2.4 Limits of use of product
Parameter
Value
Relative humidity of air
At temperatures up to +30°C max. 80%
At temperatures up to +40°C max. 50%
non-condensing
Ambient temperature
+5
℃
to +40
℃
Mounting orientation
Arbitrary
Usage
Only in indoor areas
Installation altitude max.
2000 m MSL
Protection degree
IP40
Tbl. 5:
Permissible ambient conditions
2.5 Proper use
The gauge provides a vacuum measurement of gases within the range of
1 × 10
-4
bis 1000 hPa
.
The TPR 271 gauge is also suitable for corrosive gases and gas mixtures outside of their explosion lim-
its, if the substances in contact with these gases and gas mixtures cannot corrode.
Use the product according to its intended purpose
► Operate the gauge with a Pfeiffer Vacuum total pressure measuring and control unit or with an
evaluation unit provided by the customer.
► Install, operate and maintain the gauge exclusively as prescribed in these operating instructions.
► Observe the limits of use prescribed in the technical data.
► Observe the technical data.
2.6 Foreseeable improper use
Improper use of the product invalidates all warranty and liability claims. Any use that is counter to the
purpose of the product, whether intentional or unintentional, is regarded as improper use; in particular:
● Use outside the mechanical and electrical limits of use
● Use with corrosive or explosive media, if this is not explicitly permitted
● Use for the measurement of highly flammable or combustible gases mixed with an oxidizing agent
(e.g. atmospheric oxygen) within the explosion limits
● Use outdoors
● Use after technical changes (inside or outside on the product)
● Use with replacement or accessory parts that are not suitable or not approved
2.7 Responsibilities and warranty
Pfeiffer Vacuum shall assume no responsibilities and warranty if the operating company or a third party:
● disregards this document
● does not use the product for its intended purpose
● carries out any modifications to the product (conversions, changes, etc.) that are not listed in the
corresponding product documentation
● operates the product with accessories that are not listed in the corresponding product documenta-
tion
The operator is responsible for the process media used.
Safety
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