DIN 6653-2:2015-06

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
  4.1 Function and alarm set points
  4.2 Mechanical construction
  4.3 Indicating devices
  4.4 Fault signal
5 Normal test conditions
  5.1 General
  5.2 Test gases
  5.3 Application of test gases
  5.4 Supply voltage
  5.5 Ambient temperature
  5.6 Pressure
  5.7 Humidity
  5.8 Stabilisation time
  5.9 Orientation
6 Test methods and performance requirements
  6.1 Preparation of apparatus before testing
  6.2 Mask for calibrating diffusion-type apparatus
  6.3 Repeatability
  6.4 Calibration curve
  6.5 Long-term stability
  6.6 Alarm trigger
  6.7 Temperature
  6.8 Pressure
  6.9 Humidity
  6.10 Flow rate
  6.11 Pump performance and leak-tightness
       of the gas circuit
  6.12 Orientation
  6.13 Power supply variations
  6.14 Warm-up time
7 Operating instructions

Defines performance requirements and test methods for fixed electrical apparatus for the detection of carbon dioxide concentrations hazardous to health in the ambient atmosphere.