Endress+Hauser Gammapilot FTG 671 Bedienungsanleitung

gammapilot

FTG 671

Level Limit Detection

Operating Instructions

BA 082F/00/en/12.03

016309-1000

Software 1.3

Hauser

Endress

The Power of Know How

Short Instructions

Operation

Selects vertical matrix position

Selects horizontal matrix position

Select positon V0H0

Selects next digit

Move decimal point

Increases value of digit

Decreases value of digit

Registers entry

Function Matrix Action

Reset transmitter V9H5 ●Enter 671: see above for key functions

Press »E« to register entry

Calibrate V3H0

V3H4

V0H1

V0H2

V0H9

●Enter 5 to select standard calibration with background calibration

Press »E« to register entry

●Enter calibration date: year (3 = 93), week (01…53 )

weekday (1=Monday etc.)

Press »E« to register entry

●With vessel empty (wait 100s)

Press »E« to register entry

●With vessel full (wait 100s)

Press »E« to register entry

●With radiation off and vessel full (wait 100s)

Press »E« to register entry

Integration time V0H4 ●Enter max. permissible integration (relay switching) time in s

Press »E« to register entry (default = 7 s)

Relays (default values) …●Relay 1 is set automatically to maximum fail-safe mode

Switch-off point 38, switch-on point 72

●Relay 2 to maximum fail-safe mode

Switch-off point 72, switch-on point 38

FTG 671

Measured

value

Matrix

selection

Relay status

red: de-energised

green: energised

Parameter entry

Commulog

sockets

Alarm relay

lit: fault

Matrix position

See also »Controls«, Chapter 3

The FTG 671 transmitter and DG 57 detector must be powered up for at least 6 hours before configuration

Quick Configuration (for Cs137, DG 57) with background calibration

Gammapilot FTG 671 Short Instructions for Use

Inhaltsverzeichnis

1 Introduction . . . . . . . . . . . . . . 5

1.1 Application . . . . . . . . . . . . . . . . 6

1.2 Measuring system . . . . . . . . . . . . . 7

1.3 Measuring principle . . . . . . . . . . . . 8

1.4 Functional description . . . . . . . . . . . 9

2 Installation . . . . . . . . . . . . . . 11

2.1 Measuring system . . . . . . . . . . . . 11

2.2 Installation hints for source container and detector 12

2.3 Gammapilot installation . . . . . . . . . . 18

2.4 Transmitter wiring . . . . . . . . . . . . 20

2.5 Hardware configuration . . . . . . . . . . 24

2.6 Technical data . . . . . . . . . . . . . 25

3 Controls . . . . . . . . . . . . . . . 27

3.1 Commutec operating matrix . . . . . . . . 27

3.2 Configuration from front panel . . . . . . . 28

3.3 Configuration with Commulog VU 260 Z . . . 29

4 Calibration and Operation . . . . . . . 31

4.1 Commissioning . . . . . . . . . . . . . 31

4.2 Standard calibration with background calibration

(for detector DG57) . . . . . . . . . . . . . 33

4.3 Standard calibration (normal) without background

calibration (for DG 17 and DG 27) . . . . . . . 34

4.4 Auxiliary calibration . . . . . . . . . . . 35

4.5 Limit switches . . . . . . . . . . . . . . 36

4.6 Additional functions . . . . . . . . . . . 37

4.7 Measured value display . . . . . . . . . . 37

4.8 Locking the parameter matrix . . . . . . . 38

5 Limit Switches - Relays . . . . . . . . 39

5.1 Configuration . . . . . . . . . . . . . . 40

5.2 Acknowledgement mode . . . . . . . . . 45

6Maintenance

. . . . . . . . . . . . . 47

7 Trouble-Shooting . . . . . . . . . . . 49

7.1 Trouble-shooting tables . . . . . . . . . . 49

7.2 Fault by Gammagraphy . . . . . . . . . . 51

7.3 Simulated operating mode . . . . . . . . . 52

7.4 Exchanging transmitters and detectors . . . . 53

7.5 Repairs . . . . . . . . . . . . . . . . 54

Gammapilot FTG 671 Table of Contents

Notes on Safety

Radioactive sourcesRadioactive isotopes are used as sources for level detection by gamma radiation. The

source is encapsulated in a welded, double-walled container of special steel.

•In practically all countries, the handling and operation of radioactive sources

is governed by strict regulations which are enforced by a national radiation

protection board.

•Authorisation, which usually includes a requirement for personnel specially

trained in radiation protection, must be obtained from this board before the

equipment enters the factory.

•If you are in any doubt as to the regulations in your country, call your E+H sa-

les office or representative - they will be glad to help you further!

Endress+Hauser radiometric systems are designed, manufactured and shipped with

special regard to German and International radiation safety regulations. Original radiometric

systems are normally delivered equipped with double-encapsulated sources of Cs 137 or

exceptionally Co 60, both complying with DIN 24426/ISO 2919 classification 66646. This is

acknowledged as the highest safety classification for industrial source containments.

CertificatesThe Gammapilot FTG 671 is a transmitter for level limit detection which can be used with

a variety of radioactive sources and detectors. It must be installed by qualified personnel

according to the instructions in this manual.

The transmitter and ancillary equipment are available with certificates. The Table below

indicates the combinations available and conditions for installation. Full details can be

taken from the certificates. Please note that where quoted technical data differs from that

listed in Section 2.6, that in the certificate applies.

Certificate Instruments Notes

PTB 99 ATEX 2089 Gammapilot FTG 671 II(2)G / [EEx ib] IIC,

s. Safety instructions XA 054F-C

DIBt Check Report

PA-VI 850.01

Gammapilot FTG 671 Overflow protection according to

WHG

PTB Nr. Ex-94.C.1019

ATEX 1104

DG 57-A…

DG 57-H…

DG 57-M…

EEx d ib IIC T6 / ATEX II 2 G

EEx d IIC T6 / ATEX II 2 G

EEx de IIC T6 / ATEX II 2 G

s. Safety instructions XA 057F-A

DMT 01 ATEX E 093 DG 57-D... ATEX II 2 D IP 65 T 60°C

s. Safety instructions XA 112F-A

PTB Report 6.62-1972/1

PTB Report 6.62-1972/2

PTB Report 6.32-2005

QG 020

QG 100

QG 2000

Report on local dosage

measurement on source container

Gammapilot FTG 671 Notes on Safety

Safety conventions

In order to highlight safety-relevant or alternate operation procedures in the manual the

following conventions have been used, each indicated by a corresponding icon in the

margin.

Note!

•A note highlights actions or procedures which, if not performed correctly, may

indirectly affect operation or may lead to an instrument response which is not

planned.

Caution!

•Caution indicates actions or procedures which, if not performed correctly, may lead

to personal injury or incorrect functioning of the instrument

Warning!

•A warning indicates actions or procedures which, if not performed correctly, will

lead to personal injury, a safety hazard or destruction of the instrument

Gammapilot FTG 671 Notes on Safety

1 Introduction

Short instructionsThe front cover contains short instructions for the standard set-up, level limit detection

with two limit relays, using the FTG 671, DG 57 and Cs 137 source.

In this manualUsers unfamiliar with the Gammapilot FTG 671 must read the operating instructions

which are structured as follows:

•Chapter 1: Introduction;

contains general information including application, measurement

principle and functional description.

•Chapter 2: Installation

contains instructions on the installation of the radioactive source,

Geiger-Müller and scintillation counters, Gammapilot FTG card,

hardware configuration, connection diagrams and technical data

for the plug-in card.

•Chapter 3: Controls;

describes operation with the front panel keys, Commulog VU 260 Z

and ZA 67…gateways.

•Chapter 4: Calibration and Operation;

tells you how to commission and operate the Gammapilot for level

limit detection.

•Chapter 5: Limit Switches;

describes in detail the setting of the relays for fail-safe or

acknowleged operation.

•Chapter 6: Trouble-Shooting;

contains a description of the self-checking system with error

messages, the simulation feature as well as instructions for

configuration on replacement of the transmitter, source or detector.

•Index lists key words to help you find information quickly.

Further documentationIn addition to this manual, the following publications provide information on configuration

of the Gammapilot FTG 671.

•BA 028 Commulog VU 260 Z handheld terminal

•BA 054 ZA 672 Modbus Gateway

•BA 073 ZA 673 Profibus Gateway

•BA 085 ZA 674 FIP Gateway

The installation of the radioactive source and detector is described in the documentation

accompanying these articles as well as briefly in Chapter 2.

•TI 264F Source Container QG 020/100

•TI 346F Source Container QG 2000

•TI 180F Scintillation Detectors DG 57

•TI 197F Geiger-Müller counters DG 17 and DG 27

When installing detectors in explosion hazardous areas the instructions included in the

accompanying certification must also be observed.

Gammapilot FTG 671 Chapter 1: Introduction

1.1 Application

The Gammapilot FTG 671 is designed as a

•non-contact, level limit switch

for containers (mixers, reactors, hoppers, silos, tanks) e.g. with inflammable, poisonous

and aggressive bulk material and liquids. It is also suitable for applications in the food

processing industry, e.g. on product filling lines.

Gammapilot transmitters may also be used for applications in explosion hazardous

areas, e.g. in acid tanks, boilers, cement silos, etc., and possess intrinsically-safe sensor

circuits conforming to EEx ib IIC. A list of certificated combinations is to be found in

»Notes on Safety« preceding this chapter.

Min./max.

relays

Gammapilot

FTG 671

transmitter

BA082E01

Source Detector

Alarm relay

Fig. 1.1:

Standard application showing

Gammapilot FTG 671, source

and detector

Maximum

level

detection BA082E02

Minimum

level

detection

Fig. 1.2:

Left:

Conveying limestone

Gamma radiation barriers control

the drying process

Right:

Automatic filling of beer barrels

The level is checked as the

barrels move past the barrier

FTG 671

Vibration

channel

Feed rate

1 barrel/2s Full move forward

Half full are

rejected

BA082E03

FTG 671 Filling

station

Gammapilot FTG 671 Chapter 1: Introduction

1.2 Measuring system

A working system for limit level detection comprises:

•Gammapilot FTG 671 transmitter,

•QG 020 or QG 100 source container with Co 60 or Cs 137 gamma source

•DG 17 or DG 27 Geiger-Müller counter or

DG 57 scintillation counter.

The Gammapilot may operate as a stand-alone or system unit. Two relays act as freely

programmable limit switches which can be operated in fail-safe or acknowledgement

mode. An alarm relay monitors the correct functioning of the measurement point and

trips on fault condition.

If controlled remotely with other Commutec transmitters within a process control system,

the Gammapilot is addressed via the Rackbus. In this case, communication is controlled

by a ZA 67…Gateway which converts Rackbus data into the appropriate network

protocol. The Gammapilot can be remotely configured, its measured data and status

scanned and its settings up and downloaded through the Gateway.

BA082E41

Detector and source container

in hazardous area

FTG 671 in safe

area

Fig. 1.3:

Gammapilots FTG 671 row

mounted in Monorack II

housings

BA082E04

Commutec transmitters

Rackbus

Personal

computer or

PC system

Programmable logic

controller with Modbus port

Sensors Actuators

RS-232C interface

Modbus interface

ZA 370

ZA 371

ZA 672

Fig. 1.4:

The Gammapilot FTG 671 can

be used as part of a process

control system.

Here it is shown with other

Commutec transmitters and the

ZA 672 Modbus Gateway

Gammapilot FTG 671 Chapter 1: Introduction

1.3 Measuring principle

Gamma ray absorption When Gamma radiation penetrates a material, it is absorbed to a degree dependent

upon the density ρ, and thickness d of the material as well as the linear absorption factor

µ, which is also dependent on the material and source. The attenuation Fsis given by:

Fs= e−µ • ρ•d

The radiation also decreases with the square of the distance between source and

detector. For limit switching µ, ρ, and d are constants and the detected radiation level

depends upon the presence or not of material in the beam. The countrate is at a maximum

when the beam is completely free and at a minimum when the all radiation has to travel

through the material. The maximum and minimum countrates Nmax and Nmin are obtained

when the transmitter is calibrated. Their dependency is given by:

Nmin =N

max/Fs= Nmaxe−µ • ρ • d

The FTG 671 output is normalised to produce the end values 0 and 100, relay 1 trips at

38 in minimum and relay 2 at 72 in maximum fail-safe mode (10 and 90 for DG 17/27 (Z)

detectors). The detection band is dependent upon the orientation of the detector, which,

however, is usually mounted horizontally on the vessel.

Statistical assessment The precision of a gamma limit switch is dependent on the statistical variation in

countrate. Since the emission of gamma rays from a radioactive source is a random

phenomenom, several successive countrate measurements taken over a given period

of time will be seen to vary randomly about a mean value. The degree of variation between

measurements depends upon the time interval chosen. The measurement precision

depends on the confidence level - 1σ, 2σor 3σ - which is to be attained. For a countrate

of N pulses per second:

±1σ = ±1√N 68.28% confidence level

±2σ = ±2√N 95.45% confidence level

±3σ = ±3√N 99.74% confidence level

Normally a confidence level of 2σis used. The statistical variation is reduced by

increasing the sampling or integration time τ:

Statistical variation = ±2√N

√τ

Barrier covered

Statistical fluctuation

in countrate Residual and

background radiation

BA082E05

Radiation

progressively

absorbed by product

Barrier free

Nmax

Nmin

Detection band

100

Display

Detector

Fig. 1.5:

Operating principle of FTG 671

radiometric level limit switch

Gammapilot FTG 671 Chapter 1: Introduction

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