User Manual PolyGard
®
2 Sensors 2023-11 Page 5 | 40
1 General
For installation and operation of the device, it is essential to read the user manual and follow the
instructions contained therein. PolyGard
®
2 devices must be employed within the intended use.
Due to on-going product development, MSR-Electronic GmbH reserves the right to change specifica-
tions without notice. The information contained herein is based upon data considered to be accurate.
However, no guarantee or warranty is expressed or implied regarding the accuracy of these data.
1.1 Intended Use
The PolyGard
®
2 Sensors are designed for the measurement of combustible, toxic gases and oxygen
as well as of refrigerants.
The digital PolyGard
®
2 SC2 Sensor can only be operated in conjunction with the SB2, MSC2, MSB2
and WSB2 Boards of the PolyGard
®
2 series.
The analog PolyGard
®
2 MC2 sensor is operated with 24 V DC and outputs an analog 4–20 mA signal.
The MC2 can be used with all MSR Boards with analog input, e.g. PolyGard
®
2 Multi-Sensor-Controller
MSC2, or separately as stand-alone device.
The PolyGard
®
2 Sensors must not be used in potentially explosive atmospheres. The Sensor must
only be employed in areas within the environmental conditions as specified in the Technical Data.
1.2 Safety
The operating instructions must be carefully read, understood and followed by all persons who in-
stall, use, maintain and check the product. The product can only fulfil its intended functions if it is
installed, used, maintained, serviced and checked in accordance with the instructions provided by
MSR-Electronic GmbH.
1.3 Installers and Operators’ Responsibilities
It is the responsibility of the installer and operator to ensure that all PolyGard
®
2 equipment is in-
stalled and used in compliance with all national and local codes. The device must be checked for
correct installation and functionality by a qualified person before measurement operation is started.
In Germany, BGR 500 Chapter 2.33 must be applied for this purpose.
The PolyGard
®
2 devices are tested for function by the manufacturer before delivery. During com-
missioning, a documented functional test is also required. The installation should only be carried out
by trained installation technicians, taking into account the current safety procedures for control in-
stallations.
The required equipotential bonding connections (also e.g. secondary potential to ground) or ground-
ing measures are to be carried out according to the respective project regulations. It must be ensured
that no ground loops are created in order to avoid undesired interference in the measurement elec-
tronics.
It is necessary to follow all instructions as well as the user documentation.
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