Specifications - WIKA 821 Mode D'emploi

9. Specifications

9. Specifications
9.1 Operating conditions for models 821 and 851 per low voltage directive
The insulation values (air gaps and creepage distances) are sized for the fol-
lowing ambient conditions in accordance with EN 61010-1:2010:
EN
- Altitude up to 2,000 m
- Overvoltage category II
- Pollution degree 2
- Relative humidity 0 ... 95 % non-condensing (per DIN 40040)
The strength of the measuring instruments (enclosing non-metallic compo-
nents) was tested with a reduced impact energy of 2 J corresponding to IK07
per EN 61010-1:2010. The IK code is included on the respective product label.
The data for the operating temperature ranges and the IP ingress protec-
tion may vary, depending on the instrument model and version, and are also
included on the product label.
We recommend the following load values to ensure safe, continuous operation.
Limit values, recommended contact load for model 821
The limit values for the contact load of the model 821 magnetic snap-action
contact, for resistive loads, depend on various factors; such as measuring range,
number of switch contacts, instrument version without or with liquid filling.
Each instrument version therefore contains individual data on the product label:
U permissible switching voltage
I permissible switching current
P maximum switching power
max.
These data are included on the respective product label.
22 Operating instructions pressure gauges with switch contact models 821, 851 or 830 E
WARNING!
None of the limit values for voltage, current and power are to be
exceeded!