Endress+Hauser FHG65 User manual

Products Solutions Services
Operating Instructions
Gamma Modulator FHG65
Synchronizer FHG66
Radiometric measuring technology
BA00373F/00/EN/17.22-00
71566679
2022-03-18

Gamma Modulator FHG65 Synchronizer FHG66
2 Endress+Hauser
Order code:
Ext. ord. cd.:
Ser. no.:
www.endress.com/deviceviewer Endress+Hauser
Operations App
XXXXXXXXXXXX
XXXXX-XXXXXX
XXX.XXXX.XX
Serial number
1.
3.
2.
A0023555

Gamma Modulator FHG65 Synchronizer FHG66 Table of contents
Endress+Hauser 3
Table of contents
1 System requirements ............... 5
1.1 System requirements of FMG50 ............ 5
1.2 System requirements of FMG60 ............ 5
2 About this document ................ 6
2.1 Symbols used .......................... 6
2.1.1 Safety symbols .................. 6
2.1.2 Symbols for
certain types of information and graphics 6
2.2 Documentation ........................ 7
3 Basic safety instructions ............ 8
3.1 Requirements for personnel ............... 8
3.2 Intended use .......................... 8
3.3 Installation, commissioning and operation .... 8
3.4 Hazardous area ........................ 8
3.5 Radiation protection .................... 9
3.5.1 Basic radiation protection guidelines .. 9
3.6 Workplace safety ...................... 10
3.7 Operational safety ..................... 10
4 Product description ................ 12
4.1 Product design ........................ 12
4.1.1 Components of the FHG65 ......... 12
4.2 FHG65 nameplate ..................... 13
4.3 Scope of delivery ...................... 13
4.3.1 Accompanying documentation ...... 13
5 Mounting ......................... 14
5.1 Incoming acceptance, product identification,
transport, storage ..................... 14
5.1.1 Incoming acceptance ............. 14
5.1.2 Product identification ............ 14
5.1.3 Manufacturer address ............ 14
5.1.4 Transporting to the measuring point .14
5.1.5 Storage ....................... 14
5.2 Dimensions of the Gamma Modulator ....... 15
5.2.1 Example of mounting with angle
bracket (supplied by customer) ..... 16
5.3 Weight ............................. 16
5.4 Installation requirements ................ 16
5.4.1 Safety instructions ............... 16
5.4.2 Gamma Modulator FHG65 ......... 17
5.4.3 General installation conditions ...... 17
5.4.4 Mounting multiple Gamma
Modulators FHG65 .............. 18
5.4.5 Water cooling .................. 19
5.5 Post-installation check .................. 20
6 Electrical connection .............. 21
6.1 Potential equalization .................. 21
6.2 Cable entries ......................... 21
6.3 Terminal assignment ................... 22
6.4 Alarm output ......................... 22
6.5 Post-connection check .................. 23
7 Commissioning .................... 24
7.1 Configuring the beam type on the FMG50/
FMG60 ............................. 24
7.2 Recalibration ......................... 24
8 Maintenance and repair ........... 25
8.1 Maintenance ......................... 25
8.2 Cleaning ............................ 25
8.3 Repair .............................. 25
8.3.1 Repair concept ................. 25
8.3.2 Repairs to devices with an Ex-
certificate ..................... 25
8.4 Return .............................. 25
8.5 Spare parts .......................... 25
8.6 Disposing of the device .................. 26
8.6.1 WEEE Directive 2012/19/EU ...... 26
8.7 Contact addresses at Endress+Hauser ....... 26
9 Technical data .................... 27
9.1 Additional technical data ................ 27
9.2 Supplementary documentation ............ 27
9.2.1 Gamma Modulator FHG65;
Synchronizer FHG66 ............. 27
9.2.2 Gammapilot FMG50 ............. 27
9.2.3 Gammapilot M FMG60 ........... 27
9.2.4 Source container FQG61, FQG62 .... 27
9.2.5 Radiation source FSG60, FSG61 ..... 27
9.2.6 Other documentation ............ 28
10 Accessories ....................... 29
10.1 Synchronizer FHG66 ................... 29
10.1.1 FHG66 identification ............. 29
10.1.2 Use of the FHG66 ............... 29
10.1.3 Technical data .................. 32
10.1.4 Electrical connection ............. 33
10.1.5 Installation requirements ......... 34
10.1.6 Mechanical construction .......... 35
10.1.7 Human interface ................ 35
10.1.8 Ordering information ............ 37
11 Certificates and approvals ......... 38
11.1 CE mark ............................ 38
11.2 Explosion protection ................... 38
11.3 Additional approvals ................... 38
11.4 Overfill protection ..................... 38
11.5 Other standards and guidelines ........... 38

Table of contents Gamma Modulator FHG65 Synchronizer FHG66
4 Endress+Hauser
12 Supplementary documentation ..... 39
12.1 Gamma Modulator FHG65; Synchronizer
FHG66 ............................. 39
12.2 Gammapilot FMG50 ................... 39
12.3 Gammapilot M FMG60 ................. 39
12.4 Source container FQG61, FQG62 .......... 39
12.5 Radiation source FSG60, FSG61 ........... 39
12.6 Other documentation ................... 40

Gamma Modulator FHG65 Synchronizer FHG66 System requirements
Endress+Hauser 5
1 System requirements
1.1 System requirements of FMG50
All versions of the Gammapilot FMG50 can evaluate the signal generated by the Gamma
Modulator FHG65
1.2 System requirements of FMG60
To be able to evaluate the signal generated by the Gamma Modulator FHG65, the
Gammapilot M FMG60 must be equipped with the following software at least:
• HART electronics
• For SIL devices with short point level detectors (200 mm and 400 mm): SW 01.02.02
or higher
• For all other devices: SW 01.03.02 or higher
• PROFIBUS PA electronics
SW 01.03.02 or higher
• FOUNDATION Fieldbus electronics
SW 01.03.02 or higher

About this document Gamma Modulator FHG65 Synchronizer FHG66
6 Endress+Hauser
2 About this document
2.1 Symbols used
2.1.1 Safety symbols
CAUTION
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in
minor or medium injury.
DANGER
This symbol alerts you to a dangerous situation. Failure to avoid this situation will result in
serious or fatal injury.
NOTICE
This symbol contains information on procedures and other facts which do not result in
personal injury.
WARNING
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in
serious or fatal injury.
2.1.2 Symbols for certain types of information and graphics
Warns against radioactive substances or ionizing radiation
Permitted
Procedures, processes or actions that are permitted
Preferred
Procedures, processes or actions that are preferred
Forbidden
Procedures, processes or actions that are forbidden
Tip
Indicates additional information
Reference to documentation
A
Reference to page
Reference to graphic
Notice or individual step to be observed
1.
,
2.
,
3.
Series of steps
Result of a step
Operation via local display

Gamma Modulator FHG65 Synchronizer FHG66 About this document
Endress+Hauser 7
Operation via operating tool
Write-protected parameter
1, 2, 3, ...
Item numbers
A, B, C, ...
Views
Safety instructions
Observe the safety instructions contained in the associated Operating Instructions
2.2 Documentation
The necessary documentation is available in the Download Area of the Endress+Hauser
website (www.endress.com/downloads).
For an overview of the scope of the associated Technical Documentation, refer to the
following:
•W@M Device Viewer (www.endress.com/deviceviewer): Enter the serial number
from nameplate
•Endress+Hauser Operations App: Enter the serial number from the nameplate or
scan the 2D matrix code (QR code) on the nameplate

Basic safety instructions Gamma Modulator FHG65 Synchronizer FHG66
8 Endress+Hauser
3 Basic safety instructions
3.1 Requirements for personnel
The personnel for installation, commissioning, diagnostics and maintenance must fulfill
the following requirements:
• Trained, qualified specialists must have a relevant qualification for this specific function
and task
• Are authorized by the plant owner/operator
• Are familiar with federal/national regulations
• Before beginning work, the specialist staff must have read and understood the
instructions in the Operating Instructions and supplementary documentation as well as
in the certificates (depending on the application)
• Following instructions and basic conditions
The operating personnel must fulfill the following requirements:
• Being instructed and authorized according to the requirements of the task by the
facility's owner-operator
• Following the instructions in these Operating Instructions
3.2 Intended use
The Gamma Modulator FHG65 is used to optimize the measuring signal during
radiometric level measurement, point level measurement, density measurement and
concentration measurement. The Synchronizer FHG66 is used to synchronize multiple
Gamma Modulators FHG65 that are used together in a measuring point. The operational
safety of the measuring device can be suspended as a result of incorrect use or use other
than that intended. The manufacturer accepts no liability for any damage arising as a
result.
3.3 Installation, commissioning and operation
The measuring system is designed to meet state-of-the-art safety requirements and
complies with applicable standards and EU regulations. However, if it is used improperly or
for applications for which it is not intended, application-related hazards may arise, e.g.
product overflow due to incorrect installation or configuration.
Installation, electrical connection, commissioning, operation and maintenance of the
measuring system must be carried out exclusively by trained specialists authorized to
perform such work by the system operator.
Technical personnel must have read and understood these Operating Instructions and
must adhere to them.
Modifications and repairs to the measuring system may only be carried out if they are
expressly permitted in the Operating Instructions.
3.4 Hazardous area
If the measuring system is used in hazardous areas, the corresponding national standards
and regulations must be observed. The device is accompanied by separate "Ex
documentation", which is an integral part of these Operating Instructions. The installation
specifications, connection values and safety instructions listed in this supplementary
documentation must be observed.
• Technical personnel must be qualified and trained for the hazardous area.
• Comply with the metrological and safety-related requirements for the measuring point.

Gamma Modulator FHG65 Synchronizer FHG66 Basic safety instructions
Endress+Hauser 9
LWARNING
‣Observe the safety instructions associated with the device. These instructions depend
on the certificate ordered.
3.5 Radiation protection
The Modulator FHG65 is not a source of ionizing radiation.
When working with radiation sources, the following instructions must be observed:
3.5.1 Basic radiation protection guidelines
LWARNING
‣When working with radiation sources, all unnecessary radiation exposure must be
avoided. Keep all unavoidable radiation exposure to a minimum. Three basic concepts
apply to achieve this:
ABC
A0016373
A Shielding
B Time
C Distance
LCAUTION
‣When working with source containers, all the instructions for mounting and usage
outlined in the following documents must be observed:
Source container documentation
•FQG61/FQG62:
TI00435F
•FQG66:
• TI01171F
• BA01327F
Shielding
Ensure the best possible shielding between the radiation source and yourself and all other
persons. Effective shielding is provided by source containers (FQG61,FQG62, FQG66) and
all high-density materials (lead, iron, concrete).
Time
Remain as short as possible in the area exposed to radiation.
Distance
Keep as far away from the radiation source as possible. The radiation intensity decreases
in proportion to the square of the distance from the radiation source.

Basic safety instructions Gamma Modulator FHG65 Synchronizer FHG66
10 Endress+Hauser
Legal regulations for radiation protection
The handling of radiation sources is legally controlled. The radiation protection regulations
of the country in which the plant is operated are of overriding importance and must be
strictly observed. In the Federal Republic of Germany, the current version of the Radiation
Protection Ordinance applies. The following points derived from this Ordinance are
particularly important for radiometric measurement:
Handling permit
A handling permit is required for operating a plant which uses gamma radiation. Permit
applications are made to the local state government or the authority responsible (State
Offices for Environmental Protection, Trade Inspection Offices, etc.). The Endress+Hauser
sales organization will be happy to help you obtain the handling permit.
Radiation safety officer
The plant operator must appoint a radiation safety officer (RSO) who has the necessary
specialist knowledge and who is responsible for observing the Radiation Protection
Ordinance and all radiation protection procedures. Endress+Hauser offers training courses
in which individuals can acquire the necessary specialist knowledge.
Controlled area
Only persons who are exposed to radiation during the course of their job and are subject to
official personal dose monitoring procedures may work in controlled areas (i.e. areas
where the local dose rate exceeds a specific value). The limit values for the controlled area
are specified in the current Radiation Protection Ordinance. The Endress+Hauser sales
organization will be pleased to provide further information on radiation protection and
regulations in other countries.
3.6 Workplace safety
For work on and with the device:
‣Wear the required personal protective equipment according to federal/national
regulations.
‣Switch off the supply voltage before connecting the device.
3.7 Operational safety
Risk of injury!
‣Operate the device only if it is in proper technical condition, free from errors and faults.
‣The operator is responsible for interference-free operation of the device.
Modifications to the device
Unauthorized modifications to the device are not permitted and can lead to unforeseeable
dangers:
‣If modifications are nevertheless required, consult with the manufacturer.
Repair
To ensure continued operational safety and reliability:
‣Carry out repairs on the device only if they are expressly permitted.
‣Observe federal/national regulations pertaining to the repair of an electrical device.
‣Use only original spare parts and accessories from the manufacturer.

Gamma Modulator FHG65 Synchronizer FHG66 Basic safety instructions
Endress+Hauser 11
Hazardous area
To eliminate danger to persons or the facility when the device is used in the hazardous
area (e.g. explosion protection):
‣Check the nameplate to verify if the device ordered can be put to its intended use in the
hazardous area.
‣Observe the specifications in the separate supplementary documentation that is an
integral part of these instructions.

Product description Gamma Modulator FHG65 Synchronizer FHG66
12 Endress+Hauser
4 Product description
4.1 Product design
4.1.1 Components of the FHG65
1
1
1
1
1
4
5
6
7
3
2
2
2
8
8
10
9
A0018555
 1 Gamma Modulator FHG65
1 Housing
2 Ground connection
3 Screws
4 O-ring
5 Cable entry with seal
6 Nameplate and dowel pin
7 Water cooling jacket
8 Coolant connection
9 O-ring
10 Cover clamp

Gamma Modulator FHG65 Synchronizer FHG66 Product description
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4.2 FHG65 nameplate
1
2
3
4
5
6
7
8
8
8
9
10
11 12
A0048655
1 Manufacturer-specific data and device name
2 Order code
3 Serial number (Ser. no.)
4 Synchronization connection
5 Supply voltage and power consumption
6 Cable entries
7 Necessary temperature resistance of the connection cables
8 Certificate- and approval-related data
9 Degree of protection
10 Permitted ambient temperature range
11 Reference to additional, safety-related documentation
12 Date
4.3 Scope of delivery
• Gamma Modulator FHG65
• Accessories as ordered
4.3.1 Accompanying documentation
• Operating Instructions
• The Operating Instructions describe how to install and commission the Gamma
Modulator FHG65
BA00373

Mounting Gamma Modulator FHG65 Synchronizer FHG66
14 Endress+Hauser
5 Mounting
5.1 Incoming acceptance, product identification,
transport, storage
5.1.1 Incoming acceptance
Check the following during incoming acceptance:
 Are the order codes on the delivery note and the product sticker identical?
 Are the goods undamaged?
 Do the nameplate data match the ordering information on the delivery note?
 If required (see nameplate): Are the safety instructions (XA) provided?
If one of these conditions is not met, please contact the manufacturer's sales office.
5.1.2 Product identification
The device can be identified in the following ways:
• Nameplate specifications
• Extended order code with breakdown of the device features on the delivery note
‣Enter serial number from nameplates in W@M Device Viewer
(www.endress.com/deviceviewer)
 All of the information on the measuring device and on the scope of the technical
documentation pertaining to the device is displayed.
‣Enter the serial number from the nameplate in the Endress+Hauser Operations app or
scan the 2-D matrix code on the nameplate with the camera
 All of the information on the measuring device and on the scope of the technical
documentation pertaining to the device is displayed.
5.1.3 Manufacturer address
Endress+Hauser SE+Co. KG
Hauptstraße 1
79689 Maulburg, Germany
Place of manufacture: See nameplate.
5.1.4 Transporting to the measuring point
LCAUTION
Risk of injury
‣Follow the safety instructions and transport conditions for devices weighing more than
18 kg (39.69 lb).
5.1.5 Storage
Pack the device so that it is protected against impact for storage and transport. The
original packaging provides optimum protection.
Permitted storage temperature (without water in the water cooling jacket):
–40 to +75 °C (–40 to +167 °F)

Gamma Modulator FHG65 Synchronizer FHG66 Mounting
Endress+Hauser 15
5.2 Dimensions of the Gamma Modulator
161 (6.34)
161 (6.34)
532 (20.9)
560 (22.0)
142 (5.59)
142 (5.59)
172 (6.77)
172 (6.77)
572 (22.5)
144 (5.67)
144 (5.67)
495 (19.5)
524 (20.6)
537 (21.1)
A
B
81 (3.19)
81 (3.19)
A0018530
 2 Engineering unit: mm (in)
A Ex de - version (left: without water cooling jacket; right: with water cooling jacket)
B Ex d, Ex t, non-Ex - version (left: without water cooling jacket; right: with water cooling jacket)

Mounting Gamma Modulator FHG65 Synchronizer FHG66
16 Endress+Hauser
5.2.1 Example of mounting with angle bracket (supplied by
customer)
19.1 (0.75)
176 (6.93)
≥80 (3.15)
72.9 (2.87)
A0018531
 3 L-angle bracket; engineering unit: mm (in)
5.3 Weight
• Weight without water cooling jacket: max. 18 kg (39.69 lb)
• Weight with water cooling jacket (empty): max. 21 kg (46.31 lb)
• Weight with water cooling jacket (full): max. 25 kg (55.13 lb)
5.4 Installation requirements
5.4.1 Safety instructions
LWARNING
Even when the source container is closed, it is possible that the Modulator FHG65 is
in the controlled area for ionizing radiation.
‣In this case, the Modulator FHG65 must be cordoned off and made inaccessible.
For this reason, observe the following sequence of steps when mounting the modulator
and source container:
1. Mount the Gamma Modulator FHG65 on the tank or pipe
2. Establish the electrical connection of the Gamma Modulator
3. If a water cooling jacket is provided:
 Connect the water supply
4. Mount the source container on the modulator and cordon it off

Gamma Modulator FHG65 Synchronizer FHG66 Mounting
Endress+Hauser 17
5. LCAUTION
‣All other work, such as servicing and replacement of the modulator, may only be
carried out by staff whose radiation exposure is monitored in accordance with the
existing handling permit and the existing license or the relevant Radiation
Protection Ordinance. For details, please contact your radiation safety officer.
Switch on the modulator(s).
6. Measure and cordon off controlled areas.
LCAUTION
‣When measuring the local dose rate to determine the controlled areas, the modulator
must be running and the measuring time selected must be long enough for a stable
measured value to be displayed.
5.4.2 Gamma Modulator FHG65
In a radiometric measuring point, the Gamma Modulator FHG65 is mounted in front of the
beam exit channel of the source container. It contains a shaft slotted along the
longitudinal axis. This shaft rotates continuously and alternately screens off, or allows
through, the useful beam at a frequency of 1 Hz. Due to this frequency, the useful beam
differs from fluctuating ambient interference radiation and from interference radiation
occurring sporadically (e.g. from nondestructive material testing). Using a frequency filter,
the FMG50 or FMG60 can thus separate the useful signal from interference radiation. In
this way, it is possible to continue measuring even if interference radiation occurs. This
significantly increases the measuring certainty and system availability.
3
4
1
2
A0018245
1 Interference radiation
2 FMG50/FMG60
3 FHG65
4 FQG61/FQG62
The Gamma Modulator FHG65 and the Gammapilot FMG50/FMG60 are not
interconnected electrically. When adjusting the FMG50/FMG60, the "beam type"
parameter must be set to "modulated".
5.4.3 General installation conditions
The Gamma Modulator FHG65 is mounted directly on the mounting flange of the source
container FQG61 or FQG62. 1)
1) For applications with the source container FQG66: contact your local Endress+Hauser sales office

Mounting Gamma Modulator FHG65 Synchronizer FHG66
18 Endress+Hauser
LCAUTION
‣As the beam exit channel is not located in the middle of the source container, it is
absolutely essential to ensure the device is oriented correctly when mounting. The
arrow on the mounting plate of the Gamma Modulator must point in the direction of
the transporting lug of the source container. Measurement is not possible otherwise.
A0018532
• The source container with the Gamma Modulator must be mounted as close as possible
to the tank or measuring tube
• The unit must be mounted on a low-vibration construction
• Fasten with at least 4 M16 threaded bolts; torque:
• Steel: 210 Nm (154.88 lbf ft)
• Stainless steel: 144 Nm (106.20 lbf ft)
• When mounting, consider the total weight consisting of the source container and the
Gamma Modulator FHG65. Ensure sufficient stability is guaranteed. Provide an
additional support if necessary
• After mounting, measure the local dose rate in the vicinity of the source container and
the Gamma Modulator. Cordon off any controlled areas, see also TI00435F (FQG61/
FQG62)
• The use of the modulator reduces the effectively useful horizontal angle of the beam
path from 6 ° to approx. 2 °. Check that the detector is completely covered by the
radiation beam!
5.4.4 Mounting multiple Gamma Modulators FHG65
If multiple Gamma Modulators FHG65 are used in a measuring point, they must operate
synchronously. The Synchronizer FHG66 is used for this purpose.
The synchronization requires that all the Gamma Modulators FHG65 be aligned in the
same way. A mark is provided at the top of the Gamma Modulator FHG65 to align the
units. This mark must be aligned in the same way relative to the source container on
all the Gamma Modulators FHG65 used.

Gamma Modulator FHG65 Synchronizer FHG66 Mounting
Endress+Hauser 19
1
2
1
2
A0018533
1 Marking for aligning multiple Gamma Modulators
2 FHG65
5.4.5 Water cooling
The following applies to the Gamma Modulator FMG60 version with water cooling:
• Material: 316L and 304
• Water connection: 2 x G 1/4"A, DIN ISO 228
• Outlet temperature: max. +40 °C (104 °F); temperature monitoring is recommended
• Water pressure: 4 to 6 bar (58 to 87 psi)
• Water flow: min. 60 l/h
• Drain sensor with water cooling jacket in the event of frost or protect against freezing.
LWARNING
Pressurized water cooling system!
‣Do not open the cylinder screws (see diagram below) when pressurized
1
A0023367
 4 Application with water cooling
1 Cylinder screws
LWARNING
Falling source containers can cause injury
‣Always remove the source container before loosening the fixing screws of the
modulator. Observe the safety instructions for radiation protection!

Mounting Gamma Modulator FHG65 Synchronizer FHG66
20 Endress+Hauser
LCAUTION
Detector or cooling jacket can become damaged if the cooling water freezes
‣Empty cooling jacket or protect against freezing
1
1
22
A0018535
1 FQG61, FQG62
2 FHG65
LCAUTION
‣The water must always be introduced from the bottom to ensure that the water cooling
jacket is completely filled.
5.5 Post-installation check
After installing the device, carry out the following checks:
 Is the Gamma Modulator FHG65 mounted securely on the vessel and source
container? ?
 Does the arrow on the mounting plate of the Gamma Modulator point in the direction of
the transporting lug of the source container?
 Are the source container and the Gamma Modulator FHG65 securely mounted on a low-
vibration console that can safely bear the total weight of the source container and the
Gamma Modulator under all conditions that can be expected?
 Has the local dose rate been measured in the vicinity of the source container and
Gamma Modulator FHG65 and have controlled areas (if present) been cordoned off?
 Is the device undamaged (visual inspection)?
 Does the device match the measuring point specifications (ambient temperature,
measuring range etc.)?
 If available: are the measuring point number and labeling correct (visual inspection)?
 Is the measuring device sufficiently protected against sunlight?
 Are the cable glands tightened correctly?
If multiple Gamma Modulators are deployed at one measuring point:
 Are all the Gamma Modulators aligned the same (check marking)?
 Are all the Gamma Modulators connected to one synchronizer (or to a cascaded
synchronizer)?
 Is the synchronizer configured correctly -> is the green LED lit?