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68 Detector Switch Replacement
Section 4: Maintenance Operating and maintenance instructions
January 2015 3-9008-701 Rev J
design has been simplified from the old design. Volume re-certification is no longer necessary
when replacing a volume switch on the ‘plug style’ or the ‘pin-and-socket’ optical assemblies.
See Section 4.6 for further information regarding switch replacement on the ‘plug style’ optical
assembly.
See Table 7-1 for part numbers of retrofit kits for these older provers.
Compact provers built from June 1989 to December 2000 have the ‘pin-and-socket’ optical
assemblies. If an upgrade to the new ‘plug style’ optical assembly is desired, a new optical
assembly will be required. See Table 7-1 for these part numbers.
4.6 Detector Switch Replacement
Reference Figure 4-13, Figure 4-14 and Figure 4-15.
Important:
When using more than one intrinsically safe circuit, the rules and regulations for interconnec-
tion shall be duly observed. The Switch Pad location has been factory set and under normal
conditions will not require adjustment.
Figure 4-13 Detector switch removal #1