FMG FMR 171 User Manual

FMR 171/241/260 QA Installation and Operation Instructions – Page 1 of 20
EN
Installation and Operation Instructions
Rotary Gas Meter Type FMR 171/241/260
WARNING
If there remain any questions or remarks after reading these instructions,
please contact the supplier of this product. Before installing the gas meter
the international, national, as well as local and company regulations related
to this product should be known.
A more extensive manual of this gas meter is available on request.
ENVIRONMENTAL CONDITIONS OF THE METER:
 Mechanical class M2 & Electromagnetic class E1
 Max. Operating temperature range from -40°C to +70°C.
 Meter can be installed in open air.
 Avoid direct sunshine on the meter.
 Minimal IP-classification of Index: IP54 (splash proof)
INSTRUCTIONS:
1) Check the meter for damage due to transportation and handling. The rotors should
rotate freely.
2) Check the flow direction, as indicated with an arrow on the Pm-
indication label on the meter. In case the flow direction is incorrect, this
can be changed to a reversed flow (horizontal, right to left) by turning
the index plate. For the positions of the Pressure and Temperature
connections see figure 4.
3) The piping on the inlet side of the meter must be clean (free of dirt, welding beads
and pipe scale). It is recommended to install a 100 micron filter upstream of the
meter. For new installations it is recommended to install a wire mesh screen (250
micron) for the first weeks of operation.
4) The meter must be installed free of piping stress.
5) Level the meter within 5mm/m side-to-side and front-to-back
6) TIGHTEN THE FLANGE BOLTS CROSSWISE AND REGULARLY (for the dimensions of the
flange bolts and the applied tightening torque on the different sizes see figure 3).
7) The meter is shipped with empty oil reservoir. Fill the oil reservoir at the front side of
the meter with the supplied oil to the indicated level (see figure 1). For a correct
 II 2 G T4

FMG FMR 171 Specifications

General

Number of channels	1
Housing material	Aluminum
Protection class	IP66
Power Supply	10.5-42 V DC
Operating Temperature	-40°C to +85°C

Summary

Installation and Initial Setup

Meter Inspection and Flow Direction

Check meter for damage, ensure free rotor movement, and verify/set flow direction.

Piping and Stress-Free Installation

Ensure clean inlet piping and install the meter stress-free and level.

Flange Bolt Tightening and Oil Filling

Tighten flange bolts correctly and fill the oil reservoir to the indicated level.

Operational and Safety Precautions

Handling, Transport, and Storage Precautions

Avoid mechanical shock, strong magnetic fields; transport/store with rotor axis horizontal.

Maintenance and Security Precautions

Depressurize for oil work, drain oil before removal, seal plugs and sight glasses.

Index and Drive Unit Information

Universal Index Details

Standard version with two 8-digit mechanical roller indexes, adjustable position.

Basic Index and Instrument Drive

Simplified index for one flow direction; standalone unit for mechanical input.

Rotating the Index Mechanism

Instructions on how to rotate the Universal index or instrument drive.

Sensor Assemblies

Sensor Installation and Service

Guidelines for sensor installation, commissioning, and service procedures.

3700 Reed Assy Overview

Details on the 3700 Reed Assy for pulse outputs and tamper status.

3710 MSR Assy Overview

Details on the 3710 MSR Assy for pulse outputs and tamper status.

3720 Wiegand Assy Overview

Details on the 3720 Wiegand Assy for pulse outputs and tamper status.

4000 HF Sensor Assembly

Introduction to 4000 HF Sensor

Details on the 4000 HF Sensor Assy for dual high frequency pulse output.

ATEX Use for HF Sensor

Information on ATEX directive compliance and use in explosive atmospheres.