Micro Motion Remote Flow Transmitter - Model RFT9729 Manuals & Guides

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
All Rights Reserved

Tables

Table 1
Table 2

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

Specifications AFT 9729 to OMS Wiring,

Mounting Dimensions 8

Back Panel Connections 10
Wiring Diagram for the D6 through D300 14
Wiring Diagram for the D600 15

RS-485 Wiring 17

HART Network Wiring 18

Location of Jumpers and Test Points on the Processor Board 20

Changing the Jumper Settings 20

3

16

Table of Contents

1

1.1

1.2

1.2:1

1.2.2

1.2.3

1.3

1.4

1.5

1.5.1

2

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

3

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

The Remote Flow Transmitter General Description Theory of Operation Communication Fault Detection and Diagnostics Meter Zeroing Independent Exchange of Flow Sensors and Transmitters.

Modular Electronics Display Totalizer Reset Button

Transmitter Installation 9
General 9
Installing the Transmitter 9
Power Connections 10
Signal Wiring; Sensor to the Transmitter 11
Cable Connections 11
Sensor Conduit Connections 12

Intrinsically Safe Wiring Requirements 12
Transmitter Output Wiring 12
Analog Output Wiring 12

Frequency Output Wiring 13

Flow Direction Wiring 13

DMS Wiring 13

RS-485 Wiring 16

Multidrop Wiring for the Milliamp Output 16

Start-Up 19
Jumper Configuration on the Processor Board 19

Power. 21
Transmitter Auto Zeroing 21

Using the LED 21

General Guidelines 21

Symptom Definitions 22

Trouble-shooting 22

Trouble-shooting the RFT 9729 23

Wiring 23

Internal Test Points 23

Customer Service 24

1
1
1
1
1
2
2
2
2
3

Appendix I
Appendix II
Appendix III

Exploded Drawing of the RFT9729 25
RFT9729 Configuration Record 26
Model 268 SMART FAMILY@ Interface Flow Diagram 28

The Remote Flow lrransmitter

1.1 General Description

1.2 Theory of Operation

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 pro-

duces 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.

1.2.1 Communication

1.2.2 Fault Detection and
Diagnostics

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.

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.

1.2.3 Meter Zeroing

1.3 Independent Exchange of
Flow Sensors and

Transmitters

1.4 Modular Electronics

1.5 Display

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).

2

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

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). Maxi-

mum 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 peak-

to-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:

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

-48-pin connector (24b) 4-20mA­(28b) 4-20mA+

-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.

4

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.OOO5 g/cc; OL 100, OL200, 0300, and 0600
:to.OO10 g/cc; 065, 0100 and 0150
:to.OO2 a g/cc; 040, 025, 01 ~, and 06

Temperature:

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.2°C

: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:

RFI Effect (sensor excluded)

Analog :to.O1 "Ct'C
Digital :to.10''Ct'C

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

6

Supply Voltage Effect (sensor included)

Physical Specifications

Meets supply voltage effect requirements of SAMA PMC 31

section 5.10.1 through

5.10.5

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

Figure 1.1
Mounting Dimensions

RFT9729

37 TE

(188 mm)

~ ~ RFT 9729 Remote Flow T"c,m,l!e,

~

6'

E
UJ E
I "
M aj

N

I~ ~~-~

0

(213 mm)

42 TE

FRONT

~

E

E
...
"'
~

SIDE

8

2

Transmitter Installation

2.1 General

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 posi-

tion 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 Mo-

tion 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.

2.2 Installing the Transmitter

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

Figure 2-1
Back Panel
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.

i 13TE

1!66MM>

-..

10

F: MAINS SELECTOR

w

230V

O,25A O ZER~

188 BI

2A O Mb

BACKPLANE BOARD RFT9729 = D
W.O96.B.443 REV 1 LED -

S.O97.B.203 REV 1 D

~

A

(S) ON

Dp

EARTH

ZERO +

MA+

~ D '-'NU I

LED +

BACK

H

~

~

("\
I I
I I

I I

J1

I I
I I

I I
I I
I I

I I
I I
I I

I I
I I

I I

A

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@1

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O
(/)
z

w
(/)

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.:1

U

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 insu-

lated 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.

11

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.

2.4.2 Sensor Conduit
Connections

2.4.3 Intrinsically Safe Wiring

Requirements

2.5 Transmitter Output Wiring

2.5.1 Analog Output Wiring

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).

12

2.5.2 Frequency Output Wiring
(Optionally replacable

by 2nd current output)

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).

2.5.3 Flow Direction Wiring

2.5.4 OMS Wiring

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.

13

Figure 2-2

Wiring Diagram for
the D6 through D300

Installation Instructions

Type Cenelec

Non Intrinsically safe outputs
CN2 2d see terminal connection

2b on page 16
2z

4bdzL

6b zero-

8b zero+
1Ob 485A
12b 4858
14b mA­16b mA+
18b DMS gnd

2Ob DMS temp
22b DMS period
24b Freq FIR­26b FIR+
28b Freq.+
3Ob Led+
32b Led-

d b

W'

*

32

/ Potential Equalizer

/

Caution: power supply must agree with the

voltage stited on selectorswitch.

Intrinsically safe outputs
CNc ad drive- -red

10d drive+ -brn
12d temp gnd -yel
14d temp- -or
16d temp+ -viol

18d LPO- -whc
20d LPO+ -grn
22d RPO- -grey
24d RPO+ -blue
2ad shield -shield

o

[8]

0=0

o

~

110/11SV ...

220/230V p N

p

N

Non-h.z.rdou. Art.

(~ution

d b

e>

.

I

-+

1 10 malnt~ln Intrlnsl(1

sale1 y, sale wlrin!,

must be separatec

2

Ifrom all other

wlrln(j

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

32

I Transmitter I
I RFT9729 I

14

Malch wire color

~ ov,;recOIOrw;lh , the 7 or 9 butl spl;ces

al sensor

,CL-.-f '--'-' c

!c L-! ~

:, "~LI c

e

Model D25D300

7 WIRES

Brov/n

-Red

-Orange

-Shield Gnd (Yell

-Green
= Blue

-Violet
or 9 WiRES

Brown

-Red

-Orange

-While -

-Shield Gnd (Yell

-Gray

~ Green

Blue

-V,olel

--

~ Bro",ni

*

See page 16

Red

or Gry "nd Vlht

Orange
(for 9 vlir"" only) 3

Shield Gnd (Yel)
Green
[Jlue
Violet

,'-~,,- /)~

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

'oGol DG/u'2

/

2

/'"7

',',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 safe outputs

CN2 2d see terminal connection

2b on page 16
2z
4bdz-,
6b zero-

8b zero+
10b 485A
12b 485B
14b mA­16b mA+
18b DMS gnd

20b DMS temp
22b DMS period
24b Freq FIR­26b FIR+
28b Freq+
3Ob Led+
32b Led-

[8]
0:0

Installation Instructions

Type Cenelec

Intrinsically safe outputs
CN1 8d drive- -red

1Od drive+ -brn
12d temp gnd -yec
14d temp- -or
16d temp+ -vioc

18d LPo- -whL
20d LPO+ -grn
22d RPo- -grey
24d RPO+ -blue
26d shield -shield

o
o

~

d b' z

Ciution

I To milntiln Intrinsic sitety. site ~iring I

2 must be sepirited

.~Irlno

Itrom ill other

I !J 32

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

CAUTION Power supply vollagc
musl agrcc w;th the vollagc stalcd
on Ihc vollagc labcl ;ns;dc Ihc
explos;on.proof hous;ng

100/115 VAC 50160 Hz G N H
220/230 VAC 60160 Hz G L2 L,

.to be sealed

afterw;r;ng

Power -~

,0

Voltage label -

/ Explosion-proof housing

110/115V I p I N I.

*

220/23~~j p I N I.

To d,;ve co;1
k)cated ;n
mass flow
meter Idr;ve
co;1 ;s

prool also)

~~~

Explo5;On-proof I lnlr;n5;cally sale

I Cablejunclion
I box

Potential Equalizer

(

/

r

E

ID

123456789

eeeee~eeee

0

Intrinsically safe
output terminals

I

132

I Tr~nsmitter I
I RFT9729 I

safe

{for 9 WIRE only)

I ~I

M"ro Mol;on mass Ilowmeter

sY"em connection lor

;n"ins"ally safe operation

e

Model DSOO

For use w;'h modo'

D600 ;n vers;ons suPp';od as

;nlr;ns;cally salel

explos;on proof

* See page 16

15

~

~

r-,--c -

P'N:...

L-:--L~-

J~I~g~ ~~earth

-~~I~ C)N

; ,

---

BACK VIEW RFT9729

FAST.ON I SOLDERING TERMINAL

ie-d ,-~p

04 mm2-J I .

d b z

J:~Q:~- --,"
; red :

:;f~!-*-i : -:~~~==~~
L-L-L-' J ; :

l-~~-=-:~-::'~ 0,4 mm2

BACK VIEW RFT9729

earth
p

N

d,-,z

h

~~

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 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

AFT MUST BE WIRED AS .
c DC VOLTAGE TO CN2 "+" TO 6z OR 2d

Table 2
RFT9729 to OMS Wiring

"N" TO 2b

"+"TO2zOR4zOR4bOR4d

"-,, TO 2b

RFT91729
Terminal #

18b to
2Ob to
22b to

18b to

2.5.5 RS-485 Wiring

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.

CN1

CN2

BACK VIEW

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

DMS

Terminal #

7 and 10
8
9

None

b AC VOLTAGE TO CN2 "P" TO 6z

RFT MUST BE WIRED AS '.
C DC VOLTAGE TO CN2 " + " TO 6z

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

"-" TO 2b

Signal
Description

Signal Ground
Temperature

Period
Ground shield

CN1

2.5.6 Multidrop Wiring for
the Milliamp Output

16

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 ad-

dress 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

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

RFT MUST BE WIRED AS .
c DC VOLTAGE TO CN2 "+" TO 6z OR 2d

Table 2
RFT9729 to DMS Wiring

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

"-" TO 2b

RFT9729
Terminal #

18b to
2Ob to
22b to
18b to

~ , !~~---;. p
ipiN!..: : -:-~~---; N

LC~~~~~-: :,-~:;j 0.4 mm2

OMS
Terminal #

7 and 10
8
9

None

y~~~~ ---", earth

BACK VIEW RFT9729

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

RFT MUST BE WIRED AS -.
c DC VOLTAGE TO CN2 "+" TO 6z

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

"-" TO 2b

~

CN2

Signal
Description

Signal Ground
Temperature

Period
Ground shield

2.5.5 RS.485 Wiring

2.5.6 Multidrop Wiring for
the Milliamp Output

16

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, 112 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.

Figure 2-4
RS-485 Wiring

One AFT and a
host controller

Multiple AFT s and a

host controller

17

2-5

N4

18

3

3.1 Jumper Configuration on
the Processor Board

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

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.

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

Pro-
ceed

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.

.

19

Figure 3-2
Changing the

Jumper Settings

JUMPER ORIENTATION

D

0

0

0

0

0

0 0

()--0-0-(è~~

0 Q~Q

, -J \

\ « \ ~

\ E 'CDQ.
I I ,

I I!) , « I ::>

ICX) IZ I

'V IUJ I

, UJ , Z

I O I

q

\ -J \ >

I CD , >

, « I O

I ~ , O

D 6

C') C\I
Q. Q.

-, -,

Q

\

\

, 00
, CD

I (\I

I

Q

,

\tn

I 00

I V

I

6

.-

0.
...,

20

~

3.2 Power

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.

3.3 Transmitter Auto Zeroing

~

3.4 Using the LED

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 continuous-

ly 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.

3.5 General Guidelines

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.

21

3.5.1 Symptom Definitions

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

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.

3.6 Trouble-shooting

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.

Analog Output Test 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.

Frequency Output Test

4 to 20 mA Output Trim

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

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

changes.

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.

3.6 Trouble-shooting The 268 is designed to assist the user in fault detection, diagnostics, and trouble-

shooting. The 268 displays messages which per1ain 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.

Analog Output Test 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.

Frequency Output Test

4 to 20 mA Output Trim

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

3.6.1 Trouble-shooting the
RFT9729

The RFT9729 is used in conjunction with a Micro Motion flow sensor to provide flow in-

formation. Therefore, many of the trouble-shooting checks pertain only to the sensor.
Other tests are performed with the 268.

3.6.1.1 Wiring

3.6.1.2 Internal Test Points

The RFT9729 can be used with 9-wire sensors with up to 1000 feet of cable or with 7-

wire sensors with up to 500 feet of cable. Terminals 12, 22, and 18 are internally con­nected. No jumpers are required. Refer to the Sensor Instruction Manual for detailed wir-

ing instructions.

Resistance checks are made by removing the terminal strip from the terminal block and
probing the corresponding terminals with the probes of a digital voltmeter. Wiring
problems are often incorrectly diagnosed as a faulty sensor. The following should always
be checked when the RFT9729 is first used:

1. Proper cable; use of shielded pairs.

2. Proper wire termination.
a. Wires on correct terminals.

b. Wires making good connections with terminal strip.

c. Wires making good connections at the sensor butt-splices or terminal strip.

d. Wi~es properly connected at any intermediate terminal junction.

OUtPIJt wiring should be checked for proper connection. A 250 ohm minimum, 1000 ohm
maximum load resistance must be present on the 4 to 20 mA output loop to enable com-

munic:ations with the 268.

The RFT9712 integrates the incoming position detector signal. The integrated signal can

be measured on test point 3TP1 for the left signal and 3TP2 for the right signal. The drive
control voltage may also be measured on test point 3TP4. See Table 1 for RFT9712
specifications. See Figure 3-1 for test point locations.

Test Points (negative side of 3C1 is the reference ground):

3TP1

3TP2

3TP4

POWE.r Supply (negative side of 3C1 is the reference ground):

3C1

11 VAG peak-to-peak (approximately 3.7 RMS). Frequency dependent upon
meter size and process fluid.

11 VAG peak-to-peak (approximately 3.7 RMS). Frequency dependent upon
meter size and process fluid.

0.6 to 9 VDC (normal operation). Greater than 10 VDC (saturation voltage).

5VDC

.

23

Terminal Signal Specifications
Terminals

CN1 8d to 10d
CN1 14d to 12d
CN1 20d to 12d

or

CN1 20dto 18d

CN1 24d to 12d

or

CN1 24d to 22d
CN1 16d to 12d
CN2 to N/2b

Drive signal; 1.2 to 20 volts peak-to-peak

Lead length compensator; 10 mVDC maximum

Left position detector; 300 mV peak-to-peak sine wave,

0.095
VAG RMS (150 mV peak-to-peak for 0600)

Right position detector; 300 mVAG peak-to-peak, 0.095

VAG

RMS (150 mV peak-to-peak for 0600)

Temperature sensor, 35 mVDC at o'C, +0.14 mVDCt C

Input line voltage (user supplied voltage only at DC
execution)

CN2 Bb to 6b
CN2 16b to 14b

Remote zero set (pull-up to 5 VDC)

4 to 20 mA output

CN228bto24b Frequencyoutput; 15 VDC peak-to-peak square wave

CN2 10b to 12b

RS-485 1/0, :!:5 V

CN2 2Ob to 18b Tube temperature output; 5 mVr'G
CN2 22bto 18b Tube period output; 2.5 VAG RMS
CN2 26b to 24b

Flow direction signal; 15 VDC w/fwd. and a VDC w/rev.

3.7 Customer Service

24

Note: Values are approximate.

~

The Micro Motion Customer Service Department can be reached at 1-800-522-MASS/
6277 (in Colorado or outside the U.S., call 303-530.8400). This "800" phone number can
be used for 24-hour emergency assistance, except in Colorado or outside the U.S.

Europe: The Micro Motion Service Department in Veenendaal, The Netherlands can be

reached at 31-08385-63911.

26

6eJ

JOSIJ~

/Jei\l

a6ue,.;

Ja!J!l

alea

V""'

--

\tIlJOi:

Appendix II

RFT9729 Configuration Record

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IF

7070 Winchester Circle. Boulder, Colorado 80301 .1-303/530-8400 .TLX 450034 MICRO MOT BLDR
Ordering and 24-hour service line' 1-800/522-6277 (MASS) .Application information and literature requests' 1-800/322-5867 (JUMP)
(in Colorado or outside the US, call 1-303/530-8400) .FAX [phone]

Europe' Groeneveldselaan 6, 3903 AZ, Veenendaal, The Netherlands, PH: 31-8385-63911, TLX: 37106, FAX [phone]

3.91 Rev. B

PIN 1002712

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