pin board is not installed, no hardware change is required.

If voltage output is desired and the 50-pin board is installed, set the selection jumper to VOLTAGE. If voltage output is desired and the 50-pin board is not installed, an external termination resistor is required. This resistor must be 50 ohms per full scale voltage desired (50 ohms = 1 volt full scale; 500 ohms = 10 volts full scale, etc).

4. If voltage output type was selected, choose the desired OFFSET and press <Enter>. If current output type was selected, choose the desired output range and press <Enter>.

5. Select ZERO ADJUST and adjust the analog output to the selected offset position for zero concentration (i.e., if 10% offset is selected, the recorder pen or DAS should be at 10% of full scale). To make the adjustment, watch the recorder paper or DAS while you increment or decrement the zero adjustment correction factor that is displayed. Press <Enter> to confirm your setting.

6. Select FULL SCALE and adjust the analog output to 100% on the recorder paper or DAS. To make this adjustment, watch the recorder paper or DAS while you increment or decrement the full scale correction factor that is displayed. Press <Enter> to confirm your setting.

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7. Select OVER RANGE and set to a range that is higher than the RANGE chosen at the top of the screen. When the digits reflect the desired over-range, press <Enter>.

8. Select OVER-RANGING and choose either ENABLED or DISABLED. Press <Enter>.

2.6.4 Calibration Requirements

To make your data acceptable to the regulatory authorities and to pass required periodic audits, you must calibrate the instrument before any data is collected for use in a monitoring program. The calibration procedure is included in Chapter 3 of this manual.

Most regulatory requirements also include establishing a calibration verification program. If your organization does not have the staff to perform this task, Ecotech’s Service personnel can provide assistance. See the front of this manual for contact details.

CHAPTER 2, INSTALLATION AND OPERATION

2.7 Password Protection

A password protection option was designed in order to solve the problem of altering the configuration of the machine by the user. This option prevents the user from configuring the EC9800 menus by creating an individual password. This feature allows the user to exclude changes to the front panel menus by locking them through a user-specified password.

2.7.1 Rules of Operation

 The password must be a four-digit number.  After a memory erasure, the analyzer will default to UNLOCKED.  The user must enter a four-digit number to lock the analyzer. The same four-

digit number is used to unlock the analyzer as well.

 Once the analyzer is locked, the user may navigate through the menus, but

cannot select a field for data entry.

 Each time the user wishes to lock the analyzer, the password must be entered.

The password is only valid while the analyzer remains locked; previous passwords are not remembered.

 On the INSTRUMENT MENU there is a new entry labeled PASSWORD that displays

the status of the menu as either UNLOCKED or LOCKED.

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EC9830 CO ANALYZER OPERATION MANUAL

2.7.2 Sample Session

1. At INSTRUMENT MENU there is a field labeled PASSWORD. This should display the status UNLOCKED.

2. Select the field labeled PASSWORD. The status UNLOCKED will be replaced by

0000.

3. Using the <Select> and arrow keys scroll to the desired numbers to represent the password.

4. When the desired password appears, press the <Enter> key. The password will disappear and the LOCKED message will take its place. The analyzer is now locked.

5. Scroll through the instrument menus. From this point forward, it is impossible to select any alterable fields.

6. Return to the INSTRUMENT MENU and select the PASSWORD field.

7. The LOCKED message will disappear and 0000 appears in its place.

8. Using the <Select> and arrow keys scroll the numbers of the password entered previously.

9. When the password is displayed, press the <Enter> key. The password will disappear and be replaced by the message UNLOCKED.

10. The analyzer is unlocked and the menu configuration can be altered.

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CHAPTER 2, INSTALLATION AND OPERATION

98307600 Rev. C-1 2-43

3.0 Calibration

3.1 Overview

The calibration chapter consists of:

 a general discussion of calibration  a description of the multipoint calibration procedure  a description of automatic zero/span (AZS) setup  a discussion of the AZS feature.

The EC9830 carbon monoxide analyzer is a precision measuring device which must be calibrated against a known source of carbon monoxide that is traceable to a National Institute of Standards and Technology (NIST) standard. (Formerly NIST was the National Bureau of Standards, or NBS.)

In general terms, the calibration process consists of the following steps:

CHAPTER 3, CALIBRATION

1. Establish a reliable and stable calibrating source.

2. Provide a satisfactory connection between the calibration source and the analyzer.

3. Calibrate the analyzer against the calibration source.

Multipoint calibration is used to establish the relationship between analyzer response and pollutant concentration over the analyzer's full scale range. Zero and span checks are frequently used to provide a two-point calibration or an indication of analyzer stability and function.

Regulations generally require that the analyzer be recalibrated any time it is moved or serviced, or whenever analyzer characteristics may have changed. This includes changing the instruments units from volumetric to gravimetric. Regulatory agencies establish the time intervals at which the analyzer must be calibrated to ensure satisfactory data for their purposes.

Important

Use of the EC9830 CO analyzer as a U.S. EPA designated reference method requires periodic multipoint calibration in accordance with the procedure described below. In addition, the instrument must be set to the parameters indicated in Chapter 1, Introduction.

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EC9830 CO ANALYZER OPERATION MANUAL

3.1.1 Analyzer Calibration Instructions

This procedure is a quick guide to span calibration of the EC9830 analyzer, intended for operators who are familiar with gas analyzers and preparation of calibration gas. For complete gas preparation and multipoint calibration instructions, refer to section 3.2 below.

1. Connect a source of span calibration gas to the analyzer through the Inlet

port. (See the remainder of this section for instructions on preparing calibration gas.)

2. Allow the analyzer to sample the gas until a stable reading is obtained,

typically 15 minutes.

Note

3. From the primary screen, start the calibration sequence by pressing either the

Up or Down arrow key ( or ) until the display prompts START MANUAL

CALIBRATION. Pressing the <Select> key will allow you to choose from: NO, SPAN or ZERO. Confirm that the display reads SPAN and press <Enter> (↵). A

backlit cursor will be displayed on the CO concentration display.

4. Use the <Select> key to move the position of the backlit cursor, and the Up

and Down arrow keys to increment and decrement the value of the backlit digit until the calibration concentration value is obtained. When the desired concentration is displayed, press <Enter>.

5. Then move the backlit cursor to the INSTRUMENT GAIN field. The instrument

gain is automatically calculated by the analyzer. Press <Enter> to confirm this value. Press <Exit> to return to the primary screen.

This completes the span calibration of the EC9830 analyzer.

Note

The auto-zero function of the EC9830 eliminates the need for a traditional zero calibration. In special applications where a zero calibration is required the following procedure can be used:

1. Connect a source of zero air to the analyzer through the Inlet port.

2. Allow the analyzer to sample zero air until a stable reading is obtained,

typically 15 minutes.

3-2 98307600 Rev. C-1

3. From the primary screen start the zero calibration sequence by pressing either

the Up or Down arrow ( or ) until the display prompts START MANUAL

CALIBRATION? ZERO. Confirm that the display reads ZERO and press <Enter>

(↵). A backlit cursor will be displayed on the CO Concentration display.

4. Use the <Select> key to move the position of the backlit cursor, and the Up

and Down arrow keys to increment and decrement the value of the backlit digit until the zero gas concentration value is displayed (e.g. 0.00 PPM). When the desired concentration is displayed, press <Enter>. Press <Exit> to return to the primary screen.

3.2 Multipoint Calibration Procedure

Before beginning a multipoint calibration of the instrument, a qualified service technician must perform the periodic maintenance procedures in the EC9830 Service Manual, especially checking the particulate filter. The INSTRUMENT

STATUS and SYSTEM TEMPERATURE screens in the EC9830 Service Manual give

the ranges for correct operation of the instrument.

CHAPTER 3, CALIBRATION

Note

Calibration should only be performed when the instrument is stable and has been powered up for at least three hours.

3.2.1 Procedure Using Cylinder Gas Dilution Method

3.2.1.1 Principle

A certified standard cylinder of CO, diluted as necessary with zero air, is used to obtain the various calibration concentrations needed.

3.2.1.2 Apparatus

The major components and typical configurations of the calibration systems for the two calibration methods are shown in Figure 3-1 and Figure 3-2 below.

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EC9830 CO ANALYZER OPERATION MANUAL

Figure 3-1. Dilution Method for Calibrating CO Analyzers

3.2.1.2.1 Flow Controller(s)

Device capable of adjusting and regulating flow rates. Flow rates for the dilution method (Figure 3-1) must be regulated to ±1%.

3.2.1.2.2 Flowmeter(s)

Calibrated flowmeter capable of measuring and monitoring flow rates. Flow rates for the dilution method (Figure 3-1) must be measured with an accuracy of ±2% of the measured value.

3.2.1.2.3 Pressure Regulator(s) for Standard CO Cylinder(s)

Regulator must have a non-reactive diaphragm and internal parts and a suitable delivery pressure.

3.2.1.2.4 Mixing Chamber

A chamber designed to provide thorough mixing of CO and diluent air for the dilution method.

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CHAPTER 3, CALIBRATION

3.2.1.2.5 Output Manifold

The output manifold should be of sufficient diameter to ensure an insignificant pressure drop at the analyzer connection. The system must have a vent designed to ensure atmospheric pressure at the manifold and enough inlet flow to prevent ambient air from entering the manifold.

3.2.1.3 Reagents

3.2.1.3.1 CO Concentration Standard(s)

Cylinder(s) of CO in air containing appropriate concentration(s) of CO suitable for the selected operating range of the analyzer under calibration; CO standards for the dilution method may be contained in a nitrogen matrix if the zero air dilution ratio is not less than 100:1. The assay of the cylinder(s) must be traceable either to a National Institute of Standards and Technology (NIST) CO in air Standard Reference Material (SRM) or to an NIST/EPA approved commercially available Certified Reference Material (CRM). CRM’s are described in Calibration Reference 2, and a list of CRM sources is available from the address shown for Calibration Reference 2. A recommended protocol for certifying CO gas cylinders against either a CO SRM or a CRM is given in Calibration Reference 1. CO gas cylinders should be recertified on a regular basis as determined by the local quality control program.

3.2.1.3.2 Dilution Gas (Zero Air)

Zero air is described as air free of contaminants which will cause a detectable response on the CO analyzer. The zero air should contain <0.1 ppm CO. A procedure for generating CO zero air is given in Calibration Reference 1; the Ecotech GasCal 1000 calibrator and 8301 Zero Air source calibrator has CO-free air capability sufficient for this operation.

3.2.1.4 Procedure Using Dynamic Dilution Gas Method

1. Assemble a dynamic calibration system such as the one shown in Figure 3-1. All calibration gases including zero air must be introduced into the sample inlet of the analyzer system. The EC9830 instrument sample inlet is labeled Inlet and is located on the rear panel.

2. Ensure that all flowmeters are properly calibrated, under the conditions of use, if appropriate, against an authoritative standard such as a soap-bubble meter or wet-test meter. All volumetric flow rates should be corrected to 25° C and 760 mm Hg (101 kPa). A discussion on calibration of flowmeters is given in Calibration Reference 1.

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EC9830 CO ANALYZER OPERATION MANUAL

3. Ensure that the analyzer is properly connected to the output recording device, as described in Chapter 2, Installation and Operation. If necessary, go to the

INTERFACE MENU, select the ANALOG OUTPUT MENU, and select the appropriate

settings for the recording device. Offsetting the analyzer's zero indication (OFFSET AND ZERO ADJUST) to +5% of scale is recommended to facilitate observing negative zero drift. Exit and return to the primary screen.

4. Adjust the calibration system to deliver zero air to the output manifold. The total air flow must exceed the total demand of the analyzer(s) connected to the output manifold by 0.5 slpm to ensure that no ambient air is pulled into the manifold vent. Go to the CALIBRATION MENU and select MANUAL calibration and MEASURE mode. Check the internal zero scrubber by initiating an autozero (BACKGROUND) cycle. Exit and return to the primary screen. Following the auto-zero cycle, allow the analyzer to sample zero air until a stable response is obtained. If the response is negative by more than 0.5% of full scale, the zero scrubber may need to be replaced. Record the final, stable zero air response as ZCO.

Note

Ecotech’s’ EC9800 analyzer family does not have zero and span pots that physically resemble those on traditional instruments. Zero is set automatically on all units. Span can be set manually by adjusting the instrument readings or by adjusting the instrument gain.

5. Adjust the zero air flow and the CO flow from the standard CO cylinder to provide a diluted CO concentration of approximately 80% of the full scale range of the analyzer. Ensure that the total air flow at the output manifold exceeds the demand by 0.5 lpm. This will ensure that no ambient air is pulled into the manifold vent. The exact CO concentration is calculated from:

F]CO[

]CO[

OUT

COSTD

COD

Equation 3-1

Where:

[CO] [CO]

= diluted CO concentration at the output manifold, ppm

OUT

= concentration of the undiluted CO standard, ppm

STD

FCO = flow rate of the CO standard corrected to 25° C and 760 mm Hg (101 kPa), slpm FD = flow rate of the dilution air corrected to 25° C and 760 mm Hg (101 kPa), slpm.

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CHAPTER 3, CALIBRATION

6. Sample the CO concentration until a stable response is obtained.

7. From the primary screen, press the Up or Down arrow key. Respond SPAN to the screen query START MANUAL CALIBRATION? by pressing the Up or Down arrow key, then <Enter>. The cursor now appears in the first digit of the concentration field.

8. Use the <Select> and arrow keys to input the CO span point concentration calculated in step 5 above. Use the <Select> key to select the digit to be changed and the Up or Down arrow keys to change the value.

9. Press <Enter> to confirm the input value. Record the CO concentration and the analyzer's stable response.

10. The cursor now appears in the INSTRUMENT GAIN field. Check to see that the

displayed value is within the recommended range (0.7 to 1.3), and record for future reference. Press the <Enter> or <Exit> key to return to the primary screen.

3.2.1.5 Procedure Using Multiple Cylinders

Figure 3-2. Multiple Cylinder Method for Calibrating CO Analyzers

Use the procedure for the dynamic dilution method with the following changes:

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EC9830 CO ANALYZER OPERATION MANUAL

1. Use a multi-cylinder system such as the typical one shown in Figure 3-2.

2. The flowmeter need not be accurately calibrated, provided the flow in the

output manifold exceeds the analyzer's flow demand.

3. The various CO calibration concentrations required in the multiple cylinder

method are obtained without dilution by selecting the appropriate certified cylinders. The suggested method is to span the instrument at the highest concentration, then perform a dynamic or multipoint calibration with the remaining cylinders, in sequence.

Note

The dilution method of section 3.2.1.4 is the recommended method by Ecotech.

3.2.2 Procedure for 5 Point Multipoint Calibration

3.2.2.1 Principle

Multipoint calibration consists of five (5) concentrations across the instruments operating range. The concentration levels are derived to determine the accuracy between calculated and expected values of the analyzer using a simple Excel spreadsheet. This procedure is only to be carried out on a 6 monthly basis or after the analyzer has had major repair, as per AS3580.7.1. and U.S.EPA Standards.

3.2.2.2 Apparatus

The apparatus discussed in section 3.2.1.2 above should be used to perform the Multipoint Calibration. In addition to this the following may also be used:

 NATA/NIST Traceable Temperature sensor  NATA/NIST Traceable Barometric sensor  NATA/NIST Traceable CO Gas cylinder with dual stage regulator.  Laptop Computer with Microsoft Excel.  Bios DryCal flow calibrator  Ecotech portable zero air source  Ecotech portable Dilution Gas Calibrator

3.2.2.3 Procedure

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CHAPTER 3, CALIBRATION

1. Connect the flowmeter to the analyzer sample inlet and measure the sample

flow reading. Record the average of flow readings and ensure that it meets the specifications of section 1.1.10 ±1%.

2. Setup the dilution gas calibrator to obtain a CO gas concentration of 80% of

the EC9830’s operating range as discussed in section 3.2.1.4. Perform a manual calibration at this point.

Note

Record the analyzer instruments gains before and after the calibration.

3. Setup the dilution gas calibrator to obtain Zero air, and ensure that the

EC9830 has a zero reading lower than ±5ppb NOTE: Perform a background otherwise and repeat step 2.

Note

Do not make any further span adjustments during the remainder of the calibration. Record the new span values in the spreadsheet.

4. Generate 5 additional concentrations by decreasing F

or increasing FD. Be

SO2

sure the total flow exceeds the analyzer’s total flow demand. For each concentration generated, calculate the exact CO concentration using 3.2.1.4

Note

The recommended multipoint span concentrations are: 20, 40, 60, 80, 100% of Full Scale @ minimum of 1LPM.

5. Record the concentration and the analyzer’s response for each concentration

after a stabilization period of 15 minutes per point.

6. Plot the analyzer’s responses versus the corresponding CO concentrations and

draw or calculate the calibration curve as discussed in the following section.

3.2.2.4 Calculating Multipoint Calibration Results

3.2.2.4.1 Manual Calculations (Used when Excel not available)

Determine the percent difference between instrument response and the calculated concentration using the following equation.

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EC9830 CO ANALYZER OPERATION MANUAL

ion

Concentrat

Calculated

ionConcentrat Calculated - Response Instrument

=×

DifferencePercent 100

If the difference between values is less than 1% then the instrument is within specifications. Otherwise a Leak Check and or service are required.

3.2.2.4.2 Using Microsoft Excel to Display Multipoint Calibration Results

Produce an X Y scatter plot of the data with the calculated CO concentration in the X axis and the instruments response concentration in the Y axis. Right mouse click on any data point to bring up the data formatting menu shown in Figure 3-3.

Figure 3-3. Data point formatting menu with Excel chart

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CHAPTER 3, CALIBRATION

Figure 3-4. Trendline menu in Excel

Select Add Trendline (Linear should be selected under the TYPE tab) and enter Options. Select the tick boxes that will display the equation and the R2 value on the chart (Figure 3-4). Clicking OK will return to the chart and display the required data necessary to determine the effectiveness of the calibration.

Figure 3-5. Excel chart showing equation with required criteria

Using the linear regression equation y = mx + b from the chart where:

y = instrument concentration (ppm) x = calculated value (ppm) m = gradient (gain)

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b = y-intercept (offset)

EC9830 CO ANALYZER OPERATION MANUAL

The R2 value is a correlation factor that relates to the similarity between the data points. Values close to 1 indicate a linear relationship, whereas a value close to zero will show a random distribution of data.

The calibration is accepted if:

 The gradient (m) falls between 0.98 and 1.02  The intercept (b) lies between ±0.3.  The correlation (R

) is greater than 0.9995

Reject the calibration if the above criteria are not met. If the calibration fails perform a leak check, check zero air scrubbers and consult the EC9830 service manual for troubleshooting assistance.

Note

3.2.3 Procedure Using Multiple Cylinders

Use the procedure for the dynamic dilution method with the following changes:

4. Use a multi-cylinder system such as the typical one shown in Figure 3-2.

5. The flowmeter need not be accurately calibrated, provided the flow in the

output manifold exceeds the analyzer's flow demand.

6. The various CO calibration concentrations required in the multiple cylinder

3.3 Calibration Requirements When Over-Ranging Is Employed

If you are utilizing the over-ranging feature of the analog outputs, use the following steps in conjunction with the procedure in section 3.2 to calibrate the instrument.

1. Choose desired upper range limit for the normal monitoring range (RANGE).

2. Choose and set the desired upper range limit for the higher, over range (OVER

RANGE). A value between 2 and 5 times the RANGE value is recommended.

3. Set OVER RANGE to DISABLED to deactivate the over-ranging feature.

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CHAPTER 3, CALIBRATION

4. Temporarily set the RANGE to equal the chosen OVER RANGE.

5. Check the zero and set the span as described in section 3.2.

6. Generate several concentration standards and determine the slope, intercept,

and linearity of the higher OVER RANGE.

7. Reset the RANGE to the normal monitoring range.

8. Generate several concentration standards (including zero air) and determine

the slope, intercept, and linearity of the lower RANGE.

Note

Once the span has been set on the higher range, no further adjustment should be made on the lower (normal) monitoring range.

9. Reset OVER-RANGING to ENABLED to reactivate the over-ranging feature.

3.4 Automatic Zero/Span Checks (AZS)

Over time, the calibration of the instrument may change slightly (drift) causing error in the measured values. Accordingly, good quality assurance practice requires that the calibration of the EC9830 be checked periodically and, if necessary, that the instrument's zero and span be adjusted to restore accurate calibration.

3.4.1 U.S. EPA Definitions

Section 2.0.9 of the QA Handbook for Air Pollution Measurement Systems defines two types of calibration checks: a Level 1 check and a Level 2 check.

A Level 1 zero and span calibration check is an authoritative assessment of the analyzer calibration, using a CO span gas standard that is certified traceable to an SRM or CRM, and the results of the Level 1 check can be used to adjust the analyzer zero and span to restore accurate calibration.

A Level 2 zero and span check is an informal calibration check, often with an uncertified CO standard, used to monitor the day-to-day relative readings of the analyzer. The results of a Level 2 check must not be used to adjust the analyzer calibration, but may indicate the immediate need for a more authoritative Level 1 calibration check.

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EC9830 CO ANALYZER OPERATION MANUAL

3.4.2 AZS Outline

When used with a certified traceable CO span standard and external zero standard, the EC9830 automatic zero/span (AZS) feature may be used to automatically carry out a Level 1 calibration check on a periodic basis. Further, when the SPAN COMP in the instrument is ENABLED, the EC9830 automatically and continually compensates subsequent concentration measurements for any minor calibration drift as follows:

Equation 3-2

Where:

]CO[f]CO[ ×=

UNCOMPAZSREAD

[CO]

= the corrected instrument concentration reading

READ

based on the span compensation ratio obtained during the previous AZS cycle [CO]

UNCOMP

= the instrument concentration reading without compensation f

= the span compensation ratio determined during the

AZS

previous AZS cycle (the default value of f

is 1.000 until the

AZS

first AZS cycle is carried out; see Equation 3-3).

]CO[

f =

AZS

STD

]CO[

UNCOMP

Equation 3-3

During an AZS cycle, the EC9830 measures the concentration of the span gas provided to the span gas port. This measurement reading should equal the actual concentration of the span gas standard. If it does not, the instrument sets [CO]

READ

= [CO]

[CO ]

and calculates a new f

STD

= the certified concentration of the span gas standard at the span

STD

as follows:

AZS

gas port.

The new value of f readings until the next AZS cycle.

The zero gas reading during an AZS cycle is used for reference purposes only. The reading is not used to compensate future values regardless of whether

COMPENSATION is ENABLED or DISABLED. The analyzer automatically runs a zero

cycle (background) at midnight using the internal zero scrubber and compensates future readings based on this value.

3-14 98307600 Rev. C-1

is then used to compensate subsequent measurement

AZS

CHAPTER 3, CALIBRATION

Use of a Level 1 span calibration (with SPAN COMP: ENABLED and

CALIBRATION: TIMED) adjusts the instrument gain so the output of the instrument

agrees with the concentration expected for span gas. The previously determined multipoint calibration curve is used to verify that the analyzer output is linear. Note that a Level 1 span calibration requires external zero and span standards connected via the (optional) EZS valve assembly.

It is recommended that the CO gas cylinder be checked against the previous instrument calibration curve immediately after the generation of the calibration curve (refer to Section 2.0.7 of Calibration Reference 1). It is also recommended that the concentration of this pollutant source be between 70% and 90% of the upper range limit of the analyzer and previous calibration curve. Subsequent use of this pollutant source, with AZS and compensation enabled, adjusts the span of the instrument to agree with the previous calibration line. Specific guidelines are contained in Calibration Reference 1 for use of Level 1 span checks (Section 2.0.9) and certification of gas cylinders to SRM/CRM sources (Section 2.0.7).

Note

Use of SPAN COMP: ENABLED is not allowed under U.S. EPA designation at this time.

A Level 2 span check (with SPAN COMP: DISABLED) does not require certification of the span gas used during AZS, and the result of such a check may not be used to correct the data, but merely serves to indicate that the analyzer is functioning properly. If the AZS is used for a Level 2 span check, the SPAN COMP must be set to DISABLED. A Level 2 AZS cycle should be initiated immediately after multipoint calibration so that a valid reference point can be determined.

As described in this section, two modes of operation are possible. In the INTERNAL mode, the internal zero air scrubber is used as the source of zero air. In the

EXTERNAL mode, the user must supply zero air through the Zero inlet of the

optional EZS valve. In the EXTERNAL mode, the Outlet port is connected with a short piece of tubing to the Inlet port.

In either mode, the user must supply the span gas. In the INTERNAL mode, the span gas is connected to the Auxiliary port of the instrument. In the EXTERNAL mode, the span gas is connected to the Span port of the instrument.

These gases (zero, if applicable, and span) must be provided to the analyzer at atmospheric pressure; for example, through a manifold as shown in Figure 3-1.

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EC9830 CO ANALYZER OPERATION MANUAL

3.4.3 AZS Setup

Note

In the CALIBRATION MENU the second

CALIBRATION field requires the designation of INTERNAL or EXTERNAL. This choice should be EXTERNAL only if the EZS valve assembly is

installed and gas is attached to the external Zero and Span ports.

1. Enter the CALIBRATION MENU.

2. At the first (upper) CALIBRATION prompt, select TIMED.

3. At the TIMER INTERVAL prompt, set the number of hours between timed

calibrations. Typical settings are 23 hours and 24 hours.

4. At the STARTING HOUR prompt, enter the hour of the day when AZS is to

commence.

5. At the prompt CYCLE TIME, enter the number of minutes required for the

span and zero steps to run.

6. At the CO TIMED SPAN prompt, enter the concentration value of the span gas

to be used.

7. At the second (lower) CALIBRATION prompt, choose INTERNAL (unless the

valve option is installed and you want to use the external calibrator gas). Using the INTERNAL choice, the span gas is connected to the Auxiliary port and the output of the zero air scrubber is used for zero air. If EXTERNAL is chosen, the span is connected to the Span port and user-supplied zero air is connected to the Zero port.

8. At the SPAN COMP prompt, select ENABLED if you want the instrument span

adjusted to agree with the span gas after each AZS cycle.

Note

Use of SPAN COMP ENABLED is not allowed under U.S. EPA designation at this time.

Caution

Setting an incorrect span gas value with SPAN

COMP enabled will cause all subsequent readings

to be incorrect.

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A built-in check verifies that the measured value is not different from the calibration value by more than 25%. If the difference is greater than 25%, no updated correction will be made and a message is sent to the EVENT LOG, setting the CALIBRATION ERROR flag.

The zero value is a reference value only. Regardless of the state of the SPAN COMP option, the AZS cycle does not correct for shifts in the zero reading.

The number displayed after CO SPAN RATIO is the factor by which the instrument gain is multiplied to cause the display and output to agree with the span gas, and will always be between 0.75 and 1.25. You cannot set this number. This value is reset to 1.000 any time that the span is set manually via the front panel. (The assumption is that front panel adjustment is an instrument calibration, thus preventing compound adjustments.)

3.4.4 Description of AZS Process

CHAPTER 3, CALIBRATION

Note

The instrument will initiate a full zero/span cycle starting at the prescribed hour. The valve to admit zero air will be opened and the sample valve closed. The instrument will allow the cell to fill with the gas for 12 minutes. During the first 10 minutes, no data is taken but the display and outputs are updated with the actual instrument reading. During the last 2 minutes, the instrument takes readings every second and averages them to yield a value to be stored as the zero calibration value.

At the end of 12 minutes, the zero air valve is closed and the span gas valve is opened, admitting the span gas for 12 minutes. During the first 10 minutes, no data is taken but the display and outputs are updated with the actual instrument readings. During the last 2 minutes, the instrument takes readings every second and averages them to yield a value to be stored as the span calibration value. If

SPAN COMP is set to ENABLED, this is the value which is used to correct all

subsequent readings to the calibration.

To purge the cell of span gas, the zero air valve is switched on for 5 minutes. The Sample valve is then activated for 1 minute to allow the cell to come back to monitoring concentration.

At the end of 30 minutes exactly, monitoring resumes including putting data in the average, etc. (The data averages are not updated during zero/span check.)

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3.5 Calibration References

1. Quality Assurance Handbook for Air Pollution Measurement Systems.

Volume II-Ambient Air Specific Methods, EPA-600/4-77-027a, US Environmental Protection Agency, Environmental Monitoring Systems Laboratory, Research Triangle Park, NC 27711, 1977.

2. A Procedure for Establishing Traceability of Gas Mixtures to Certain

National Bureau of Standard Reference Materials. EPA-600/7-81-010, US Environmental Protection Agency, Environmental Monitoring Systems Laboratory (MD-77), Research Triangle Park, NC 27711, January 1981.

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4.0 Digital Communication

The EC9830 has three methods of digital communication, serial communication using RS232 signals, Universal Serial Bus (USB),or discrete control over the 50-pin I/O. Discrete control is limited to lines which either command a specific operation or indicate an operation is in progress. Serial communication allows access to the menu structure using a terminal and also includes a library of other specific operations. USB provides a simple way to monitor the current state of the analyzer, and download data that has been logged to the internal FLASH memory.

4.1 Discrete Control

Two control inputs are available through the 50-pin I/O connector. They are

DOZERO and DOSPAN. These inputs will place the analyzer in either Zero mode or

Span mode, respectively, the analyzer will remain in the selected mode while the input is active. When these inputs are made active the analyzer will actuate the valve drivers selected in the CALIBRATION MENU for CALIBRATION INTERNAL/

EXTERNAL. All other discrete connections are status outputs from the analyzer.

CHAPTER 4, DIGITAL COMMUNICATION

4.1.1 50-Pin I/O Functional Specification

The 50-pin connector on the back of the instrument will have functions assigned to pins per the following table (Note 1):

Signal Name Number Function

IOUT3 DOZERO

2 Analog current output #3 (Note 2) 5 External input to put the instrument into the zero

mode.

DOSPAN

6 External input to put the instrument into the span

mode.

OVERANGE1

7 Active output indicates that analog output #1 has

gone into over-range.

OVERANGE2

8 Active output indicates that analog output #2 has

gone into over-range.

OVERANGE3

9 Active output indicates that analog output #3 has

gone into over-range.

ANAIN1 ANAIN2 IOUT1 IOUT2

10 Unused analog input #1. 11 Unused analog input #2. 15 Analog current output #1 (Note 3). 17 Analog current output #2 (Note 4).

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Signal Name Number Function

SPANCYL

OUTSERV

ZEROON

SPANON

ZEROCYL

IZSON

STARTUP

PPM/MET

USERID1

USERID2

USERID3

USERID4

USERID5

USERID6

USERID7

USERID8

FLOWFAIL

LAMPFAIL

18 Active output indicates that the instrument is in

19 Active output indicates that the Out of Service

20 Active output indicates that the instrument is in

21 Active output indicates that the instrument is in

22 Active output indicates that the instrument is in

23 Active output indicates that Internal Zero/Span

24 Active output indicates that the startup sequence

25 Active output indicates that the instrument is in

26 USER ID byte bit 1. Used in conjunction with the

27 USER ID byte bit 2. Used in conjunction with the

28 USER ID byte bit 3. Used in conjunction with the

29 USER ID byte bit 4. Used in conjunction with the

30 USER ID byte bit 5. Used in conjunction with the

31 USER ID byte bit 6. Used in conjunction with the

32 USER ID byte bit 7. Used in conjunction with the

33 USER ID byte bit 8. Used in conjunction with the

35 Active output indicates that the sample flow is

36 Active output indicates that the lamp has failed

the Span or Span Fill mode.

switch is in the out-of-service position.

the Zero mode.

the Span mode.

the Zero or Zero Fill mode.

has been selected (Note 5).

is active.

mg/M3.

PINID serial command.

PINID command.

less than 0.1 slpm.

(Note 6).

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Signal Name Number Function

CHOPFAIL

37 Active output indicates that the chopper has failed

(Note 7).

SPAN_OOR

38 Active output indicates that the span ratio is out

of range (Note 8).

SPAREOC1 HEATERFAIL

39 Spare open collector output #1 40 Active output indicates that a system heater has

failed (Note 9).

SPAREOC2 OPTEST

41 Spare open collector output #2 42 Active output indicates that the system has been

put into the Optic Test mode.

ELECTST

43 Active output indicates that the system has been

put into the Electric Test mode.

PS-FAIL

44 Active output indicates that the 12-volt supply

voltage has gone out of range (Note 10).

HV-FAIL

45 Active output indicates that the PMT high voltage

supply has failed (Note 11).

SYSFAIL

46 The sum of all failures in the instrument

(Note 12).

POWER_ON

47 Active output indicates that power to the analyzer

is on.

SPDRVR1 AGND DGND PGND CGND +12V

48 Spare Driver #1

1,14,16 Ground reference for analog outputs.

13,34 Ground reference for digital inputs or outputs.

49 Chassis ground. 50 +12V (50 mA maximum).

CHAPTER 4, DIGITAL COMMUNICATION

3,4 Unused.

4.1.1.1 Notes

1. All outputs are open collector active LOW.

2. Analog output #3 is unused.

3. Analog output #1 is instantaneous gas concentration.

4. Analog output #2 is unused.

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5. Not valid.

6. An error is valid if the cooler voltage is below 0.5 volts or above 1.5 volts.

7. Valid.

8. Span ratio out of range is defined as calibration gain changing below 75% or

above 125% gain change.

9. An error is flagged if the mirror cell or flow block temperatures are below

35° C or above 60° C or if the converter temperature is less than 80° C or greater than 100° C.

10. An error is flagged if the 12-volt supply voltage is below 11.1 volts or greater

than 14.3 volts.

11. Unused.

12. This signal is the logical OR of FLOWFAIL, LAMPFAIL, CHOPFAIL, CVFAIL,

COOLERFAIL, HEATERFAIL, REFFAIL, PS-FAIL, and HV-FAIL.

4.1.2 50-Pin I/O Inputs

The DOZERO and DOSPAN controls (pins 5 and 6) are TTL compatible inputs with internal 4.7K ohm pull-up resistors. These inputs are active low and can be driven to ground by dry contact relays, open collectors or TTL compatible ICs. The logic levels for control inputs are standard TTL levels. They are:

low < 0.8 V 2 V < high < 5 V

4.1.3 50-Pin I/O Outputs

The status outputs are active low ULN2003 open collector Darlingtons. The status outputs can be used to drive relays or, with the use of external pull-up resistors, as a voltage indication of on/off conditions. The internal +12 V (pin 50) or an external power supply may used as the relay or indicator power source.

Current through the outputs should be kept as low as possible, ideally around 1 mA. If an external supply is used it should be less than 50 VDC, and the current sunk by each output should be <50 mA. If the internal +12 V supply is used the

total current drawn must be kept to less than 50 mA or damage to the analyzer will result.

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4.2 Serial Control

CHAPTER 4, DIGITAL COMMUNICATION

Figure 4-1. Status Output Connections

Two modes of operation are available using the serial interface. These modes are Terminal and Command. In Command mode, a library of commands becomes available. These are listed at the end of this chapter. In Terminal mode the instrument communication is through the analyzer menu structure.

4.2.1 Serial Connections

The EC9830 has two tristate RS232 ports on the rear of the analyzer. The tristate RS232 causes all instruments not addressed to turn off their transmission capability until the next activation command is received.

Communication among devices is defined in terms of Data Terminal Equipment (DTE) and Data Communication Equipment (DCE) per the EIA standard, RS232.

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4.2.2 Cable Connections

4-6 98307600 Rev. C-1

Figure 4-2. Serial Interface Connection Diagrams

4.3 Serial Terminal Control

If the EC9830 is operated in the Terminal mode, a terminal connected to one of the RS232 ports will produce the same results as pressing the six front panel keys with the exception that the same characters sent to the LCD instrument display will also be sent to the terminal. The terminal keys will map into the front panel keys as follows:

Key Key Label Function Enter 7 9 8 2 6

ENTER

HOME

PG UP

UP ARROW

DOWN ARROW

RT. ARROW

CHAPTER 4, DIGITAL COMMUNICATION

enter exit page up up down select

The Terminal mode must not be used if the multidrop port is daisy-chained to other instruments.

The mode may be changed using the INTERFACE MENU through the INTERFACE

MODE menu selection. When in Terminal mode, this choice may be made

manually, or through the serial port. The mode may be changed from Command to Terminal through the serial port using the REMOTE command. For information on required communication parameters refer to the REMOTE command in section

4.4.5.2.

4.4 Serial Command Control

When in the Command mode, two command sets are available. These are the 9800 command set and the Bavarian Network command set. The 9800 command set is recommended for general use. The Bavarian Network command set was set to support a specialized network in Bavaria. Additionally, three communication protocols are provided to allow the user to specify the different handshaking based on their requirements.

4.4.1 9800 Command Set Format

All 9800 commands follow the command format as specified in this section. The specific 9800 commands and their functions are described in section 4.4.5.

9800 Command Format: <CCCCCCCCC>,<III>,<D>,<NN>,<PPPPPPPPPPPP><T>

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Where:

<III>

<D>

<NN>

<T>

= command in ASCII, 1 to 9 characters = three-digit instrument ID in ASCII format = single digit data type in ASCII (optional) = number of parameters in ASCII, 1 to 9 (optional) = parameter in ASCII, 1 to 15 characters (optional) = termination <CR> or <LF>

For commands that do not have parameters the format is the subset :

For commands with multiple parameters, the parameters are separated by the comma delimiter and the termination character follows the last parameter:

4.4.1.1 Examples

A 9800 command with no parameters would be the concentration request, DCONC, used here with an instrument I.D. of 001.

DCONC,001<CR>

If no device I.D. is programmed, the I.D. ??? can be used to address any analyzer connected to the RS232 line. An example of this is shown here.

DCONC,???<CR>

Caution

Using this I.D. will result in a response from all analyzers connected to the serial line.

An example of a 9800 command with a parameter would be the trend dump command, DTREND, used here with an instrument I.D. of 134.

DTREND,134,1,1,GASAVG<CR>

4.4.2 Bavarian Network Command Set Format

All Bavarian Network commands follow the command format as specified in this section. The specific Bavarian commands and their function are described in section 4.4.5.1.

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CHAPTER 4, DIGITAL COMMUNICATION

Bavarian Network Command Format: <STX><TEXT><ETX><BCC1><BCC2>

Where:

<STX>

<TEXT>

<ETX>

<BCC1>

<BCC2>

= ASCII Start Of Transmission = 02 hex = ASCII text maximum length of 120 characters = ASCII end of transmission = 03 hex = ASCII representation of block check value MSB = ASCII representation of block check value LSB

The block check algorithm begins with 00 Hex and exclusive-OR each ASCII character from <STX> to <ETX> inclusive. This block check value is then converted to ASCII format and sent after the <ETX> character.

4.4.2.1 Examples

The following is an example of a valid Bavarian data request for an instrument that has an I.D. of 97:

<STX>DA097<EXT>3A

The block check calculation is best shown by the following table:

Character Hex Value Binary Block Check

<STX>

<ETX>

02 0000 0010 0000 0010

44 0100 0100 0100 0110

41 0100 0001 0000 0111

30 0011 0000 0011 0111

39 0011 1001 0000 1110

37 0011 0111 0011 1001

03 0000 0011 0011 1010

The binary value 0011 1010 corresponds to the hex value 3A. This value in ASCII forms the last two characters of the data request message. Please note that the I.D. of 97 is sent as the sequence 097. All I.D. strings must have 3 digits and the user should always pad with ASCII zero characters.

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This is an example of a valid command to put the unit in the manual span mode if the instrument has an I.D. of 843:

<STX>ST843 K<ETX>52

The block check operation is best shown with the following table:

Character Hex Value Binary Block Check

<STX>

S T 8 4 3

02 0000 0010 53 0101 0011 0101 0001 54 0101 0100 0000 0101 38 0011 1000 0011 1101 34 0011 0100 0000 1001 33 0011 0011 0011 1010

20 0010 0000 0001 1010

<ETX>

4B 0100 1011 0101 0001 03 0000 0011 0101 0010

The binary block check value is 0101 0010 which is the hex value 52 as shown at the end of the command string.

4.4.3 Protocol Definition and Selection

There are three protocol selections available for the EC9830 via the INTERFACE

MENU. These are provided so the user may select the appropriate protocol for their

desired application. The first protocol designated original should be used when upgrading software in analyzers that are already in serial networks. The original protocol is provided for back-compatibility as it completely duplicates the protocol already in the field. The second protocol provided is Bavarian. The Bavarian protocol should be used with the Bavarian Network Command Set for any Bavarian network applications. Note specifying the Bavarian protocol still allows the user to access the 9800 command set. The third protocol provided is the enhanced protocol. The enhanced protocol provides a more robust handshaking environment as specified in section 4.4.3.9.

0000 0010

4.4.3.1 Original Protocol

This protocol is provided for back compatibility with pervious versions (before Version 2.05) of 9800B software. There are a number of idiosyncrasies in the original protocol that are preserved to allow existing applications to use upgraded software without modifying their interface.

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CHAPTER 4, DIGITAL COMMUNICATION

4.4.3.2 Command Acknowledgment

 For 9800 style commands that provide a data response, the data response itself

is the acknowledgment.

 For 9800 style commands that do not provide a data response, the

acknowledgment is the returned ASCII string O.K.

 For Bavarian Network commands, no acknowledgment is returned.

4.4.3.3 Negative Command Acknowledgment

 For 9800 commands, if a valid Instrument I.D. is received with an invalid

command string the message INVALID COMMAND is sent.

 For Bavarian Network commands, no negative command acknowledgment is

sent.

4.4.3.4 Original Protocol Idiosyncrasies

 Block check characters are not checked on Bavarian commands.  The <STX> character is ignored.  The <ETX> character is a valid termination for Bavarian commands even in the

absence of a <STX> character.

 The DA command will function without a serial I.D.  The string DA<CR> is a valid command.  The zero padding on the response to the DA command contains six ASCII

zeros instead of the standard ten ASCII zeros.

 The data type must be sent on 9800 style commands but it is not checked

against the actual parameters.

 The number of data parameters must be sent on 9800 style commands but it is

not checked against the actual parameters.

4.4.3.5 Bavarian Protocol

This protocol is intended to correct the idiosyncrasies in the original protocol, as noted in section 4.4.3.1, as they apply to the Bavarian network. This protocol selection strictly applies the Bavarian network protocol to all commands.

4.4.3.6 Command Acknowledgment

 For 9800 style commands that provide a data response, the response itself is

the acknowledgment.

 For 9800 style commands that do not provide a data response, no

acknowledgment is returned.

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 For Bavarian Network commands no acknowledgment is returned.

4.4.3.7 Negative Acknowledgment

For 9800 commands and for Bavarian Network commands, no negative command acknowledgment is sent.

4.4.3.8 Bavarian Protocol Idiosyncrasies

 The string DA<CR> is a valid command.  The DA command will function without an I.D.  The data type must be sent on 9800 style commands but it is not checked

against the actual parameters.

 The number of data parameters must be sent on 9800 style commands but it is

not checked against the actual parameters.

4.4.3.9 Enhanced Protocol

This protocol is provided to allow easier and more robust interfacing between the EC9830 and a computer. Every command with a valid I.D. will respond with either <ACK> or <NAK>. Bavarian commands also respond with either <ACK> or

<NAK>, although this is outside the normal Bavarian Network protocol.

Note

This protocol selection should not be used in Bavarian network applications.

4.4.3.10 Command Acknowledgment

 For all valid 9800 and Bavarian commands, an ASCII <ACK> character is

returned.

 For commands that request data, the data will be sent after the <ACK>

character.

4.4.3.11 Negative Command Acknowledgment

 Any detected error will respond with the ASCII <NAK> character followed by

an error message.

 Due to the constraints of the multidrop environment the unit I.D. must be

received intact for a <NAK> response to be sent.

 An invalid command will cause the response <NAK>UNKNOWN

COMMAND<CR><LF>.

 An invalid command format will cause the response <NAK> BAD COMMAND

FORMAT<CR><LF>.

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 A bad block check on a Bavarian command will cause the response <NAK>BAD

BLOCK CHECK<CR><LF>.

 If a Bavarian command is sent without a set of matching <STX> and <ETX>

characters it will cause the response <NAK>BAD STX ETX PAIR<CR><LF>.

4.4.3.12 Enhanced Protocol Idiosyncrasies

 The string DA<CR> is a valid command.  The DA command will function without an I.D.  The data type must be sent on 9800 style commands but it is not checked

against the actual parameters.

 The number of data parameters must be sent on 9800 style commands, but it is

not checked against the actual parameters.

4.4.4 Establishing Communications

The first step in establishing communications with the EC9830 is to connect a computer or terminal to one of the instrument's RS232 serial ports as specified in section 4.2.1. The default serial configuration for either serial port is 2400,8,N,1 (2400 baud, 8 bits, no parity, and one stop bit). If you need to change the serial configuration from the default, use the INTERFACE MENU.

CHAPTER 4, DIGITAL COMMUNICATION

Once the instrument has been connected, place the instrument in Command mode by entering the INTERFACE MENU via the front panel and selecting COMMAND as the

INTERFACE MODE. Then, using a communication package such as HYPER

TERMINAL establish communications with the instrument.

To test the communication connection type DCOMM,??? and press the Enter key. The complete alphanumeric set recognized by the EC9830 should be displayed on the computer followed by END OF MULTI-DROP PORT TEST

4.4.4.1 Multidrop Communications

The term multidrop is an idiomatic contraction of the term multiple drops. It is a term used to denote a parallel connection of multiple RS232 transceivers. In this scheme, all receivers share the same receive line that comes from a single master. Likewise, these multiple transceivers share the same transmit line which goes back to a single master. This strategy is a method of attaching multiple slave units (instruments) to a single master (computer).

In the multidrop strategy, each unit is given an identification number (I.D.) which is sent with each command from the master. When a unit recognizes its unique

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I.D., it processes the command and responds appropriately. The integrity of this method relies on a strict enforcement of the following rules:

 Each unit in the multidrop must have a unique I.D. that is programmed into

the unit before attaching to the network.

 After a command is sent by the master, the master must then wait for a

response. Only after a reasonable time-out period should the master send another command.

 The multidrop master must include a time-out mechanism in the event that the

I.D. sent with the command is garbled. Clearly a <NAK> on a bad I.D. is not possible for the units in this scheme.

 The master must correlate the unit response with I.D. sent in the command to

know which unit in the multidrop is responding.

 Any command that would cause two units on the multidrop to respond at the

same time must be avoided. If more than one unit attempts to respond on the common transmit line, a data collision will occur destroying both messages.

4.4.4.2 Programming Instrument Identifiers

Note

The Instrument ID, or Main Gas ID, can be set manually in the Instrument Menu or the Interface Menu. Refer to section 2.5.3 for further details. This is this preferred method.

Alternatively, the command PI is the only command used to set the Instrument I.D. for a given analyzer. The instrument can then be used standalone or as one of several multidrop (daisy-chain) analyzers. The format of this command is:

PIXXX YYY<CR>

Where:

XXX is the unit I.D.

YYY is the secondary unit I.D.

 The parameter XXX is the unit I.D. and must be three characters.  Unit I.D.'s such as 1 should be programmed as 001.  For the 9841 the YYY parameter is the second unit I.D. and may be used for

any command query. This is in support of existing Bavarian networks.

 Only one analyzer at a time may be programmed with an I.D. Do not issue

this command with multiple units on a multidrop.

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Specifications and Main Features

Frequently Asked Questions

User Manual