|
| |
 |
 |
| SEM310
IN-HEAD |
SEM315 DIN
RAIL MOUNT |
|
HART TEMPERATURE
TRANSMITTERS
|
 |
HART Protocol
|
Universal Input
|
Also Computer Programmable
|
Sensor Burnout Detect
|
Isolation To 500VAC
|
| | | |
|
INTRODUCTION
The SEM310
is an encapsulated in-head temperature
transmitter that replaces the standard connecting block in the sensor
head. It is small in size yet has a performance superior to other
larger and more expensive transmitters. Also available in DIN rail
mount format packaging SEM315.
The SEM310 and SEM315
have full HART communications protocol which allows the
user to quickly and easily download information or interrogate the
device enabling the following:
| Simple re-ranging of sensor type and range.
| Easy on site re-calibration.
| Self documentation.
| Operation with proprietary software packages such
as AMS Plant Web™ and Cornerstone™.
| Remote configuration on the 4 to 20 ma loop with a
hand held communicator or with a PC & HART modem.
| Online Digital Communication concurrent with 4 to
20 ma analog signal. |
| | | | |
All the standard HART universal and
common usage commands are fully implemented, with other device specific
commands that enable access to the enhanced performance parameters of
the SEM310 and SEM315.
Some of the enhanced SEM310
and SEM315 features are as follow:
Sensor Referencing
The SEM310
and SEM315 sensor
referencing via the Windows based RCP2 software allows for close
matching to a known reference sensor eliminating possible sensor errors.
User calibration
In addition to sensor referencing, user offset and current output
trimming is possible via the HART commands.
Custom Linearization
The [X] facility allows the SEM310
and SEM315 to be programmed
with a custom linearization to suit non standard sensors or sensors with
unusual or unique characteristics. Consult the sales office for
details.
Sensor Burn out detection
If any sensor wire is broken or becomes disconnected the SEM310
and SEM315 output will automatically go to its user
defined level (upscale or downscale). This happens irrespectively
of which wire is broken.
Output current preset
For ease of system calibration and commissioning the output can be set
to a predefined level anywhere in the 4-20 ma range.
|
INPUT SPECIFICATION @ 68 °F
INPUT SENSORS AND RANGE
| .RTD
(Pt100) - 2, 3 or 4 wire |
| .Sensor
Range |
.-328 to +1562 °F [18-390
ohms] |
| .Minimum
Span **** |
.77 °F |
| .Linearization |
.BS EN60751 / BS1904 |
| .DIN43760 / JISC 1604 |
| .CUSTOM * |
| .Basic
Measurement Accuracy |
.±0.01% Full Range Input
±0.07% Reading |
| .Thermal
Drift |
.Zero = 0.008 °F/°F |
| .Span = 75 ppm/°F |
| .RTD
Excitation Current |
.300 µA to 550 µA |
| .Maximum
lead resistance |
.50 ohms/leg (balanced for
3 wire) |
| .THERMOCOUPLE |
| .Thermocouple Type |
Measuring Range °F *** |
Minimum Span °F **** |
| .TC Type K |
-328 to 2450 |
90 |
| .TC Type J |
-328 to 2192 |
90 |
| .TC Type T |
-346 to 752 |
45 |
| .TC Type R |
14 to 3200 |
180 |
| .TC Type S |
14 to 3200 |
180 |
| .TC Type E |
-328 to 1832 |
90 |
| .TC Type F (L) |
-148 to 1112 |
45 |
| .TC Type N |
-292 to 2372 |
90 |
| .TC Type [X] |
±9999 |
Custom |
| .Basic
measurement accuracy ** |
.±0.04% Full
Range Input ±0.04% Reading |
| .or 0.25 °F
(whichever is greater) |
| .Linearization |
.BS EN 60584-01
/ BS 4937 / IEC 584-1 |
| .Cold
Junction Error |
.±0.25 °F |
| .Cold
Junction Tracking |
.0.05 °F/°F |
| .Cold
Junction Range |
.-40 to +185 °F |
| .Thermal
Drift |
.Zero =
0.05 µV/°F |
| .Span =
50 ppm/°F |
| .MILLIVOLTS |
| .Input |
.Voltage Source |
| .Range |
.-10 to +75 mv |
| .Characterization |
.Linear |
| .Custom (5th order
polynomial) * |
| .Minimum
Span **** |
.5 mV |
| .Basic
Measurement Accuracy ** |
.±10 µV ±0.07% of
Reading |
| .Input
Impedance |
.10 M ohms |
| .Thermal
Drift |
.Zero = 0.05 µV/°F |
| .Span = 50 ppm/°F |
| .SLIDEWIRE |
| .Input |
.3 wire potentiometer |
| .Resistance
Range |
.10 to 390 ohms [End to
End]
.Larger values can be accommodated by
using an external resistor. |
| .Characterization |
.Linear |
| .Custom (5th order
polynomial) * |
| .Minimum
Span **** |
.5% of Full Range Input |
| .Basic
measurement accuracy |
.0.1% of Full Range Input |
| .Thermal
Drift |
.Zero = 0.003% of
Span/ºF |
| .Span = 50 ppm/°F |
| .Notes
for Input Specifications: |
.*
.**
.***
.**** |
Custom
characterization is available pre-programmed at the factory.
Includes the effect of calibration, linearization and repeatability.
Consult Thermocouple reference tables for practical temperature range.
Any span may be selected but full accuracy is only guaranteed for
spans greater than minimum specified. |
OUTPUT
| .Output
Range |
.4 to 20 ma
(>3.8 to <21.0 ma) |
| .Accuracy |
.±5 µA |
| .Voltage effect |
.0.2 µA/V |
| .Thermal drift |
.0.5 µA/°F |
| .Supply voltage |
.10 to 35 V |
| .Max.
output load |
.[(V supply - 10)/21] K ohm
.250 ohm minimum loop load. Supply
voltages over 30 V require a minimum loop load of 500 ohms. |
GENERAL SPECIFICATIONS
| .Input/Output
isolation |
.500 VAC (tested to 3000
VAC) |
| .Update
time |
.250 ms maximum |
| .Response
time (filter OFF) |
.0.5 second (to 90% of
final value) |
| .Filter
Factor Programmable: |
.Off, selectable between 1
to 32 seconds |
| .Or Adaptive |
| .Warm
up |
.2 minutes to full accuracy |
| .Re-calibration
interval |
.1 Year, to maintain to
published specs.
.5 Years, to maintain accuracy to less
than twice published specs. |
APPROVALS
| .EMC |
.Emissions |
.BS EN 50081-1 |
| .Susceptibility |
.BS EN 50082-2 |
| .Hazardous area |
.FM3610 & EEx ia IIC
T4..T6 (not SEM315) |
ENVIRONMENTAL
| .Ambient
operating range |
.-40 to 185 °F |
| .Ambient
storage temperature |
.-58 to 185 °F |
| .Ambient
humidity range |
.0 to 100% RH
non-condensing |
| .I.S. version 0-100% RH |
ENCLOSURE
| .Material |
.ABS |
| .Flammability |
.SEE UL94-V0 |
| .Spring mounting |
.Free kit with each
transmitter |
RCP2 SOFTWARE
Communicating with the SEM310 and SEM315 HART
transmitters
The SEM310 and SEM315 can
communicate digitally, concurrent with the analog 4-20 ma output
signal. This can be achieved in a number of ways namely:
| Proprietary hand held communicator
| PLC's, DCS's etc with HART interface
| PC Computers using RCP2 and a HART modem |
| |
Communicating with a Hand Held Communicator
SEM310 and SEM315
will communicate with any proprietary HART
communicator and access to all universal commands is available from
the communicator. In order to access all the parameters
available, the communicator must have the correct HART
Device Description (DD) installed. Contact the communicator
provider or 'Support @ Status' to enable up-grading of communicators
that do not contain the right DD.
Communicating with PLCs or DCSs
Any system that supports HART field devices
using such software packages as AMS-Plant Web™ or Cornerstone™
will communicate with the SEM310 and SEM315
enabling access to advanced system features such as self documentation
and diagnostics. The correct DD must be installed for full
access to all parameters.
Communicating with a PC
Communicating with a PC is easily accomplished by using the HART
modem supplied with the communications kit, and RCP2 software.
RCP2 is the menu-driven software product from Status Instruments which
runs under Windows 95, 98 or NT and enables the following functions to
be quickly and easily performed:
| Change sensor type, range, select burnout direction, filter
(damping) factor
| Set tag numbers, assembly numbers, calibration details, message
etc.
| Print or save to file all relevant documentary information
| Read next calibration date
| Perform basic calibration
| Monitor sensor status and read transmitter diagnostics
| Real-time reading of process variable
| Supports up to 15 devices in multi-drop mode |
| | | | | | |
RCP2 software is very 'User-friendly' and can be used immediately
without extensive training. The user is guided through a series
of simple menu screens where the information is clearly and logically
represented. It is available in English and many other languages
(contact sales office for latest information)
|
HART Field Communication Protocol
| HART (Highway Addressable
Remote Transducer) is a communications protocol used to 'talk' to
field devices digitally while, at the same time, using the industry
standard 4-20 ma analog transmission. It is widely used in
process industries such as chemical, oil refining, pulp and paper,
food and pharmaceuticals.
The HART protocol uses the Bell 202
frequency-shift-keying (FSK) standard to superimpose a sinusoidal
signal on top of a 4-20 mA analog signal, a logical 1 being
represented by 1.2K Hz and 0 by 2.2K Hz. The FSK technique means
that digital signals and the analog 4-20 ma can be used concurrently,
thus HART provides bi-directional digital data
interchange while maintaining compatibility with older 4-20 ma
systems. Although it was originally conceived as a
master-slave, single loop implementation with up to two masters, there
is also a multi-drop operating mode accommodating up to 15 slave
devices.
The protocol provides three command
groups:
|
| ********** |
| Universal Commands. |
|
These provide functions that must be implemented in all
field devices, such as "Read unique identifier (manufacturer,
device type, etc.) or "Read Primary Variable (PV)". |
| Common Practice Commands |
|
These provide functions common to many, but not all,
field devices, for example "Write transmitter range values",
"Write PV Units". |
| Device Specific Commands |
|
These provide functions which are more specific to a
particular device, for example "Read Sensor Type, No. of wires,
burnout" |
| *********** |
| Multi-drop HART |
| As well as operating in standard mode the SEM310
and SEM315 support HART multi-drop
mode whereby up to 15 devices can be connected to the same pair of
wires enabling full digital functionality with each device.
The below table shows the full range of HART
commands implemented in the SEM310 and
SEM315. Full access to all these parameters is
available via a PC running RCP2 but in order to gain access to the
full list a third party communicator, the correct Device Description
Language must be installed. Contact Status Instruments Inc. for
communicator upgrade.
The increasing use of 'Smart' equipment will see a marked rise in
the application of digital field bus technology, of which HART
may be considered to be the most widely available with the most
installations. With the trend towards smarter systems with all
the advantages that they offer to the user and the falling cost of HART
products, many customers now expect to have HART
protocol as standard in any instrument that they purchase.
|
| ************************************** |
| GROUP |
COMMAND |
DESCRIPTION
|
| Universal Commands |
0 |
.Read unique
identifier |
| 1 |
.Read primary
variable |
| 6 |
.Write polling
address |
| 11 |
.Read unique
identifier associated with tag |
| 12 |
.Read message |
| 13 |
.Read tag,
descriptor, date |
| 14 |
.Read PV sensor
information |
| 15 |
.Read output
information |
| 16 |
.Read final assembly
number |
| 17 |
.Write message |
| 18 |
.Write tag,
descriptor, date |
| 19 |
.Write final
assembly number |
| Common-Practice
Commands |
34 |
.Write damping value |
| 35 |
.Write range value |
| 40 |
.Enter/exit fixed
current mode |
| 44 |
.Write PV units |
| 45 |
.Trim DAC zero |
| 46 |
.Trim DAC gain |
| 48 |
.Read additional
transmitter status |
| Device-Specific
Commands |
130 |
.Read sensor type,
number of wires, burnout |
| 131 |
.Write sensor type,
number of wires, burnout |
DOWNLOADS
SEM310 Instruction Manual
SEM315 Instruction Manual
SEM310 Literature
ORDER CODE
.SEM310
Standard HART transmitter (Default Pt-100 range 0-100ºC)
.SEM310X
Approved for Hazardous Area Use to FM3610 and EEx ia IIC T5
.SEM315
Standard HART DIN Rail Mount Unit
.CONFIG
310 Pre Configured to Specified Range (State Range on
Order)
.RCP2
Software & Manual
.RCP2-KIT-USA
Programming Kit for SEM310/SEM315
.Consisting of: I/F
Adapter Box, RCPW Software, PSU and Carry Case.
.(Kit for
USA/Canada) |
|
