WIKA 111.11 - Manual (Page 2)

Sealing in the
thread 
Spanner flats
Sealing face 
Correct sealing of pressure gauge connections with parallel threads  must be made using
suitable flat gaskets, sealing rings or WIKA profile sealings. The sealing of tapered threads
(e.g. NPT threads) is made by providing the thread  with additional sealing material such
as, for example, PTFE tape (EN 837-2).
The torque depends on the seal used. Connecting the gauge using a clamp socket or a
union nut is recommended, so that it is easier to orientate the gauge correctly.
When a blow-out device is fitted to a pressure gauge, it must be protected against being
blocked by debris and dirt.
After mounting, set the compensating valve (if available) from CLOSE
to OPEN.
Temperature effect
When the temperature of the measuring system deviates from the reference temperature
(+20 °C):
max. ±0.4%/10 K of full scale value
Ingress protection per EN 60529 / IEC 529
Model 111.xx: IP 42
Models 113.53, 213.40 and 213.53: IP 65
Permissible temperatures
Ambient:
Model 111.xx: -40 ... +60 °C
Models 113.53, 213.40 and 213.53: -20 ... +60 °C
Medium: max. +60 °C
Attention! With gaseous substances, the temperature may increase as a result of
compression warming. In these cases it may be necessary to throttle the rate of change
of pressure or reduce the permissible medium temperature.
The effective maximum surface temperature is not only dependant upon these instruments,
but mainly on the respective medium temperature!
Materials
Wetted parts: Cu-alloy
Movement:
Cu-alloy
Dial: NS 40, 50, 63: Plastic
NS 80, 100, 160: Aluminium
Pointer: Plastic (NS 160: Aluminium)
Case: Models 111.10, 111.12, 111.16: Plastic
Model 111.11: Steel
Models 113.53, 213.53: Stainless steel
Model 213.40: Forged brass
Window: Plastic (NS 160: Instrument glass)
Installation
■ Nominal position per EN 837-1 / 9.6.7 Figure 9: 90° ( ⊥ )
■ Process connection lower mount (LM) or back mount (BM)
■ In order to avoid any additional heating, the instruments must not be exposed to direct
solar irradiation while in operation!
■ Pressure gauges must be earthed via the process connection!
Permissible ambient and operating temperatures
When mounting the pressure gauge it must be ensured that, taking into consideration the
influence of convection and heat radiation, no deviation above or below the permissible
ambient and medium temperatures can occur. The influence of temperature on the
indication accuracy must be observed.