EFLOW EF-Series Instruction Manual

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Flow Computer Division

eFlow EF-Series Flow Computer



Instruction Manual

Form A6103

February 2001

Loose-leaf version: Part Number D301149X012 Bound version: Contact FAS

EF-Series Instruction Manual

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Revision Tracking Sheet

February 2001

This manual may be revised periodically to incorporate new or updated information. The date revision level of each page is indicated at the bottom of the page opposite the page number. A major change in the content of the manual also changes the date of the manual which appears on the front cover. Listed below is the date revision level of each page.

Page Revision

All pages 2/01



Printed in the U.S.A.

While this information is presented in good faith and believed to be accurate, Fisher Controls does not guarantee satisfactory results from reliance upon such information.

performance, merchantability, fitness or any other matter with respect to the products

process in conflict with any patent. Fisher Controls reserves the right, without notice, to alter or improve the designs or specifications of the products described herein.

ii Rev 2/01

Nothing contained herein is to be construed as a warranty or guarantee, express or implied, regarding the

, nor as a recommendation to use any product or

EF-Series Instruction Manual

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Table of Contents

SECTION 1 — GENERAL INFORMATION ............................................................ 1-1

1.1 Manual Overview ........................................................................................................................ 1-1

1.2 Section Contents .......................................................................................................................... 1-2

1.3 Additional Information ................................................................................................................ 1-2

1.4 Product Overview ........................................................................................................................ 1-3

1.5 Installation Requirements ............................................................................................................ 1-7

1.6 Mounting.................................................................................................................................... 1-12

1.7 Power Consumption Calculation ............................................................................................... 1-15

1.8 Startup and Operation ................................................................................................................ 1-20

SECTION 2 — USING THE EF-SERIES UNIT ........................................................ 2-1

2.1 Scope............................................................................................................................................ 2-1

2.2 Section Contents .......................................................................................................................... 2-1

2.3 Product Functions ........................................................................................................................ 2-3

2.4 Product Electronics ...................................................................................................................... 2-8

2.5 Connecting the EF-Series unit to Wiring................................................................................... 2-15

2.6Configuration.............................................................................................................................2-26

2.7Calibration.................................................................................................................................2-27

2.8 Troubleshooting and Repair....................................................................................................... 2-28

2.9 Specifications............................................................................................................................. 2-35

SECTION 3 — COMMUNICATION CARDS ........................................................... 3-1

3.1 Scope............................................................................................................................................ 3-1

3.2 Section Contents .......................................................................................................................... 3-1

3.3 Product Descriptions.................................................................................................................... 3-2

3.4 Initial Installation and Setup........................................................................................................ 3-8

3.5 Connecting Communications Cards to Wiring.......................................................................... 3-10

3.6 Troubleshooting and Repair....................................................................................................... 3-13

3.7 Communication Cards Specifications........................................................................................ 3-15

Rev 2/01 iii

EF-Series Instruction Manual

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Table of Contents (Continued)

SECTION 4 — THE FLOW SENSOR ........................................................................ 4-1

4.1 Scope ............................................................................................................................................4-1

4.2 Description ...................................................................................................................................4-1

4.3 Process Connections..................................................................................................................... 4-2

4.4 Sensor Wiring............................................................................................................................... 4-2

4.5 Configuration ...............................................................................................................................4-3

4.6 Calibration....................................................................................................................................4-4

4.7 Specifications ...............................................................................................................................4-8

GLOSSARY OF TERMS ............................................................................................. G-1

INDEX ..............................................................................................................................I-1

iv Rev 2/01

EF-Series Instruction Manual

SECTION 1 — GENERAL INFORMATION

1.1 MANUAL OVERVIEW

This manual describes the eFlow™ EF-Series Flow Computer, part of the family of flow computers manufactured by Fisher Controls. Included in this manual are the following sections:

♦

Table of Contents Table of Contents

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Section 1 General Information

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Section 2 Using the EF-Series Unit

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Section 3 Communications Cards

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Section 4 Flow Sensor

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Glossary Glossary of Terms

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Index Topical Index

Table of Contents lists each section and information contained in that section of the document.

Section 1, which you are now reading, describes this manual and mentions related manuals. This

section also provides a summary of the EF-Series hardware, installation requirements, mounting the unit, and power requirements.

Section 2 provides information and specifications concerning the use of the EF-Series Flow Computer. Topics covered include the Main Electronics Board, wiring, configuration, and troubleshooting.

Section 3 provides information and specifications for the communications cards.

Section 4 describes the flow sensor included with the unit for sensing static pressure and differential

pressure.

Glossary of Terms defines terms used in this document and related documents.

Topical Index alphabetically lists the items contained in this manual along with their page numbers.

Rev 2/01 1-1

General Information

1.2 SECTION CONTENTS

This section contains the following information:

Information Section Page Number

Manual Overview 1.1 1-1 Additional Information 1.3 1-2 Product Overview 1.4 1-3

Options 1.4.1 1-6

Installation Requirements 1.5 1-7

Environmental Requirements 1.5.1 1-7 Site Requirements 1.5.2 1-8 Compliance with Hazardous Area Standards 1.5.3 1-9 Power Installation Requirements 1.5.4 1-9 Grounding Installation Requirements 1.5.5 1-10 I/O Wiring Requirements 1.5.6 1-11

Mounting 1.6 1-12

Mounting the EF-Series Unit 1.6.1 1-12 Mounting a Radio 1.6.2 1-14 Accessing the Battery Compartment 1.6.3 1-14

Power Consumption Calculation 1.7 1-15

Determining I/O Channel Power Consumption 1.7.1 1-15 Determining Auxiliary Power Consumption 1.7.2 1-16 Totaling Power Requirements 1.7.3 1-16 Solar-Powered Installations 1.7.4 1-17 Batteries 1.7.5 1-19

Startup and Operation 1.8 1-20

Startup 1.8.1 1-20 Operation 1.8.2 1-20

1.3 ADDITIONAL INFORMATION

The following manuals may be used to acquire additional information, not necessarily found in this manual:

! ROCLINK for Windows Configuration Software User Manual – Part Number

D301138X012

! ROCLINK Configuration Software User Manual – Part Number D301101X012 ! ROC/FloBoss Accessories Instruction Manual – Part Number D301061X012

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EF-Series Instruction Manual

1.4 PRODUCT OVERVIEW

The eFlow EF-Series units are 32-bit microprocessor-based Electronic Flow Measurement (EFM) computers that provide functions required for measuring the flow at a single meter run. The EF-Series unit measures differential pressure, static pressure, and temperature; in addition, it provides the functions required for gas orifice metering.

The EF-Series Unit computes gas flow for both volume and energy. The unit provides on-site functionality and supports remote monitoring, measurement, data archival, and communications. The design allows you to configure specific applications including those requiring gas flow calculations, data archival, and remote communications.

The EF-Series Unit provides the following standard components and features:

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Weather-tight enclosure.

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Main Electronics Board.

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Built-in Liquid Crystal Display (LCD) with two-line alphanumeric viewing.

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A 32-bit microprocessor, 512K of flash ROM, and 512K of static memory storage.

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Built-in Sensor for orifice metering.

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Built-in Resistance Temperature Detector (RTD) input.

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Built-in Discrete Output (DO) for sampler or odorizer control.

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Up to 28 amp-hour battery capacity.

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Operator interface (LOI) port.

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Host communications port for optional communications card.

Physically, the unit consists of a printed-circuit Main Electronics Board and a display housed in a compact, weather-tight case. The EF-Series unit is packaged in a NEMA 4 windowed enclosure that can mount on a wall or a pipestand. A cover is provided for the display to protect it from adverse weather conditions. Refer to Figure 1-1.

The steel enclosure protects the electronics from physical damage and harsh environments. The enclosure consists of two pieces: the body and the door. A foam-rubber gasket seals the unit when the hinged door is closed. The hinge, located on the left side, is stainless steel and fastened to the body with machine screws, allowing removal of the door. The door is secured by a lockable hasp. Refer to Figure 1-2 on page 1-13 for dimensional details.

The Main Electronics Board mounts on quick-fastener stand-offs located on top of the swing-out panel. The dimensions of the board are approximately 5 by 7.5 inches. The majority of the components are surface-mounted, with the top side of the board used for components. The Main Electronics Board provides built-in I/O capabilities, an LCD display, and provisions for an optional communications card. For more information on the Main Electronics Board, refer to Section 2.

Rev 2/01 1-3

General Information

Mounting Flange

Display

Cover

Operator Interface

Connector

Sensor

Figure 1-1. eFlow EF-Series Flow Computer

The built-in Liquid Crystal Display (LCD) provides the ability to look at data and configuration parameters while on site without using the local operator interface (LOI) and a PC. The LCD display is factory-mounted directly to the Main Electronics Board and visible through the window on the front panel. Through this display, you can view pre-determined information stored in the unit. Up to 16 items can be defined for display. The display automatically cycles through the configured list of items displaying a new value approximately every three seconds.

A Motorola 32-bit CMOS microprocessor runs at 14.7 MHz and has low-power operating modes, including inactivity and low battery condition. The EF-Series Unit comes standard with 512K of builtin, super capacitor-backed static random access memory (SRAM) for storing data and history. The unit also has 512K of programmable read-only memory (flash ROM) for storing operating system firmware, applications firmware, and configuration parameters.

The built-in inputs and outputs (I/O) on the EF-Series Unit consist of a port for the Sensor, a 4-wire Resistance Temperature Detector (RTD) input interface, and a discrete output (DO). Three diagnostic inputs are dedicated to monitoring battery voltage, charger voltage, and enclosure/battery temperature. Refer to Section 2 for more information.

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The orifice-metering Sensor measures differential pressure and absolute or gauge (static) pressure by converting the applied pressure to electrical signals and making the readings available to the Main Electronics Board. The Sensor housing fastens to a flanged adapter, which in turn mounts with four bolts to the bottom of the enclosure. The Sensor cable plugs directly into the Main Electronics Board. For more information on the Sensor, refer to Section 4.

An RTD temperature probe typically mounts in a thermowell on the metering pipe. RTD wires should be protected either by a metal sheath or conduit connected to a liquid-tight conduit fitting on the bottom of the EF-Series enclosure. The RTD wires connect directly to the four-terminal RTD connector on the Main Electronics Board inside the enclosure.

The built-in discrete output (DO) is capable of directly driving a sampler or odorizer. The DO may be used as a Timed Duration Output (TDO).

The operator interface (LOI) port, located on the bottom left-hand side of the enclosure (refer to Figure 1-1), provides for a direct, local link between the EF-Series Unit and a personal computer through an Operator Interface Cable. With the personal computer running the ROCLINK Configuration Software, you can configure the functionality of the unit and monitor its operation. User-level security can be enabled or disabled for the LOI port.

The host communications port (located at COM1) is available for use with an optional communications card to permit serial communication protocols, as well as dial-up modem communications. User-level security can be enabled or disabled for the host communications port

The I/O parameters, Sensor inputs, flow calculations, power control, and security are configured and accessed using the ROCLINK Configuration Software. Refer to the ROCLINK for Windows User Manual (or the DOS-based ROCLINK user manual) for details concerning software capabilities.

The firmware, contained in flash ROM on the electronics board, determines much of the functionality of the EF-Series Unit, such as:

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Memory logging of 240 alarms and 240 events.

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Archival of data for up to 15 history points for up to 35 days.

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Power cycling control for a radio or cell phone through the EIA-232 communications card.

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Flow calculations (AGA and API standards) for a single meter run.

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Communications support alarm call-in to host.

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User-level security.

Refer to Section 2.3 for more information about the functionality provided by the firmware.

Rev 2/01 1-5

General Information

1.4.1 Options and Accessories

The EF-Series Unit supports the following options and accessories:

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Communications Cards for host communications.

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Bracket for internally-mounted radio.

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Local Operator Interface (LOI) cable.

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Batteries.

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Solar Panels.

A variety of plug-in communication cards are available that allow you to customize the EF-Series Unit installation for most communications requirements. The communication cards provide an interface for the host communications port. These cards permit serial communication protocols, as well as dial-up modem communications. One card of the following types can be accommodated:

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EIA-232 (RS-232) for asynchronous serial communications.

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EIA-485 (RS-485) for asynchronous serial multi-drop communications.

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Dial-up modem for communications over a telephone network.

Stand-offs on the Main Electronics Board allow the communications cards to be added easily. Refer to Section 3 for more information.

A radio with an integral modem can also be mounted inside the enclosure using the optional radio bracket (see Section 1.6). The radio bracket allows a radio up to 2.25 inches high to be mounted securely in the battery compartment inside the enclosure. Power for the radio can be controlled through the EIA-232 communications card. Clearance is provided for the radio antenna cable to exit the bottom of the enclosure.

The local operator interface (LOI) port provides for a direct, local link using an Operator Interface Cable between the EF-Series Unit and a personal computer. With the personal computer running the ROCLINK Configuration Software, you can configure the functionality of the unit and monitor its operation. The Operator Interface Cable is available as an accessory.

The EF-Series Unit enclosure can hold up to four sealed lead-acid batteries. The 12-volt batteries provide approximately 7 amp-hours each, resulting in up to 28 amp-hours of backup capacity. The batteries are mounted behind the electronics swing-out panel and are retained by the panel when it is secured. The batteries are connected to a wiring harness that allows the batteries to be changed without removing power from the unit. Refer to Section 1.7.5 for more information.

A solar panel can be installed to recharge the backup batteries; it connects to the POWER charge inputs on the Main Electronics Board. Circuitry on the Main Electronics Board monitors and regulates the charge based on battery voltage, charging voltage, and temperature. The typical panels used are 12-volt panels with output ratings of 5 or 10 watts. The panels are typically bracket-mounted on a pole or pipe, and the wiring is brought into the bottom of the enclosure through a liquid-tight fitting.

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EF-Series Instruction Manual

1.5 INSTALLATION REQUIREMENTS

This section provides generalized guidelines for successful installation and operation of the EF-Series Unit. Planning helps to ensure a smooth installation. Be sure to consider location, ground conditions, climate, and site accessibility while planning an installation.

The versatility of the EF-Series Unit allows it to be used in many types of installations. For additional information concerning a specific installation, contact your Fisher Representative. For detailed wiring information, refer to Section 2.

The Installation Requirements section includes:

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Environmental Requirements

♦

Site Requirements

♦

Compliance with Hazardous Area Standards

♦

Power Installation Requirements

♦

Grounding Installation Requirements

♦

I/O Wiring Requirements

NOTE

The EF-Series Unit has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy. If not installed and used in accordance with this instruction manual, the EF-Series Unit may cause harmful interference to radio communications. Operation of the equipment in a residential area is likely to cause harmful interference, in which case you will be required to correct the interference at your own expense.

1.5.1 Environmental Requirements

The EF-Series Unit case is classified as a NEMA 4 equivalent enclosure. This provides the level of protection required to keep the units operating under a variety of weather conditions.

The unit is designed to operate over a wide range of temperatures. However, in extreme climates it may be necessary to moderate the temperature in which the unit must operate.

The unit is designed to operate over a -40 to 75° temperature range is -25 to 70° C (-13 to 158° F). When mounting the unit, be aware of external devices that could have an effect on the operating temperature. Operation beyond the recommended temperature range could cause errors and erratic performance. Prolonged operation under extreme conditions could also result in failure of the unit.

Rev 2/01 1-7

C (-40 to 167° F) temperature range. The LCD

General Information

Check the installation for mechanical vibration. The EF-Series Unit should not be exposed to levels of vibration that exceed 2 G for 15 to 150 hertz and 1 G for 150 to 2000 hertz.

1.5.2 Site Requirements

Careful consideration in locating the EF-Series Unit on the site can help prevent future operational problems. The following items should be considered when choosing a location:

♦

Local, state, and federal codes often place restrictions on monitoring locations and dictate site requirements. Examples of these restrictions are fall distance from a meter run, distance from pipe flanges, and hazardous area classifications.

♦

Locate the unit to minimize the length of signal and power wiring.

♦

Orient solar panels to face due South (not magnetic South) in the Northern Hemisphere and due North (not magnetic North) in the Southern Hemisphere. Make sure nothing blocks the sunlight from 9:00 AM to 4:00 PM.

♦

Antennas are equipped for radio communications and must be located with an unobstructed signal path. If possible, locate antennas at the highest point on the site and avoid aiming antennas into storage tanks, buildings, or other tall structures. Allow sufficient overhead clearance to raise the antenna.

♦

To minimize interference with radio communications, locate the unit away from electrical noise sources such as engines, large electric motors, and utility line transformers.

♦

Locate the unit away from heavy traffic areas to reduce the risk of being damaged by vehicles. However, provide adequate vehicle access to aid in monitoring and maintenance.

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EF-Series Instruction Manual

1.5.3 Compliance with Hazardous Area Standards

The EF-Series Unit has hazardous location approval for Class I, Division 2, Groups A to D exposures. The Class, Division, and Group terms are defined as follows:

Class defines the general nature of the hazardous material in the surrounding atmosphere.

Class I is for locations where flammable gases or vapors may be present in the air in quantities sufficient to produce explosive or ignitable mixtures.

Division defines the probability of hazardous material being present in an ignitable

concentration in the surrounding atmosphere. Division 2 locations are presumed to be hazardous only in an abnormal situation.

Group defines the hazardous material in the surrounding atmosphere. Groups A to D are

defined as follows:

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Group A – Atmosphere containing acetylene.

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Group B – Atmosphere containing hydrogen, gases or vapors of equivalent nature.

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Group C – Atmosphere containing ethylene, gases or vapors of equivalent hazards.

♦

Group D – Atmosphere containing propane, gases or vapors of equivalent hazards.

For the EF-Series Unit to be approved for hazardous locations, it must be installed according to the National Electrical Code (NEC) Article 501.

CAUTION

When installing units in a hazardous area, make sure all installation components selected are labeled for use in such areas. Installation and maintenance must be performed only when the area is known to be nonhazardous.

1.5.4 Power Installation Requirements

The typical source of primary power for EF-Series Unit installations is solar power.

Refer to Section 1.7, Power Consumption Calculation, on Page 1-15 concerning solar power, auxiliary device power, and batteries.

Rev 2/01 1-9

General Information

1.5.5 Grounding Installation Requirements

Ground wiring requirements for are governed by the National Electrical Code (NEC).

Proper grounding of the EF-Series Unit helps to reduce the effects of electrical noise on the unit’s operation and protects against lightning. Lightning protection is designed into the unit, especially for the built-in field wiring inputs and outputs. You may want to consider installing a telephone surge protector for the dial-up modem communications card.

All earth grounds must have an earth to ground rod or grid impedance of 25 ohms or less as measured with a ground system tester. The grounding conductor should have a resistance of 1 ohm or less between the EF-Series Unit case ground lug and the earth ground rod or grid.

The grounding installation method for the unit depends on whether the pipeline has cathodic protection. On pipelines with cathodic protection, the EF-Series Unit must be electrically isolated from the pipeline.

Electrical isolation can be accomplished by using insulating flanges upstream and downstream on the meter run. In this case, the EF-Series Unit could be flange mounted or saddle-clamp mounted directly on the meter run and grounded with a ground rod or grid system.

On pipelines without cathodic protection, the pipeline itself may provide an adequate earth ground and the EF-Series Unit could mount directly on the meter run. Test with a ground system tester to make sure the pipeline to earth impedance is less than 25 ohms. If an adequate ground is provided by the pipeline, do not install a separate ground rod or grid system. All grounding should terminate at a single point.

If the pipeline to earth impedance is greater than 25 ohms, the installation should be electrically isolated and a ground rod or grid grounding system installed.

The recommended cable for I/O signal wiring is an insulated, shielded, twisted pair. The twisted pair and the shielding minimize signal errors caused by EMI (electromagnetic interference), RFI (radio frequency interference), and transients. A ground bar is provided for terminating shield wires and other connections that require earth ground. A lug on the outside of the enclosure is provided to ground the enclosure. Note that the ground bar should be directly wired to the ground lug, rather than depending on the enclosure to make the connection between the ground bar and ground lug. Refer to Section 2 for further details.

CAUTION

Do not connect the earth ground to any wiring terminal on the Main Electronics Board.

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EF-Series Instruction Manual

1.5.6 I/O Wiring Requirements

I/O wiring requirements are site and application dependent. Local, state, or NEC requirements determine the I/O wiring installation methods. Direct burial cable, conduit and cable, or overhead cables are options for I/O wiring installations. Section 2 contains detailed information on connecting I/O wiring to the EF-Series Unit.

The Main Electronics Board containing the field wiring terminal connections is accessed by opening the door after removing the lock (if installed) and releasing the hasp on the right-hand side. The input terminal wiring is arranged on the lower edge of the Main Electronics Board. The terminal designations are printed on the circuit board.

Rev 2/01 1-11

General Information

1.6 MOUNTING

When choosing an installation site, be sure to check all clearances. Provide adequate clearance for the enclosure door to be opened for wiring and service. The door is hinged on the left side. The LCD display should be visible and accessible for the on-site operator. When using a solar panel, there should be adequate clearance, and view of the sun should not be obstructed. Allow adequate clearance and an obstructed location for antennas when using radios.

The Sensor is factory-mounted directly to the EF-Series Unit enclosure with four bolts. This mounting uses a special coupler to join the Sensor to the four-bolt mounting pattern on the bottom of the enclosure. See Section 4 for more information.

The Mounting section includes:

♦

Mounting the EF-Series Unit

♦

Mounting a Radio

♦

Accessing the Battery Compartment

1.6.1 Mounting the EF-Series Unit

Mounting of the EF-Series Unit can be accomplished using either of the following methods:

♦

Pipe mounted. The enclosure provides top and bottom mounting flanges with holes for 2-inch pipe clamps (U-bolts and brackets supplied). The 2-inch pipe can be mounted to another pipe with a pipe saddle, or it can be cemented into the ground deep enough to support the weight and conform to local building codes.

♦

Wall or panel mounted. Fasten to the wall or panel using the mounting flanges on the enclosure. Use 5/16-inch bolts through all four holes. Mounting dimensions are given in Figure 1-2.

CAUTION

Do not mount the EF-Series Unit with the Sensor supporting the entire weight of the unit. Due to the weight of the unit with batteries and possibly an internally mounted radio or cell phone, the unit does not meet vibration requirements unless it is installed using its enclosure mounting flanges.

With either mounting method, the pressure inputs must be piped to the process connections on the Sensor. For more information on process connections, refer to Section 4.

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EF-Series Instruction Manual

Notes: All dimensions are in inches.

Figure 1-2. Outline and Mounting Dimensions

The EF-Series Unit must be mounted vertically with the Sensor at its base as shown in Figure 1-2.

Rev 2/01 1-13

CAUTION

General Information

1.6.2 Mounting a Radio

A radio up to 2.25 inches high can be mounted inside the EF-Series Unit enclosure by using the optional radio bracket. This bracket allows most radios to be secured in the compartment. Fasten the

radio to the bracket using one of the predrilled mounting patterns and the four 6-32 × 0.25 pan-head

screws (supplied).

For an MDS radio:

Remove the winged brackets supplied with the radio.

Fasten the radio through the bottom of the radio bracket using the four 6-32 × 0.25 flat-head

screws supplied.

Place the radio and bracket into the enclosure, aligning the assembly over the two studs on the

back panel of the enclosure and the screw next to the swing-out panel.

Slide the bracket to the right to engage the slots, and tighten the screw.

Route the radio antenna either to the right or to the left and then out the bottom of the

enclosure.

1.6.3 Accessing the Battery Compartment

As many as four 7-amp-hour batteries can be mounted inside the EF-Series Unit enclosure. Refer to Section 1.7.5, Batteries, on page 1-19. To access the battery compartment:

Unscrew the two captive screws on the left side of the swing-out mounting panel containing the

main electronics board.

Unplug the printed-circuit cable going to the Sensor by pressing down on the connector tab and

pulling straight out.

Push down on the detent immediately below the Sensor (P/DP) connector and swing the

mounting panel out. You now have full access to the battery compartment.

Refer to Section 2 for information on battery wiring.

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EF-Series Instruction Manual

1.7 POWER CONSUMPTION CALCULATION

System power consumption determines solar panel and battery sizing for solar power. Table 1-1 provides information to assist in determining power requirements. The EF-Series Unit has low power consumption due to a typical duty cycle of 10 to 20% for its microprocessor; the other 80 to 90% of the time the microprocessor is shut off, with external wake-up signals reactivating it.

The Power Consumption Calculation section includes:

♦

Determining I/O Channel Power Consumption

♦

Determining Auxiliary Power Consumption

♦

Totaling Power Requirements

♦

Solar-Powered Installations

♦

Batteries

1.7.1 Determining I/O Channel Power Consumption

In estimating total I/O power requirements, the “duty cycle” of the built-in discrete output (DO) channel must be estimated. For example, if the DO is active for an average of 15 seconds out of every 60 seconds, the duty cycle is:

Duty Cycle = Active time/(Active time + Inactive time) = 15 sec/60 sec = 0.25

Table 1-1. Power Consumption of the EF-Series Unit and Powered Devices

Device Power Consumption

(mW) in 12V System

min

Main Electronics Board; includes base DO power consumption, RTD, and Flow Sensor.

Built-in Discrete Output (load dependent with a maximum of 300 milliamps at 12 volts). See Section

1.7.1.

Serial Communications Card 30 N/A

Dial-up Modem Comm Card 250 N/A

Aux. Devices from Section 1.7.2 N/A N/A N/A

190 400 1 N/A

0 3600 1

max

Quantity Duty Cycle Subtotal

(mW)

Tot al

Rev 2/01 1-15

General Information

1.7.2 Determining Auxiliary Power Consumption

In determining power requirements for auxiliary devices such as a radio or cell phone, the duty cycle for the device must be estimated. The duty cycle is the percentage of time the device is transmitting (TX). For example, if a radio is transmitting 1 second out of every 60 seconds, and for the remaining 59 seconds the radio is drawing receive (RX) power, the duty cycle is:

Duty Cycle = TX time/(TX time + RX time) = 1 sec/60 sec = 0.0167

To calculate the total power consumed by a radio, obtain the power (P) consumption values for transmit and receive from the radio manufacturer’s literature, then use the following equation to calculate the power consumption for a particular duty cycle:

Power = (PTX x Duty Cycle) + [PRX (1 - Duty Cycle)]

Determine the power consumption for all devices that use power from the EF-Series Unit, and enter the total calculated value in Table 1-1.

1.7.3 Totaling Power Requirements

To adequately meet the needs of the EF-Series system, it is important to determine the total power consumption, size of solar panel, and battery backup requirements accordingly. For total EF-Series Unit power consumption, add the device values in Table 1-1. Although Table 1-2 takes into account the power supplied by the EF-Series Unit to its connected devices, be sure to add the power consumption (in mW) of any other devices used with the EF-Series Unit in the same power system, but not accounted for in the table.

Convert the total value (in mW) to Watts by dividing it by 1000.

mW / 1000 = Watts

For selecting an adequate power supply, use a safety factor (SF) of 1.25 to account for losses and other variables not factored into the power consumption calculations. To incorporate the safety factor, multiply the total power consumption (P) by 1.25.

= P x 1.25 = _____ Watts

To convert P

to current consumption in amps (ISF), divide PSF by the system voltage (V) of 12 volts.

= PSF / V = _____ Amps

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EF-Series Instruction Manual

1.7.4 Solar-Powered Installations

Solar power allows installation of the EF-Series Unit in remote locations. The two important elements in a solar installation are solar panels and batteries. Solar panels and batteries must be properly sized for the application and geographic location to ensure continuous, reliable operation.

A 12-volt solar panel can be installed to provide charging power for the backup batteries. The panel can be rated at 5 or 10 watts (to correspond to the CSA rating of the unit) and is sized depending upon the power requirements of the unit. In pipe-mount installations, the solar panel may be mounted to the same 2-inch pipe that supports the EF-Series Unit. The panel wiring is brought into the enclosure through the pre-punched holes in the bottom of the enclosure and is terminated at the charge (CHG) power terminals on the Main Electronics Board.

The panel must face due South (not magnetic South) in the Northern Hemisphere and due North (not magnetic North) in the Southern Hemisphere. The panel must also be tilted at an angle from horizontal dependent on latitude to maximize the energy output. The angles for different latitudes are normally included in the solar panel documentation. At most latitudes, the performance can be improved by less of an angle during the summer and more of an angle during the winter.

Since a site may have additional power requirements for cell phones or radios, repeaters, and other monitoring devices, power supply and converter accessories may be used to minimize the number of separate power sources required for an installation.

Solar arrays are used to generate electrical power for the EF-Series Unit from solar radiation. The size and number of solar panels required for a particular installation depends on several factors, including the power consumption of all devices connected to the solar array and the geographic location of the installation. Refer to the following paragraphs.

To determine solar panel output requirements, first determine the solar insolation for your geographic area. The map in Figure 1-3 shows solar insolation (in hours) for the United States during winter months. Call your local Fisher Representative for a map detailing your specific geographic area.

Insolation (from map) = _____ hours

Next, calculate the amount of current required from the solar array per day using the following equation. ISF is the system current requirement. Refer to Section 1.7.3 on page 1-16.

= [I

array

(amps) × 24 (hrs)]/Insolation (hrs) = _____ amps

Finally, the number of solar panels can be determined using the following equation:

Number of Panels = I

Rev 2/01 1-17

array

amps/(I

amps/panel) = _____ panels

panel

General Information

Figure 1-3. Solar Insolation in Hours for the United States

NOTE

The “I

” value varies depending on the type of solar panel installed. Refer to

panel

the vendor’s specifications for the solar panel being used.

For example, if I

equals 0.54 amps, and I

array

equals 0.29 amps for a 5-watt panel, then the number

panel

of panels required equals 1.86, which would be rounded up to 2 (panels connected in parallel). Alternatively, the next larger solar panel can be used, which in this case would be a 10-watt panel. Table 1-2 gives I

values for solar panels recommended by Fisher Controls.

panel

Table 1-2. Solar Panel Sizing

Panel I

panel

4.5 watt 0.27 amps

5 watt 0.29 amps

10 watt 0.58 amps

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EF-Series Instruction Manual

1.7.5 Batteries

In solar installations, batteries provide power for the EF-Series Unit whenever the solar panels are not generating sufficient output.

The standard battery configurations use a 12-volt, sealed, lead-acid battery (approximately 6.0 x 2.6 x

3.7 inches). These configurations can provide 7, 14, 21, or 28 amp-hour capacities. Recommended 7 amp-hour battery types (up to four batteries) for EF-Series Units are listed below. If other batteries are used, Fisher Controls recommends rechargeable, sealed, gel-cell, lead-acid batteries.

♦

Powersonic PS-1270 7.0 Amp-Hour

♦

Panasonic LCR12V7.2P 7.2 Amp-Hour

♦

Yuasa NP7-12 7.0 Amp-Hour

The batteries are connected in parallel by a supplied wiring harness to achieve the required capacity. The amount of battery capacity required for a particular installation depends upon the power requirements of the equipment and days of reserve (autonomy) desired. Battery requirements are calculated based on power consumption of the EF-Series Unit and all devices that will be powered by the batteries.

Battery reserve is the amount of time that the batteries can provide power without discharging below 20 percent of their total output capacity. For solar-powered units, a minimum reserve of five days is recommended, with ten days of reserve preferred. Add 24 hours of reserve capacity to allow for overnight discharge. Space limitations, cost, and solar panel output are all factors that affect the actual amount of battery capacity available.

To determine the system capacity requirements, multiply the system current load (ISF) on the batteries by the amount of reserve time required. Compute “ISF” as described in Section 1.7.3, Totaling Power Requirements. The equation is as follows:

System Requirement = I

amps × Reserve hrs = _____ amp-hrs

Finally, determine the number of batteries required for the calculated power consumption by rounding up to the nearest multiple of 7 amps: 7, 14, 21, or 28 amp-hour capacity. If more than 28 amp-hours are required, an external battery enclosure with additional batteries may be used.

Rev 2/01 1-19

General Information

1.8 STARTUP AND OPERATION

Before starting the EF-Series Unit, perform the following checks to ensure the unit is properly installed.

♦

Make sure the enclosure has a good earth ground connected to the earth ground bus inside the enclosure.

♦

Check the field wiring for proper installation. Refer to Section 2.

♦

Make sure the input power has the correct polarity.

♦

Make sure the input power is fused at the power source.

CAUTION

It is important to check the input power polarity before turning on the power. Incorrect polarity can damage the EF-Series Unit.

CAUTION

When installing equipment in a hazardous area, ensure that all components are approved for use in such areas. Check the product labels.

1.8.1 Startup

Apply power to the EF-Series Unit by plugging the input power terminal block into the connector labeled POWER located at the bottom left of the Main Electronics Board. After the EF-Series Unit completes start-up diagnostics (RAM and other internal checks), the LCD displays the date and time to indicate that the EF-Series Unit completed a valid reset sequence. If the LCD does not come on, refer to the Troubleshooting and Repair paragraphs in Section 2 for possible causes.

1.8.2 Operation

Once startup is successful, it is necessary to configure the EF-Series Unit (see Section 2.6 for more information) to meet the requirements of the application. The ROCLINK User Manual provides detailed information for using the ROCLINK software to configure the EF-Series Unit and to calibrate its I/O (see Section 2.7 for more information about calibration). Once the EF-Series Unit is configured and calibrated, it can be placed into operation.

CAUTION

Local configuration or monitoring of the EF-Series Unit through its LOI port must be performed only in an area known to be non-hazardous.

During operation, the EF-Series Unit can be monitored (to view or retrieve current and historical data) either locally or remotely. Local monitoring is accomplished either by viewing the LCD panel detailed in Section 2.4.3, or by using ROCLINK on a PC connected through the LOI port (see the ROCLINK User Manual). Remote monitoring is normally performed through the host port of the EF-Series Unit, using the eFlow Internet Measurement Services (IMS).

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EF-Series Instruction Manual

SECTION 2 — USING THE EF-SERIES UNIT

2.1 SCOPE

This section describes the EF-Series flow computer, focusing on how it works and how to connect wiring. Major topics include:

♦

Product Functions

♦

Product Electronics

♦

Connecting the Wiring

♦

Configuration

♦

Calibration

♦

Troubleshooting and Repair

♦

Specifications

2.2 SECTION CONTENTS

This section contains the following information:

Information Section Page Number

Product Functions 2.3 2-3

Flow Measurement 2.3.1 2-3 History Points 2.3.2 2-4 Security 2.3.3 2-6 Power Control 2.3.4 2-6 Report By Exception (RBX) Alarming 2.3.5 2-7

Product Electronics 2.4 2-8

Main Electronics Board Overview 2.4.1 2-8 Microprocessor and Memory 2.4.2 2-8 Liquid Crystal Display 2.4.3 2-10 Communications Ports 2.4.4 2-10 Built-In Discrete Output 2.4.5 2-11 RTD Input 2.4.6 2-12 Real-Time Clock 2.4.7 2-12 Diagnostic Monitoring 2.4.8 2-12 Automatic Self Tests 2.4.9 2-12 Low Power Modes 2.4.10 2-13

Connecting the EF-Series unit to Wiring 2.5 2-15

Making Wiring Connections 2.5.1 2-15 Connecting Ground Wiring 2.5.2 2-16 Connecting Main Power Wiring 2.5.3 2-17 Auxiliary Output Power 2.5.4 2-21

Rev 2/01 2-1

Using the EF-Series Unit

Information Section Page Number

RTD Wiring 2.5.5 2-21 Discrete Output Wiring 2.5.6 2-23 Connecting Communications Wiring 2.5.7 2-24

Sensor Wiring 2.5.8 2-25 Configuration 2.6 2-26 Calibration 2.7 2-27 Troubleshooting and Repair 2.8 2-28

Backup Procedure Before Removing Power 2.8.1 2-28

Resetting the EF-Series Unit 2.8.2 2-29

After Installing Components 2.8.3 2-33

Replacing the Main Electronics Board 2.8.4 2-33

Sensor Replacement 2.8.5 2-35 Specifications 2.9 2-35

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EF-Series Instruction Manual

2.3 PRODUCT FUNCTIONS

This section describes the functions of the eFlow EF-Series flow computer, most of which is determined by firmware. The features provided by the firmware, much of which must be configured by using the ROCLINK configuration software, are:

♦

Flow calculations for an orifice meter.

♦

Archival of data for up to 15 history points.

♦

Memory logging of 240 alarms and 240 events.

♦

Security with local and remote password protection.

♦

Power cycling control for a radio.

♦

Report-by-exception (RBX) capability.

2.3.1 Flow Measurement

The primary function of the EF-Series Unit is to measure the flow of natural gas through an orifice in accordance with the 1992 American Petroleum Institute (API) and American Gas Association (AGA) standards. The flow calculation is in accordance with ANSI/API 2530-92 (AGA Report No. 3 1992), API Chapter 14.2 (AGA Report No. 8 1992 2nd printing 1994), and API Chapter 21.1. The flow calculation may be configured for either Metric or English units.

The primary inputs used for the orifice metering flow measurement function are differential pressure, static pressure, and temperature. The differential and static pressure inputs, which are sampled once per second, come from the Flow Sensor. The temperature input, which is sampled and linearized once per second, comes from an RTD probe.

Flow Time

The differential pressure stored for each second is compared to the configured low flow cutoff. If the differential pressure is less than or equal to the low flow cutoff or the converted static pressure is less than or equal to zero, flow is considered to be zero for that second. Flow time for a recalculation period is defined to be the number of seconds for which the differential pressure exceeded the low flow cutoff.

Input and Extension Calculation

Every second the EF-Series unit stores the measured input for differential pressure, static pressure, and temperature and calculates the flow extension (defined as the square root of the absolute upstream static pressure times the differential pressure).

Flow time averages of the inputs and the flow extension over the configured recalculation period are calculated unless there is no flow for an entire recalculation period. If there is no flow, averages of the inputs are recorded to allow monitoring during no flow periods.

Rev 2/01 2-3

Using the EF-Series Unit

Instantaneous Rate Calculations

The instantaneous value of the flow extension is used with the previous recalculation period’s Integral Multiplier Value (IMV) to compute the instantaneous flow rate. The IMV is defined as the value resulting from the calculation of all other factors of the flow rate equation not included in the Integral Value (IV). The IV is defined as the flow extension. The instantaneous flow rate is used with the volumetric heating value to compute the instantaneous energy rate.

Flow and Energy Accumulation

The averages of the differential and static pressure, temperature, and flow extension are used with the flow time to compute the flow and energy over the recalculation period. The flow and energy are then accumulated and stored at the top of every hour. At the configured contract hour, the flow and energy are then stored to the Daily Historical Log and zeroed for the start of a new day.

2.3.2 History Points

A total of fifteen history points may be logged and accessed in the EF-Series unit. The first eight are pre-configured for flow metering history and cannot be changed. They are as follows:

♦

Flowing Minutes Today (Accumulate archive type)

♦

Differential Pressure (Average)

♦

Static or Line Pressure (Average)

♦

Temperature (Average)

♦

IMV, Integral Multiplier Value, or C Prime (Average)

♦

Pressure Extension or IV, Integral Value (Average)

♦

Instantaneous Flow (Accumulate)

♦

Instantaneous Energy (Accumulate)

History Point 2, History Point 3, History Point 4, and History Point 6 are all set up as an Average Archive Type that employs one of the following techniques:

♦

Flow dependent time-weighted linear averaging (default selection)

♦

Flow dependent time-weighted formulaic averaging.

♦

Flow-weighted linear averaging.

♦

Flow-weighted formulaic averaging.

For the history points above, the averaging technique is selected by using ROCLINK. In the Meter menu, select Setup, then select Inputs. In the Inputs screen, select the desired Averaging Technique. The selected technique will then be applied to the meter inputs.

The seven user-configurable history points may be configured as described in the ROCLINK User Manual (see Configure - History).

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EF-Series Instruction Manual

2.3.2.1 Minute Historical Log

The EF-Series unit has a 60-minute historical log for every history point. The Minute Historical Log stores the last 60 minutes of data from the current minute. Each history point has Minute Historical Log entries associated with it.

2.3.2.2 Hourly Historical Log

The EF-Series unit has a total of 840 hourly historical logs available for every history point. The Hourly Historical Log is also called the Periodic Log. The Hourly Log is recorded every hour at the top of the hour. The time stamp for periodic logging consists of the month, day, hour, and minute.

2.3.2.3 Daily Historical Log

The EF-Series unit has a total of 35 daily historical logs for every history point. The Daily Log is recorded at the configured contract hour every day with a time stamp that is the same as the Hourly Log. Each history point has daily historical log entries.

2.3.2.4 Alarm Log

The Alarm Log contains the change in the state of any signal that has been enabled for alarms. The system Alarm Log has the capacity to maintain and store up to 240 alarms in a “circular” log (where the oldest log is in effect overwritten by the newest). The alarm log has information fields which include time and date stamp, alarm clear or set indicator, and either the tag of the point which was alarmed along with its current value or a 14 ASCII character description.

In addition to providing functionality for appending new alarms to the log, it allows host packages to request the index of the most recently logged alarm entry. Alarm logging is available internally to the system and to external host packages. Alarm Logs are not stored to the flash ROM during the ROCLINK Save Configuration function.

The Alarm Log operates in a circular fashion with new entries overwriting the oldest entry when the buffer is full. The alarm log provides an audit history trail of past operation and changes. The Alarm Log is stored separately to prevent recurring alarms from overwriting configuration audit data.

2.3.2.5 Event Log

The event log contains changes to any parameter within the EF-Series unit made through the native protocol. This event log also contains other EF-Series unit events such as power cycles, cold starts, and disk configuration downloads.

The system event log has the capacity to maintain and store up to 240 events in a circular log. The event log has information fields which include point type, parameter number, time and date stamp, point number if applicable, the operator identification, and either the previous and current parameter values or a 14-byte detail string in ASCII format.

Rev 2/01 2-5

Using the EF-Series Unit

In addition to providing functionality for appending new events to the log, it allows host packages to request the index of the most recently logged event entry. Event logging is available internally to the system and to external host packages.

Event logs are not stored to flash ROM when the Save Configuration function is issued in the ROCLINK Configuration Software. The event log operates in a circular fashion with new entries overwriting the oldest entry when the buffer is full. The event log provides an audit trail history of past operation and changes. The event log is stored separately to prevent recurring alarms from overwriting configuration audit data.

2.3.3 Security

The EF-Series unit provides for security within the unit. A maximum of 16 log-on identifiers (IDs) may be stored. In order for the unit to communicate, the log-on ID supplied to the ROCLINK Configuration Software must match one of the IDs stored in the EF-Series unit. The Operator Interface port (Security on LOI) has security Enabled by default. The host port Comm1 can likewise be configured to have security protection, but is disabled by default. Refer to the ROCLINK software user manual concerning the device security in the ROC menu.

2.3.4 Power Control

The Power Control function (called Radio Power Control in the ROCLINK software) is used with the RS-232 communications card to provide power savings when using a radio or cell phone for communications. Two modes of Power Control are possible: Second and Minute. In Second mode, the time base for the timers is in 100 millisecond increments and is primarily used with radios. In Minute mode, the time base for the timers is in 1 minute increments and is primarily used with cell phones. Three cycling zones are provided (see Table 2-1 below for eFlow defaults), but zones can be disabled as desired. The RS-232 card provides the switching mechanism by means of contacts (see Section 3.5.1) or the DTR signal.

The Power Control function calculates which zone should be currently active. In Second mode, the Power Control begins in the ON state and continues with a full On Time and then goes to the OFF state for the full Off Time. In Minute mode, the Power Control determines if it should be ON or OFF and how much time it needs until it switches.

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EF-Series Instruction Manual

Table 2-1. Power Control Defaults

Zone Parameters Default Value

Zone 1, Start Time 400 Zone 1, On 60 Min Zone 1, Off 0 Min Zone 2, Start Time 700 Zone 2, On 20 Min Zone 2, Off 10 Min Zone 3, Start Time 1700 Zone 3, On 5 Min Zone 3, Off 15 Min Hold Time 1 Min

2.3.5 Report By Exception (RBX) Alarming

The RBX functionality, also called Alarm Call-in, allows a communications port to be set up to enable the EF-Series unit to spontaneously contact the host computer (in a non-polled mode) when specified alarm conditions exist. To configure RBX, use ROCLINK to set up the desired alarms on individual points (such as an Analog Input) for RBX; in addition, enable the RBX Mode for the flow computer’s Comm1 port and configure the RBX Features.

Rev 2/01 2-7

Using the EF-Series Unit

2.4 PRODUCT ELECTRONICS

This section describes the EF-Series Main Electronics Board. For Communications Cards, see Section

3. For the Flow Sensor, see Section 4.

2.4.1 Main Electronics Board Overview

The Main Electronics Board components support the functionality of the EF-Series unit. Refer to Figure 2-1. The board provides:

♦

32-bit microprocessor

♦

Built-in static RAM

♦

Flash ROM

♦

Liquid Crystal Display (LCD) display

♦

Communications card host port

♦

Operator interface port

♦

Built-in Discrete Output (DO)

♦

RTD input

♦

Diagnostic monitoring

♦

Real-time clock and backup power

♦

Automatic self tests

♦

Power regulation modes

2.4.2 Microprocessor and Memory

The EF-Series unit derives processing power from a 32-bit microprocessor. The 32-bit CMOS microprocessor features dual 32-bit internal data buses and a single 8-bit external data bus. The unit can address up to four megabytes of memory including high-speed direct memory access.

The Main Electronics Board has 512 Kbytes of static random access memory (SRAM) for storing interrupt vectors, alarms, events, and history data.

The Main Electronics Board also has a 512 Kbyte flash memory chip for storing the operating system factory code and configuration parameters. Two of the 64 Kbyte blocks are reserved for internal usage.

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EF-Series Instruction Manual

LCD

Super

Capacitor

"Battery"

Reset Jumper (P1)

Comm Card Connector

Power Wiring

Terminal Block

Sensor Connector

Rev 2/01 2-9

Built-in I/O Terminal Blocks

Figure 2-1. Main Electronics Board

Using the EF-Series Unit

2.4.3 Liquid Crystal Display

A two-line Liquid Crystal Display (LCD) panel is mounted on the Main Electronics Board. The panel has automatic contrast adjustment due to temperature sensing and bias adjustment circuitry on the Main Electronics Board.

The LCD panel remains on at all times when the power applied is in the valid operating range. The panel cycles its display through a configured list of up to 16 parameter values. The first two displays, which cannot be configured by the user, show values for time and date, operating voltages, and battery condition. The next five displays are configured by the factory to show certain flow parameters, but you may change their configuration. Refer to the ROCLINK User Manual for details on how to configure the list of values for the LCD panel.

2.4.4 Communications Ports

The EF-Series unit provides two communication ports:

♦

Local Operator Interface port – LOI.

♦

Host port for communication to eFlow host – COM1.

2.4.4.1 Operator Interface Port – LOI

The Operator Interface port, also called the Local Operator Interface (LOI) port, provides direct communications between the EF-Series unit and the serial port of an operator interface device (normally an IBM-compatible PC). The interface allows you to access the EF-Series unit (using the ROCLINK Configuration Software) for configuration and transfer of stored data. The LOI terminal plus the RTS terminal on the Main Electronics Board provide wiring access to a built-in EIA-232 serial interface, which is capable of 19.2k baud operation. The operator interface port supports only ROC protocol communications. The LOI also supports the log-on security feature of the EF-Series unit if the Security on LOI is Enabled in ROCLINK.

A cannon-type waterproof connector on the bottom of the enclosure provides connection through a prefabricated cable (available from Fisher) for an operator interface device, typically an IBMcompatible personal computer (PC) running the ROCLINK Configuration Software. Inside the EFSeries unit enclosure, the cannon-type connector is wired to three terminals (LOI) on the Main Electronics Board.

2.4.4.2 Host Port – COM1

The host port (also called the COM1 port) is activated by the installation of a communications card, normally an RS-232 serial card. The host port is used to monitor or alter the EF-Series unit from a remote site using a host or the ROCLINK Configuration Software. The host port automatically configures itself based upon the specific communications card installed. The host port supports baud rates up to 19.2K. The COM1 also supports the log-on security feature of the EF-Series unit if the Security on COM1 is Enabled in ROCLINK.

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EF-Series Instruction Manual

The host port can receive messages in ROC protocol and will respond in kind. The host port is capable of initiating a message in support of Report by Exception (RBX) and Store and Forward when using ROC protocol. Refer to the ROCLINK Configuration Software User Manual.

For installations using radio communications, battery power can be conserved by cycling power to the radio or cellular telephone. The power cycling control is achieved through the EIA-232 communications card. The radio or cell phone is connected to terminals located on the EIA-232 communications card, as described in Section 3. For configuration, refer to the Radio Power Control function in the ROCLINK Software User Manual.

The communications connectors on the Main Electronics Board provide the EF-Series unit with electrical access and mounting provisions for the optional communications cards. The communications card mounts directly on the connectors at P3 on the Main Electronics Board and is held in place with three compression stand-offs. The stand-offs on the Main Electronics Board pass through the communications card. The communications cards available for the EF-Series unit allow the options of serial data communication and modem communications. Refer to Section 3.

2.4.5 Built-In Discrete Output

The EF-Series unit provides a discrete output (DO) to provide control capabilities for a sampler or odorizer. The discrete output is capable of switching up to 0.3 amp of current. Refer to Table 2-2.

Table 2-2. Discrete Output

Output voltage during ON state Battery voltage - 0.7 volts Output voltage during OFF state 0 volts Output Current 0.3 amp maximum Maximum voltage 22 volts maximum - clamping occurs

The built-in discrete output on the EF-Series unit is intended to perform sampler functions, but may be used as a standard DO. This includes toggle mode, latched mode, and timed DO mode. The discrete output is accessed by the configuration software as DO Point A4.

When the Sampler function is enabled, the EF-Series unit provides a time duration output (TDO) based on the volume. A control volume and a pulse duration must be specified with the Sampler function. After each flow calculation, an internal volume accumulator is compared to the control volume. If the accumulator exceeds the control volume, a pulse is output and the accumulator is reduced by the control volume. This output may be used to drive an external totalizer, odorizer, gas sampler, or similar device.

Rev 2/01 2-11

Using the EF-Series Unit

2.4.6 RTD Input

The EF-Series unit supports a direct input from a Resistance Temperature Detector (RTD) sensor. The terminals for the RTD wires are located at the bottom right of the Main Electronics Board and labeled “RTD.” Refer to Figure 2-1. The RTD input is converted through a 16-bit RTD converter chip.

During operation, the RTD is read once per second. The value from the RTD is linearized, and then it is sent to processing as Analog Input (AI) Point Number A3. The AI routine converts this value to engineering units, performs calibration corrections, and checks alarming. The board temperature is monitored by the RTD routine; if the temperature has changed by roughly 5° C or 9° F, the RTD circuitry is sent a command to recalibrate its reference.

2.4.7 Real-Time Clock

The real-time clock provides the EF-Series unit with the time of day, month, year, and day of the week. The time chip automatically switches to backup power when the Main Electronics board loses primary input power. Backup power for the real-time clock comes from a supercapacitor (which also backs up the non-volatile RAM), and is adequate for at least three weeks with no power applied to the EF-Series unit.

2.4.8 Diagnostic Monitoring

The electronics board has three diagnostic inputs incorporated into the circuitry for monitoring battery voltage, charging voltage, and board temperature. These inputs can be accessed by using the I/O function of the ROCLINK Configuration Software. The three values are available as the following Analog Input (AI) points:

♦

E1– battery voltage

♦

E2 – input/charging voltage

♦

E5 – board temperature

2.4.9 Automatic Self Tests

The EF-Series unit performs the following self tests on a periodic basis:

♦

Battery low and battery high.

♦

Software and hardware watchdog.

♦

RTD automatic temperature compensation.

♦

Sensor operation.

♦

Charging voltage for the supercapacitor.

♦

Memory validity.

The EF-Series unit operates with 6 to 15 volts of dc power. The LCD becomes active when input power with the proper polarity and startup voltage (typically set at 10.6 volts or greater) is applied to the POWER terminal block (provided the power input fusing/protection is operational). The battery voltage tests ensure that the unit is operating in the optimum mode.

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EF-Series Instruction Manual

The software watchdog is controlled by the Main Electronics Board. This watchdog checks the software for validity every 1.2 seconds. If necessary, the software is automatically reset. The hardware watchdog is controlled by the Main Electronics Board and monitors the power to the hardware. If this voltage drops below 4.75 volts, the unit is automatically shut down.

RTD automatic temperature compensation is tested at approximately every 5 degrees Celsius temperature change of the board temperature.

The EF-Series unit monitors its orifice-metering Sensor for accurate and continuous operation.

Voltage for charging the supercapacitor is checked to ensure that it is continuously applied when the EF-Series unit is powered.

A memory validity self-test is performed to ensure the integrity of memory.

2.4.10 Low Power Modes

The processor used in the EF-Series unit is capable of low power operation under predetermined conditions. These features are available because of the Phase Lock Loop (PLL) used to control the speed of the system clock. The base crystal frequency is 3.6863 MHz and is raised by the PLL to 14.7 MHz for normal system operation. During the low power modes, the PLL and oscillator are in various states of shutdown. Two low power modes are supported: Standby and Sleep (also called Doze).

♦

Standby — This mode is used during periods of inactivity. When the operating system cannot find a task to run, the EF-Series unit enters Standby mode. Processor loading is calculated by using the amount of time spent in Standby mode. This mode keeps the clocks running and communications active with baud clocks running. A Periodic Interrupt Timer (PITR) wakes up the EF-Series unit and starts the normal operating mode.

Wake-up from Standby occurs when the EF-Series unit receives a:

♦

Timed / Alarmed interrupt from the Real-Time Clock.

♦

Signal from the Operator Interface port – LOI.

♦

Signal from Connector P10 (built-in I/O) or I/O card

♦

Signal Carrier Detect (CD) from a communications board – COM1.

♦

Signal Ring Indicator (RI) from a communications board – COM1.

♦

Sleep — This mode is used if a low battery voltage is detected. The battery voltage measured by diagnostic input point E1 is compared to the low-low alarm limit associated with this point. This limit value defaults to 10.6 volts.

Wake-up from Sleep occurs when the EF-Series unit receives a:

♦

Timed / Alarmed interrupt from the Real-Time Clock.

♦

Signal from the Operator Interface port – LOI.

Rev 2/01 2-13

Using the EF-Series Unit

If the battery voltage is less than the low-low alarm limit configured for point E1, the unit:

Sets the Real-Time Clock (RTC) alarm for 15 minutes from the present time if a charge voltage (point E2) is greater than the battery voltage (point E1), or for 55 minutes if the charge voltage is less than the battery voltage.

Writes the message “Low Battery, Sleep Mode” to the LCD.

Enters the Sleep mode.

Shuts down communications.

The unit wakes up from Sleep mode by the Real-Time Clock alarm (set in Step 1) and rechecks the voltage to see if operation is possible. If the voltage is greater than the low-low alarm limit for point E1, a normal restart sequence initiates.

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EF-Series Instruction Manual

2.5 CONNECTING THE EF-SERIES UNIT TO WIRING

The following paragraphs describe how to connect the EF-Series unit to power, ground, I/O devices, and communications devices. Use the recommendations and procedures described in the following paragraphs to avoid damage to equipment.

The field wiring terminations are accessed by opening the front door. The wiring terminals are arranged on the lower edge of the Main Electronics Board. The terminal designations are printed on the circuit board (see Figure 2-1 on page 2-9).

This section includes:

♦

Making Wiring Connections

♦

Connecting Ground Wiring

♦

Connecting Main Power Wiring

♦

RTD Wiring

♦

Discrete Output Wiring

♦

Connecting Communications Wiring

♦

Sensor Wiring

CAUTION

Always turn the power to the EF-Series unit off before you attempt any type of wiring.

CAUTION

To avoid circuit damage when working with the unit, use appropriate electrostatic discharge precautions, such as wearing a grounded wrist strap.

2.5.1 Making Wiring Connections

The Main Electronics Board connectors use compression terminals that accommodate wiring up to #16 AWG in size. The input power terminations use a removable connector and accommodate wiring up to #14 AWG in size. In all cases, connections are made by baring the end (¼ inch maximum) of the wire, inserting the bared end into the clamp beneath the termination screw, and then tightening the screw.

The inserted wires should have a minimum of bare wire exposed to prevent short circuits. Allow some slack when making connections to prevent strain on the circuit board and to provide enough clearance to allow the Main Electronics Board to swing out. This allows access to the batteries without removal of the field wiring.

Rev 2/01 2-15

Using the EF-Series Unit

The following connectors are provided on the Main Electronics Board:

♦

Battery Input – POWER, BAT

♦

Charge Input – POWER, CHG

♦

Auxiliary Radio Power – RADIO

♦

Flow Sensor – P/DP

♦

Discrete Output – DO

♦

Resistance Temperature Detector – RTD

♦

Operator Interface port – LOI

♦

Communications card connector – P3

The input terminal wiring is arranged on the lower edge of the Main Electronics Board. The terminal designations are printed along the bottom of the circuit board as shown in Figure 2-1 on Page 2-9.

2.5.2 Connecting Ground Wiring

The EF-Series flow computer and related components must be connected to an earth ground. The National Electrical Code (NEC) governs the ground wiring requirements for all line-powered devices. Refer to Section 1 for further details.

There is a ground bar located inside the enclosure at the top right-hand side. This ground bus bar is electrically bonded to the enclosure and provides screw compression terminals to connect shields from I/O wiring, line-power earth ground, and other device earth grounds as needed.

An external lug on the bottom outside of the enclosure (refer to Figure 2-2) provides a place to connect an earth ground to the enclosure. Although this ground lug is electrically connected to the ground bar through the enclosure, it is recommended that a ground wire also be connected between the ground lug and the ground bar.

It is recommended that 14 AWG wire be used for the ground wiring. Make sure the installation has only one ground point to prevent creation of a ground loop circuit. A ground loop circuit could cause erratic operation of the system.

The Main Electronics Board is electrically isolated from the enclosure; no earth ground connections to the board should be made. However, the drain shields of I/O signal wiring (such as the RTD cable) should be connected to earth ground at one end to minimize signal errors caused by EMI (electromagnetic interference), RFI (radio frequency interference), and transients.

CAUTION

Do not connect the earth ground to any terminal on the Main Electronics Board.

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ground

Figure 2-2. Earth Ground Connection

Earth Ground

2.5.3 Connecting Main Power Wiring

It is important that good wiring practice be used when sizing, routing, and connecting power wiring. All wiring must conform to state, local, and NEC codes. The POWER terminal block can accommodate up to 14 AWG wire. Refer to Figure 2-3.

Up to 15 volts

To make power connections:

Unplug the left-hand connector from its socket located at P8 on the Main Electronic Board.

Insert each bared wire end into the clamp beneath its termination screw.

Figure 2-3. Power Input Terminal Connector

Up to 22 volts

Secure the screw.

Plug the connector back into the socket at P8.

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As described in sections 2.5.3.1 and 2.5.3.2, connect the batteries (if used) to the “+BAT” and “BAT-” terminals. Connect the charging source (normally a solar panel) to the “+CHG” and “CHG-” terminals. Make sure the hook-up polarity is correct.

NOTE

If you are connecting a solar panel that has its own regulator, connect the panel instead to the +BAT and BAT- terminals.

2.5.3.1 Battery Connections

The battery connections are on the removable terminal block labeled POWER. Refer to Figure 2-4. These connections provide the input power for the electronics and are also the output of the charge regulation circuitry. A single 12-volt, sealed, lead-acid battery or multiple batteries wired in parallel are connected to these terminals, which are labeled “+BAT” for battery positive and “BAT-” for battery negative.

CAUTION

The maximum voltage that can be applied to the “BAT” terminals without damage to the electronics is 15 volts dc.

The EF-Series unit enclosure can hold up to four sealed lead-acid batteries; see Section 1.7.5 for recommended battery types. The 12-volt batteries can be installed to give 7, 14, 21, or 28 amp-hours of backup capacity.

The batteries are mounted under the electronics swing-out mounting panel and are retained by the panel when it is secured. The batteries are connected to a harness that allows the batteries to be changed without removing power from the unit. Make sure that the black wires of the harness are connected to the negative terminals of the batteries and that the red wires are connected to the positive terminals. Input wiring is connected at the POWER wiring terminal connector.

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Swing-out Panel

Figure 2-4. Battery and Solar Panel Connections

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2.5.3.2 Solar Panel Charge Connections

The EF-Series unit contains an internal battery charger circuit for charge control of the 12-volt batteries. The charger monitors the battery voltage, charge voltage, and the battery temperature, which is actually the board enclosure temperature. Based on these three conditions, a charge rate is determined and applied to the battery. Refer to Figure 2-4 for the proper wiring connections.

NOTE

The internal battery charger limits the current input to 1 amp, which is less than the output of a typical 22-watt solar panel. To use a solar panel with an output exceeding 1 amp, ensure that the panel has its own regulator and is connected to the +BAT and BAT- terminals.

NOTE

Keep in mind that a solar panel bigger than 11 watts may violate certain CSA Class I, Division 2 ratings. Be sure to use approved connectors on the bottom of the EF-Series enclosure for routing the power wiring.

NOTE

If the solar panel contains its own regulator, connect it instead to the +BAT and BAT- terminals.

The charging source (solar panel) provides power for the charging of the backup batteries. Overcharging is prevented by comparing the battery cell voltage to a maximum limit. If this limit is exceeded, the battery charge cycle is immediately terminated and cannot be re-initiated until the cell voltage has dropped below the maximum limit.

The charge connections (+CHG and CHG-) are on the removable connector labeled POWER. These connections provide the input voltage and power for the battery charging circuitry. The charger circuitry provides reverse polarity protection and reverse discharge protection, so no external circuitry is required. The maximum voltage that can be applied to the terminals is 22 volts dc. The terminals are labeled CHG+ for charge input positive and CHG- for charge input negative.

A 12-volt solar panel with an output regulated to no more than 15 volts can be directly connected to the +BAT and BAT- terminals.

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2.5.4 Auxiliary Output Power

The auxiliary output power connections are on a fixed terminal block connector labeled RADIO. Refer to Figure 2-5. These terminals can supply power (pass-through) to external devices such as a radio. The power for this connector originates at the battery connection terminal and is not fused or controlled on the Main Electronics Board. Fusing should be installed in the auxiliary output wiring and should not exceed the size of the fuse in the battery harness wiring. The terminals are labeled “+” for positive voltage and “-” for common.

Radio or other constantpowered device

Figure 2-5. Auxiliary Power Terminals

If power to the radio or other device needs to be cycled to conserve power (recommended when batteries are used), use an EIA-232 communications card and connect wiring for switched radio power as described in Section 3. Configure Radio Power Control as detailed in the ROCLINK Configuration Software User Manual.

2.5.5 RTD Wiring

The temperature is input through the Resistance Temperature Detector (RTD) probe and circuitry. An RTD temperature probe mounts directly to the piping using a thermowell, outside the EF-Series enclosure. RTD wires should be protected either by a metal sheath or conduit connected to a liquidtight conduit fitting on the bottom of the enclosure. The RTD wires connect to the four screw terminals designated “RTD” on the Main Electronics Board. Refer to Figure 2-6.

The EF-Series unit provides terminations for a four-wire 100-ohm platinum RTD with a DIN 43760 curve. The RTD has an alpha equal to 0.00385. A three-wire or two-wire RTD probe can be used instead of a four-wire probe; however, they may produce measurement errors due to signal loss on the wiring.

Wiring between the RTD probe and the EF-Series unit must be shielded wire, with the shield grounded only at one end to prevent ground loops. Ground loops cause RTD input signal errors.

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4-Wire RTD

3-Wire RTD

2-Wire RTD

The RTD terminals on the Main Electronics Board are designated and defined as follows:

♦ “REF” current source reference ♦ “+” signal positive input ♦ “-” signal negative input ♦ “RET” return (common) reference

Red

RedRed

Figure 2-6. RTD Wiring Terminal Connections

Jumper

Red

RTD Sensor

As shown in Figure 2-6, the connections at the RTD terminals for the various RTD probes are as follows:

Terminal 4-Wire RTD 3-Wire RTD 2-Wire RTD

REF Red Jumper to + Jumper to + + Red Red, Jumper to REF Red, Jumper to REF – White White White, Jumper to RET RET White White Jumper to –

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2.5.6 Discrete Output Wiring

A discrete output is provided on the Main Electronics Board in the P10 terminal block. Refer to Figure 2-7. The typical application for this output is a sampler or odorizer control, although it may be used for other purposes.

The DO uses a P-channel MOSFET to switch current-limited (300 mA) battery power to the positive terminal. The negative terminal is internally connected to battery negative. A blocking diode, a 22volt transorb, and a back-EMF diode are included to protect the flow computer electronics.

Because the output is not isolated, care must be used to ensure that the operation of the load does not affect the operation of the EF-Series unit. This may include installation of back-EMF diodes and MOVs on the load. The load should be connected as follows:

♦

DO + Positive load

♦

DO - Negative load

Figure 2-7. Discrete Output Terminal Wiring

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2.5.7 Connecting Communications Wiring

The EF-Series unit communicates to external devices through its communication ports. Communications take place either through the operator interface port (LOI) or the host port (COM1). A special 3-pin connector provides a port for an operator interface device. Wiring connections for the host port are made using screw terminals on the installed communications card.

2.5.7.1 Operator Interface Port Wiring

Figure 2-8 displays the operator interface (LOI) port located at P10 on the Main Electronics Board. The LOI port provides connections for a built-in EIA-232 communications interface to a configuration and monitoring device. The configuration and monitoring device typically is an IBM-compatible personal computer. A prefabricated operator interface cable is available as an accessory from Fisher.

The LOI port is intended for use with the ROCLINK Configuration Software. This LOI port is compatible with RS-232 levels. The port signals originate on the Main Electronics Board terminations and are wired to the three-terminal, cannon-style LOI connector located on the bottom of the enclosure. An RTS terminal is provided on the Main Electronics Board (not routed to the cannon connector) and is intended for future applications, such as using the LOI port as a second host port. The following table shows the signal routing of the Main Electronics Board terminations and the cannon-style connector:

Main Board Cannon Connector Signal

BLK 1 Common WHT 2 RXD RED 3 TXD

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EF-Series Instruction Manual

Red (TX)

White (RX)

Black (Common)

Common

Connection at PC Serial Port

Figure 2-8. Operator Interface Wiring

2.5.7.2 Host Port Wiring

The host port provides communications access to the EF-Series unit through a communications card at COM1. Section 3 details the types of communications cards available for the EF-Series unit and how to make wiring connections to each one.

2.5.8 Sensor Wiring

For information on Flow Sensor wiring, refer to Section 4 of this manual.

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2.6 CONFIGURATION

IMPORTANT NOTE: For configuration purposes, the eFlow EF-Series flow computer is equivalent to the FloBoss 503 Flow Manager. References in the ROCLINK software or ROCLINK manual to the FloBoss 500-Series or FB503 generally apply to the EFSeries unit, with the exclusion of I/O Card points, PID Control, and FSTs.

The EF-Series Flow Computer has a number of software settings, called parameters, that must be configured before it is calibrated and placed into operation. Configuration must be performed using the ROCLINK configuration software, which runs on an IBM-compatible personal computer. The personal computer is normally connected to the LOI port of the flow computer to transfer configuration data into the EF-Series unit, although much of the configuration can be done off-line and later loaded into the unit.

The configuration data can be loaded into the flow computer while it is either in the office or in the field. Although configuration changes can be made remotely via the host port, it is not recommended except for minor changes, due to the possibility of data being corrupted during transmission.

Default values for all parameters exist in the firmware of the flow computer. If the default is acceptable for your application, it can be left as it is. At a minimum, the following items should be checked and configured as needed:

♦

Meter Setup and Gas Quality – use Quick Setup in the ROCLINK File menu

♦

Clock – can use Quick Setup

♦

History points (check Averaging Technique on History Points 2, 3, 4, and 6; see Section 2.3.2)

♦

AI points 1 to 3 for Sensor and RTD (High/Low Reading EU, scanning enabled, alarm setup, and such.)

♦

Comm Ports (especially Comm1 – use Comm Ports item in ROC menu)

♦

Power Control (see Section 2.3.4 for defaults, etc.)

♦

Security (see Section 2.3.3)

♦

RBX (if alarm call-in is needed; see Section 2.3.5)

♦

LCD User List (for local display of additional values)

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2.7 CALIBRATION

The calibration routines (performed by the configuration software) support 5-point calibration, with two end points and three mid-points. The low-end or zero reading is calibrated first, followed by the high-end or full-scale reading. The three mid-points, if desired, can be calibrated next. The diagnostic analog inputs—battery voltage (E1), charge voltage (E2), and board/battery temperature (E5)—are not designed to be calibrated.

The built-in inputs that are supported for 5-point calibration are the first three Analog Input points:

♦

Differential pressure located at AI Point A1

♦

Static pressure located at AI Point A2

♦

RTD temperature located at AI Point A3

Since two of the three points are obtained from the Flow Sensor, the calibration procedure for these inputs is described in Section 4.

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2.8 TROUBLESHOOTING AND REPAIR

Troubleshooting and repair procedures are designed to help you identify and fix problems with the Main Electronics Board and communications cards. Contact your Fisher Representative before you attempt to remove a suspected faulty board or card for repair or replacement. To troubleshoot communications cards, refer to Section 3.

The following items may be needed for troubleshooting:

♦

IBM-compatible personal computer.

♦

ROCLINK Configuration Software.

The ROCLINK Configuration Software runs on the personal computer and is required for a majority of the troubleshooting performed on the EF-Series unit. Refer to the ROCLINK Configuration Software User Manual for additional information.

2.8.1 Backup Procedure Before Removing Power

Use the following backup procedure when removing or adding components. This procedure preserves the current flow computer configuration and log data held in RAM.

Before removing power to the EF-Series unit for repairs, troubleshooting, or upgrades, perform this backup procedure.

CAUTION

When working on units located in a hazardous area (explosive gases may be present), make sure the area is in a non-hazardous state before performing these procedures.

CAUTION

To avoid circuit damage when working inside the unit, use appropriate electrostatic discharge precautions, such as wearing a grounded wrist strap.

Launch the ROCLINK Configuration Software.

Ensure that the configuration is saved in flash memory by performing a Write to Internal Config Memory (use the ROC Flags screen accessed from the ROC menu). This saves all configuration settings, including the current states of the ROC Flags and calibration values.

If you will be replacing the flash chip, save the current configuration data to disk by using the Save function in the File menu. This action saves the configuration to an .fcf file (you can specify your own file name and path if desired).

Select Collect Data from the ROC menu. Ensure the All box is checked and click OK. This action saves event logs (.evt), alarm logs (.alm), report data (.det), hourly logs (.pdb), and daily (.day) logs (you can specify your own file name and path if desired).

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2.8.2 Resetting the EF-Series Unit

If you are experiencing problems with the EF-Series unit that appear to be software related, try resetting the EF-Series unit. As described in the following paragraphs, there are three ways to reset the unit:

♦

Warm S ta rt .

♦

Cold Start.

♦

Jumper Reset.

For example, if security was enabled on both communication ports of the EF-Series unit, the settings were saved to permanent memory, and then the ID and/or Passwords were lost, communications with the EF-Series unit will be locked out on both ports until a Jumper Reset is performed; then the host port could be used, since its security is disabled by default.

If none of these methods seem to help, the EF-Series unit may need to be returned to the factory for repair. Contact your Fisher Representative.

2.8.2.1 Warm Start

This re-initialization is performed by setting a parameter in the System Flags. The re-initialization includes the Tasks, Database, Communication Ports, Sensor, and I/O. This does not change the current configuration of any parameters. Refer to Figure 2-9.

Launch the ROCLINK Configuration Software.

Go to the ROC Flags screen.

Set the Warm Start flag.

Apply or save the change.

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Figure 2-9. ROC Flags

Alternately, you can perform a warm start by removing power from the EF-Series unit and then restoring it. Make sure that jumper P1 on the Main Electronics Board is in the NORM position for a warm start to take place.

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2.8.2.2 Cold Start

This re-initialization is performed by setting a parameter in the System Flags, called Cold Start Options. The re-initialization includes the Tasks, Database, Communication Ports, Sensor, I/O, and restoring the saved configuration if there is one. It also includes other items, based upon the selection made in the Options screen shown in Figure 2-10.

Figure 2-10. Cold Start Options

Launch the ROCLINK Configuration Software.

Perform the Backup Procedure in Section 2.8.1.

Select the ROC Flags screen, and select the Cold Start flag.

Click the Cold Start Options pushbutton.

Select the type of Cold Start you desire. Select “Restore Config and Clear All of above” to reset all options.

Click OK.

Apply or save the change.

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2.8.2.3 Jumper Reset

The Main Electronics Board has a jumper located at P1 in the upper right-hand corner that can be used to perform a special type of cold start. Refer to Figure 2-11. This jumper permits a power-up reset to re-establish a known operating point. The includes reinitializing the Tasks, Database, Communication Ports, Sensor, and I/O and restoring the factory default configuration. This cold start does not include any of the clearing options available in a Cold Start performed by using ROCLINK (see Section

2.8.2.2).

CAUTION

This type of reset restores the factory configuration defaults. Some user-entered configuration parameters may be lost; therefore, try to back up any needed data before performing this reset.

NORM

RST

DOC0277U

Figure 2-11. Reset Jumper Shown in Normal Position

Refer to Section 2.8.1 and perform the Backup Procedure.

Disconnect the Power terminal block to remove power.

Install the P1 jumper in the reset (RST) position.

Apply power by plugging in the Power terminal block at P8.

Remove the P1 jumper and install it in the normal (NORM) position.

Refer to Section 2.8.3 and perform the After Installing Components procedure.

This reset action loads the factory default values into all configurable parameters.

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2.8.3 After Installing Components

After removing power to the EF-Series unit and installing components as needed, perform the following steps to start your EF-Series unit and reconfigure your data. The procedure assumes you are using the ROCLINK Configuration Software.

CAUTION

Ensure all input devices, output devices, and processes remain in a safe state upon restoring power.

CAUTION

When working on units located in a hazardous area (explosive gases may be present), make sure the area is in a non-hazardous state before performing these procedures.

Reconnect power to the EF-Series unit by inserting the Power terminal plug into the P8 Power connector.

Launch the ROCLINK Configuration Software, log in, and connect to the flow computer.

Verify that the configuration is correct. If it is not, continue by configuring the needed items. If major portions or the entire configuration needs to be reloaded, perform the remaining steps.

Select Download from the File menu.

From the Open dialog box, select the backup configuration file (has extension *.FCF).

Select the portions of the configuration you want to download (restore).

Click on Download to restore the configuration.

2.8.4 Replacing the Main Electronics Board

The Main Electronics Board in the EF-Series flow computer is not intended to be replaced by the enduser. Contact your Fisher Representative or sales office, who will arrange for its repair and replacement as necessary. For reference purposes only, the replacement procedure is as follows:

CAUTION

There is a possibility of losing the device configuration and historical data while performing the following procedure. As a precaution, save the current configuration and historical data as instructed in Section 2.8.1.

When installing units in a hazardous area, make sure installation components selected are labeled for use in such areas. Installation and maintenance must be performed only when the area is known to be nonhazardous.

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Using the EF-Series Unit

To avoid circuit damage when working with the unit, use appropriate electrostatic discharge precautions, such as wearing a grounded wrist strap.

During this procedure, all power will be removed from the EF-Series unit and any devices powered by it. Ensure that all connected input devices, output devices, and processes remain in a safe state when power is removed from the EF-Series unit and also when power is restored.

Refer to Section 2.8.1 on page 2-28 for the Backup Procedure Before Removing Power.

Disconnect the Power input connector at P8 from the Main Electronics Board.

Remove the communications card by carefully pulling or prying the card loose from the lower compression stand-offs first, the upper compression stand-off next, and finish by unplugging the card from its mating connector. Disconnect wiring from the communications card as needed to clear the way for removing the Main Electronics Board.

CAUTION

Label and remove all wiring connected to the Main Electronics Board.

Remove the Main Electronics Board from the five compression stand-offs securing the card, and lift the board out of the case. You may need to carefully pry the board off the stand-offs if you are unable to loosen the board by hand.

Install the new Main Electronics Board in the case. Firmly press the board over the compression stand-offs to secure the board to the case. The compression stand-offs “snap” into place when the card is secured.

Reconnect wiring removed in Step 4, and re-install the communications card removed in Step

Plug the Main Electronics Board Power wiring into socket P8.

Refer to Section 2.8.3, After Installing Components.

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2.8.5 Sensor Replacement

Damaged or faulty Sensor units must be returned to the factory for repair. To maintain the approval rating of the EF-Series unit, this replacement procedure should be performed only by a certified agent.

Refer to Section 2.8.1 on page 2-28 for the Backup Procedure Before Removing Power.

Disconnect the POWER input connector at P8 from the Main Electronics Board.

Disconnect the P/DP input terminal connector from the Main Electronics Board.

Remove the four bolts holding the Sensor in place.

Return the Sensor to your Fisher Representative.

Position the new or repaired Sensor, ensuring gasket is in place, and install the four bolts to secure the Sensor.

Reconnect the P/DP ribbon cable connector to the Main Electronics Board.

Refer to Section 2.8.3, After Installing Components.

2.9 SPECIFICATIONS

Refer to the following pages for specifications of the main electronics board. For Sensor specifications, refer to Section 4.

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Main Specifications

PROCESSOR INFORMATION

Motorola 32 bit, running at 14.7 MHz.

Program Memory:

programmable) for firmware and configuration.

Data Memory:

backed for up to 4 weeks.

Memory Reset:

initialization when used during power-up.

TIME FUNCTIONS

Clock Type:

supply, super capacitor-backed. Year/Month/Day and Hour/Minute/Second, with Daylight Savings Time control.

Clock Accuracy: Watchdog Timer:

second and resets the processor.

DIAGNOSTICS

These conditions are monitored and alarmed: SRAM validity/operation, Sensor and RTD point fail, battery and charging voltages, internal temperature.

COMMUNICATIONS

Operator Interface:

Software configured, 600 to 19.2K baud rate selectable. Screw-cap protected connector.

Host:

communications card is installed.

POWER

Battery Input:

up). 0.2 W typical, including Sensor power, but excluding power for discrete output load and communications card.

Charging Input:

limited to 1.0 amp.

LOCAL DISPLAY

2 line by 16 character LCD. Continually updates approximately every 3 seconds. See Environmental specification for operating temperature.

FLOW SENSOR (BUILT-IN)

See Specifications table in Section 4.

RTD INPUT (BUILT-IN)

Quantity/Type:

element.

Terminals:

input, “-” signal negative input, and “Ret” return (common).

32 kHz crystal oscillator with regulated

Serial or modem interface, when optional

“Ref” current source, “+” signal positive

512 Kbyte flash ROM (electrically

512 Kbyte SRAM, super capacitor-

A reset jumper enables a cold start

0.01%. Hardware monitor expires after 1

EIA-232 (RS-232D) format.

8 to 15 Vdc (normally 10.8 Vdc to start

14 to 22 Vdc. Charge current internally

Single input for a 2, 3, or 4-wire RTD

RTD INPUT (BUILT-IN) (CONTINUED)

Sensing Range: Accuracy:

(includes linearity, hysteresis, repeatability).

Ambient Temperature Effects per 28° C (50° F):

±0.50° C (.90° F) for process temperatures from -40 to 100° C (-40 to 212° F).

Band-pass hardware filter.

Filter: Resolution: Conversion Time: Sample Period:

DISCRETE OUTPUT (BUILT-IN)

Quantity/Type:

output.

Terminals:

(common).

Voltage:

0.7 volts.

Frequency: Sample Period: Current Limit:

ENVIRONMENTAL

Operating Temperature:

°F), excluding LCD display, which is -25 to 70 °C (-13 to 158 °F).

Storage Temperature:

°F).

Operating Humidity: Vibration:

an abbreviated endurance dwell test.

Radiated/Conducted Transmissions:

with requirements for Class A Information Technology Equipment per EN 55022 (1995) and CISPR 22 (1993). Also complies with FCC Part 15 Class A.

Voltage Surge Immunity:

801-4 and IEC 801-5, as required by EN 50082-2.

ENCLOSURE

Construction:

steel with lockable hasp and gasketed door. Coating is light gray polyurethane paint. All unpainted hardware is stainless steel. Meets CSA Type 4 rating (NEMA 4 equivalent).

Wiring access:

in bottom.

Same as applied to Battery Input minus

-50 to 100° C (-58 to 212° F).

±0.56° C (1.0° F) over sensing range

16 bits.

100 µsec.

1 sec minimum.

1 sourced, high-side switched

“+” positive output, “-” negative

1.5 Hz maximum. 200 ms minimum.

300 mA, automatic reset.

-40 to 75 °C (-40 to 167

-50 to 85 °C (-58 to 185

5 to 95%, non-condensing.

Tested to SAMA 31.1 Condition 3, with

Complies

Designed to meet IEC

Powder-coated 14-gauge carbon

Three 0.88 in. pre-punched holes

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Main Specifications (Continued)

DIMENSIONS

Overall:

(457 mm by 350 mm by 184 mm). Height includes top mounting flange and Sensor.

Wall Mounting:

by 350 mm) between mounting hole (0.38 in. diameter) centers.

Pipestand Mounting:

U-bolt mounting kit (supplied).

18.12 in. H by 13.80 in. W by 7.25 in. D

2.81 in. W by 13.80 in. H (72 mm

Mounts on 2-inch pipe with

WEIGHT

28.5 lb (13.0 kg) nominal, including Sensor and coupler, but excluding batteries (not supplied).

APPROVALS

Approved by CSA as W40079 controller for hazardous locations Class I, Division 2, Groups A, B, C, and D.

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SECTION 3 — COMMUNICATION CARDS

3.1 SCOPE

This section describes the communication cards used with the eFlow EF-Series Flow Computer.

Topics covered include:

♦

Product Descriptions

♦

Initial Installation and Setup

♦

Connecting the Communication Cards to Wiring

♦

Troubleshooting and Repair

♦

Specifications

3.2 SECTION CONTENTS

This section contains the following information:

Information Section Page Number

Product Descriptions 3.3 3-2

EIA-232 Serial Communications Card 3.3.1 3-3

Power Cycling 3.3.1.1 3-4 EIA-485 Serial Communications Card 3.3.2 3-5 Dial-up Modem Communications Card 3.3.3 3-6

Initial Installation and Setup 3.4 3-8

Installing Communications Cards 3.4.1 3-8

Connecting Communications Cards to Wiring 3.5 3-10

EIA-232 Communications Card Wiring 3.5.1 3-10

Auxiliary Power Wiring 3.5.1.1 3-10 EIA-485 Communications Card Wiring 3.5.2 3-11 Dial-Up Modem Communications Card Wiring 3.5.3 3-12

Troubleshooting and Repair 3.6 3-13

Replacing a Communications Card 3.6.1 3-13

Communication Cards Specifications 3.7 3-15

Serial Card Specifications 3.7.1 3-15 Dial-up Modem Card Specifications 3.7.2 3-16

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Communication Cards

3.3 PRODUCT DESCRIPTIONS

The communications cards provide communications between the EF-Series unit and the Internet host system provided by the eFlow Internet Measurement Services powered by Aurion. The communications cards install directly onto the Main Electronics Board at P3 and activate the host port (Comm1) when installed. The following cards are available:

♦

EIA-232 Serial Communications Card (standard)

♦

EIA-485 Serial Communications Card (optional)

♦

Dial-up Modem Communications Card (optional)

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3.3.1 EIA-232 Serial Communications Card

The EIA-232 communications card meets all EIA-232 specifications for single-ended, RS-232 asynchronous data transmission over distances of up to 50 feet. Refer to Figure 3-1. The EIA-232 communications card provides transmit, receive, and modem control signals. Normally, not all of the control signals are used for any single application.

This is the standard communications card for the host port of the EF-series Unit. The EIA-232 communication card’s P1 connector plugs into the Main Electronics Board at P3 and activates Comm1.

The RTS and DTR control lines are supported. The EIA-232 communications card defaults are: 9600 baud rate, 8 data bits, 1 stop bit, no parity, 10 millisecond Key-On Delay, and 10 millisecond Key-Off Delay. If you need to change any of these default values, use the ROCLINK software. The maximum baud rate allowed by the software is 19.2k.

The EIA-232 communications card includes LED indicators that display the status of the RXD, TXD, DTR, DCD, and RTS signal/control lines. LED indicators are detailed in Table 3-1.

Power Control

Mating Connector

Host Port (Comm1) Terminals

Figure 3-1. EIA-232 Serial Communications Card

Rev 2/01 3-3

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Communication Cards

Table 3-1. Communications Cards LED Indicators

LEDs STATUS AND ACTIVITY

The AA is the automatic answer indicator LED light. An incoming modem transmission lights this indicator.

DCD The DCD data carrier detect LED lights when a valid carrier tone is detected.

DTR

The DTR data terminal ready LED lights when a signal from the processor specifies the device is ready to answer an incoming transmission. When the DTR goes off, a connected device disconnects.

The OH is the off hook indicator LED light. A dial tone has been detected and the telephone line is in use by your modem when OH is lit.

RTS The RTS ready to send LED lights when a signal from the processor specifies the

modem is ready to transmit.

RXD The RXD receive data LED blinks when the receive signal is being received from

the communications card. The LED is on for a space and off for a mark.

TXD The TXD transmit data LED blinks when transmit signal data is being received

from the processor. The LED is on for a space and off for a mark.

3.3.1.1 Power Cycling

This function is available with the EIA-232 communications card to provide power savings when using a radio or cell phone for communications. Power cycling control is accomplished through Power Control Terminals or the DTR signal on the EIA-232 communications card. Connect wiring as described in Section 3.5.1. Configure power cycling using the Radio Power Control feature as described in the ROCLINK User Manual.

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EF-Series Instruction Manual

3.3.2 EIA-485 Serial Communications Card

The EIA-485 communications cards meet EIA-485 specifications for differential, RS-485 asynchronous transmission of data over distances of up to 4000 feet. Refer to Figure 3-2. The EIA485 drivers are designed for true multi-point applications with multiple devices on a single bus.

This is an optional communications card for the host port. The P1 connector on the EIA-485 communication card plugs into the Main Electronics Board at P3, activating Comm1.

The interface lines of RTS are supported to control transmission. RTS must be active during TXD. The default values for the EIA-485 communications card are: 9600 Baud Rate, 8 Data Bits, 1 Stop Bit, No Parity, 10 millisecond Key On Delay, and 10 millisecond Key Off Delay. The maximum baud rate is 19.2k.

The EIA-485 communications card includes LED indicators that display the status of the RXD, TXD, and RTS control lines. LED indicators are detailed in Table 3-1.

Mating Connector

LEDs

Figure 3-2. EIA-485 Serial Communications Card

Rev 2/01 3-5

Host Terminals – Comm1

Communication Cards

3.3.3 Dial-up Modem Communications Card

The dial-up modem communications card supports V.22 bis/2400 baud communications with autoanswer/auto-dial features. Refer to Figure 3-3. The modem card is FCC part 68 approved for use with public-switched telephone networks (PSTNs). The FCC label on the card provides the FCC registration number and the ringer equivalent. The modem card has automatic adaptive and fixed compromise equalization.

This is an optional communications card for the host port. The dial-up modem communications card’s P1 connector plugs into the Main Electronics Board at P3, activating Comm1.

The defaults for the dial-up modem communications card are: 2400 baud rate, 8 data bits, 1 stop bit, no parity, 10 millisecond Key On Delay, and 10 millisecond Key Off Delay. On power up, the modem must be set up for Auto Answer. Periodic checks are made to ensure that the modem is still in Auto Answer or that it is not left off the hook after a certain period of non-communication.

Mating Connector

Figure 3-3. Dial-up Modem Communications Card

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The modem card interfaces to two-wire, full-duplex telephone lines using asynchronous operation at data baud rates of 1200 and 2400. The card interfaces to a PSTN through an RJ11 jack located at the bottom of the communications card. The modem can be controlled using industry-standard AT command software. A 40-character command line is provided for the AT command set, which is compatible with EIA document TR302.2/88-08006.

LED indicators on the card show the status of the RXD, TXD, AA, and OH control lines. Refer to Table 3-1. The modem card also provides RS-232 level output signals (RXD and TXD) for an analyzer.

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Communication Cards

3.4 INITIAL INSTALLATION AND SETUP

Communications card installation is normally performed at the factory when the EF-Series unit is ordered. However, the modular design of the unit makes it easy to change hardware configurations in the field. The following procedures assume that this is a first-time installation of a communications card in an EF-Series unit and that the unit is currently not in service. For units currently in service, refer to the procedures in Section 3.6, “Troubleshooting and Repair.”

CAUTION

When installing units in a hazardous area, ensure that the components selected are labeled for use in such areas. Change components only in an area known to be nonhazardous.

CAUTION

Be sure to use proper electrostatic handling, such as wearing a grounded wrist strap, or components on the circuit cards may be damaged.

3.4.1 Installing Communications Cards

All communications cards install into the EF-Series unit in the same manner.

Unplug the Power terminal block at P8 to ensure power is removed.

Plug the communications card connector P1 into connector P3 on the Main Electronics Board.

Figure 3-4 shows the card location. Gently press the connectors together until the card contacts a stand-off.

Ensuring that the three stand-off holes in the communications card line up with the

compression stand-offs on the Main Electronics Board, firmly press the communications card onto the stand-offs.

Plug in the Power terminal block at P8 to allow power to be applied.

With the EF-Series unit powered up, and a PC connected to the LOI port and running the

ROCLINK software, ensure that the configuration associated with the communications card is correct. If not, change as needed.

Perform wiring as instructed in Section 3.5.

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EF-Series Instruction Manual

Stand-off Hole

Mating Connector

Communications Card

Stand-off Hole

Figure 3-4. Communications Card Location

Rev 2/01 3-9

Communication Cards

3.5 CONNECTING COMMUNICATIONS CARDS TO WIRING

Signal wiring connections to the communications cards are made through the terminal block located on the serial communications cards, or through the RJ11 TELCO connector supplied on the modem card.

3.5.1 EIA-232 Communications Card Wiring

The EIA-232 communications card provides for RS232 signals on the host port. This communications card also provides a means to switch external power to communication devices such as a radio to conserve power. LEDs are provided for diagnostic functions. The screw terminals and their functions are as follows:

Terminal Function

RXD Receive data TXD Transmit data DTR Data Terminal Ready RTS Ready to Send DCD Data Carrier Detect GND Ground IN Switched Power input (Out) Switched power output

3.5.1.1 Auxiliary Power Wiring

Switched auxiliary power is used for radios or other devices that do not have a built-in sleep mode to automatically shut the device off. Control of auxiliary power is set up by using the Radio Power Control function of the ROCLINK software to achieve the required power cycling. The switched method involves wiring the power through the EIA-232 communications card as shown in Figure 3-5.

If the auxiliary device already has a built-in sleep mode, or for some reason you do not need to cycle the auxiliary power, you can wire directly to the RADIO terminals for power as described in Section 2.

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EF-Series Instruction Manual

RS232

Comm

Card

Switched Power

to Radio or

–

Other Device

Figure 3-5. Wiring Switched Auxiliary Power

3.5.2 EIA-485 Communications Card Wiring

The EIA-485 communications card provides for RS-485 signals on the host port (Comm1). Wiring should be twisted-pair cable. This board also provides additional protection for the external wiring and the board circuitry. LEDs are provided for diagnostic functions. The terminals and their functions are as follows:

Terminal Function

A RS485 positive B RS485 negative GND Ground

Rev 2/01 3-11

Communication Cards

3.5.3 Dial-Up Modem Communications Card Wiring

The dial-up modem card interfaces to a PSTN line through the RJ11 jack located at J2 with two wires. The dial-up modem card provides for a telephone interface on the host port that is capable of both answering and originating phone calls. The dial-up modem card also provides electronics that conserve power when the phone line is not in use. The dial-up modem card provides some protection from transients on the phone lines; however, if the potential for lightning damage is high, additional surge protection for the phone lines should be installed outside the EF-Series enclosure.

LEDs are provided for diagnostic functions. The dial-up modem card provides a modular phone (RJ11) jack that directly interfaces to phone line connections. The RJ11 conductors and their signals are:

RJ11 Signal

1 2 3Tip 4Ring 5 6

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EF-Series Instruction Manual

3.6 TROUBLESHOOTING AND REPAIR

There are no user serviceable parts on the communications cards. If a card appears to be operating improperly, verify that the card is set up according to the information contained in Section 3.4, “Initial Installation and Setup.” If it still fails to operate properly, the recommended repair procedure is to remove and replace the card. The faulty card should be returned to your Fisher Representative for repair or replacement.

Follow the procedures below to help ensure data is not lost and equipment is not damaged during replacement of a communications card.

3.6.1 Replacing a Communications Card

If you are installing a communications card for the first time, refer to Section 3.4. To remove and replace a communications card on an in-service EF-Series unit, perform the following procedure. Be sure to observe the cautions to avoid losing data and damaging equipment.

CAUTION

When repairing units in a hazardous area, ensure that the components selected are

labeled for use in such areas. Change components only in an area known to be non-

hazardous.

CAUTION

There is a possibility of losing the flow computer’s configuration and historical data

while performing the following procedure. As a precaution, save the current

configuration and historical data as instructed in Section 2.8.1, Backup Procedure.

CAUTION

Be sure to use proper electrostatic handling, such as wearing a grounded wrist

strap, or components on the circuit cards may be damaged.

CAUTION

During this procedure, all power will be removed from the EF-Series unit and

devices powered by the EF-Series unit. Ensure that all connected input devices,

output devices, and processes will remain in a safe state when power is removed

from the unit and also when power is restored.

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Communication Cards

Refer to Section 2.8.1 and perform the RAM Backup Procedure.

Remove the Power terminal block at P8 on the Main Electronics Board.

If the communications card is a modem card, unplug the RJ11 phone jack cable from the

communications card connector J2.

Using a rocking motion, gently disengage the two stand-off connectors located at the bottom of

the communications card.

Using a rocking motion, gently disengage the stand-off connector located at the top, middle of

the communications card.

Using a rocking motion to disengage the connectors at P1, pull the card free from the Main

Electronics Board at P3.

To reinstall a communications card, orient the card with the P1 connectors on the

communications card mating with the connectors at P3 on the Main Electronics Board. Plug the card into its mating connectors and gently press until the connectors firmly seat.

Using a rocking motion, gently engage the stand-off connectors.

For a modem card, connect the RJ11 phone jack cable to communications card connector J2.

Reconnect power by plugging in the Power terminal connector at P8 on the Main Electronic

10.

Board.

Check the configuration data, and re-load or modify as required.

11.

Verify that the EF-Series unit performs as required.

12.

Perform the After Installing Components detailed in Section 2.8.3.

13.

If you changed the configuration, save the configuration data to permanent memory. It is also good practice to save the configuration data to a disk file. See Section 2.8.1 for information on how to perform these saves.

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EF-Series Instruction Manual

3.7 COMMUNICATION CARDS SPECIFICATIONS

The following subsections list the specifications for each communications card.

3.7.1 Serial Card Specifications

EIA-232D CARD

EIA-485 CARD

Meets EIA-232 standard for singleended data transmission over distances of up to 50 feet (15 m).

Data Rate:

19.2k baud.

Format:

(software selectable) with full handshaking.

Parity:

(software selectable).

Meets EIA-485 standard for differential data transmission over distances of up to 4000 feet (1220 meters) for multiple devices.

Data Rate:

19.2k baud.

Format:

(software selectable).

Parity:

(software selectable).

Selectable from 1200 to

Asynchronous, 7 or 8-bit

None, odd, or even

Selectable from 1200 to

Asynchronous, 7 or 8-bit

None, odd, or even

LED INDICATORS

POWER REQUIREMENTS

ENVIRONMENTAL

WEIGHT

DIMENSIONS

APPROVALS

Individual LEDs for RXD, TXD, and RTS signals. EIA-232D card also has LEDs for DTR and DCD.

4.75 to 5.25 Vdc, 0.03 W maximum (not including radio power), supplied by processor board.

Operating Temperature:

75 °C (-40 to 167 °F).

Storage Temperature:

°C (-58 to 185 °F).

Operating Humidity:

relative, non-condensing.

0.8 oz. (23 g) nominal.

0.7 in. H by 2.0 in. W by 2.75 in. L (18 by 51 by 70 mm).

Covered by CSA approval for the unit in which card is installed.

-40 to

-50 to 85

To 95%

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Communication Cards

3.7.2 Dial-up Modem Card Specifications

OPERATION Mode:

up PSTN (Bell 212 compatible).

Data Rate:

asynchronous (software selectable).

Parity:

(software selectable).

Format:

including start, stop, and parity (software selectable).

Modulation:

phase-coherent FSK; V.22 and 212A, 4 point DPSK at 600 baud; V.22bis, 16 point QAM at 600 baud.

Transmit Carrier Frequencies:

Originate, 1200 Hz ± 0.1%; Answer, 2400 Hz ± 0.1%.

Receive Carrier Frequencies:

Originate, 2400 Hz ± 7 Hz; Answer, 1200 Hz ± 7 Hz.

Transmit Amplitude:

typical.

Telephone Line Impedance:

600 ohm typical.

RTS to Transmission Delay:

Configurable in 50 millisecond periods (software selectable).

Receiver Sensitivity:

threshold, -45 dBm. On to Off threshold, -48 dBm.

Full-duplex 2-wire for dial-

1200 or 2400 baud

None, odd, or even

8, 9, 10, or 11 bits,

V.21 and 103, binary

-1 dB

Off to On

OPERATION (CONTINUED)

POWER REQUIREMENTS

ENVIRONMENTAL

DIMENSIONS

WEIGHT

APPROVALS

Maximum Output Level:

dBm nominal into 600 ohms.

LED Indicators:

AA, and OH.

Connector:

Surge Protection:

FCC part 68 and DOC.

Surge Isolation:

1500 volt peak.

Certification:

approved.

4.5 to 5.5 Vdc, 0.25 W maximum, supplied by processor board.

Operating Temperature:

75 °C (-40 to 167 °F).

Storage Temperature:

85 °C (-58 to 185 °F).

Operating Humidity:

relative, non-condensing.

0.7 in. H by 2.0 in. W by

2.75 in. L (18 mm by 51 mm by 70 mm).

1.3 oz. (36 g).

Covered by CSA approval for the unit in which card is installed.

TXD, RXD,

RJ11 (6-pin).

1000 Vac and

FCC Part 68

Conforms to

-40 to

-50 to

To 95%

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EF-Series Instruction Manual

SECTION 4 — THE FLOW SENSOR

4.1 SCOPE

This section describes the orifice-metering Flow Sensor (also called a DVS or Dual-Variable Sensor), which provides differential pressure and static pressure inputs to the EF-Series flow computer for the orifice flow calculation. Note that the Sensor is not equipped to provide a temperature input to the flow computer; this input comes directly into the unit by means of the built-in RTD input. Refer to Section 2.

This section contains the following information:

Information Section Page Number

Description 4.2 4-1 Process Connections 4.3 4-2 Sensor Wiring 4.4 4-2 Configuration 4.5 4-3 Calibration 4.6 4-4

Verifying Calibration 4.6.1 4-4 Calibrating the Meter Inputs 4.6.2 4-5 Zero Shift 4.6.3 4-8

Specifications 4.7 4-8

4.2 DESCRIPTION

The orifice-metering Flow Sensor measures differential pressure and static pressure by converting the applied pressure to electrical signals and making the readings available to the Main Electronics Board. The sensor housing screws into an adapter, which in turn mounts with four bolts to the bottom of the EF-Series enclosure. The Sensor cable plugs directly into the Main Electronics Board at the P/DP connector.

The readings from the Sensor are stored in analog inputs on the EF-Series Unit. The differential pressure value uses the Analog Input (AI) Point Number A1, and the static pressure value uses the AI Point Number A2. If the alarm for either point is enabled and the sensor fails to communicate, during either initialization or operation, an alarm is entered in the Alarm Log.

The Sensor uses an interrupt to inform the Main Electronics Board that it is ready for an update. This must occur at least once per second. The flow computer then converts this value and stores it in the proper analog input for access by other functions within the unit. If an update does not occur in the one second interval, the sensor is re-initialized. A point fail alarm is set if the sensor does not respond to the initialization.

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Flow Sensor

4.3 PROCESS CONNECTIONS

Piping from the meter run must be connected to the Flow Sensor of the EF-Series flow computer. Both the static and differential pressures are piped to female ¼-18 NPT connections on the bottom of the Sensor. The EF-Series Unit is an upstream device, meaning that the static pressure line normally must be connected to the high pressure side (labeled “H” on the sensor body).

If you need to use the EF-Series Unit as a downstream device:

Connect the “H” side of the sensor to downstream pressure, so that flow in relation to the

sensor is reversed from its normal direction.

Use ROCLINK to configure the meter run for Downstream operation (this automatically

adjusts the static pressure by adding in the differential pressure).

Calibrate the differential pressure as described in Section 4.6.

4.4 SENSOR WIRING

The EF-Series Unit and its Flow Sensor are shipped from the factory with the wiring connected between them. This wiring consists solely of a ribbon cable from the Sensor, which is plugged into the P/DP connector on the Main Electronics Board at P11. This ribbon cable is keyed to fit into the P11 connector in only one direction.

CAUTION

Always turn power off to the flow computer before you connect or disconnect wiring.

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EF-Series Instruction Manual

4.5 CONFIGURATION

Use ROCLINK Configuration Software to configure the Sensor inputs for an EF-Series Unit.

♦

The differential pressure is configured at Analog Input Point Number A1.

♦

The static pressure (gauge or absolute) is configured at Analog Input Point Number A2.

♦

The Resistance Temperature Detector (RTD) is configured at Analog Input Point Number A3.

The initial pressures are read from the defaults contained within the Sensor. The initial range of the differential pressure is 0 to 250 inches of water and the static pressure is either 0 to 800 psi (55.15 bar) or 0 to 3600 psi (250 bar) depending upon the sensor installed. The ranges can be changed through the calibration routines. It is recommended that the turndown on the range not be greater than what is given in the Specifications table on Page 4-8.

The Sensor also supports the conversion of values to metric units. In metric mode, both the differential pressure and the static pressure are in kPa. To set the metric mode, using ROCLINK for Windows Configuration Software:

Select the ROC menu.

From the pull down menu, select Information.

In the ROC Information window, ensure that the General tab is selected. In the Units area,

click on the Metric radio button.

Click on OK.

To set the metric mode, using ROCLINK (for DOS) Configuration Software:

Select the System menu.

From the pull down menu, select Information.

On the system information display under Units, enable the Metric field.

Press (F8)Save.

The EF-Series Unit automatically adjusts the units, ranges, alarm limits, and calibration factors of the differential pressure, static pressure, RTD, and enclosure/battery temperature to the Metric mode. To return to US units, enable the “US” field and save this change to the flow computer. The EF-Series Unit adjusts the values to US units.

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Flow Sensor

4.6 CALIBRATION

Calibration is performed using the ROCLINK Configuration Software. The procedure allows you to perform a 5-point (minimum, maximum, and up to three intermediate points) calibration of the Sensor.

4.6.1 Verifying Calibration

The ROCLINK (for Windows or for DOS) Configuration Software can be used to verify the calibration. This is normally done as a check to see if a re-calibration is needed. To verify, perform the following steps:

Launch the ROCLINK Configuration Software and connect to the flow computer.

Select the Calibration function from the Meter menu. Alternately, you can select Calibration

from the Quick Setup window (available under File menu). This opens the Meter Calibration window.

The current reading is shown under each meter input as the Freeze Value. These values will be

used in the flow calculations while the points are being verified. Press the Freeze pushbutton (not present for Quick Setup Calibration, since in this case freezing is automatic).

CAUTION

To protect the differential cell of the Sensor, open the by-pass valve on the valve manifold prior to isolating the sensor from the process. This will keep one side of the differential sensor from being subjected to high pressure while the other side has no pressure applied. This should be done whether you are calibrating differential or static pressure. Refer to Figure 4-1 on page 4-6 for the recommended sequence.

Observing the caution above, apply the desired pressure setting to the input.

Select the Verify pushbutton that is listed under the input to calibrate. This displays the Verify

Calibration dialog box.

If the Tester Value and the Live Reading are to be logged to the Event log as a record of the

verification, select the Log Verify pushbutton. Press Done to return to the Meter Calibration window.

Repeat the above steps for any other inputs that need to be verified.

Observing the following caution, place the Sensor back in service.

CAUTION

To protect the differential cell of the Sensor, do not close the by-pass valve on the valve manifold until after process pressure has been reapplied. This will keep one side of the differential sensor from being subjected to high pressure while the other side has no pressure applied. Refer to Figure 4-2 on Page 4-7.

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EF-Series Instruction Manual

When complete, select the OK (or Done) pushbutton to close the Calibration window, to

cancel the freeze values, and to begin using live readings for the flow calculations.

4.6.2 Calibrating the Meter Inputs

The ROCLINK Configuration Software (for Windows or for DOS) is used to perform initial calibration or re-calibration, such as after an orifice plate is changed in the meter run handled by the EF-Series Unit.

Perform the following steps:

Launch the ROCLINK Configuration Software and connect to the flow computer.

Select the Calibration function from the Meter menu.. Alternately, you can select Calibration

from the Quick Setup window (available under File menu). This opens the Meter Calibration

window.

The current reading is shown under each meter input as the Freeze Value. These values will be

used in the flow calculations while the points are being verified. Press the Freeze pushbutton

(not present for Quick Setup Calibration since in this case freezing is automatic).

CAUTION

To protect the differential cell of the Sensor, open the by-pass valve on the valve

manifold prior to isolating the sensor from the process. This will keep one side of

the differential sensor from being subjected to high pressure while the other side

has no pressure applied. This should be done whether you are calibrating

differential or static pressure. Refer to Figure 4-1 on page 4-6 for the

recommended sequence.

If you are calibrating a pressure input, read the Caution above, and then isolate the Sensor from

the process. If you are calibrating a temperature input, simply proceed to the next step.

If you are calibrating a pressure input, set up the pressure calibrator and make the necessary

connections to the Sensor. If you are calibrating a temperature input, disconnect the RTD

sensor and connect a decade box (or comparable equipment) to the RTD terminals of the flow

computer.

Select the Calibrate pushbutton under the desired input. This begins the calibration sequence

with the Set Zero dialog box.

Apply the low (zero) value. For a pressure input, this would typically be open to atmosphere.

Enter the applied value in the Dead Weight / Tester field of the Set Zero dialog. For static

pressure on an absolute-pressure device (standard for EF-Series Units), remember to enter the

actual atmospheric pressure, such as 14.73 psi.

Rev 2/01 4-5

Flow Sensor

High Pressure Remains

Open

Bleed

Operating Shutdown Sequence

Shutdn2

Figure 4-1. Removing the Sensor from Service

When the displayed Live Reading is stable, select the Set Zero pushbutton to calibrate the zero

reading. The Set Span dialog box then appears.

Apply the desired lower-end value to the input (the top end of the expected operating range).

10.

To maintain rated accuracy, be sure to observe the turndown limits listed in the Specifications Table on page 4-8. [If you are calibrating the Diff Press input, and the Sensor is configured for Downstream operation, be sure to apply the calibrator pressure to the low (labeled “L”) side of the Sensor; the Live Reading will appear as a negative value. Static pressure for Downstream is calibrated the same as for Upstream.]

Blee

Enter the applied value in the Dead Weight / Tester field of the Set Span dialog. For static

11.

pressure on an absolute-pressure device, remember to add in the actual atmospheric pressure, such as 300 + 14.73. [If you are calibrating the Diff Press input, and the Sensor is configured for Downstream operation, enter the value as positive, even though the Live Reading is a negative value. The software will automatically compensate.]

When the Live Reading is stable, select the Set Span pushbutton to calibrate the high reading.

12.

The calibration sequence advances to the Set Midpoint 1 dialog box.

If a midpoint (up to three midpoints are possible) is to be calibrated, apply the desired pressure

13.

or temperature and enter the applied value in the Dead Weight / Tester field. Note that the midpoints can be calibrated in any order. If you are done calibrating, select the Done pushbutton

When the Live Reading is stable, select the Set Mid pushbutton to calibrate this reading. The

14.

display advances to the next midpoint dialog box.

If additional midpoints are to be calibrated, repeat the above two steps.

15.

When the calibration for a selected point is complete, you have the choice to calibrate another

16.

input or to complete the calibration. If calibration is complete, and you calibrated pressure inputs, read the following Caution and then return the Sensor to service.

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EF-Series Instruction Manual

To protect the differential cell of the Flow Sensor, do not close the by-pass valve on

the valve manifold until after process pressure has been reapplied. This will keep

one side of the differential sensor from being subjected to high pressure while the

other side has no pressure applied. Refer to Figure 4-2.

CAUTION

Pre-Startup

start2

Open

Startup Sequence

Figure 4-2. Returning the Sensor to Service

NOTE

If you calibrated the Differential Pressure input, refer to Section 4.6.3, Zero Shift,

before completing the last step.

Finally, select the OK (or Done) pushbutton to cause the calibration window to close,

17.

freeze values to be canceled (unfrozen), and live readings to resume being used for the flow calculations. All calibration settings that were changed are automatically recorded into the Event Log of the flow computer.

Rev 2/01 4-7

Flow Sensor

4.6.3 Zero Shift

If desired, the Zero Shift procedure can be used after calibrating the differential pressure input. The reason for performing Zero Shift is due to the fact that the Differential Pressure is calibrated without line pressure being applied to the sensor. When the sensor is connected back to the process after calibration, a shift in the differential pressure can occur due to the influence of the line pressure. This effect can be canceled out with a Zero Shift adjustment.

To check or adjust for Zero Shift, leave the sensor by-pass valve open (to simulate a no-flow condition), with either line pressure or a normal operating static pressure from the calibrator applied to the sensor. This applies the same pressure to both sides of the differential pressure diaphragm to give a zero differential pressure reading.

Perform the following steps:

Ensure the ROCLINK Configuration Software is connected to the flow computer and running

the calibration procedure, with the meter inputs “frozen.”

In the Meter Calibration window, under the Diff Press input, select the Zero Shift pushbutton

to open the Set Zero Shift dialog box.

Check the Live Reading to determine if a Zero Shift correction needs to be performed.

If the reading is not zero, use the Set Zero Shift pushbutton to adjust the Zero Shift. If

adjustment is not needed, use the Done pushbutton. Either way, you are returned to the Meter Calibration window, where you can select OK (or Done) to close the calibration window, cancel the freeze values, and cause the flow computer to use live readings for the flow calculations.

4.7 SPECIFICATIONS

Flow Sensor Specifications

DIFFERENTIAL PRESSURE INPUT

: 0 - 250 in H

Range Reference Accuracy:

linearity, hysteresis, and repeatability effects) for spans up to 10:1 turndown.

Stability:

STATIC PRESSURE INPUT

Range:

! 0 - 800 psia (0 -5516 kPa) ! 0 - 3626 psia (0 - 25,000 kPa)

Reference Accuracy:

linearity, hysteresis, and repeatability effects) for spans up to 6:1 turndown.

Stability:

±0.1% of upper range limit for 12 months.

Absolute pressure measurement:

±0.1% of upper range limit for 12 months.

O (0 - 62.2 kPa)

±0.075% of span (includes

PROCESS CONNECTIONS

1/4-18 NPT on 2-1/8 inch centers, located on bottom of Sensor.

CONSTRUCTION

316 SST. Wetted O-rings are glass-filled TFE. Coupler is stainless steel (CF8M).

ENVIRONMENTAL AND OTHER SPECS

Meets specifications described in the Main Electronics Specifications table in Section 2.

4-8 Rev 2/01

EF-Series Instruction Manual



GLOSSARY OF TERMS

A/D — Analog to Digital.

AGA — American Gas Association.

AI — Analog Input.

AO — Analog Output.

Analog — Analog data is represented by a continuous variable, such as a electrical current signal.

AP — Absolute Pressure.

API — American Petroleum Institute.

ASCII — American Standard Code for Information Interchange.

AW G — American Wire Gauge.

BTU — British Thermal Unit, a measure of heat energy.

Built-in I/O — Input/Output channels that are fabricated into the ROC or FloBoss and do not require a

separate module. Also called “on-board” I/O.

COM1 — Port on the flow computer that is used for host communications.

Configuration — Typically, the software setup of a device that can often be defined and changed by

the user. Can also mean the hardware assembly scheme.

CRC — Cyclical Redundancy Check.

CSA — Canadian Standards Association.

CTS — Clear to Send modem communications signal.

D/A — Digital to Analog.

DB — Database.

dB — Decibel. A unit for expressing the ratio of the magnitudes of two electric signals on a

logarithmic scale.

Rev 2/01 G-1

Glossary of Terms



DCD — Data Carrier Detect modem communications signal.

Deadband — A value that is an inactive zone above the low limits and below the high limits. The

purpose of the deadband is to prevent a value such as an alarm from being set and cleared continuously when the input value is oscillating around the specified limit. This also prevents the logs or data storage location from being over-filled with data.

DI — Discrete Input.

Discrete — Input or output that is non-continuous, typically representing two levels such as on/off.

DO — Discrete Output.

DMM — Digital multimeter.

DP — Differential Pressure.

DSR — Data Set Ready modem communications signal.

DTR — Data Terminal Ready modem communications signal.

Duty Cycle — Proportion of time during a cycle that a device is activated. A short duty cycle

conserves power for I/O channels, radios, etc.

DVM — Digital voltmeter.

DVS — Dual-Variable Sensor. Provides static and differential pressure inputs to a FloBoss 503 Flow

Manager or eFlow EF-Series Flow Computer.

EEPROM — Electrically Erasable Programmable Read Only Memory, a form of permanent memory.

EFM — Electronic Flow Measurement.

EIA-232 — Serial Communications Protocol using three or more signal lines, intended for short

distances. Also called RS-232.

EIA-422 — Serial Communications Protocol using four signal lines. Also called RS-422.

EIA-485 — Serial Communications Protocol requiring only two signal lines. Can allow up to 32

devices to be connected together in a daisy-chained fashion. Also called RS-485.

EMF — Electro-motive force.

EMI — Electro-magnetic interference.

ESD — Electro-static discharge.

EU — Engineering Units.

G-2 Rev 2/01

EF-Series Instruction Manual



Firmware — Internal software that is factory-loaded into a form of ROM. In the ROC, FloBoss, or

EF-Series unit, the firmware supplies the software used for gathering input data, converting raw input data calculated values, storing values, and providing control signals.

FlashPAC — ROM (and RAM) module that contains the operating system, applications firmware, and

communications protocol in a ROC300-Series unit.

Flash ROM — A type of read-only memory that can be electrically re-programmed. It is a form of

permanent memory (needs no backup power).

FloBoss — A microprocessor-based flow computer that provides remote monitoring and control.

Trademarked by Fisher Controls.

FM — Factory Mutual.

FSK — Frequency Shift Keyed.

FST — Function Sequence Table, a type of program that can be written by the user in a high-level

language designed by Fisher Controls. One or more FSTs can be set up in a ROC or FloBoss.

GFA — Ground Fault Analysis.

GND — Electrical ground, such as used by the ROC or flow computer power supply.

GP — Gauge Pressure.

HART — Highway Addressable Remote Transducer.

hw — Differential pressure.

I, J

ID — Identification.

IEC — Industrial Electrical Code.

IMS — Internet Measurement Services.

IMV — Integral Multiplier Value.

I/O — Input/Output.

IRQ — Interrupt Request. Hardware address oriented.

IV — Integral Value.

Rev 2/01 G-3

Glossary of Terms



Kbytes or KB — Kilobytes.

kHz — Kilohertz.

LCD — Liquid Crystal Display. Display-only device used for reading data.

LDP — Local Display Panel. A display-only device that plugs into a ROC300-Series unit via a

parallel interface cable. The LDP consists of a 4-line by 20-character alphanumeric display and four pushbuttons used to access information stored by the ROC.

LED — Light-emitting diode.

LOI — Local Operator Interface. Refers to the serial (RS-232) port on the ROC or flow computer

through which local communications are established, typically for configuration software running on a PC.

LPM — Lighting Protection Module. Use this module to provide lightning and power surge

protection for I/O on ROC and FloBoss units.

LRC — Longitudinal Redundancy Checking, a type of error checking.

mA — Milliamps.

MCU — Master Controller Unit.

MPU — Micro-processor Unit.

MVS — Multi-Variable Sensor. The MVS provides differential pressure, static pressure, and

temperature inputs to the FloBoss 407 (or to a Remote MVS Interface) for orifice flow calculation.

mV — Millivolts, or 0.001 volt.

mW — Milliwatts, or 0.001 watt.

NEC — National Electrical Code.

NEMA — National Electrical Manufacturer’s Association.

OH — Off-Hook modem communications signal.

G-4 Rev 2/01

EF-Series Instruction Manual



Off-line — Accomplished while the target device is not connected (by a communications link). For

example, off-line configuration is configuring a ROC in a electronic file that is later loaded into the ROC.

Ohms — Units of electrical resistance.

On-line — Accomplished while connected (by a communications link) to the target device. For

example, on-line configuration is configuring a ROC while connected to it, so that current parameter values are viewed and new values can be loaded immediately.

Opcode — Type of message protocol used by the Fisher ROC or flow computer to communicate with

the configuration software, as well as with host computers.

P, Q

Parameter — A property of a point that typically can be configured or set by the user. For example,

the Point Tag ID is a parameter of an Analog Input point. Parameters are normally edited by using configuration software running on a PC.

Pf — Flowing pressure.

PC — Personal computer.

P/DP — Pressure/Differential Pressure.

PI — Pulse Input.

PID — Proportional, Integral, and Derivative control feedback action.

PLL — Phase Lock Loop.

Point — Software-oriented term for an I/O channel or some other function, such as a flow calculation.

Points are defined by a collection of parameters.

Point Number — The “rack” and number of an I/O point as located in a ROC or flow computer.

PRI — Primary PID control loop.

PSTN — Public switched telephone network.

PT — Process Temperature.

PTIR — Periodic Timer Interrupt.

PTT — Push-to-talk signal.

Pulse — Transient variation of a signal whose value is normally constant.

PV — Process variable.

Rev 2/01 G-5

Glossary of Terms



Rack — For a ROC, a rack is a row of slots into which I/O modules may be plugged. The rack is

given a letter to physically identify an I/O channel location, such as “A” for the first rack. Built-in I/O channels are assigned a rack identifier of “A,” while diagnostic I/O channels are considered to be in rack “E”.

RAM — Random Access Memory. In a ROC or flow computer, it is used to store history, data, most

user programs, and additional configuration data.

RBX — Report-by-exception. In a ROC or flow computer, it always refers to spontaneous RBX in

which the field device contacts the host to report an alarm condition.

RFI — Radio frequency interference.

RI — Ring Indicator modem communications signal.

ROC — Remote Operations Controller, Fisher Control’s microprocessor-based unit that provides

remote monitoring and control.

ROCLINK — Configuration software used to configure Fisher ROCs or flow computers to gather

data, as well as most other functions.

ROM — Read-only memory. Typically used to store firmware. Flash memory.

RTC — Real-time clock.

RTD — Resistance Temperature Detector.

RTS — Ready to Send modem communications signal.

RTU — Remote Terminal Unit (or Remote Telemetry Unit).

RX or RXD — Received Data communications signal.

SAMA — Scientific Apparatus Maker’s Association.

Soft Points — A type of ROC point with generic parameters that can be configured to hold data as

desired by the user.

SP — Static Pressure, or Setpoint.

SPI — Slow Pulse Input.

SPK — Speaker.

SRAM — Static Random Access Memory. Stores data as long as power is applied; typically backed

up by a lithium battery or supercapacitor.

SVA — Signal Value Analog.

SVD — Signal Value Discrete.

G-6 Rev 2/01

EF-Series Instruction Manual



T-Z

TDI — Timed Discrete Input, or Timed Duration Input.

TDO — Timed Discrete Output, or Timed Duration Output.

Tf — Flowing temperature.

TLP — Type (of point), Logical (or point) number, and Parameter number.

TX or TXD — Transmitted Data communications signal.

Rev 2/01 G-7

Glossary of Terms



G-8 Rev 2/01

EF-Series Instruction Manual



INDEX

Numbers

1992 AGA

Flow Calculation .................................................... 2-3

32-bit CMOS Microprocessor..................................... 1-4

AA............................................................................... 3-4

Accessing the Battery Compartment......................... 1-14

Accessories.................................................................. 1-6

After Installing Components ..................................... 2-33

AGA ............................................................................ 2-3

Alarm Log ................................................................... 2-5

Alarming

RBX........................................................................ 2-7

Analog Inputs.............................................................. 4-1

Antennas...................................................................... 1-8

API .............................................................................. 2-3

Approvals .................................................................... 1-9

Archive Type............................................................... 2-4

AT Command .............................................................. 3-7

Automatic Self Tests ................................................. 2-12

Auxiliary Output Power ............................................ 2-21

Auxiliary Power ........................................................ 3-10

Backup Procedures.................................................... 2-28

After Installing Components ................................ 2-33

BAT ........................................................................... 2-18

Battery......................................................................... 1-6

Accessing the Compartment................................. 1-14

Charger................................................................. 2-20

Charging................................................................. 1-6

Connections.......................................................... 2-18

Requirements........................................................ 1-19

Calculations

1992 Flow............................................................... 2-3

Input and Extension................................................ 2-3

Instantaneous Rate.................................................. 2-4

Calibration.......................................................... 2-26, 4-5

I/O Channels......................................................... 1-20

Sensor..................................................................... 4-4

Cathodic Protection.....................................................1-10

Charger...................................................................... 2-20

CHG .......................................................................... 2-18

Class I.......................................................................... 1-9

Clock

Real-Time ............................................................. 2-12

Cold Start................................................................... 2-31

COM1.................................................................1-5, 2-10

Comm Port

Host....................................................................... 2-10

Operator Interface................................................. 2-10

Communication Cards ................................................. 3-1

Communication Ports ................................................ 2-10

Communications

Connectors............................................................ 2-11

Wiring................................................................... 2-24

Communications Cards

Descriptions............................................................ 3-2

Dial-Up Modem...................................................... 3-6

EIA-232 .................................................................. 3-3

EIA-485 .................................................................. 3-5

Installation .............................................................. 3-8

LED Indicators........................................................ 3-4

Location.................................................................. 3-9

Replacing.............................................................. 3-13

Specifications........................................................ 3-15

Troubleshooting.................................................... 3-13

Wiring................................................................... 3-10

Configuration............................................................. 2-26

Flow Sensor ............................................................ 4-3

Verify ......................................................................4-4

Contents................................................................ 3-1, 4-1

Daily Historical Logs................................................... 2-5

DC Power Source ...................................................... 2-18

DCD............................................................................. 3-4

Deadband.................................................................... G-2

Diagnostic.................................................................... 1-4

Analog Inputs .......................................................2-26

Diagnostic Inputs....................................................... 2-12

Dial-Up Modem Communications Cards ....3-6, 3-7, 3-14

Specifications........................................................ 3-16

Wiring................................................................... 3-12

Differential Pressure............................. 2-3, 2-4, 4-3, G-5

Dimensions................................................................ 1-13

Discrete Outputs .................................................1-4, 2-11

Wiring................................................................... 2-23

Division 2 .................................................................... 1-9

DO ......................................................................1-5, 2-11

Downstream Usage of Sensor...................................... 4-2

Doze Mode ................................................................ 2-13

DTR ............................................................................. 3-4

Dual-Variable Sensor

Rev 2/01 I-1

Topical Index

Description ..............................................................4-1

Duty Cycle ....................................................... 1-15, 1-16

E1, E2, and E5............................................................2-12

eFlow EF-Series Flow Computer.................................1-1

EFM .............................................................................1-3

EIA-232 Communications Cards .................................3-3

EIA-485 Communication Cards...................................3-5

Electrical Isolation.......................................................1-10

Electromagnetic Interference .....................................1-10

Electronics Board................................................. 2-1, 2-8

EMF ............................................................................G-2

EMI .................................................................. 1-10, 2-16

Enclosure.............................................................. 1-3, 1-7

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

Energy Accumulation...................................................2-4

Environmental

Requirements...........................................................1-7

Event Log.....................................................................2-6

Extension Calculation ..................................................2-3

Field Wiring ...............................................................2-15

Figure 1-1. eFlow EF-Series Flow Computer .............1-4

Figure 1-2. Outline and Mounting Dimensions.........1-13

Figure 1-3. Solar Insolation in Hours for the United

States ........................................................................1-18

Figure 2-1. Main Electronics Board............................2-9

Figure 2-2. Earth Ground Connection.......................2-17

Figure 2-3. Power Input Terminal Connector............2-17

Figure 2-4. Battery and Solar Panel Connections .....2-19

Figure 2-5. Auxiliary Power Terminals.....................2-21

Figure 2-6. RTD Wiring Terminal Connections........2-22

Figure 2-7. Discrete Output Terminal Wiring ...........2-23

Figure 2-8. Operator Interface Wiring.......................2-25

Figure 2-9. ROC Flags ..............................................2-30

Figure 2-10. Cold Start Options ................................2-31

Figure 2-11. Reset Jumper Shown in Normal Position ....

..................................................................................2-32

Figure 3-1. EIA-232 Serial Communications Card.....3-3

Figure 3-2. EIA-485 Serial Communications Card.....3-5

Figure 3-3. Dial-up Modem Communications Card....3-6

Figure 3-4. Communications Card Location...............3-9

Figure 3-5. Wiring Switched Auxiliary Power..........3-11

Figure 4-1. Removing the Sensor from Service..........4-6

Figure 4-2. Returning the Sensor to Service ...............4-7

Firmware .............................................................. 1-5, 2-3

Flash Memory ..............................................................2-8

Flash ROM...................................................................1-4

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

Flow and Energy Accumulation...................................2-4

Flow Measurement.......................................................2-3

Flow Sensor................................................................. 4-1

Configuration.......................................................... 4-3

Wiring................................................................... 2-25

Flow Time ................................................................... 2-3

Flowing Minutes.......................................................... 2-4

Functions ..................................................................... 2-3

Grid Impedance.......................................................... 1-10

Ground Rod................................................................ 1-10

Grounding

Earth Ground......................................................... 1-10

Ground Wiring...................................................... 2-16

Wiring Requirements............................................ 1-10

Group A....................................................................... 1-9

Group B....................................................................... 1-9

Group C....................................................................... 1-9

Group D....................................................................... 1-9

Groups C, and D.......................................................... 1-9

Hardware Watchdog .................................................. 2-13

Hazardous Locations ................................................... 1-9

History Log.................................................................. 2-5

History Points.............................................................. 2-4

Host Port.................................................................... 2-10

Wiring.......................................................... 2-25, 3-10

Hourly Historical Log.................................................. 2-5

I/O

Built-in.................................................................... 1-4

I/O Power Requirements ........................................... 1-15

I/O Wiring Requirements .......................................... 1-11

Impedance

Grid....................................................................... 1-10

Input and Extension Calculation.................................. 2-3

Input Terminal Wiring............................................... 2-16

Installation

Communications Cards........................................... 3-8

Guidelines............................................................... 1-7

Startup .................................................................. 1-20

Wiring................................................................... 2-15

Instantaneous Rate Calculations.................................. 2-4

Integral Multiplier Value

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

Integral Value .............................................................. 2-4

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

Isolation ..................................................................... 1-10

J, K

Jumper

Reset ..................................................................... 2-32

I-2 Rev 2/01

EF-Series Instruction Manual

LCD........................................................................... 2-10

LEDs

Communications Cards .......................................... 3-4

Liquid Crystal Display ....................................... 1-4, 2-10

Local Operator Interface

LOI .........................................................1-5, 1-6, 2-10

LOI Wiring........................................................... 2-24

LOI ............................................................................ 2-10

Low Power Modes .................................................... 2-13

Main Electronics Board.................. 1-3, 1-4, 2-1, 2-8, 2-9

Replacing.............................................................. 2-33

MDS .......................................................................... 1-14

Memory....................................................................... 2-8

Metric .......................................................................... 4-3

Microprocessor..................................................... 1-4, 2-8

Minute Historical Log ................................................. 2-5

MOSFET ................................................................... 2-23

Mounting.......................................................... 1-12, 1-13

Radio .................................................................... 1-14

National Electrical Code

NEC........................................................................ 1-9

OH............................................................................... 3-4

Operation................................................................... 1-20

Operator Interface Port..................................... 2-10, 2-24

LOI .................................................................. 1-5, 1-6

Wiring................................................................... 2-24

Options ........................................................................ 1-6

Orifice-metering Sensor .............................................. 1-5

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

P, Q

P/DP ............................................................................ 4-2

Periodic

Timer Interrupt ............................................. 2-13, G-5

Phase Lock Loop.........................................................G-5

Piping ................................................................. 1-12, 4-2

Polarity.............................................................. 1-20, 2-12

Power

Auxiliary Output - Radio...................................... 2-21

Battery Connections ............................................. 2-18

Before Removing ................................................. 2-28

Charge Connections.............................................. 2-20

Consumption ........................................................ 1-15

Consumption Table............................................... 1-15

Cycling for Radio ................................................... 3-4

I/O Requirements.................................................. 1-15

Low Modes........................................................... 2-13

Main DC ............................................................... 2-18

Operating .............................................................. 2-12

Radio Requirements.............................................. 1-16

Requirements.......................................................... 1-9

Sleep Mode........................................................... 2-13

Solar Power........................................................... 1-17

Standby Mode....................................................... 2-13

Totaling Requirements.......................................... 1-16

Wiring................................................................... 2-17

Power Control.............................................................. 2-6

Power Cycling

Radio..................................................................... 2-21

Pressure ...................................................................... G-5

Pressure Connections................................................... 4-2

Process Connections...........................................1-12, 4-2

Processor ..................................................................... 1-4

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

Public Switched Telephone Networks

PSTNs..................................................................... 3-6

Radio Bracket ..................................................... 1-6, 1-14

Radio Frequency Interference.................................... 1-10

Radio Power .............................................................. 3-10

Radio Power Control ................................................... 2-6

Radio Power Cycling..........................................2-21, 3-4

Radio Power Requirements ....................................... 1-16

Radio Terminal

Auxiliary Output Power........................................ 2-21

RAM............................................................................ 1-4

Backup Procedure................................................. 2-28

RBX Function.............................................................. 2-7

Real-Time Clock......................................2-12, 2-13, 2-14

Rebooting

See Resetting the EF-Series Unit.......................... 2-29

Repair ........................................................................2-28

Replacing

Communications Cards......................................... 3-13

Report by Exception

RBX...................................................................... 2-11

Reset Jumper .............................................................2-32

Resetting the EF-Series Unit .....................................2-29

RFI.................................................................... 1-10, 2-16

ROC/FloBoss Accessories Instruction Manual ...........1-2

ROM

Flash ....................................................................... 1-4

RS232 Communication Card

Wiring................................................................... 3-10

RTD .....................................1-4, 1-5, 2-3, 2-12, 2-13, 4-3

Wiring................................................................... 2-21

RTS.....................................................................2-24, 3-4

RXD............................................................................. 3-4

Rev 2/01 I-3

Topical Index

Section Contents..........................................................3-1, 4-1

Security.....................................................1-5, 2-6, 2-10, 2-29

Sensor

Calibration .......................................................................4-4

Downstream Usage ........................................................4-2

Orifice-metering.............................................................1-5

Replacement..................................................................2-35

Upstream Usage.............................................................4-2

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

Sensor Wiring.....................................................................2-25

Site Requirements ...............................................................1-8

Sleep Mode.........................................................................2-13

Software Watchdog...........................................................2-13

Solar Arrays

Refer to Solar Panels ...................................................1-17

Solar Panels ..................................................................1-6, 1-8

Power..............................................................................1-17

Sizing..............................................................................1-17

Specifications .....................................................................2-35

Communications Cards...............................................3-15

Dial-Up Modem Communications Cards................3-16

Serial Communications Cards....................................3-15

SRAM....................................................................................1-4

Standby Mode....................................................................2-13

Startup........................................................................1-20, 4-6

Startup and Operation.......................................................1-20

Static Pressure.....................................................2-3, 2-4, 4-3

Static Random Access Memory

SRAM...............................................................................2-8

System Voltage...................................................................1-16

Table 1-1. Power Consumption of the EF-Series Unit

and Powered Devices......................................................1-15

Table 1-2. Solar Panel Sizing..........................................1-18

Table 2-1. Power Control Defaults..................................2-7

Table 2-2. Discrete Outputs ............................................2-11

Table 3-1. Communications Cards LED Indicators ......3-4

TDO......................................................................................2-11

Temperature...............................................1-7, 2-3, 2-4, 2-13

Terminal Connections.......................................................2-15

Tests

Automatic ......................................................................2-12

Timer Interrupt .........................................................2-13, G-5

Totaling Power Requirements .........................................1-16

Troubleshooting................................................................2-28

Communications Cards...............................................3-13

Reset...............................................................................2-29

TXD.......................................................................................3-4

Type RL101 ROCLINK Configuration Software User

Manual ................................................................................1-2

Units ......................................................................................4-3

Vibration...............................................................................1-8

Voltage.................................................................................1-16

W, X

Warm Start..........................................................................2-29

Watchdog

Software and Hardware ...............................................2-13

Wiring..........................................................................2-1, 2-15

Auxiliary Power...........................................................3-10

Battery Connections....................................................2-18

Battery Power Charger................................................2-20

Communications ..........................................................2-24

Communications Cards...............................................3-10

Dial-Up Modem Communications Cards................3-12

Discrete Outputs ..........................................................2-23

EIA-485 Communications Cards ..............................3-11

General...........................................................................2-15

Grounding.....................................................................2-16

Grounding Requirements ...........................................1-10

Host................................................................................3-10

I/O Wiring.....................................................................1-11

Input Terminals.............................................................2-16

LOI..................................................................................2-24

Power..............................................................................2-17

Radio ..............................................................................2-21

RS232 Communications Card ....................................3-10

RTD................................................................................2-21

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

Wire Gauge...................................................................2-17

Zero Shift..............................................................................4-8

If you have comments or questions about this manual, please contact your Fisher Representative or contact:

FRFC Technical Documentation c/o Fisher Controls International, Inc. 1612 South 17th Avenue Marshalltown, Iowa 50158 FAX: 641-754-3630

I-4 Rev 2/01

EFLOW EF-Series Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual