APPENDIX A - SPECIFICATIONS
A.1.11 Calibration intervals
Cartridgedependent.ThereisnoroutinecalibrationoftheTransmitterUnitorCertiedSensor
electronics
.
A.2 CARTRIDGES
  TheCertiedSensorcanbettedwithanyoneofanumberof 
        interchangeable cartridges. Each replaceable cartridge contains a gas 
        sensing transducer and its calibration/manufacturing information. It is 
        possible to replace the cartridge without removing the power from the 
    CertiedSensor,eveninhazardousenvironments.
Threetypesofcartridgeareavailable:
  •  electrochemical cell
  •  catalytic (SG16 type)
  •  Oxygen