Endura APA592
pH / Redox (ORP) transmitter
Appendix A
OI/APA592–EN Rev. E
97
Appendix A
A.1 Permits and Certification
A.2 Temperature Compensation
The Endura APA592 transmitter has three types of temperature compensation options:
manual Nernstian.
automatic Nernstian with solution coefficient
The temperature effect on ORP sensors is negligible. The effect of temperature on pION sensors is difficult
to characterize, except for specific applications. Therefore, only the solution coefficient option can be used
to compensate for electrode and process changes with temperature.
Symbol
Description
Explosion-
proof
approval
The Ex label indicates a device that complies with the directive 94/9/EC
CE mark
The CE mark indicates that the device complies with the following directives and
their basic safety requirements:
CE mark on the name plate of transmitter
– EMC directive 2004/108/EC, Low Voltage directive 2006/95/EC,
ATEX directive 94/9/EC
For ignition-protection applications:
– Conforms with hazardous area directive 94/9/EC (ATEX 95)
By placing the CE mark on its devices, ABB declares its conformance with these
directives.
Table A.1 Permits and Certification
