MI 020-460
Instruction
RTT20
I/A Series® Temperature Transmitter
Operation, Configuration, and Calibration
Using a HART Communicator
October 1996
MI 020-460 – October 1996
Contents
General Description ............................................................................................................ 1
Reference Documents ......................................................................................................... 1
Top Level Menu Overview .................................................................................................. 1
Connecting the Communicator to the Transmitter ............................................................. 2
Communicator Keyboard and Display ................................................................................ 2
Online Configuration Flowcharts ........................................................................................ 4
Explanation of Parameters ................................................................................................... 7
Trimming 4-20 mA Output ................................................................................................ 8
Custom Curve Calibration .................................................................................................. 9
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MI 020-460 – October 1996
iv
Contents
Introduction
General Description
The RTT20-T Temperature Transmitter with HART communications may be configured,
operated, and calibrated using the HART Model 275 Communicator (Foxboro Model
HT991).
The HART Communicator is used in two environments: Offline (not connected to a transmitter) and Online (connected to a transmitter). The Main menu (shown in Figure 1) is displayed when not connected to a transmitter. The Online Menu (shown in Figure 2) is
displayed when connected to a transmitter.
Reference Documents
This document contains information on configuration, calibration, and operation of the
RTT20-T Temperature Transmitter using a HART Communicator. Additional information
about the transmitter and the communicator is contained in the following documents:
♦
♦
MI 020-453: RTT20 I/A Series Temperature Transmitter, Installation, Configuration,
Operation, Calibration, and Maintenance.
MAN 4250: HART Communicator Product Manual
(Booklet supplied with the communicator).
Top Level Menu Overview
Figure 1 shows the Main menu structure of the HART Communicator. Figure 2 shows the
top level Online menu for the RTT20-T Transmitter.
1. Offline
Compile set of configuration data for later downloading to a transmitter or
Simulate an Online connection to a transmitter without connecting to it.
2. Online
Configure, Calibrate, or Operate an Online transmitter.
3. Transfer
Transfer configuration data from a transmitter to the communicator or
vice versa.
4. Frequency Device
Display the frequency output and Pressure output of current to pressure
devices.
5. Utility
Set auto polling and adjust contrast of communicator LCD.
Figure 1. HART Communicator Main Menu
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MI 020-460 – October 1996
Introduction
Online
Display Transmitter Data
1. Display Data
Measured Value in EGU
Output Value in mA
2. Diagnostics
3. Device Data
PV
PV AOut
Lower Range Value
LRV
Upper Range Value
URV
Meas. in % of Range
PV%
Read Device Status
1. Device Status
Perform Internal Test Routine
Use Transmitter as a mA Cal Source
2. Testroutines
3. Simulation
1. Maintenance
Set Damping (0 - 10 seconds)
1. Damping
Perform Rerange
2. Measuring Range
Set Failsafe Parameters
3. Show Failure Handl
2. Specialist
Configure Transmitter Tag Data and Date
1. Measuring Point
Configure Sensor Parameters
2. Config Sensor
Perform Rerange, Calib; Set Damping
Set Sensor Fault Detect On/Off
3. Config Output
4. Failure Handling
Trim 4-20 mA Output
Configure Other Parameters
5. Cal 4-20 mA
Configure Transmitter Information
7. Transmitter Info
6. Options
Figure 2. RTT20 Temperature Transmitter Top Level Online Menu
Connecting the Communicator to the Transmitter
Connect the communicator to the transmitter as shown in MI 020-453, supplied with the
transmitter, and in MAN 4250, supplied with the communicator.
Communicator Keyboard and Display
Refer to MAN 4250 supplied with the communicator.
2
Operation
MI 020-460 – October 1996
Operation
To display the measurement (Process Variable or PV) on the Communicator, select 2. Online
from the Main menu. Then select 1. Display Data from the Online menu. The display will
show:
PV
The measured value in engineering units.
PV AOut
The output value in mA.
LRV
The lower range value.
URV
The upper range value.
PV%
The measured value in percent of range.
Configuration
The most common practice is to configure your RTT20 Transmitter online. However, in
some cases, you may wish to configure one set of data offline in your communicator and then
download it to any number of RTT20 transmitters. Even though the configuration flowchart
is presented in a different order for offline configuration than for online configuration, the
procedure is similar to that explained below.
To configure your online transmitter with the Communicator:
1.
Select 2. Online from the Main menu.
2.
Select 3. Device Data from the Online menu.
3.
Select 2. Specialist from the next menu.
4.
Follow Figure 3 and Figure 4 to access and set/change various parameters. See
text in this section for an explanation of each parameter.
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MI 020-460 – October 1996
Configuration
Online Configuration Flowcharts
Specialist
1. Measuring Point
1. Tag
2. Descriptor
3. Date
2. Config Sensor
1. Sensor Connection
Pt100 DIN IEC
Pt100 SAMA
Ni100 DIN
SAMA Ni
Cr 228/229
MINCO Ni120
T/C typ B
T/C typ C
T/C typ E
T/C typ J
T/C typ K
T/C typ DIN L
T/C typ N
T/C typ R
T/C typ S
T/C typ T
T/C typ DIN U
ohm
mV
RTD Special
T/C Special
Lin with PV unit
Lin with dewpoint
millivolts
Thermocouple
T/C differential
2 Wire
3 Wire
4 Wire
Dual 2W RTD diff
Dual 2W independ
Dual 2W secure
Dual 2W average
Continued on Figure 4
Figure 3. Online Configuration Flowchart
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Configuration
MI 020-460 – October 1996
Continued from Figure 3
2. PV Unit
3. Display Label
4. Cold Junc Comp
ohm
mV
degC
degF
degR
Kelvin
Without CJ
Fixed CJ Temp
Internal CJ Temp
External via Ni100
5. Characterization
3. Config Output
1. Measuring Range
1. Input
LRV
URV
2. Damping
2. Apply
LRV
URV
4. Failure Handling
On
Off
5. Cal 4-20 mA
Continued on Figure 5
Figure 4. Online Configuration Flowchart (Continued)
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MI 020-460 – October 1996
Configuration
Continued from Figure 4
1. Filtering
6. Options
1. Line Freq & Filter
50 Hz, High Filter
50 Hz, High Speed
60 Hz, High Filter
60 Hz, High Speed
2. Smart Smoothing
3. Validation time
2. Clear Hist Status
On
Off
3. Local Display
Display PV
1. Display Config
Display % of Range
Display AOut in mA
Alternate PV/AOut
Alternate PV/%
2. Display Type
4. Local Keys
Enable
Disable
5. Internal Temp Unit
degC
degF
6. HART
1. Poll Addr
2. Burst mode
On
Off
3. Burst option
Pv
% range/current
7. Transmitter Info
Process vars/crnt
1. Message
2. Xmtr Assembly
Basic Unit
DIN Rail Mtd
Head Housing
EEX-d Housing
Customized
Special
3. Device Info
1. Mfgr id
2. Dev id
3. Final Assy Nr
4. Hardware Rev
5. Software Rev
6. Universal Rev
Figure 5. Online Configuration Flowchart (Continued)
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Configuration
MI 020-460 – October 1996
Explanation of Parameters
Measuring Point
Tag
Description
Date
Normally configured to the plant tag number. The Tag Number is the primary identifier when communicating with a transmitter using the HART
Communicator.
Normally configured as the Tag Name.
The date entered in the form mm/dd/yy.
Config Sensor
Sensor Conn
PV Unit
Display Label
Cold Junc Comp
Characterization
The input: type of thermocouple, type of RTD, mV, or ohm.
The process variable (ohm, mV, degC, degF, degR, Kelvin).
The label on the third line of the optional display. Seven characters maximum.
Cold Junction Compensation is used with a thermocouple input only.
Specify Without CJ, Fixed CJ Temp, Internal CJ Temp, or External via
Ni100.
For a calibration, specify the number of points on the curve between 2
and 22. Then specify their coordinates.
Config Output
Measuring
Range
Damping
Specify Input to rerange the transmitter without calibration equipment or
Apply to perform a calibration. Then specify the lower and upper range
value (LRV and URV).
Damping may be specified between 0 and 30 seconds. Foxboro recommends increasing the Smoothing and/or Validation time before increasing
the damping value.
Failure Handling
Specify the Sensor Fault Detection feature as On or Off.
Cal 4-20 mA
Trim the 4 and 20 mA Output by connecting a digital voltmeter and precision resistor in the
output loop (see MI 020-453) and adjusting the output with this configuration parameter.
This procedure should be performed only if the actual current value in the loop as measured
by an accurate milliammeter does not agree with the mA value being displayed on the HART
Communicator or the integral indicator (-L1 or -L3 option). This procedure should only be
done after recalibrating the transmitter using accurate equipment.
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MI 020-460 – October 1996
Calibration
Options
Filtering
Clear Historical
Status
Local Display
Local Keys
Int Temp Unit
HART
Line Freq & Filter: Specify the ac frequency of the power supply (50 or
60 Hz) and the ability to help eliminate noise from the power supply. Set
to High Filter unless you require extremely fast response with damping set
for 0 seconds. In that case only, set to High Speed.
Smart Smoothing: Process or electrical noise is minimized by a digital filtering algorithm and is smoothed by averaging the input over an adjustable time period. Specify the time period from 0 to 30 seconds.
Validation Time: Specify the lag time that the microprocessor holds and
compares the input to past inputs. This is adjustable from 0 to 10 seconds.
Specify Yes or No.
Display Config: Specify the reading on the transmitter optional local display as Display PV, Display % of Range, Display AOut in mA, Alternate
PV/AOut, and Alternate PV/%.
Display Type: Indicates type (one line or three line) of local display (if
any) that is attached to transmitter.
Allows you to Enable or Disable keys on the optional local indicator.
Cold junction compensation units. Specify C or F.
Poll Addr: Address of 0 allows the transmitter to operate in the standard
point to point, two-wire 4-20 mA mode. If transmitter is to be multidrop
wired, specify an address from 1 to 15.
Burst Mode: Burst cannot be used with multidrop wiring. Therefore,
specify Off unless the Poll Address is set to 0.
Burst Option: Select PV, % range/current, or vars/crnt.
Calibration
The RTT20 Transmitter has an advanced self-calibration routine that greatly extends the time
between recalibrations. Every three seconds, the transmitter checks the zero and full scale output against highly accurate and stable internal voltage signals that are referenced back to the
factory calibration stored in nonvolatile EEPROM memory. Any adjustments are made automatically without interrupting the output signal.
Trimming 4-20 mA Output
If you have a 4-20 mA output, you may trim the output at 4 mA and 20 mA by connecting a
digital voltmeter and precision resister in the output loop (see MI 020-453) and adjusting the
output with the Communicator. See Cal 4-20 mA in previous section.
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Calibration
MI 020-460 – October 1996
Custom Curve Calibration
Your transmitter may be calibrated to a standard or custom curve using the Communicator.
See Characterization in previous section and follow prompts on Communicator display.
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MI 020-460 – October 1996
Calibration
.
ISSUE DATES
OCT 1996
Vertical lines to right of text or illustrations indicate areas changed at last issue date.
The Foxboro Company
33 Commercial Street
Foxboro, MA 02035-2099
United States of America
http://www.foxboro.com
Inside U.S.: 1-888-FOXBORO
(1-888-369-2676)
Outside U.S.: Contact your
local Foxboro Representative.
Facsimile: (508) 549-4992
Foxboro and I/A Series are registered trademarks of The Foxboro Company.
Siebe is a registered trademark of Siebe, plc.
HART is a trademark of the HART Communication Foundation.
A Siebe Group Company
MB 100
Copyright 1996 by The Foxboro Company
All rights reserved
Printed in U.S.A
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