4 OI/DHH805-EN Rev. D
| Handheld communicator Model DHH805-A
1 Introduction
1. Introduction
1.1 Instruction manual structure
The present manual provides information on operating and
troubleshooting the hand held terminal DHH805-A. Every section
in the present manual is dedicated to the specific phase of the
life cycle starting from the receipt of the communicator and its
identification, detailing activation process, connection to the
instrument, configuration, troubleshooting, license upgrade,
firmware update and maintenance operations.
1.2 Models covered by this manual
DHH805-A is the model number for the handheld product
covered by this manual.
1.3 Product description
The Hand Held Communicator provides a smart interface with
HART electronic devices: it is designed to enable the plant
engineer to configure, calibrate and troubleshoot the
transmitters either before or after field installation.
The Hand Held Communicator can store in its non-volatile
memory hundreds of transmitter configurations.
The Communicator employs a four line by twenty dot matrix
characters LCD and a 23 key tactile feedback keyboard.
The hand held terminal is based on standard Bell 202 FSK
(Frequency Shift Keying) current modulation superimposed on
the 4 to 20 mA analog signal: since the energy balance added
to the current loop is virtually equal to zero no disturbance or
interference occurs on the analog process signal.
This version of the Communicator, when powered by internal
rechargeable batteries, is certified intrinsically safe for use in
hazardous locations according to the standard printed label
placed on the battery pack.
Summary of Contents for DHH805-A
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