Product Overview; Getting Started; Figure 1: Connecting A Pc To A Hart Device - MSA General Monitors OBSERVER-i User Manual

Ultrasonic gas leak detector

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OBSERVER-i HART

3.0

PRODUCT OVERVIEW

The Observer-i is an ultrasonic gas leak detector for detecting pressurized gas leaks. The Observer-i

detects the gas leak by measuring the sound level and reports the measurement in decibel (dB).

3.1

In order to enable HART communication with the Observer-i detector, users may employ several means

including HART handheld communicators or PC-based systems.

Using a PC-based software

application and a HART interface modem, for example, allow operators to access information from the

Observer-i. A typical setup is illustrated in Figure 1.

Once the detector is installed (see Observer-i Instruction Manual) and connected to a PC, host

application, or handheld terminal, the master will begin communication to the Observer-i by using the

HART Command #0. The field device will then respond only if its tag matches. The data in the reply to

Command #11 is identical to that of Command #0, so the master can then construct the Unique

Identifier for use with further commands.

NOTE: The handheld device allows for the retrieval of diagnostic information and input of device

settings as needed and should not be used as a permanent part of a safety system.

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