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計測機器 Barksdale BNA 21のPDF 取扱説明書をオンラインで閲覧またはダウンロードできます。Barksdale BNA 21 7 ページ。 Bypass level indicator
ページを印刷するIntended Applications
The Bypass Level Indicator (BNA) serves exclusively for indicating the level corresponding to that of
the connected tank. Control devices such as solenoid switches or remote indicators can be
additionally installed by Barksdale.
The manufacturer assumes the responsibility for correct execution of the equipment according to
the orderer's instructions. The orderer assumes the responsibility for the correct installation and use
of the equipment subject to the applicable national regulations.
DANGER
Read the operating instructions and the safety instructions carefully before using the Bypass
Level Indicator. Nonobservance may cause injuries to health or material damage.
Barksdale GmbH cannot be held liable for any damage resulting from incorrect use.
The Bypass Level Indicators (BNA) must not be used in situations in which lives depend on
proper functioning of the equipment.
The Bypass Level Indicator may only be used in the specified fields of application and with the
permissible data (see nameplate). The temperature ranges must be within the permissible limits.
The stated pressures and electrical load values must not be exceeded.
The orderer ensures that exothermic reactions or spontaneous gas-phase formation of the
medium are impossible.
Observe also the applicable national safety instructions for assembly, commissioning and
operation of the Bypass Level Indicator.
CAUTION
If the medium is water and there is a risk of icing the water must be discharged from the Bypass
Level Indicator (BNA) or heating must be provided to prevent damage to the float or the indicator
tube.
The maximum speed of the float caused by level changes must not exceed 1 m/s. If necessary a
suitable screen must be installed by the orderer in the connection to the tank.
NOTE
Unless agreed otherwise the Bypass Level Indicator (BNA) is designed for static operating
conditions. If any vibrations are to be expected, e.g. by pumps, compressors etc. the orderer
must provide for adequate vibration absorption.
The classification of ex devices is stated on the nameplate and the EC type examination certificate.
The designation
II 1G Ex h IIC T6...T1 Ga permits use in potentially explosive gas atmosphere
outside the equipment in zone 0. Inside the equipment zone 0 is also permitted.
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CAUTION
In ex areas the orderer must not use any plastic bypass level indicators (BNA) because
of the risk of electrostatic charging.
If the Bypass Level Indicator (BNA) is determined for use in potentially explosive
atmosphere, it must be checked whether the damper has been installed in the lower
flange. The BNA must be suitable for the intended use according to its nameplate.
In case of use in zone 0, the maximum process temperatures according to the
temperature class and the permissible pressure range in the tank of 0.8 to 1.1 bar
absolute in case of potentially explosive temperature must be observed. If the Bypass
Level Indicator (BNA) is used in a potentially explosive atmosphere outside the
permissible pressure range and temperature range in the tank mentioned above, the type
examination certificate serves only as a guideline.
Additional examinations for the specific operating conditions are recommended.
Safety Instructions
The safety instructions are intended to protect the user from dangerous situations and/or prevent
material damage.
In the operating instructions the seriousness of the potential risk is designated by the following
signal words:
DANGER
Refers to imminent danger to men.
Nonobservance may result in fatal injuries.
WARNING
Refers to a recognizable danger.
Nonobservance may result in fatal injuries, and destroy the equipment or plant parts.
CAUTION
Refers to a danger.
Nonobservance may result in minor injury and damage to the Bypass Level Indicator (BNA)
and/or the plant.
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