Instruction manual

4.0 PIPING SM425 INSTRUCTION MANUAL
- The probe is easily clogged if too much particulate is contained in the process gas such as in utility
boilers or concrete kilns. To clear the particulate, compressed air is injected during blow back. Installation
of blow back piping is shown in Section 1.20.1.
4.2.1 Piping Parts for System 2
Verify the parts listed in Table 4-2 are ready.
Table 4-2 System 2 required piping parts
4.2.2 Piping for the Calibration Gas
This piping is to be installed between the zero-gas cylinder and the ZA8F flow setting unit. Also between
the ZA8F flow setting unit and the SM425P detector.
The cylinder should be placed in an enclosure such as a calibration unit case to minimize the effects of
sunlight and radiant heat and keep the cylinder temperature at 40°C or less. Mount a regulator valve
(specified by Teledyne Monitor Labs) on the cylinder.
42500001 REV A 73