WIKA 762.14 - Manual (Page 7)

WIKA Operating instructions pressure gauges Model 7 per ATEX 7
GB
2080284.06 10/2013 GB/D/F
Movement: Stainless steel
Dial and pointer: Aluminium
Case, bezel ring: Stainless steel
(Model 73x.31: with blow-out back)
Window: Laminated safety glass
Installation
„ Nominal position per EN 837-3 / 9.6.6 Figure 7: 90° ( ⊥ )
„ Process connection: lower mount (LM)
„ In order to ensure that, with Model 73x.31 pressure can be safely and
reliably vented through the case back, a distance of at least 25 mm must be
left free behind the case!
„ In order to avoid any additional heating, the instruments must not be
exposed to direct solar irradiation while in operation!
„ With filled versions the ventilating valve at the top of the case must be
opened prior to commissioning!
Permissible vibration load at the mounting point
„ The instruments should always be installed in locations free from vibration.
„ If necessary, it is possible to isolate the instrument from the mounting point
by installing a flexible connection line between the measuring point and the
pressure gauge and mounting the instrument on a suitable bracket.
„ If this is not possible, the following limit values must not be exceeded:
Dry gauges: Frequency range < 150 Hz
(Model 732) Acceleration < 0.7 g (7 m/s 2 )
Liquid-filled gauges: Frequency range < 150 Hz
(Model 733)
Acceleration < 4 g (40 m/s 2 )
The liquid filling must be checked on a regular basis.
The liquid level must not drop below 75 % of the gauge diameter.
3. Technical data and intended use