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MSP900SH
Installation, Operation & Maintenance Manual
IP2040/IM, Rev. AA
May 2007
1.0 Introduction
The MSP900 ultrasonic level transmitter is designed to be mounted above a liquid and will measure the distance to the liquid
surface.
When programmed with details of the vessel, sump or open channel, the MSP900 will compute level, contents or flow and give
a 4-20mA signal proportional to the chosen variable. Full programming details are given in the Operating Manual IP2040/OM.
MSP900 is a two wire 24V dc loop powered transmitter and may be connected to any suitable dc power source using the
factory fitted cable. The Mobrey Measurement MCU900 range of Control Units is designed to be used with the MSP900
Transmitter in this way.
The MSP900 transmitter may be mounted in a hazardous area provided that it is supplied from a protected power supply.
When using the MSP900 transmitter with an MCU900 Control Unit, no external Intrinsically Safe Barriers are required as all
protection is built-in to the MCU900 Control Unit.
When using any other power supply, it is the responsibility of the user to ensure suitable Intrinsically Safe Barriers are
installed. Full details are given in section 3.4.1
2.0 The MSP900SH ultrasonic level transmitter.
The transmitter is a factory sealed unit with an operating range of 0.3m to 12m. When powered up the transmitter will give a
4-20mA signal on the two wire power cable over the factory default range : 4mA at 12m; 20mA at 0.3m. This range may be
adjusted using a HART programmer. See section 5.0
(Note: full programming instructions are given in the Operating Manual IP2040/OM)
Fig (i)
A Stainless Steel mounting bracket and 1” thread type – G1” (1” BSPP) (-A); 1” NPT (-U) Nylon locknut are supplied with the
transmitter to facilitate mounting.
2.1 Type numbering system
MSP Mobrey Ultrasonic level transmitter
900 UPVC construction, 12m operating range
SH Factory sealed transmitter, HART communications
-A ATEX & CSA certified intrinsically safe for Zone 0
-U FM & CSA certified intrinsically safe for Zone 0 and FM for DIV 1
/3 Fitted with 3m two core shielded cable
/20 Fitted with 20m two core shielded cable
/50 Fitted with 50m two core shielded cable