Detcon HRT Bridge User Manual

m

Detcon Model 700

HRT Bridge

Operator’s Installation and Instruction Manual

The Woodlands, Texas 77387

Ph.281.367.4100 | Fax [phone]

June 3, 2010 • Document #3468 • Revision 0.2

DETCON, Inc.

3200 Research Forest Dr.

www.detcon.co

HRT Bridge

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700 Sensor HRT Bridge IM ii

HRT Bridge

Table of Contents

1.0

Description................................................................................................................................................ 1

2.0 Installation................................................................................................................................................ 2

2.1 Installation of HRT Bridge PCA .......................................................................................................... 2

2.2 Connecting the HRT Bridge................................................................................................................. 2

3.0 Operation.................................................................................................................................................. 3

4.0 Operator Interface................................................................................................................................... 4

4.1 Device Menu........................................................................................................................................ 4

4.1.1 Primary Variables........................................................................................................................ 4

4.1.2 Identification................................................................................................................................5

4.2 Diagnostics Menu................................................................................................................................. 6

4.2.1 Device Status................................................................................................................................6

4.2.2 Sensor Status................................................................................................................................7

4.2.3 HART Status................................................................................................................................. 8

4.3 Device Setup Menu.............................................................................................................................. 8

4.3.1 Configuration Setup..................................................................................................................... 8

4.3.2 Calibration................................................................................................................................. 10

4.3.3 HART Setup................................................................................................................................14

5.0 Specifications.......................................................................................................................................... 16

6.0 Warranty................................................................................................................................................ 16

Appendix C....................................................................................................................................................... 17

Revision History............................................................................................................................................. 17

Table of Figures

Figure 1 HRT Bridge PCA................................................................................................................................1

Figure 2 HRT Bridge PCA................................................................................................................................2

Figure 3 Primary Variables ............................................................................................................................... 4

Figure 4 Identification.......................................................................................................................................6

Figure 6 Device Status Screen...........................................................................................................................7

Figure 7 FP Configuration Setup.......................................................................................................................9

Figure 8 FP Calibration Screen.........................................................................................................................10

Figure 9 DVM Connection................................................................................................................................13

Figure 10 HART Setup......................................................................................................................................14

700 Sensor HRT Bridge IM iii

HRT Bridge

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Shipping Address: 3200 A-1 Research Forest Dr., The Woodlands Texas 77381

Mailing Address: P.O. Box 8067, The Woodlands Texas 77387-8067

Phone: [phone] • Fax: 281.292.286 0 •

700 Sensor HRT Bridge IM iv

www.detcon.com • [e-mail]

HRT Bridge

1.0 Description

The HRT Bridge PCA is a bi-directional digital communication interface that provides data communication
between the Model 700 sensors and HART

®

-enabled devices. The HART® (Highway Addressable Remote
Transducer) Communication Protocol is a standard for sending and receiving digital information across analog
wires between smart devices and a control host or monitoring system. A host can be any software application
from a technician's hand-held device or laptop to a plant's process control, asset management, safety or other
system using any control platform.

The HART

Communication Protocol makes use of the Bell 202 Frequency Shift Keying (FSK) Standard to
superimpose digital communication signals on the 4-20mA signal utilized by the Model 700 sensors. This
enables two-way communication and makes it possible for additional information to be transferred to and from
the sensor.

Figure 1 HRT Bridge PCA

The HRT Bridge PCA communicates with the Model 700 sensors via its Modbus™ interface and transfers that
information to the HART
for a HART

Host System to communicate with the Model 700 sensor. This communication includes the

Communication Protocol along with the 4-20mA Signal. This provides the ability

ability for the Host to:

• Configure or re-configure the sensor

• Perform sensor diagnostics

• Troubleshoot the sensor

• Read additional information from the sensor

• Determine the sensor’s health and status

700 Sensor HRT Bridge IM Rev. 0.2 Page 1 of 18

HRT Bridge

2.0 Installation

The HRT Bridge PCA replaces the Transient Protection Assembly in the condulet the Model 700 sensor is
attached to. The condulet and the Model 700 sensor should be mounted as prescribed in the sensor’s manual.
For units that have been ordered with the HRT Bridge installed, the section on installing the HRT Bridge PCA
can be skipped.

2.1 Installation of HRT Bridge PCA

The HRT Bridge PCA replaces the Transient Protection Assembly (TPA) in the condulet attached to the
Model 700 sensor. The sensor is wired to the HRT Bridge PCA the same way as it is on the TPA so no re­wiring of the sensor connector is necessary.

HRT BRIDGE

mA/HART

GND
+24V

HART

REV2

SENSOR

HART

CFG

mA/HART
+24V

440-005132-000

Figure 2 HRT Bridge PCA

1. Remove the power/mA output connector from the TPA if power is applied.

2. Remove the connector from the Transient Protection PCA that connects to the 700 sensor.

3. Remove the hardware holding the Transient Protection PCA and remove the TPA from the condulet.

4. Install the HRT Bridge PCA in the condulet, using the same hardware used with the TPA.

5. Plug the sensor’s connector into J3 on the HRT Bridge PCA, labeled “SENSOR”.

6. Wire the power and 4-20mA output as described below.

2.2 Connecting the HRT Bridge

The HRT Bridge connection to the Host is a simple 3 wire connection of Power, Power Return, and mA.
Refer to Error! Reference source not found.. Connect the 24VDC to the connector at J4 pin-3 labeled 24V.
Connect the 24V Return to the connector at J4 pin 2 Labeled GND, and connect the 4-20mA to the connector
at J4 pin 1 labeled mA/HART. The 4-20mA signal from the HRT Bridge must be connected to a load resistor
to operate properly. If this signal is not terminated properly, the HRT Bridge, and the HART Interface will fail
to work properly.

If not already plugged in, plug the connector from the Model 700 sensor into the header J3, labeled
“SENSOR” on the HRT Bridge PCA.

The HART CFG Connector (J8) provides a connection for handheld devices such as the Emerson 375 Field
Communicator without having to remove power from the unit. The two pins of the HART CFG connector are
polarity independent and the two leads from the handheld configurator may be connected in any order.

700 Sensor HRT Bridge IM Rev.0.2 Page 2 of 18

HRT Bridge

3.0 Operation

When power is applied to the HRT Bridge PCA with the Model 700 sensor attached, the HRT Bridge will go
through a boot up sequence that will last for approximately 30 seconds. During this time, the 4-20mA line will
be held at 1mA. After the boot up sequence the HRT Bridge will enter normal operation, and communication
with the Host will begin. A red LED (D7) Labeled “HART” on the HRT Bridge PCA will illuminate when the
PCA is communicating with the HART Host.

The 4-20mA signal from the HRT Bridge must be connected to a load resistor for HART communication to
operate properly. If this signal is not terminated properly, the HRT Bridge, and the HART Interface will fail to
work. Normal termination for the 4-20mA signal is accomplished by connection to a Host device, which will
have the correct load to terminate the signal properly.

If the HRT Bridge senses a fault in the sensor, it will take the 4-20mA signal down to 1mA. This 1mA signal
will signify to the Host that a sensor fault has occurred, and the Host should, in turn, flag an error with the
associated sensor.

The HRT Bridge communicates with the Model 700 sensor through the Modbus™. The 4-20mA signal from
the 700 sensor should be connected to the HRT Bridge PCA even though it is not used. The HRT Bridge reads
the appropriate Modbus™ register and creates the 4-20mA signal from the register reading. This allows the
HRT Bridge complete control of the HART Communications. A red LED (D6) Labeled “MODBUS” will
blink when communication with the sensor occurs.

The HART interface has the ability to take the sensor into calibration. If the sensor is taken into calibration
via the HART interface, the HART Communication Protocol will inform the Host that the sensor is in
calibration mode, and will not set a fault. The 4-20mA signal will be set at 2mA. Starting a calibration using
the sensor interface and magnetic tool will also cause the 4-20mA to be set to 2mA.

700 Sensor HRT Bridge IM Rev. 0.2 Page 3 of 18

HRT Bridge

4.0 Operator Interface

The HRT Bridge PCA provides the ability to interface with the sensor via the HART Interface. The HART
interface Host can be a PC, a Laptop, or several handheld devices such as the Emerson 375 Field
Communicator. Although the displays on each device may be different and the menu names may change, the
information provided should be the same. The HART Interface consists of three basic Menus, each with a
subset of menus or screens:

Device Variables Menu
Primary Variables
Identification
Diagnostics Menu
Device Status
Sensor Status
Device Status Menu
Configuration Setup
Calibration
HART Setup

Note: The screen shots shown below are taken from the HART Communication Foundation
SDC625 Reference Host. The user’s screen appearance may be different depending on the HART
host used.

4.1 Device Menu

4.1.1 Primary Variables

The primary Variable Screen contains the basic information from the sensor and is broken into four basic
sections. None of these variables are changeable, and are directly read from the sensor.

Figure 3 Primary Variables

700 Sensor HRT Bridge IM Rev.0.2 Page 4 of 18

HRT Bridge

Primary Variables

• Concentration – the value of the gas concentration measured by the sensor. The units of measurement

(ppm, ppb, or %) are shown to the right of the concentration value. This is the HART primary
variable.

• Loop Current – the value of the output 4-20mA loop current

• PV %rnge – Primary variable percent of range

• EngUnits – the measurement units and gas type

Range Variables

• PV LRV – Primary variable lower range value (normally 0 for most sensors)

• PV URV – Primary variable upper range value, or the range of the sensor (i.e. 100ppm, 10ppm, 5%,

etc.)

Device Status

• Indicates the device has more status information available. If this icon is green, no additional status

information is available. If it is red, refer to Section 4.2 Diagnostics for more information.

Measured Values

• Concentration – the value of the gas concentration measured by the sensor. The units of measurement

(ppm, ppb, or %) are shown to the right of the concentration value

• Temperature – displayed in degrees Centigrade.

• PS Voltage – power supply voltage. Nominally 24VDC

PV – Graphic display

A graphic display of the sensor concentration reading may also be displayed in this screen. The graph will be a
graphic display of concentration verses time.

4.1.2 Identification

The Identification screen contains 4 sections that provide some basic HART information as well as some
additional sensor information. None of these variables are able to be changed in this screen, although some of
these variables may be changed elsewhere.

700 Sensor HRT Bridge IM Rev. 0.2 Page 5 of 18

HRT Bridge

Figure 4 Identification

HART Tags

• Tag – Text that is associated with the field device installation. This text can be used by the user in any

way. A recommended use is a unique label that correlates to a field device label: a plant drawing, or
on a control system. This variable is also used as a type of data link layer address handle.

• Long Tag – Functions exactly like the Tag except the size is larger (max 32 ISO Latin 1 characters).

Device Info.

• Manufacturer – Device manufacturer – “Detcon”

• Model – Device model – “700 Bridge”

• Dev id – Field Device Identification – Uniquely identifies the field device when combined with the

Manufacturer and Model. This variable cannot be modified by the user. Normally “1”.

Revisions

• Universal rev – Revision of the HART Communication Protocol (currently revision 7)

• Fld dev rev – Revision of the Field Device Specific Device Description

• Software rev – Revision of the software embedded in the HRT Bridge PCA

• Hardware rev – Revision of the hardware in the HRT Bridge PCA.

Sensor Information

• Processor Firmware Version – Version of the firmware currently loaded in the Model 700 sensor.

4.2 Diagnostics Menu

The Diagnostics Menu contains two screens; 1) Device Status and 2) Channel Status. Both screens consist of
a list of possible device error or status conditions. Next to each status condition is a small icon .that will be
either green to display the normal status, or red to indicate an abnormal, changed, or a malfunction condition.

4.2.1 Device Status

Device Status contains one screen that shows the status of the sensor and the HRT Bridge PCA. The left side
of the screen (Device Status) displays the status of the HRT Bridge PCA, with icons that will display either
green to indicate normal condition, or red to indicate an error, a change, or a malfunction.

700 Sensor HRT Bridge IM Rev.0.2 Page 6 of 18

HRT Bridge

Figure 5 Device Status Screen

• Field device has malfunctioned due to a hardware error or failure

• A reset or self test of the field device has occurred, or power has been removed and reapplied

• Field device has more status available

• PV analog channel fixed

• PV analog channel saturated

• Process applied to the non-primary variable is outside the operating limits of the field device

• Process applied to the primary variable is outside the operating limits of the field device

4.2.2 Sensor Status

The Sensor Status section of the screen shows the status of the Model 700 sensor. Icons are used to display the
status of the sensor and display either green to indicate normal condition or red to indicate an error, a change,
or a malfunction.

• Global Fault – The Model 700 sensor has one or more faults.

• Auto span fault – 180 days or more has elapsed since the last successful AutoSpan

• Temperature fault – the detector is currently reporting an ambient temperature that is outside of the –

40C to +75C range

• Loop current fault – The sensor has detected a condition where the 4-20mA output loop is not

functional

• Input voltage fault – The sensor is currently receiving an input voltage that is outside of the 11.5-

28VDC range

• Memory fault – The detector has a failure in saving new data to memory

• Processor fault – The detector has an unrecoverable run-time error

• Clearing Fault – The sensor reading failed to clear after removal of span gas during an AutoSpan

sequence

• Stability Fault – The sensor reading failed to attain a stable reading when span gas was applied during

an AutoSpan sequence

• Range Fault – Sensor fails the minimum signal change criteria during an AutoSpan sequence

700 Sensor HRT Bridge IM Rev. 0.2 Page 7 of 18

HRT Bridge

• Sensor fault – The sensor cell has failed

• Zero Fault – the sensor drifts below –10% of full range

• Sensor Fault 2 – heater fault (TP-700), bridge fault (FP-700), or missing cell (DM-700). This status is

not used by the IR-700 or PI-700.

• Sensor in Calibration – The sensor is currently being calibrated

4.2.3 HART Status

The HART status section of the screen shows the status of the HART interface on the HRT Bridge PCA.
Icons next to each error description indicate if an error has occurred. A green icon indicates the error condition
is not present and a red icon indicates an error has occurred.

• Unique ID Not Set – The unique device ID for the HRT Bridge PCA has not been set. This ID is set at

the Detcon factory prior to shipping. If this error occurs, please contact Detcon technical support.

• DAC Zero Not Calibrated – The 4mA output of the HRT Bridge PCA has not been calibrated. Please

see Section 4.3.2.2 for calibration instructions

• DAC Span Not Calibrated – The 20mA output of the HRT Bridge PCA has not been calibrated. Please

see Section 4.3.2.2 for calibration instructions

• Modbus Communications Lost – The Model 700 sensor has failed to respond to more than 3 Modbus

poll requests. This error condition can be reset using the “Reset Comm Lost Status” button that
appears when this error condition occurs

4.3 Device Setup Menu

The Device Status Menu consists of three sub menus that allow parameters within the HRT Bridge PCA, and
within the sensor to be changed or modified, and allows calibration of the sensor.

4.3.1 Configuration Setup

The Configuration Screen displays the configuration of the Model 700 sensor. There are no fields that can be
changed on this screen, these fields are read directly from the Model 700 sensor.

700 Sensor HRT Bridge IM Rev.0.2 Page 8 of 18

HRT Bridge

Figure 6 FP Configuration Setup

This screen will vary depending on the type of Model 700 sensor attached to the HRT Bridge. The Range Set
up will display the Model Type of the sensor, followed by the PV LRV (Primary Variable Lower Range
Value) and the PV URV (Primary Variable Upper Range Value), and the Conc Units (Concentration Units),
the display may also show the Sensor Range. The Sensor Setup portion of the screen will display sensor
specific parameters:

DM

• Sensor Range

• Cell Bias

• Gain Code

• Raw Counts

• Sensor Life

FP

• Gas Factor

• Cal Factor

• Bridge Current

• Bridge Voltage

• Sensor Life

IR

• Gas Factor

• Active Counts

• Reference Counts

• Range Multiplier

• Sensor Life

PI

• Sensor Range

• Gain Code

• Raw Counts

• Zero Offset

• Sensor Life

700 Sensor HRT Bridge IM Rev. 0.2 Page 9 of 18

HRT Bridge

TP

• Heater Power

• Heater Voltage

• Sensor Resistance

• Heater Current

• Sensor Life

Note: The values above are read when the HRT Bridge boots up and are not updated in real-time.

4.3.2 Calibration

The Calibration screen displays the days since the last calibration, and the auto span level. This screen also
allows the user to calibrate the sensor by performing an Auto Zero Calibration and an Auto Span Calibration.
Calibration of the sensor using this feature also notifies the Host that the sensor is in calibration mode.

Figure 7 FP Calibration Screen

4.3.2.1 Sensor Calibration using the HRT Bridge

Calibration of a sensor using the HRT Bridge follows the same principle as calibrating the sensor via the
magnetic interface. Since most of the calibration information can be found in the associated sensors manual, it
is important to have the sensor manual on hand when performing sensor calibration.

Each sensor type has different criteria that need to be met before calibration of the sensor should be performed.
Refer to the appropriate sensor manual for specific information on gas to be used, flow rates, interference gas,
cross calibration gas, and other sensor specific criteria.

NOTE: The TP sensor does not perform an Auto Zero function. Although the menu may provide this
option, the test is invalid, and is not performed.

Auto Zero

700 Sensor HRT Bridge IM Rev.0.2 Page 10 of 18

HRT Bridge

Auto Zero function is used to zero the sensor. Local ambient air can be used to zero most sensors as long as
there are no traces of target or interference gases. If this cannot be confirmed, then a zero air or N
used. N

must be used for zero calibration of O2 deficiency sensors.

2

should be

2

Material Requirements:

• Handheld Communicator or PC and interface for HRT Bridge.

• Detcon PN 613-120000-700 Model 700 Splash Guard with integral Cal Port. -OR-

Detcon PN 943-000006-132 Threaded Calibration Adapter

• Detcon PN 942-001123-000 Zero Air cal gas (or use ambient air if no target gas is present).

• Detcon P/N 942-640023-100 Nitrogen 99.99%

NOTE: Refer to appropriate sensor manual for the specific information on zero gas.
For DM, IR, and PI sensors, the zero gas source may be zero air or N
O

deficiency sensors.

2

For FP sensors, zero air should be used. Zero Air should have a normal background of 20.89% O
Nitrogen (N

) should not be used or errors may result.

2

, but must be pure N2 (99.99%) for

2

. Pure

2

Auto Zero consists of entering “Autozero Cal” and following the menu-displayed instructions.

1. If applicable install the Calibration Adapter or Splash Guard Adapter with integral Cal Port.

2. If applicable connect zero gas to the cal port.

3. Select “Autozero Cal” from the Sensor Calibration section of the screen.

4. Upon entering Auto Zero Calibration the procedure will prompt to begin Auto Zero Calibration. If zero

gas is to be applied to the sensor, apply the gas.

NOTE: Upon entering calibration the 4-20mA signal drops to 2mA and is held at this level until the
program returns to normal operation.

5. The procedure will prompt to verify that no gas is present, and the sensor will perform Auto Zero.

NOTE: The sensor will scroll “Zero Cal . . . Setting Zero . . . Zero Saved” twice.

6. After successfully setting Zero Cal the sensor and the HART Interface will return to Automatic Mode.

7. Remove the zero gas and calibration adapter if applicable.

Auto Span

The Auto Span function is used to calibrate the sensor. Unless otherwise specified by the associated sensor
manual, span calibration is recommended at 50% of range.

Material Requirements:

• Handheld Communicator or PC and interface for HRT Bridge.

• Detcon PN 613-120000-700 Model 700 Splash Guard with integral Cal Port. -OR-

Detcon PN 943-000006-132 Threaded Calibration Adapter

• Detcon Span Gas (See Detcon for Ordering Information). Recommended span gas is 50% of range with

target gas. Other suitable span gas sources containing the target gas in air or N
acceptable.

NOTE: Refer to the appropriate sensor manual for information regarding Span Gas, flow rates, cross
interference, or other sensor specific criteria.

Auto Span consists of entering “Autospan Cal” and following the display. The procedure will ask for the
application of span gas. The applied gas concentration must be equal to the Autospan gas level setting. The

700 Sensor HRT Bridge IM Rev. 0.2 Page 11 of 18

balance may be

2

HRT Bridge

factory default setting and recommendation for span gas concentration is normally 50% of range. If a span gas
containing the recommended concentration is not available, other concentrations may be used as long as they
fall between 5% and 100% of range. However, any alternate span gas concentration value must be set in the
“Auto Span Level” field before proceeding with “Autospan cal”.

CAUTION:

Verification that the calibration gas level setting matches the calibration span gas
concentration is required before executing “Autospan Cal”. These two numbers must be equal. Refer
to the appropriate sensor manual for more information.

1. If applicable install the Calibration Adapter or Splash Guard Adapter with integral Cal Port.

2. Verify that the Auto Span Level is equal to the calibration span gas concentration. If the Auto Span Level

is not equal to the Calibration span gas concentration, adjust the Auto Span Level.

3. Connect the Cal Gas to the sensor, but do not apply the gas.

4. Select “Autospan Cal” from the Sensor Calibration section of the screen.

NOTE: Upon entering calibration the 4-20mA signal drops to 2mA and is held at this level until the
program returns to normal operation.

5. Upon entering the procedure the procedure will prompt to begin Auto Span Calibration.

6. The procedure will prompt to apply span gas. Apply span gas from the attached cal gas cylinder and

respond to the prompt.

NOTE: The sensor reading will respond to the gas and will switch to displaying a flashing “XX”.

NOTE: Assuming acceptable sensor signal change, after 1 minute the reading will auto-adjust to the

programmed Auto Span level. During the next 30 seconds, the Auto Span sequence checks the sensor for
acceptable reading stability. If the sensor fails the stability check, the reading is re-adjusted back to the
Auto Span level and the cycle repeats until the stability check is passed. Up to three additional 30-second
stability check periods are allowed before the unit reports a “Stability Fault” twice and the sensor will
return to normal operation, aborting the Auto Span sequence. The sensor will continue to report a
“Stability Fault” and will not clear the fault until a successful Auto Span is completed.

NOTE: If the sensor passes the stability check, the sensor reports a series of messages:
“Span OK”
“Sensor Life XXX%”
“Remove Span Gas”

NOTE: When calibrating O2 deficiency sensors, there is no requirement to clear to <5% of range. The

sensor will return to normal operation immediately after span adjustment.

7. When the sensor passes calibration the procedure will prompt to remove the span gas. Unsuccessful

completion of the span calibration will create a Global Fault, and “Autospan Cal” will be aborted with a
change to the HART Sensor Status (refer to section 4.2.2 Sensor Status).

8. After successfully setting span cal the sensor and the HART Interface will return to Automatic Mode.

9. The Auto Span Calibration is complete

10. Remove the cal gas and calibration adapter if applicable.

NOTE 1: If the sensor fails the minimum signal change criteria, a “Range Fault” will be declared and a

“Fault Detected” message will be displayed alternately on the sensor with the current reading. The

HART Sensor Status will change to reflect a Range Fault.

700 Sensor HRT Bridge IM Rev.0.2 Page 12 of 18

HRT Bridge

NOTE 2: If the sensor fails the stability criteria, a “Stability Fault” will be declared and a “Fault
Detected” message will be displayed alternately on the sensor with the current reading. The HART

Sensor Status will change to reflect a Sensor Fault.

NOTE 3: If the sensor fails the clearing time criteria, a “Clearing Fault” will be declared and a “Fault
Detected” message will be displayed alternately on the sensor with the current reading. The HART

Sensor Status will change to reflect a Clearing Fault.

4.3.2.2 Loop Test Calibrate

The Calibration Screen contains a Loop Test Calibration section. This section displays the loop current
reading and allows the user to perform D/A trim and Loop Test. D/A trim is used to calibrate the 4mA and
20mA set points in the Digital/Analog converter. Loop test allows the user to set the mA output to any level
within range; this can be a good troubleshooting tool for line degradation. A DVM capable of reading
milliamps and a 100~250 Ohm resistor are required to perform D/A trim and/or Loop test.

HRT Bridge PCA

HRT BRIDGE

HART

CFG

mA/HART
+24V

mA/HART

GND
+24V

HART

100~250 Ohm Resistor

HART

Connector

DVM +mA
DVM GND

GND (- 24V)
+ 24V

SENSOR

HART

Header

Figure 8 DVM Connection

D/A Trim

1) Select “D/A trim” from the Loop test Calibrate section of the screen.

2) The procedure will prompt to connect a meter: (Refer to Figure 8.)
a) Disconnect the wire from the HART Connectors mA/HART position.
b) Connect one end of a 100~250Ohm resistor to the mA/HART position of the HART Connector.
c) Connect the positive lead of a DVM set to measure milliamps to the other end of the resistor.
d) Connect the negative lead (-) of the DVM to the GND position of the connector.

3) The procedure will set the output to 4ma, and prompt for the DVM Reading. Input the reading and select
“OK”.

4) The HRT Bridge will readjust the output for 4mA, and inquire if the reading is 4mA on the DVM (select
“YES” or “NO”).

5) If the reading on the DVM is 4mA, select “YES” and “OK” and the HRT Bridge will continue on to
20mA. If the reading is not 4mA, select “NO” and “OK” and the procedure will re-run the 4mA
calibration (Step 3).

6) The procedure will set the output to 20mA, and prompt for the DVM Reading. Input the reading and
select “OK”.

7) The HRT Bridge will readjust the output for 20mA, and inquire if the reading is 20mA on the DVM
(select “YES” or “NO”).

8) If the reading on the DVM is 20mA, Select “YES” and “OK”. If the reading is not 20mA, select “NO”
and “OK” and the procedure will re-run the 20mA calibration (Step 6).

700 Sensor HRT Bridge IM Rev. 0.2 Page 13 of 18

HRT Bridge

9) When both the 4mA and the 20mA have been calibrated the procedure will return the HRT Bridge to

automatic control.

Loop Test

1) Ensure that the DVM is connected as prescribed in Figure 8:
a) Disconnect the wire from the HART Connectors mA/HART position.
b) Connect one end of a 100~250Ohm resistor to the mA/HART position of the HART Connector.
c) Connect the positive lead of a DVM set to measure milliamps to the other end of the resistor.
d) Connect the negative lead (-) of the DVM to the GND position of the connector. (Figure 8)

2) Select “Loop test” from the Loop test Calibrate section of the screen.

3) The procedure will prompt for a setting (“4mA”, “20mA”, “Other”, and “End”).

4) Select one of the settings or “End” to exit.

5) If “Other” is selected, the procedure will prompt for a value. Only valid values will be accepted.

6) Select “OK”.

7) The HRT Bridge will set the output for selected milliamp value.

8) Compare the reading on the DVM to the output displayed. Select “OK” when ready to continue

9) The procedure will return to Step 3. If “End” is selected, the HRT Bridge will exit Loop test and return to
automatic control.

4.3.3 HART Setup

The HART Setup Screen allows parameters of the HRT Bridge to be changed or modified. Changes made on
this screen will not be applied until power is cycled on the unit.

Figure 9 HART Setup

• Tag – Text that is associated with the field device installation. This text can be used by the user in any

way. A recommended use is a unique label that correlates to a field device label: a plant drawing, or on
a control system. This variable is also used as a type of data link layer address handle.

• Long Tag – Functions exactly like the Tag except the size is larger (max 32 ISO Latin 1 characters).

• Descriptor – Text that is associated with the field device. This text can be used by the user in any way.

There is no specific recommended use.

700 Sensor HRT Bridge IM Rev.0.2 Page 14 of 18

HRT Bridge

• Message – Text that is associated with the field device. This text can be used by the user in any way.

There is no specific recommended use.

• Date – Gregorian calendar date that is stored in the field device. This can be used by the user in any

way. There is no specific recommended use. Note: This field is not updated by the HRT Bridge and
does not indicate the current date.

• Final asmbly num – Number that is used for identification purposes, and is associated with the overall

field device.

• Poll addr – This number is the address of the HRT Bridge on a network and must be set to 0.

700 Sensor HRT Bridge IM Rev. 0.2 Page 15 of 18

HRT Bridge

5.0 Specifications

Input Power

9 to 30VDC (Nominal 24VDC)

Power Consumption (per channel)

100mA Maximum (Including Sensor)
3W Maximum (Including Sensor)

Operating Temperature

–40°C to +85°C
Humidity: 10 to 95% Non-condensing

Outputs

Analog 4-20mA DC
HART

HART

7.0

Manufacturer ID

0x6007

Device ID

0xE08B

Warranty

One year
Five year fixed fee service policy

®

Communication Protocol

®

Version

6.0 Warranty

All warranties are FOB the Detcon factory. Should any product fail to perform in accordance with published
specifications within the warranty period, return it freight pre-paid to Detcon Inc., 3200 Research Forest Drive
Suite A-1, The Woodlands, Texas 77381 for necessary repairs.

Detcon Inc., as manufacturer, warrants each new HRT Bridge PCA to be free from defects in material and
workmanship under intended normal use for a period of one year. The warranty period begins on the date of
shipment to the original purchaser and ends one year thereafter.

700 Sensor HRT Bridge IM Rev.0.2 Page 16 of 18

HRT Bridge

Appendix C

Revision History

Revision Date Changes made Approval

0.0 02/16/10 Original Release. LU

0.1 04/09/10 Add Approval block to Revision History LU

0.2 06/03/10 Change product name to Model 700 HRT Bridge LU

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HRT Bridge

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Shipping Address: 3200 A-1 Research Forest Dr., The Woodlands Texas 77381

Mailing Address: P.O. Box 8067, The Woodlands Texas 77387-8067

Phone: [phone] • Fax: 281.292.286 0 •

700 Sensor HRT Bridge IM Rev.0.2 Page 18 of 18

www.detcon.com • [e-mail]