Status SEM320 User manual
D2620-02-01
SEM320 USER GUIDE
HART HEAD MOUNT TEMPERATURE TRANSMITTER WITH DISPLAY
TWO WIRE (4 to 20) mA OUTPUT
Important - Please read this document before installing.
Every effort has been taken to ensure the accuracy of this document; however, we
do not accept responsibility for damage, injury, loss or expense resulting from errors
and omissions, and we reserve the right of amendment without notice.
IMPORTANT - CE & SAFETY REQUIREMENTS
Product must be mounted inside a suitable enclosure providing environmental
protection to IP65 or greater.
To maintain CE EMC requirements, input wires must be less than 3 metres.
The product contains no serviceable parts, or internal adjustments. No attempt must
be made to repair this product. Faulty devices must be returned to supplier for
repair.
This product must be installed by a qualified person. All electrical wiring must be
carried out in accordance with the appropriate regulations for the place of
installation.
Before attempting any electrical connection work, please ensure all supplies are
switched off.
ABSOLUTE MAXIMUM CONDITIONS (To exceed may cause damage to the device).
Supply Voltage
± 30 V dc (Protected for over-voltage and reverse
connection)
Current with over-voltage
± 100 mA
Input Voltage
± 3 V between any terminals
Ambient
Temperature (-40 to 85) °C, Humidity (10 to 95) % RH (Non-
condensing)
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1~DESCRIPTION.
The device is a universal in-head HART transmitter with display that converts the
sensor output(s) over a configured range to a standard industrial (4 to 20) mA
transmission signal.
The product is a HART generic device so does not need a specific HART file.
Simple HART commands can be performed using a handheld programmer;
advanced commands are entered using the PC USB configuration module and
Calibration set up may be saved as a file on the PC for later use. If required, the
desired range can be specified at the time of order, removing the need for user
configuration.
2~RECEIVING AND UNPACKING.
Please inspect the packaging and instrument thoroughly for any signs of transit
damage. If the instrument has been damaged, please notify your supplier
immediately.
3~SPECIFICATION.
Refer to data sheet for full specification.
Configuration
Factory default
Pt100, (0 to 100) °C, upscale burnout, 0.0°C offset
4~INSTALLATION AND WIRING.
4~1 MECHANICAL.
The display device is mounted using a three-pin plastic module support suitable for
fitting into a suitable connection head. The module support is secured into the head
with screws.
The orientation of the display can be adjusted as required by rotating the display in
the module support. Care must be taken to avoid over-stressing any wiring.
The display must be installed with adequate protection from moisture and corrosive
atmospheres. The device must be located so the ambient temperature does not
exceed the specified operating temperature of the device.
4~2 ELECTRICAL.
Electrical connections are made to the two-part screw terminals provided on the
back of the device. The transmitter is protected against reverse connection and
over-voltage. If no sensor (input) connection is made, the transmitter will go into
either up or down scale output current, depending on configuration setting.
TURN OFF SUPPLY BEFORE WORKING ON ANY ELECTRICAL CONNECTION
For a wiring diagram, please refer to the rear panel of the device inside the
case housing, and this document.
Two-part connectors are used for input and output connections, allowing the
device to be easily removed if required.
Figure 1: Rear panel layout
Input sensor connections.
Figure 2: Input connections
RTD input wires must be equal length and type.
Sensor connections are as figure 2: to maintain BS EN61326
compliance, sensor wires must be less than 3 metres. All sensor
connections must be isolated from ground.
For RTD dual input use two wire RTDs. If required, user-offsets can be done on
both inputs to known input values.
Thermocouple inputs must use correct compensation cable.
Sensor connections are as figure 2: to maintain BS EN61326 compliance, sensor
wires must be less than 3 metres. All sensor connections must be isolated from
ground.
For dual thermocouple input, both thermocouples must be of the same type.
If required, user-offsets can be done on both inputs to known input values.
D2620-02-01
4~2 ELECTRICAL (Continued).
(4 to 20) mA Loop connections.
Ensure all other aspects of the installation comply with the requirements of this
document. To maintain CE compliance, the (4 to 20) mA current loop must be tied to
a local earth at one point; this is normally at the power supply.
Use twisted pair or screened cables for cable lengths greater than 3 metres.
Maximum cable length 1000 metres.
.
5~USER CONFIGURATION.
IMPORTANT
READ COMPLETE SECTION BEFORE ATTEMPTING CONFIGURATION.
WARNING
For configuring or reading live data if using a grounded input or output, it is
important not to connect the programming USB lead to a mains powered computer.
It is possible to damage the instrument if connected in this way.
To avoid damage, use one of the following methods:
•Disconnect the input and output connectors before configuration, reconnect the
connectors after configuration.
•Use a laptop-type computer running from its battery power supply, not
connected to a mains supply. This is recommended for reading live device
data or offsetting a device if already installed in the field.
•Use a USB isolator between the computer and the device.
DISPLAY: The display provides five 7-segment characters for display of value and 5
14-segment characters for messages, together with a 10-segment bar graph, % of
output signal display and five icons. The display is capable of operating in an
ambient temperature range of (-20 to 85) °C, but at temperatures lower than -5 °C
(due to the slower LCD speed) scrolled messaging is not practical.
The display’s high contrast offers clear readouts at low as well as high ambient light
and direct sunlight.
The display layout is as follows:
Figure 3: Display layout.
1. Indicated HART communications
2. Main numeric value display
3. Signal out-of-range warning icon
4. Bar graph of output
5. % of output
6. Bespoke °C and °F temperature indication devices (mA not used)
display.
5~1 USBSpeedLink USER CONFIGURATION
A USB configuration module is required for connecting the device to the PC. Refer
to your supplier for details.
The device can be configured whilst connected and powered but a portable battery
powered computer must be used to avoid the effects of ground loops if the (4 to20)
mA loop is grounded. This may cause damage to the display device.
Figure 4: Configuration connection.
Install the software and connect the USB configuration module
Configuration steps
1
Install the software and connect the USB configuration module to the PC.
2
Remove the rear panel cover held by two screws (see figure 1)
3
Connect the configuration module to the device (observe orientation).
4
Select the correct programming page in the software.
5
Read the device configuration into the software.
6
Re-configure or adjust configuration options as required.
7
Send the new configuration to the device.
Configuration options in USBSpeedLink software
Sensor tab
Input type
RTD (type, No. of wires), T/C (type), Ohms, Slide-wire,
mV
Single input, dual input (with maths).
Sensor offset
In engineering devices, can be entered for probe/system
correction
Burn out
Any value in input devices to control device behaviour on
input fail
Sensor pre-set
An internal “simulated” value can be applied to the input
of the device for diagnostics
Process display scaling tab
Mode Off
Normal use for °C temperature inputs
Mode Scale
Select for °F, process and dual inputs
Mode Profile
Gives 22-segment user-linearisation tool for custom
input to output relationship. Can be used to apply
probe corrections at up to 22 points.
Display decimal place
Used to set the required number for the display
mA output tab
Damping
Seconds to reach 76% of final value
Low mA
Engineering value to give 4 mA output
High mA
Engineering value to give 20 mA output
Fixed loop
The device can be set to give a pre-set mA output. The
device will return to normal operation after a power
reset, for diagnostics.
Current limits
Can be used to set the minimum and maximum current
values the device can output. Useful for defining burnout
condition.
Namur 43 standard
Burnout control, on or off
Use this space for configuration notes if required.
D2620-02-01
5~1 USBSpeedLink USER CONFIGURATION (continued)
Display messages tab
Range
Use to set up to 6 defined temperature/process bands
that can have fixed or custom messages assigned to
them.
The display will show the messages in turn, with the
input value, when within the selected band.
Message
Define up to 6 custom messages that can be displayed
when the input value is within pre-set bands
MsgA, MsgB
Sets which messages are displayed for each band
Bar and %
Selects whether to show the % of input range bar and
the % of input range value on the screen
Diagnostic tab
Operation data
Will display:
Maximum and minimum values since last reset
Operational time from manufacture
Operational time from calibration
Calibration date
Cal cert number
Free type field saved to the device
Calibrated by
Free type field saved to the device
Save transducer
Will save the configuration manifest to a text file on the
PC
HART data tab
Tag number
HART specified; free type field saved to the device
Date
HART specified; saved to the device
Description
HART specified; free type field saved to the device
Message
HART specified; free type field saved to the device
Final Assembly
HART specified; number saved to the device
Long tag
HART specified; free type field saved to the device
Transducer
number
HART specified; number saved to the device
Write protect
HART write protect: On, Off
Read HART
Transducer
ID
Configuration
counter
Number of changes made via HART communications
HART information tab
HART information flags
On, Off, see below
HART information flags
With a device connected to the configuration module, the software can display
some live data readings. The sections to the right-hand side and the bottom of the
screen are used.
Live data reading
Sensor A
Input value
Sensor B
Input value
Pre-process
Pre-maths input value
Process variable
Post-maths input value
Loop output %
Loop output as a % of range
Loop mA
Loop output in mA
Cold junction
Temperature of the cold junction
Sensor wire
Error detection for input wiring
Loop
Error detection for loop wiring
USBSpeedLink menu buttons
Menu button Icons from left to right
Exit: Close the program
Send configuration <: Will send the current screen configuration to the device
connected.
Retrieve configuration >: Will load the configuration from the connected device
into the screen of the USBSpeedLink software.
Save: Saves the current screen configuration to a PC file for back-up.
Load: Recalls a backed-up configuration file from the PC,
M+:Saves the current screen configuration to a temporary memory file.
M: Recalls the temporary memory configuration to the screen.
Circular red arrows: Will show to indicate that the screen and the configuration on
the device do not match and will need to be synchronised with either a read or a
write command.
Menu button icons from left to right
?: Opens the USBSpeedLink help files
>Auto read: Will start consecutive live data readings, this can be time adjusted.
The data values will be displayed on screen.
Read: Will take a single live data reading to be displayed on screen.
5~2 HART USER CONFIGURATION
The SEM320 has HART communications. The SEM320 is a generic HART device.
For a list of implemented HART commands please refer to the data sheet.
Connection is as shown below. A suitable load resister (250 Ohm) must be used in
the loop.
Figure 5: Connection arrangement for HART communications
The SEM320 can be used in HART multi-drop mode. Each device must be given a
unique address; this can be done using a HART communications device or with the
USBSpeeedLink software.
Figure 6: Connection arrangement for HART multi drop communications
For more information on the HART protocol, refer to the Fieldcomm group website
https://fieldcommgroup.org/
D2620-02-01
6~CONFIGURATION EXAMPLES
Example ~1: Change from °C to °F range
The SEM320 will default to work in °C for temperature measurement. It may be
desired to work in °F or K
Change a °C to a °F range
1
Sensor Tab
Set input type, sensor fail value
2
Process Display
Tab
Select the “Scale”radio button
On the temperature range Wizard select “°F”
3
mA Output Tab
Set the output range, in °F
Example ~2: Using the profile tool.
The SEM320 has a profiling tool that can be used to create custom configurations.
This can be used in many ways such as linearising a slide-wire level sensor to volume
on non-linear tanks, or temperature probe/system calibration corrections.
1) A Pt100 probe has been calibrated with a SEM320 display and found to have the
following characteristics:
Temperature °C Display °C
0.00 -0.05
25.00 25.55
50.00 51.08
100.00 101.40
This can be entered as a correction using the profile tool:
Probe calibration corrections using the profile tool
1
Sensor Tab
Set input type, sensor fail value
2
Process Display
Tab
Select the “Profile” radio button
Set the number of points required
Enter the profile in ascending order with the
recorded values in the first column and the
corrections in the second column.
3
mA Output Tab
Set the output range
2) A non-linear tank volume 10 k litre monitored by a slide-wire sensor can be entered
as shown in the example below:
Non-linear slide-wire tank volume in litres using the profile tool
1
Sensor Tab
Set input type, sensor fail value
2
Process Display
Tab
Select the “Profile” radio button
Change the process unit to “L”
Set the number of points required
Enter the profile in ascending order with the
input values in the first column and the
process values in the second column.
3
mA Output Tab
Set the output range
Example ~3: Display Messages
The SEM320 has a lower display for rolling messages and engineering unit display,
see section 5~ Figure 3, Item 7.
A set of custom messages can be displayed on the SEM320 over pre-defined ranges.
One (Msg A) or two (Msg A + Msg B) messages can be applied to each range.
Custom message display
1
Display
Messages Tab
Use the table on the left to set up the boundaries for the
ranges.
2
Use the drop-down selections to set which
messages are applied to the ranges.
3
Use the text boxes on the right to create the required
message.
In the set up below, the following messages would show on the lower rolling display:
Below 0°C “SIGNAL ERROR” +” SHUT DOWN CALL 123”
(0 to 25) °C “UNDER TEMPERATURE”
(25 to 40) °C “OK”
(40 to 100) °C “OVER TEMPERATURE”
(100to 133) °C “OVER TEMPERATURE”
(133 to 166) °C “OVER TEMPERATURE”
(166 to 200) °C “OVER TEMPERATURE”
Above 200°C “SIGNAL ERROR” +” SHUT DOWN CALL 123”
The lower display can also be set to display the output current in mA and the
temperature of the cold junction of the device (even when not configured for a
thermocouple input)
Status Instruments Ltd, Status Business Park, Gannaway Lane, Tewkesbury,
Gloucestershire, UK, GL20 8FD
Web Page: www.status.co.uk,
Email: sales@status.co.uk
Tel: +44 (0) 1684 296818, Fax: +44 (0) 1684 293746
Other Status Transmitter manuals
