SMAR LD303, Operation And Maintenance Instruction Manual

Page: 73 / 110

Maintenance Procedures
4.5
Every time the power is turned on, the main circuit reads the sensor serial number, should it differ
from the number stored in the memory. The circuit understands that there is a new sensor and the
following information is transferred from the sensor to the main circuit.
x
Temperature compensation coefficients;
x
Sensor's trim, including 5-point characterization curve;
x
Sensor characteristics: type, range, diaphragm material and fill fluid.
The other transmitter characteristics are stored in the main circuit memory and are not affected by
sensor change.
Upgrading LD301 to LD303
The sensor and casing of the LD301 is exactly the same as the
LD303
. By changing the circuit
board of the LD301 it becomes a
LD303
. The display on LD301 version 5.XX is the same as on
LD303
and can therefore be used with the
LD303
upgrade circuit board. With a LD301 version three
or earlier, that display can not be used.
Upgrading the LD301 to a
LD303
is therefore very much the same as the procedure for replacing
the main board described above.
To remove the circuit board (
5
), loosen the two screws (
3
) that anchor the board.
Caution with the circuit boards must be taken as mentioned above.
Pull the LD301 main board out of the housing and disconnect the power supply and the sensor
connectors.
Put in the
LD303
main board reversing the procedure for removing the LD301 circuit.
Returning Materials
Should it become necessary to return the transmitter and/or configurator to
SMAR
, simply contact
our office, informing the defective instrument serial number, and return it to our factory.
If it becomes necessary to return the transmitter and/or configurator to Smar, simply contact our
office, informing the defective instrument's serial number, and return it to our factory. In order to
speed up analysis and solution of the problem, the defective item should be returned with the
Service Request Form (SRF – Appendix B) properly filled with a description of the failure observed
and with as much details as possible. Other information concerning to the instrument operation,
such as service and process conditions, is also helpful.
Instruments returned or to be revised outside the guarantee term should be accompanied by a
purchase order or a quote request.
ACCESSORIES
ORDERING CODE DESCRIPTION
SD1 Magnetic Tool for Local Adjustment
BC1 Profibus/RS232 Interface
PS302 Power Supply
FDI302 Field Device Interface
BT302 Terminator
DF47 Intrinsic Safety Barrier
DF48 Profibus Repeater