Det-tronics THZ HART Combustible Gas Transmitter Instrukcja Użytkownika Pobierz pdf

DESCRIPTION

The DEC-THZ Toxic Gas Transmitter is a Class I,

Division 1 approved device when used with an

approved sensor, and is compatible with the entire

line of Det-Tronics electrochemical toxic gas sensors.

It provides a linear 4-20 mA output proportional to the

sensor input, as well as a large digital display for indi-

cating the detected gas level.

The model DEC-THZ Toxic Gas Detector is com-

prised of two assemblies:

•A Det-Tronics Model C7064X electrochemical gas

sensor, which is a two-wire, loop-powered gas sen-

sor providing a linear 4-20 milliampere output.

•A Model THZ Transmitter, which is specially config-

ured to accept the 4-20 mA signal from the

C7064X gas detector. The Model THZ provides

the HART signal along with the analog signal.

TRANSMITTER COMMUNICATION

The DEC-THZ transmitter output is ready for direct

interface with HART or non-HART based DCSs, PLCs,

and other computer-based SCADA systems. The

DEC-THZ is easily configured, monitored, or calibrat-

ed from anywhere on the 4-20 mA loop using a stan-

dard hand-held HART Communicator (such as a

Model HC275), a HART-based control system, or an

Asset Management System (AMS).

AUTOMATIC DIAGNOSTICS

The transmitter performs continuous sensor diagnos-

tics. If the sensor fails or otherwise stops sending a

signal during operation, the transmitter warns of a

trouble condition, and provides a HART digital error

message that can be read by a HART communicator

or system. The transmitter uses a modular electronics

design, which allows for easy removal and replace-

ment in the event of a malfunction.

TRANSMITTER ENCLOSURE

The transmitter’s aluminum enclosure features a

sealed, dual-compartment interior to isolate and pro-

tect the electronics from humidity, moisture, or corro-

sive agents that could possibly enter through the

cable conduit entry. The enclosure also has a screw-

on front cover with glass window to enable easy view-

ing of the detected gas level, and a screw-on rear

enclosure cover to enable easy access to the wiring

termination area. The enclosure provides two 3/4 inch

NPT conduit entries — one for the sensor, and one for

field cabling.

INSTRUCTIONS

Toxic Gas Detector

with HART Output

DEC-THZ

DET-TRONICS

1 2 3 4 5 6 7 8

Podsumowanie treści

Strona 1 - DET-TRONICS

DESCRIPTIONThe DEC-THZ Toxic Gas Transmitter is a Class I,Division 1 approved device when used with anapproved sensor, and is compatible with the enti

Strona 2 - SPECIFICATIONS

SPECIFICATIONSDETECTION RANGE—Depends on sensor selected. Refer to form number90-1079 (Specification Data sheet for Det-Tronicselectrochemical sensor

Strona 3 - INSTALLATION

INSTALLATIONDETECTOR LOCATION AND ORIENTATIONThe gas sensor used with the THZ transmitter is a dif-fusion-based gas sensor. Therefore, it must contac

Strona 4 - CALIBRATION

CONFIGURATION USING HART COMMUNICATIONThe DEC-THZ gas detector is shipped from the facto-ry pre-configured. If it is necessary to change anyHART con

Strona 5 - 5 95-8550

Important Calibration Notes•Ensure that the transmitter is properly programmedfor the gas concentration being used for calibration.• Ensure that only

Strona 6 - MAINTENANCE

MAINTENANCEROUTINE MAINTENANCEThe DEC-THZ requires no routine maintenance,except for periodic checks to ensure proper calibra-tion. The frequency of

Strona 7 - ORDERING INFORMATION

5. Be sure that the O-ring inside the sensor base isin good condition, then re-install the cap. Tightenonly until snug. Do not over tighten.6. Re-ap

Strona 8 - ISO 9001

Detector Electronics Corporation6901 West 110th Street • Minneapolis, Minnesota 55438 USAOperator: (952) 941-5665 or (800) 765-FIRECustomer Service: (

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