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MSP900SH
Installation, Operation & Maintenance Manual
IP2040/IM, Rev. AA
May 2007
5.0 Commissioning / Programming
5.1. Current Output
This section gives a very brief overview to allow checking of the installation. For full programming details, refer to the
Operating Manual IP2040/OM.
When power is applied to the transmitter it will give a 4-20mA signal proportional to “level” based on some factory set default
values for a typical tank :-
Bottom reference (depth of tank) 12m from transducer face
4mA level 0m
20mA level 11.7m
Hence, for a liquid surface (or other flat target) that is 5m away, the current on the loop will represent a liquid level of
(12m – 5m) = 7m with a value of 13.57mA.
The user may programme the MSP900SH transmitter with the specific installation details to re-range the 4-20mA signal.
The MSP900SH transmitter is usually connected to a Mobrey Measurement MCU900 control unit which allows access to and
changing of the transmitter operating parameters.
5.2. HART programming of the MSP900SH transmitter
If being used without the MCU900 Control Unit a HART compatible programming device will be necessary (see IP2040/OM)
and the loop must have a load resistor installed.
The Mobrey Measurement PC software ”Mobrey DDConf” is also available, allowing a computer fitted with a HART modem to
communicate with and re-programme the MSP900SH transmitter. Note : A HART modem is supplied with the Mobrey
DDConf software.
To further assist the user who has access to a HART programming tool, Appendix 1 gives a list of the operating Parameters of
the MSP900SH transmitter.
HART transmitters are able to provide up to 4 Variables in digital format. These are known as the Primary (PV), secondary
(SV), Tertiary (TV) and Quaternary (QV) Variables, and are factory set by the manufacturer of the HART transmitter.
HART compatible programming or control devices are able to read these variables and display them on demand.
The MSP900SH variables are factory set as follows:
Primary Variable (PV) The primary reading from the transmitter, normally level, but which the user may
change by programming of the MSP900SH, for example to Contents or Flow.
Secondary Variable (SV) Factory fixed to read the level calculated by the MSP900SH
Tertiary Variable (TV) Factory fixed to read distance (range) to target.
Quaternary Variable (QV) Factory fixed to read the temperature recorded by the MSP900SH.
When being used with an MCU Series control unit, these variables are available to view as parameters:
PV D900
SV D901
TV D902
QV D903