Micro Motion Remote Flow Transmitter - Model RFT9729 Owner's Manual

Below you will find brief information for Flow Transmitter RFT9729. This instruction manual details the operation, installation, and maintenance of the Remote Flow Transmitter (RFT9729) and its integration with Micro Motion flow sensors. The RFT9729 is used to convert sensor signals into 4-20 mA and frequency outputs, providing data for flow rate, temperature, density, and flow total.

PDF

Document

March 1991

Rosemount, SMART FAMIL~ and HART are trademarks of Rosemount Inc.. Eden Prairie. MN.

Hastelloy is the trademark of Gabot Gorp.. Kokomo. IN.

Teflon is the trademark of E.I. Du Pont de Nemours Go. Inc.. Wilmington. DL.

1991. Micro Motion. Inc

Tables

Table

Specifications to OMS Wiring,

Figures

Figure 1-1

Figure 2-1

Figure 2-2

Figure 2-3

Figure 2-4

Figure 2-5

Figure 3-1

Figure 3-2

Mounting Dimensions

Back Panel Connections

Wiring

Diagram

Diagram for the for the

D6 through

D600

D300

RS-485

HART

Location

Wiring

Network Wiring of Jumpers and Test Points on the Processor

Changing the Jumper Settings

Board

Table of Contents

2.1

2.2

2.3

2.4

2.4.1

2.4.2

2.4.3

2.5

2.5.1

2.5.2

2.5.3

2.5.4

2.5.5

2.5.6

1.1

1.2

1.2:1

1.2.2

1.2.3

1.3

1.4

1.5

1.5.1

3.1

3.2

3.3

3.4

3.5

3.5.1

3.6

3.6.1

3.6.1.1

3.6.1.2

3.7

Independent Remote of and of Flow Sensors and Transmitters.

Button

Transmitter

General

Installation

Installing the Transmitter

Power Connections

Signal Wiring; Sensor to the Transmitter

Cable

Sensor

Intrinsically

Transmitter

Connections

Conduit Connections

Safe

Output

Wiring

Requirements

Analog

Frequency

Output Wiring

Flow Direction

DMS Wiring

RS-485 Wiring

Multidrop Wiring

Wiring for the Milliamp Output

Start-Up

Jumper Configuration on the Processor Board

Power.

Transmitter Auto Zeroing

Using the LED

General Guidelines

Symptom Definitions

Trouble-shooting

Wiring the RFT 9729

Internal Test Points

Customer Service

Appendix I

Appendix II

Appendix III

Exploded Drawing of the RFT9729

RFT9729 Configuration Record

Model 268 SMART FAMILY@ Interface Flow Diagram

The Remote Flow lrransmitter

1.1 General Description

1.2 Theory of Operation

1.2.1 Communication

1.2.2 Fault Detection and

Diagnostics

The Micro Motion@ Remote Flow Transmitter (RFT9729) is a microprocessor-based mass flow transmitter. The transmitter, in conjunction with a Micro Motion flow sensor, forms a complete mass flowmeter system.

The transmitter converts the low-Ievel signals from the sensor to 4-20 mA and frequency outputs. The 4-20 mA signal can be configured to transmit a flow rate, temperature, or density signal. The frequency output is always a flow rate signal. The transmitter also produces digital signals for flow rate, flow total, density, and temperature that can be read by a Rosemount@ Model 268 SMART FAMILY Interface or a HART-compatible controlsystern. Optionally, RS-485 can be selected as a digital communications medium.

Circuitry in the transmitter compensates for individual flow sensor characteristics, allowing interchange with any Micro Motion Model D flow sensor.

The RFf9729 interfaces with Model D Mass Flowmeters. The input circuit measures the signals from the left and right velocity detectors on the sensor tube(s). The input data is digitally filtered to reduce noise and increase the measurement resolution. This input data is then converted into flow rate data using the flow calibration factor and the sensed temperature.

The drive circuit generates an oscillatory voltage to vibrate the tubes. The frequency of oscillation is at the natural frequency of the sensor, and therefore, a process fluid density measurement can be calculated from the measured natural frequency of the sensor.

A temperature amplifier converts the resistance of the sensor-mounted platinum RTD to a linearized voltage (i.e., 5 mV per OC) for digitization, temperature compensation of the sensor, and the Density Monitoring System (DMS) output. The temperature compensation has a resolution of 0.1°C and a range of -240° to 450°C (-400° to 842°F).

The transmitter can be easily used with another Micro Motion sensor simply by entering the correct calibration data.

The transmitter is programmed to communicate with other digital equipment using the

HART protocol. For more information on transmitter protocol, please refer to the Remote

Flow Transmitter Digital Communications Instruction Manual, July, 1989, PIN 1002798.

Device interconnection is accomplished by using the transmitter mA output terminals.

As an alternative, an RS-485 interface is also available through jumper configuration on the processor board and is compatible with the transmitter protocol.

The SMART FAMILY Interface (268) allows direct digital configuration and access to diagnostics of the transmitter. The 268 connects to the transmitter via the 4-20 mA current output loop and communicates with the transmitter at the transmitter site, from the control room, or from any other wiring termination point in the loop. The 268 is generic and can be used with any RFT9729 transmitter. The same 268 can also be used with any

Rosemount SMART FAMILY transmitter. For more information on the 268, see the instruction manual entitled Using the SMART FAMILY Interface 268 with the Micro

Motion Remote Flow Transmitter, Section 1.

1.2.3 Meter Zeroing

1.3 Independent Exchange of

Flow Sensors and

Transmitters

1.4 Modular Electronics

1.5 Display

The digital communications protocol is designed to assist in fault detection and diagnostics. Fault detection is designed to ensure the functional integrity of the meter and electronics including the velocity transducers, drive coil, and RTD. During start-up, the

RFT9729 microprocessor checks its RAM and EPROM. A watchdog timer monitors the operation of the microprocessor to ensure recovery from software malfunctions.

Detected faults, which could cause an error exceeding the accuracy specification, can be displayed on the 268. Within the RFT9729 itself, if a fault is detected that may indicate malfunc.'tion of the flowmeter, the mA and frequency outputs are set to an upscale or downscale level (see Section 3.1, Jumper Configuration on the Processor Board) as an indication that a failure has occurred. Also, the LED on the front panel flashes on at 4 Hz if a fault condition occurs. The LED flashes on at 1 Hz during normal operation.

Zero flow adjustment (i.e., sensor offset adjustment) is accomplished with the Set Zero

Flow key switch on the front panel, an externally wired set zero switch, or with the communications protocol auto zero command. During zero flow adjustment, the LED on the front panel remains on indicating that a zero flow calibration is in progress. The transmitter will not allow an excessive sensor offset during meter zeroing, protecting against zeroing while excessive fluid flow exists. See Section 3.3, Transmitter Auto

Zeroing.

Transmitters and flow sensors may be replaced separately since each sensor is calibrated at the factory and marked with flow calibration and density calibration factors.

Sensors and transmitters calibrated at the factory have matching serial numbers on their respective nameplates. To match different transmitters and flow sensors, the calibration factors are simply entered into the transmitter using the communications protocol. No additional calibration or equipment is necessary. For sensors manufactured before calibration factors were put on each unit, contact Micro Motion at 1-800/522-MASS (522-6277) in Boulder, Colorado for the U.S., or 31-08385-63911 in Veenendaal, the Netherlands, for

Europe. Also, your local service/sales office can assist you.

The electronics in the transmitter can be removed from the housing and replaced separately, This is facilitated by modular construction and plug-in cable connectors (See

Appendix I, Exploded Drawing). Interchangeability allows one electronics module to serve as a spare for many transmitters.

A 4 line, 20 character display is incorporated in the RFT9729 front panel. This display shows the following information:

Flowrate

Density

Temperature

Totalizer

(*)

(*:

(*) denotes which process variable is the mA output (one only).

1.5.1 Totalizer Reset Button

The totalizer reset button has 2 functions. If the button is depressed and kept in position, the totalizer value is stopped. When released the totalizer value is reset to zero.

Table 1 Specifications

Functional Specifications

Flow Sensor Compatibility

Compatible with all Model D sensors with either 7 -wire or 9-wire feedthroughs and 3-wire platinum RTD (temperature sensor).

Compatible with all Model DL sensors with either 7-wire or 9-wire feedthrough or Camloc connector and 3-wire platinum RTD.

Compatible with all Model D sensors with 2-wire copper RTD when rewired as 3-wire at sensor cable interconnection. Temperature and density measurement accuracy will be somewhat degraded.

Rangeability

Flow: Minimum span equal to 4.0 microsec. of time difference between velocity sensor signals. Maximum span equal to 240.0 microsec. of time difference between velocity sensor signals. Range limits from -120.0 microsec. to +120 microsec. time difference between velocity signals. Zero may be suppressed or elevated. The 50:1 electronics rangeability encompasses the range limits of the flow sensor. See sensor specifications for min. and max. spans of individual sensors.

Density: Minimum span of 0.1 g/cc.

Maximum span of 5.0 g/cc.

Range limits from 0.0 to 5.0 g/cc

Temperature: Lower limit of -240°C (-400°F)

Upper limit of 450°C (840°F)

Minimum span of 20°C

Maximum span of 690°C

Power Supply

Standard: 12 to 30 VDC, 6.5 watts typical, 14 watts maximum. 1 amp minimum start-up current. Fuse rating: 2 amp. Fuse located on back panel.

Optional: 115 VAG :t25%, 48 to 62 Hz, 9 watts typical, 14 watts maximum or 230 VAG

:t25%, 48 to 62 Hz, 9 watts typical, 14 watts maximum. Fuse rating: 0.25 amp. Fuse located on back panel.

Humidity Limits

Meets SAMA PMC 31.3, Section 5.2

Ambient Temperature Limits

Operating

0 to 50°C (32 to 122°F)

Storage

-20 to 70°C (-4 to 158°F)

3

4

Output Signals

* 4 to 20 mA, internally powered, galvanically isolated to :t50 VDC, 0 to 1000 ohm load.

The mA output can represent flow rate, temperature, or density (user-configurable). Maximum ripple of 1.5% of span at greater than 20 kHz.

* 0 to 15 volt frequency representing flow rate, 2.2k ohm pull-up, galvanically isolated to

:t50 VDC. Sinking capability 0.10 amps in the .'on" condition (0 V level), 30 VDC compliance with the internal pull-up removed in the '.off" condition. Maximum "on" pulse width of 6, 12, or 24 milliseconds, depending on configuration.

* Bell 202 digital communications signal superimposed on 4-20 mA signal, available for host control system interface. Frequency 1.2 and 2.2 kHz, amplitude 1.0 to 2.0 mA peakto-peak, baud rate 1200 bits-per-second. Load resistance between 250 and 1000 ohms required. HART protocol compatible.

Optional: RS-485 digital communication signal referenced ~o sensor ground. Amplitude

:t5 V square wave, baud rate 1200 bits-per-second. HARr protocol compatible.

* 0 to 15 volt flow direction, 2.2k ohm pull-up, referenced to frequency output return line.

Sinking capability 0.10 amps in the "on" condition (reverse flow) 30 VDC compliance with the internal pull-up removed in the "off" condition (forward flow).

* 2.5 VAG at sensor natural frequency, referenced to sensor ground, 10k ohm output impedance. Used for interface to Micro Motion Density Monitoring System.

* 5 mVrC sensor temperature, referenced to sensor ground, 10k ohm output impedance. Used for interface to Micro Motion Density Monitoring System.

ScaJeabJe mA Output Adjustment

Engineering units and range points user-selectable between rangeability limits for either flow rate, temperature, or density.

Scaleable Frequency Output Adjustment

* Frequency set point scaleable from 1 to 10,000 Hz in 1 Hz increments.

* Flow rate set-point scaleable from minimum span to upper range limit. Zero flow rate always equals zero Hz, frequency linear to flow rate.

Frequency output replaced by 2ND mA output

The secondary milliamp output replaces the frequency output. This has consequences for the hardware as well as the software.

Hardware

The connection terminal points for the secondary milliamp output are:

-48-pin connector (24b) 4-20mA-

(28b) 4-20mA+

Software. (Programming)

Standardwise both mA-outputs will be adjusted to meet in our factory the desired range unless otherwise specified.

In case the secondary mA-output must be (re)adjusted one will have to do this through the frequency function key with a SFI268 interface.

The 10.000 Hz point corresponds with the 20 mA output.

For example: -desired range 0-500 kg/h

-secondary mA-output 4-20 mA over the above mentioned rate.

Frequency must be programmed to be 10.000 Hz at 500 kg/h. Automatically the 20 mA will correspond with 500 kg/h.

Slug Flow Inhibit

Transmitter senses density outside of user-selectable density limits and drives the flow outputs to indicate zero flow.

Scaleable Low Flow Cutoff

Engineering units and low-ftow cutoff value user-selectable. Below selected value, digital, milliamp and frequency outputs are driven to zero.

Damping

User-selectable: 0.2, 0.4, 0.8, 1.6, 3.2, 6.4, or 12.8 seconds time constant.

Over Range Capability

* Milliamp output 2 mA (-12.5% of span) to 22 mA (+112.5% of span)

* Frequency output 11 ,520 Hz

Diagnostics

User-selectable downscale (2 mA and a Hz) or upscale (22 mA and 11520 Hz) when failure of auto zero, sensor, temperature sensor, or electronics is detected.

Output Testing

* Current source:

Transmitter may be commanded to supply a specified current between 2 and 22 mA.

* Frequency source:

Transmitter may be commanded to supply a specified frequency between 1 and 10,000

Hz.

Turn-On Time

Less than 10 seconds

Warm-Up Time

Transmitter reaches stable operation in less than 30 minutes.

Sensor Compensation

Sensors are flow and density calibrated and assigned calibration factors at the factory.

The calibration factors are entered into the transmitter enabling interchangeability of sensors within 0.1% of reading on flow accuracy, 0.001 g/cc on density accuracy and 0.5°C

:to.25% of reading in °C on temperature accuracy.

Hazardous Location Certification

CENELEC

[EEx ib] lIB* or [EEx ib] IIC*

* with approved sensor

5

Performance Specifications (Reference operating conditions unless otherwise specified. Definitions per AN81/18A

851.1 -1979 unless otherwise specified.)

Accuracy (sensor included):

(includes effects of linearity, hysteresis, and repeatability)

Flow: :to.2010 of rate :to.O1010 of sensor upp~r range limit.

Density: .:to.001 g/cc; DL 100, DL200, D300, and D600

:to.002 g/cc; D65, D100 and D150

:to.004 g/cc; D40, D25, D12, ~nd D6

Temperature: :t1 °G :to.5% of reading expr~ssed in "G

Repeatability (sensor included):

Flow: :!=0.05% of rate :!=0.005% of sensor upper range limit

Density:

:to.OO10 g/cc; 065, 0100 and 0150

:to.OO2 a g/cc; 040, 025, 01 ~, and 06

Temperature:

:to.2°C

Ambient Temperature Effect (transmitter on/~)

Flow: Zero effect :to.OO2% of sensor upper range limit tC.

Span effect :to.OO2% of span tC.

Density:

:to.00005 g/cc/"F; OL 100, OL200, 0300, and 0600

:to.0001 g/ccrF; 065, 0100 and 0150

:to.0002 g/ccrF; 040, 025, 012, and 06

Temperature:

Analog :to.O1 "Ct'C

Digital :to.10''Ct'C

RFI Effect (sensor excluded)

Level 1, :to.8% of span at 1 Vim per IEC 8d1.3 -1984

Level 2, :t4.00% of span at 3 Vim per IEC 801.3 -1984

Class 3, A, B, C, :to.8% of span at 1 Vim pftr SAMA PMC 33.1

Class 1, A, B, C, :t4.00% of span at 3 Vim per SAMA PMC 33.1

Class 2, A, B, C, :t15% of span at 10 Vim per SAMA PMC 33.1

Conductive conduit for sensor cable, which is earth grounded at both ends, is required for RFI protection within this specification.

Vibration Effect (transmitter only)

Meets SAMA PMC 31.1, Level

Physical Specifications

Supply Voltage Effect (sensor included)

Meets supply voltage effect requirements of SAMA PMC 31

5.10.5

section 5.10.1 through

Electronics Housing

Half 19" cassette. 42TEx 3HE; gray PVC-coated panels

Dimensions: 213 W by 128 H by 235 mm D (8.4 W by 5 H by 9.3 in D)

Weight: 2,6 kg (5.7 Ib)

Electrical Connections

Din 41612 Type F 48 pole connector for sensor and output signals. Separate main supply connector is available.

Cable from Sensor to Transmitter

3 individually shielded twisted pairs, ,minimum 20 AWG, for 7 wire sensors. Less than 30 pF-per-foot interwire capacitance u~ to 500 ft (150 meters) total cable length.

4 individually shielded twisted pairs,: minimum 22 AWG, minimum 18 AWG for drive pair for 9 wire sensors. Less than 30 pF-li>er-foot interwire capacitance up to 1000 ft (300 meters) total cable length.

7

8 Figure 1.1

Mounting Dimensions

RFT9729

37 TE

(188 mm)

UJ E

I "

M aj

I~ ~~-~

42 TE

(213 mm)

FRONT

...

SIDE

Transmitter Installation

2.1 General

2.2 Installing the Transmitter

For information regarding installation of the flow sensor, please refer to the Micro Motion

Sensor Instruction Manual. This instruction manual is included with the sensor when shipped from the factory.

The transmitter should be placed in an easily accessible place in a safe area.

Use separate conduits or cable trays for power and signal wiring. Cable tray installation requires Micro Motion supplied Teflon@ wiring or equivalent cable tray compatible wiring.

Transmitter wiring connections are located on the back panel of the unit.

Wiring connections to the 025 through 0300 sensors are made within the supplied juction box. The juction box is not attached to the sensor when shipped. Attach and position the junction box on the sensor manifold as desired. Unscrew the junction box cover to access the 9-position terminal strip. Wiring instructions are placed in the juction box when it is shipped from the factory with a sensor. Refer to these directions when making connections to the transmitter.

For applications in which cable temperatures are above 150°F (65°C) or below 32°F

(0°C), the light blue, Teflon-jacketed cable should be used. For applications in which temperatures stay between 32° to 150°F (0° to 65°C), the medium blue, PVC-jacketed cable can be used. The standard cable supplied is 10 feet (3 meters) long. Up to 1000 feet (300 meters) of cable can be used between the transmitter and sensor. Cable lengths between 10 and 1000 feet are available from the factory.

Note: Operation of the meter may be detrimentally affected if cable other than Micro Motion color-coded cable is used.

WARNING: To maintain intrinsic safety and performance, only low power signal cables can be routed through the conduit alongside the sensor wiring.

When mounting the transmitter, Micro Motion recommends following the practices described below.

1. Mount the transmitter in an environment which protects it from ambient temperatures below 00 or above 50°C (below 32°F or above 122°F).

2. Accessibility is important when mounting the transmitter. Be sure to mount the unit so that it is accessible for calibration, reconfiguration, reading data or servicing.

9

2.3 Power Connections 'k / DANGER: POWER MUST BE OFF WHEN MAKING WIRING CONNECTIONS.

The transmitter comes set up for either 12 to 30 VDG, 100/115 VAG, or 220/230 VAG.

CAUTION: Power supply voltage must agree with the voltage stated on the selector switch mounted on the back panel.

AC input power connections are made at seperate terminals of the transmitter indicated with P, N, and the ground symbol. The individual terminal blocks may be disconnected and removed from the housing for ease of wiring and service. When the meter is used with a OC power supply, terminal 20 is positive and terminal 28 is negative. Earth ground is established at the ground lug at the back panel and must be connected (See Fig. 2-1 ).

CAUTION: Failure to connect earth ground to the ground lug in the terminal compartment will nullify the meter's intrinsically safe rating.

Figure 2-1

Back Panel

Connections

(S)

F: SELECTOR

230V

O,25A O

188 BI

2A O

'-'NU I

BACKPLANE

W.O96.B.443

S.O97.B.203

BOARD

REV 1

RFT9729 =

EARTH

ZER~

ZERO +

MA+

LED +

LED -

BACK i 13TE

1!66MM>

-..

I I

("\

I I

1%:

(/) z w

(/)

.:1

2.4 Signal Wiring; Sensor to the Transmitter

2.4.1 Cable Connections

Signal connections are made via the interconnect cable between the sensor unit and terminals 8 through 26 of the transmitter. Refer to Figures 2-2 for Models 06 through

0300 and Figure 2-3 for the Model 0600. Only low power signal cables may be routed through conduit alongside the sensor wiring if intrinsic safety requirements must be maintained.

The transmitter end of the cable must be prepared in the field. Micro Motion, Inc. supplies the necessary butt-splices, sp'ade-Iugs, shrink-tubing, solder-sleeve connection wire, and instructions with each meter. Individual wires are color-coded for easy identification.

Refer to Figure 2-2 or 2-3 to connect cable to the transmitter.

Wiring connections to the 025 through 0300 sensors are made within the supplied junction box. The junction box is not attached to the sensor when shipped. Attach and position the junction box on the sensor manifold as desired. Unscrew the junction box cover to access the 9-position terminal strip. Wiring instructions are placed in the junction box when it is shipped from the factory with a sensor. Refer to these directions when making connections to the transmitter.

Note: For 7-wire feedthrough sensors, the wires must be paired exactly as shown below.

If the cable is not supplied by Micro Motion, Inc., make certain each pair is individually shielded and that 20 gauge or larger diameter wire is used. The ground shield for the wire pair connected to terminal 14 and 16 must be connected to the yellow wire at the sensor junction box and to terminal 12 at the transmitter. Be sure that the bare shields are insulated against potential shorting, such as to the meter case.

-Wires connected to transmitter terminals 10d (brown) and 8d (red) must be paired together.

-Wires connected to terminals 14d (orange) and 16d (violet) must be paired together.

-Wires connected to terminals 20d (green) and 24d (blue) must be paired together.

-Ground shield for the pair connected to terminals 14d and 16d must connect to terminal

12d (yellow)

-Ground shields for the other wire pairs connect to terminal 26d at the transmitter and are not connected at the sensor.

For 9-wire feedthrough sensors, the pairing is as follows:

-Wires connected to transmitter terminals 10d (brown) and Bd (red) must be paired together.

2.4.2 Sensor

Connections

Conduit

2.4.3 Intrinsically Safe Wiring

Requirements

2.5 Transmitter Output Wiring

2.5.1 Analog Output Wiring

Wires connected to terminals 14d (orange) and 16d (violet) must be paired together.

Wires connected to terminals 20d (green) and 18d (white) must be paired together.

Wires connected to terminals 24d (blue) and 22d (gray) must be paired together.

-Ground shield for the pair connected to terminals 14d and 16d must connect to terminal

12d (yellow)

-Ground shields for the other wire pairs connect to terminal 26d at the transmitter and are not connected at the sensor.

Flexible conduit shou!d be UL listed as explosion-proof. Explosion-proof conduit is not required with the sensor wiring for intrinsic safety on sensors up to and including the

D300. The connection must, however, be sealed.

The terminal area of the transmitter is partitioned to separate intrinsically safe wiring from non-intrinsically safe wiring. Intrinsically safe wiring to the sensor is labeled "Intrinsically

Safe Terminals." Only sensor wiring should enter this connector.

Wiring to output devices should be separated from input power wiring to avoid possible electrical interference. Therefore, separate connectors are provided for output devices.

Outputs are not intrinsically safe.

When connecting a receiver to the RFT9729 milliamp output circuit, terminals 14b and

16b are used. Terminal 16b is the signal line (+) and terminal 14b is the return (-). The negative signal (terminal 14) may be grounded or left ungrounded since it is galvanically isolated up to :t50 VDC. Twisted pair, shielded cable should be used for long runs.

The 4-20 mA signal output can power loop-powered process indicators, such as the Micro Motion Model PI 4-20 Process Indicator. A minimum loop resistance of 250 ohms is required for SMART FAMILY communication. The maximum loop resistance cannot exceed 1000 ohms. Shields for the output signals should be connected to ground only at the transmitter end (terminal 2z, 4 b d z).

2.5.2 Frequency Output Wiring

(Optionally replacable by 2nd current output)

2.5.3 Flow Direction Wiring

2.5.4 OMS Wiring

The frequency output is galvanically isolated up to :f:50 VDC. The output circuit is rated to

30 VDC, 0.1 ampere maximum sinking capability. The output from the transmitter is a nominal 15 volt logic level square wave, unloaded. The output impedance is 2.2k ohms at the 15 volt logic level. If receivers other than Micro Motion products are used, please refer to their instruction or operating manuals their input voltage and current requirements.

To connect a frequency output receiver, use terminal 28b (+) as the signal line and terminal 24 (-) as the return. The frequency output wiring should be twisted pair and no smaller than 22 gauge shielded cable. Shields for the output signals should be connected to ground only at the transmitter end (terminal 2z, 4 b d z).

To connect the transmitter for flow direction indication, use terminal 26b (+) as the signal line and terminal 24b (-) as the return. The output circuit is rated to 30 VDC, 0.1 ampere maximum sinking capability. The output from the transmitter is a nominal 0 to 15 volt logic level, unloaded. The output impedance is 2.2k ohms at the 15 volt logic level. With forward flow, the output is high (+15 V); with reverse flow, the output is low (0 V). Near zero flow, this output could be in either state due to zero stability. The flow direction output can be used as an input to directional totalizers such as the Micro Motion DRT.

To connect the RFT9729 to a Density Monitoring System (DMS), use three-wire shielded cable. Use of a DMS barrier is not necessary with the RFT9729. No more than 500 feet of shielded cable should be used between the RFT9729 and the DMS. Wire size should be

22 gauge or larger diameter.

Figure 2-2

Wiring Diagram for the D6 through D300

Non Intrinsically

CN2

16b

18b

2Ob

22b

24b

26b

28b

3Ob

32b safe outputs

2b see terminal on page 16

4bdzL

8b zerozero+

1Ob 485A

12b

14b

4858 mAmA+

DMS gnd

DMS temp

DMS period

Freq FIR-

FIR+

Freq.+

Led+

Ledconnection d b

W'

[8]

0=0 o o

Installation Instructions

Type Cenelec

Intrinsically safe outputs

CNc ad

10d

12d

14d

16d

18d

20d

22d

24d

2ad drive- -red drive+ -brn temp gnd -yel temp- -or temp+

LPO-

LPO+

RPO-

RPO+ shield

-viol

-whc

-grn

-grey

-blue

-shield

Non-h.z.rdou. Art.

d b

(~ution

1 10 malnt~ln Intrlnsl(1 sale1 y, sale wlrin!, must be separatec

I from all other wlrln(j

110/11SV p N ...

220/230V e> p N

Caution: power supply must agree with the

Potential Equalizer voltage stited on selectorswitch.

Malch wire color spl;ces al sensor

,CL-.-f

!c L-!

:, e

"~LI

'--'-'

~ c c

Model D25D300

7 WIRES

Brov/n

-Red

-Orange

-Shield Gnd (Yell

-Green

= Blue

-Violet or 9 WiRES

-Red

Brown

-Shield Gnd (Yell

-Gray

~ Green

Blue

-V,olel

~ or

Bro",ni

Red

Orange

Gry "nd Vlht

(for 9 vlir"" only)

Shield Gnd (Yel)

Green

[Jlue

Violet

,'-~,,-

'~-;;i~-~~..-':;;'

/)~

/'"7

See page 16

'oGol DG/u'2

Intrinsi(~l(y s~fe output termin~(s

I Transmitter I

I RFT9729 I

',',cro Mo:iOn mass flowmc!cr

sys:cm Conncc!;on lor in"insically sa!e ODCra'ion

For use """ '"oce's

DC ','" D3C-) ," ,ers'crs SuD"ti"c

"S c:"S'CJ"1 so"'

Figure 2-3

Wiring Diagram for the D600

Non Intrinsically

CN2 safe outputs

2d see terminal connection

2b on page 16

4bdz-,

6b zero-

8b zero+

10b 485A

12b 485B

14b mA-

16b mA+

18b DMS gnd

20b DMS temp

22b DMS period

24b Freq FIR-

26b FIR+

28b Freq+

3Ob Led+

32b Led-

Installation Instructions

Type Cenelec

Intrinsically safe outputs

CN1 8d

1Od

12d

14d

16d

18d

20d

22d

24d

26d drive- drive+ temp gnd temp- temp+

LPo-

LPO+

RPo-

RPO+ shield

-red

-brn

-yec

-or

-vioc

-whL

-grn

-grey

-blue

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Caution: power supply must agree with the voltage stated on selectorswitch.

Intrinsically output safe terminals

132

I Tr~nsmitter I

I RFT9729 I

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BACK VIEW RFT9729

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; red : earth p

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0,4 mm2

BACK VIEW RFT9729 h d,-,z

CN2

BACK VIEW

CN1

NOTES 1. CN1 IS USED FOR SENSOR CONNECTION, ONLY ON ROW "d" SEE IOM

CN2 IS USED FOR OUTPUT CONNECTION, ONLY ON ROW "b" SEE I.OM

2. FOR SUPPLY VOLTAGE CONNECTION 3 POSSIBILITIES a AC VOLTAGE DIRECTLY TO 3-POLE CONNECTOR OF AFT b AC VOLTAGE TO CN2 "P" TO 6z OR 2d

"N" TO 2b c DC VOLTAGE TO CN2 "+" TO 6z OR 2d

"-,, TO 2b

CN2

BACK VIEW

CN1

NOTES 1, CNI IS USED FOR SENSOR CONNECTION, ONLY ON ROW "d" SEE IOM

CN2 IS USED FOR OUTPUT CONNECTION, ONLY ON ROW "b" SEE IOM

2, FOR SUPPLY VOLTAGE CONNECTION 3 POSSIBILITIES a AC VOLTAGE DIRECTLY TO 3-POLE CONNECTOR OF RFT b AC VOLTAGE TO CN2 "P" TO 6z

"N" TO 2b

" " " TO 2z OR 4z OR 4b

RFT MUST BE WIRED AS '.

C DC VOLTAGE TO CN2 " + " TO 6z

"-" TO 2b

Table 2

RFT9729 to OMS Wiring

2.5.5 RS-485 Wiring

2.5.6 Multidrop Wiring for the Milliamp Output

RFT91729

Terminal #

18b to

2Ob to

22b to

18b to

DMS

Terminal

7 and 10

None

Signal

Description

Signal Ground

Temperature

Period

Ground shield

To connect the RFT9729 to an RS-485 network, use terminal 10b as the "A" line and terminal12b as the "8" line. RS-485 wiring should not exceed 4000 feet (1200 meters) of twisted pair cable. Cable should consist of 24 gauge or larger diameter wire. Twisted pair, shielded cabl~ should be used if the cable passes through any area which might produce electromagnetic interference.

A 120 ohm, V2 watt resistor should be installed at each end of the network cable. These termination resistors ensure proper communications by reducing electrical reflections in the cable. See Figure 2-4, RS-485 Wiring.

As many as 15 RFT9729 units can be connected to a single network. Using the RFT9729 in a networking (multidrop) mode requires each transmitter to be assigned a unique address in order to prevent contention on the line. In the RS-485 networking mode, it may be desirable to engage the "485 mA Live" jumper selection (see Section 3.1, Jumper

Configuration on the Processor Board) in order to preserve active milliamp outputs on each transmitter. For further information on the communications protocol requirements needed to implement an RS-485 network, refer to the Remote Flow Transmitter Digital

Communications Instruction Manual, July, 1 1989, PIN 1002789, or contact Micro Motion, Inc. at 1-8001322-JUMP, in the U.S. or at 31-08385-63312 in Europe.

To connect the RFT9729 in a HART compatible network, the milliamp outputs from each transmitter in the network need to be connected together feeding into a common load resistor of approximately 250 ohms. Before connecting each transmitter into the network, the transmitter must be assigned a unique multidrop address using the numbers 1 through 15. Doing this will default the milliamp output to a constant 4 mA level. The "485 mA Live" jumper (see Section 3.1) should not be engaged in this mode of operation to limit the overall current into the common load resistor.

A maximum of 10 transmitters may be connected in a HART multidrop network. Other

Rosemount SMART FAMILY transmitters may participate in a HART compatible network.

See Figure 2-5, HART Network Wiring. A single 268 or HART compatible control system can communicate with any of the transmitters in the network over the same two wire pair.

SCREW TERMINAL

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BACK VIEW RFT9729

NOTES 1. CNI IS USED FOR SENSOR CONNECTION, ONLY ON ROW "d" SEE I.OM

CN2 IS USED FOR OUTPUT CONNECTION, ONLY ON ROW "b" SEE I.OM

2, FOR SUPPLY VOLTAGE CONNECTION 3 POSSIBILITIES a AC VOLTAGE DIRECTLY TO 3-POLE CONNECTOR OF RFT b AC VOLTAGE TO CN2 "P" TO 6z OR 2d

"N" TO 2b

" + " TO 2z OR 4z OR 4b OR 4d

RFT MUST BE WIRED AS .

c DC VOLTAGE TO CN2 "+" TO 6z OR 2d

"-" TO 2b

CN2

BACK VIEW

NOTES 1" CN1 IS USED FOR SENSOR CONNECTION" ONLY ON ROW ""d"" SEE IOM

CN2 IS USED FOR OUTPUT CONNECTION, ONLY ON ROW "b" SEE IOM

2" FOR SUPPLY VOLTAGE CONNECTION 3 POSSIBILITIES a AC VOLTAGE DIRECTLY TO 3-POLE CONNECTOR OF RFT b AC VOLTAGE TO CN2 ""P"" TO 6z

"N"" TO 2b

" b " TO 2z OR 4z OR 4b

RFT MUST BE WIRED AS -.

c DC VOLTAGE TO CN2 "+" TO 6z

"-" TO 2b

Table 2

RFT9729 to DMS Wiring

2.5.5 RS.485 Wiring

RFT9729

Terminal

18b to

2Ob to

22b to

18b to

OMS

Terminal #

7 and 10

None

Signal

Description

Signal Ground

Temperature

Period

Ground shield

2.5.6 Multidrop Wiring for the Milliamp Output termination resistors ensure proper communications by reducing electrical reflections in the cable. See Figure 2-4, RS-485 Wiring.

Communications Instruction Manual, July, 1 1989, PIN 1002789, or contact Micro Motion, Inc. at 1-8001322-JUMP, in the U.S. or at 31-08385-63312 in Europe.

A maximum of 10 transmitters may be connected in a HART multidrop network. Other

Rosemount SMART FAMILY transmitters may participate in a HART compatible network.

See Figure 2-5, HART Network Wiring. A single 268 or HART compatible control system can communicate with any of the transmitters in the network over the same two wire pair.

Figure 2-4

RS-485 Wiring

One AFT and a host controller

Multiple AFT s and a host controller

2-5

N4

.

3.1 Jumper Configuration on the Processor Board

< ! >

Four user-selectable jumpers are used to configure the RFT9729. These jumpers are labeled DISABLE/ENABLE, SCALE DWN/UP, 485/268 and 485 mA Live. They are configured at the factory before shipping for ENABLE, SCALE DWN, 268, and with no jumper on 485 mA Live unless otherwise specified at the time of the sales order.

CAUTION: Power should be off when changing the position of jumpers.

To change the jumper settings, remove the sliding top cover to access the processor board (see Appendix I). Locate the jumpers and reconfigure according to application requirements (see Figures 3-1 and 3-2).

DISABLE/ENABLE {write protect): When this jumper is set to DISABLE, the RFT9729 will allow configuration changes to be made using the communications protocol. When the jumper is set to ENABLE, the RFT9729 will not allow configuration changes using the communications protocol. If this jumper is set to ENABLE, the error message shown below will be displayed when configuration changes with the 268 are attempted.

ERR-Xmtr Security 011

Proceed

SCALE DWN/UP: This jumper allows the user to establish the fault alarm (i.e., auto zero failure, sensor failure, electronics failure, or temperature sensor out of range) for the top or bottom of the current or frequency scale. When the jumper is set for UPSCALE and a fault condition occurs, the LED on the front panel flashes at 4 Hz, the frequency output goes to

11 ,520 Hz, and the milliamp output goes to 22 mA. When the jumper is set for

DOWNSCALE and a fault condition occurs, the LED on the front panel flashes at 4 Hz, the frequency output goes to 0 Hz, and the milliamp output goes to 2 mA.

485/268: This jumper allows you to configure the RFT9729 to communicate using either the RS-485 or the Bell 202 signaling standard. The 268 requires the Bell 202 signal standard. Therefore, when the 485 jumper setting is used, the 268 cannot be used to configure the transmitter. When using RS-485, terminals 10b and 12b are used for digital communications.

485 mA Live: When an RFT9729 is assigned a multidrop address other than 0, the milliamp output is automatically defaulted to a constant 4 mA level unless this jumper is engaged. This jumper should be used when several transmitters are in an RS-485 multidrop arrangement and the analog output is to remain live. If the multidrop RS-485 feature is not used, the jumper need not be engaged.

JUMPER ORIENTATION

Figure 3-2

Changing the

Jumper Settings

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3.2 Power

3.3 Transmitter Auto Zeroing

3.4 Using the LED

3.5 General Guidelines

After the meter has been correctly wired, the power supply voltage can be applied. Proper operation of the meter is indicated by the LED indicator on the front panel flashing on at 1

Hz.

Close the shut-off valve downstream of the sensor. The sensor should be completely filled with the process fluid.

Note: Fluid flow through the sensor must be completely stopped or the zero flow setting will be incorrect. Problems setting zero flow occasionally occur because of leakage through valves.

The transmitter can be zeroed three ways; 1) with the key switch on the front panel, 2) with a remote set zero switch (wired across terminals 6b and Bb of CN2) and, 3) with an auto zero command using the communications protocol. The LED in the terminal compartment turns on after 2 seconds of zero switch closure and remains on continuously while a zero flow calibration is in progress (see Section 3.6, Using the LED).

Zeroing normally takes about 30 seconds. The LED will again flash on at 1 Hz after the operation is complete. If auto zeroing fails, the LED will flash at 4 Hz signifying an error condition. An auto zero error condition could signify that excessive fluid is still flowing, the sensor tubes are not completely full, or that the sensor is improperly mounted. An auto zero error can be cleared by performing another auto zero after correcting the problem or by turning power off, then on again.

The LED is used to indicate 4 conditions.

1) The LED flashes on at 1 Hz during nominal operation (on 25% of the time, off 75% of the time).

2) The LED remains on continuously when a zero flow calibration (auto zero) is in progress.

3) The LED flashes on at 4 Hz if a fault condition occurs.

4) The LED blinks off at 1 Hz during a slug flow condition (on 75% of the time, off 25% of the time).

There are a number of general guidelines that should be followed when trouble-shooting a Micro Motion flowmeter. Before beginning the diagnostic process, become familiar with the Micro Motion Sensor Instruction Manual. This manual provides detailed installation information pertaining to the sensor.

If possible, leave the sensor in place when trying to trouble-shoot a problem. Problems are often a result of the specific environment in which the sensor operates.

Next, check all signals under both flow and no-flow conditions. This procedure helps ensure that causes or symptoms will not be overlooked.

22

3.5.1 Symptom Definitions

3.6 Trouble-shooting

Analog Output Test

Frequency Output Test

4 to 20 mA Output Trim

In order to effectively trouble-shoot a malfunctioning flowmeter, the symptoms of failure must be accurately identified. Once this is accomplished, their causes can be eliminated.

As previously stated, the problem should be specified in as much detail as possible.

Following are the four main symptoms found in the field and their definitions.

No Output: A "no output" condition exists when there is flow through the meter and no output is registered.

Unresponsive changes.

Output: The output remains constant even though the actual flow rate

Erratic Output: The output changes randomly, i.e., it is unrelated to changes in actual flow rate, it is erratic.

Intermittent Output: Intermittent output starts and stops randomly. While present, the output accurately reflects the flow rate.

The 268 is designed to assist the user in fault detection, diagnostics, and troubleshooting. The 268 displays messages which pertain to equipment problems or mistakes made in entering data. See the instruction manual entitled Using the SMART FAMILY

Interface 268 with the Micro Motion Remote Flow Transmitter, Section 5, Software

Diagnostics with the 268, for information on use of the 268 for fault detection and on diagnostics display messages.

Fault detection is designed to ensure the functional integrity of the sensor and the electronics, including the velocity transducers, drive coil, and resistance temperature device (RTD). Faults that do not manifest themselves in some obvious electrical form cannot be detected.

The RFT9729 runs continuous self-diagnostics. If these diagnostics reveal a failure, the

268 screen displays an error message. In addition, there are several tests that check or adjust the output circuitry of the transmitter.

When using the 268, the following test features are found under the test branch.

This test requires the transmitter to produce a desired current output. This output must be between 2 and 22 mA. See the instruction manual entitled Using the SMART FAMILY

Interface 268 with the Micro Motion Remote Flow Transmitter, Section 2.4.3, Loop Test.

This test requires the transmitter to produce a desired frequency output. This output must be between 1 and 10,000 Hz. See the instruction manual entitled Using the SMART

FAMILY Interface 268 with the Micro Motion Remote Flow Transmitter, Section 2.4.3,

Loop Test.

This feature allows adjustment of the analog output against a high accuracy external standard. See the instruction manual entitled Using the SMART FAMILY Interface 268 with the Micro Motion Remote Flow Transmitter, Section 3.9.1, 4 to 20 mA Trim.

22 3.5.1 Symptom Definitions

3.6 Trouble-shooting

Analog Output Test

Frequency Output Test

4 to 20 mA Output Trim

In order to effectively trouble-shoot a malfunctioning flowmeter, the symptoms of failure must be accurately identified. Once this is accomplished, their causes can be eliminated.

As previously stated, the problem should be specified in as much detail as possible.

Following are the four main symptoms found in the field and their definitions.

No Output: A "no output" condition exists when there is flow through the meter and no output is registered.

Unresponsive changes.

Output: The output remains constant even though the actual flow rate

Erratic Output: The output changes randomly, i.e., it is unrelated to changes in actual flow rate, it is erratic.

Intermittent Output: Intermittent output starts and stops randomly. While present, the output accurately reflects the flow rate.

The 268 is designed to assist the user in fault detection, diagnostics, and troubleshooting. The 268 displays messages which per1ain to equipment problems or mistakes made in entering data. See the instruction manual entitled Using the SMART FAMILY