SM-6, SM-6-V, S-SM 3-1
1 Introduction
This quick guide will assist you in starting up the unit. Follow
the safety notices or injury to health or property damage may
occur. Carefully read the original operating instructions in-
cluding information on maintenance and troubleshooting
prior to startup. These are located on the included CD and on-
line at
Please direct any questions to:
Bühler Technologies GmbH
Harkortstraße 29
40880 Ratingen
Germany
Tel.: +49 (0) 21 02 / 49 89-0
Fax: +49 (0) 21 02 / 49 89-20
These operating instructions are a part of the equipment. The
manufacturer reserves the right to change performance-, spe-
cification- or technical data without prior notice. Please keep
these instructions for future reference.
1.1 Intended use
The flow meter can be used to display flow rates of gases and
liquids.
• You can get the probe type from the type plate. There is
the order number and also a part number and type mark-
ing.
• If there are special instructions for a certain type, they are
described in the manual on the attached CD. Regard the
specific limits of the flow meters. Please only order the
spare parts matching the probe type.
Flow meters type SM-6/SM-6-V can be equipped with a bi-
stable flow sensor. With SM-6-V the flow maybe adjusted by a
needle valve.
• The safety flow meters S-SM consist of the metering glass
inside a sealed protection glass. Thus if the metering glass
would break, no gas or liquid would pour out. The protec-
tion glass itself sits inside a stainless steel shell giving
outside protection.
• The different types can be seen from the attached data
sheet on the CD.
NOTICE
When used in explosive areas
Model SM-6, SM6-V and S-SM 3-1 flow meters meet the funda-
mental safety requirements of Directive 2014/34/EU and are
therefore suitable for use in Zone 1 Ex areas (model S-SM 3-1:
explosion group IIC; model SM-6, SM-6-V: explosion group
IIB); hazard notes must be observed). The flow meter can be
used to transport non-flammable gases and flammable gases
explosion group IIB (model SM-6 and SM-6-V) or IIC (model S-
SM 3-1) which may occasionally be explosive during normal
operation (Zone 1). The type plate on the flow meters has no
Ex classification, as the mediums have no own ignition
sources and therefore do not fall under Directive 2014/34/EU.
1.2 Contents
• 1 x Flow meter
• 1 x Product documentation
• 1 x Bracket (Model SM-6 / SM-6-V only)
2 Safety instructions
The equipment must be installed by a professional familiar
with the safety requirements and risks.
Be sure to observe the safety regulations and generally applic-
able rules of technology relevant for the installation site. Pre-
vent malfunctions and avoid personal injuries and property
damage.
The operator of the system must ensure:
• Safety notices and operating instructions are available
and observed,
• The respective national accident prevention regulations
are observed,
• The permissible data and operational conditions are
maintained,
• Safety guards are used and mandatory maintenance is
performed,
• Legal regulations are observed during disposal,
• compliance with national installation regulations.
DANGER
Toxic, acidic gasses
Sample gas can be harmful.
a) Switch off the gas supply before performing mainten-
ance and, if necessary, flush the gas lines with air.
b) If necessary, ensure a safe gas discharge.
c) Protect yourself from toxic / acidic gasses when perform-
ing maintenance. Wear appropriate protective equip-
ment.
DANGER
Application in explosive atmosphere
Combustible gases and dust may inflame or explode. Avoid
the following hazardous situations:
Electrostatic charge (spark formation)!
Clean plastic parts and labels with damp cloth only.
Connect metallic housings to ground!
Maximum surface temperature!
The maximum surface temperature T
surf
of the equipment
corresponds to the medium-temperature T
med
; T
surf
≤ T
med
.
Ignition temperature!
Regard the ignition temperature of the explosive gas-atmo-
sphere as well as maximum allowable surface temperatures
(regard directive 94/9/ EC and harmonized standards).
Risk of breakage / emission of explosive or toxic gas possible.
Protect the equipment against being hit.
Gas leakage!
Life and explosion risk may result from gas leakage due to im-
proper use or during maintenance.
5
Bühler Technologies GmbH
BX400001 ◦ 12/2019
