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2.5.2  IECEx certificate of conformity
The BTLs have been certified under certificate number 
IECEx SIR 11.0048X. The current issue of the certificate 
and further information can be found in the “Certified 
Equipment Scheme” section at www.iecex.com.
The certificate number is indicated on the part label.
2.5.3  Special conditions (“X” symbol)
The “X” symbol indicates special conditions that must be 
noted for safe operation:
–  The permissible ambient temperature is limited to 
–50°C…+80°C.
–  The certification of this equipment relies upon the 
following materials used in its construction:
–  Flange – stainless steel
–  Cover – stainless steel
–  O-ring
If the equipment is likely to come into contact with 
aggressive substances, then it is the responsibility of 
the user to take suitable precautions that prevent it 
from being adversely affected, thus ensuring that the 
type of protection featured by the equipment is not 
compromised.
Aggressive substances: e.g. acidic liquids or gases that 
may attack metals, or solvents that may affect 
polymeric materials.
Suitable precautions: e.g. regular checks as part of 
routine inspections or establishing from the material’s 
data sheets that it is resistant to specific chemicals.
–  The picture of the product label in section 14.2 of this 
document has to be checked for appropriate markings, 
ratings, and manufacturer contact information.
2.5.4  Operator documents
Zone classification in the system is the responsibility of the 
operator and must be documented in an explosion 
protection document. This document must also contain 
the hazard analysis and assessment, proof of training, 
maintenance plans and other documents as required 
under Directive 1999/92/EC.
We expressly recommend including the user’s guide in the 
operator’s documentation. For safety reasons, it must be 
taken over completely and without any changes.
2
  EX safety notes (continued)
2.6  Assembly, installation, and setup
Assembly, installation, and setup of the BTL must not be 
done in an explosive atmosphere.
The mounting distance between the flanged joint and solid 
objects which are not part of the equipment must be at 
least 2mm.
The calibration box (Accessories) may only be installed 
during the adjustment phase and must be uninstalled 
before operating the BTL.
Protect the 
BTL 
from damage and wear. In addition to 
mechanical protection, this also includes precautions to 
prevent non-permissible operating conditions and damage 
due to environmental influences.
2.7  Maintenance, inspection, repair
The measuring principle used in this BTL is maintenance-
free and wear-free. The operator must regularly inspect the 
BTLs for signs of damage or malfunctions in line with the 
operating conditions and environmental influences. If any 
damage or wear is found, the BTL must be immediately 
taken out of operation.
Only Balluff service technicians may repair defective BTL. 
Intervention in the product by the operator is not permitted 
due to safety reasons.
A warning is included on the part label.
BTL7-A/C/E/G5_ _-M_ _ _ _-J-DEXC-TA12
Magnetostrictive Linear Position Sensor – Rod Style
Type of protection “db” and “ta”
Flameproof enclosure