PREVENTIVE MAINTENANCE & REPAIR
(from MCD Manual, version 2017)

Preventive Maintenance
 
The recommended periodic preventative maintenance is as follows:
 
Perform Quarterly Filter Inspection and replace as necessary.
 
Perform Quarterly Performance Verification.
 
Filter Inspection and Replacement
 
Coarse Filters (Tube End Filters) are located in each sample zone and fresh air zone on the ends of the 1/4 inch tubes. The Coarse Filters are sintered brass or bronze, and will naturally discolor to a dark bronze color. Inspect the filter for obvious clogging or build up of dust. Replace, rather than clean the filters.
 
5 Micron Filter is located inside the monitor, inside a clear moisture separator. The 5 micron filter should be ‘paper white’, and will turn gray, or off color when dirty. Replace, rather than clean this filter.
 
Quarterly Performance Check: Once per quarter, perform the End-to-End system test described in the Final Checks Procedure in the previously provided manual.
Commonly Ordered Parts
 
P/N                                  Description
 
410144                            Filter, Coarse Tube
410162                            Filter, 5 Micron
410136-GRAY               Orifice, .016
410224                           Diaphragm Pump
 
Monitor Repair
 
Most monitor repairs can be performed in the field by the typical service technician. Refer to the Troubleshooting Guide found at the end of the provided manual for assistance. Additionally, SenTech Corporation provides telephone technical support for all SenTech refrigerant monitors. If assistance is needed, call 888-248-1988 (317-248-1988 internationally).
 
Should a repair be beyond the normal scope of field service, contact SenTech Corporation for a Return Authorization number for factory repair.
 

PREVENTIVE MAINTENANCE & REPAIR
(from SNIF 1,2,3 Manual, version 2017)

Preventive Maintenance
 
The recommended periodic preventative maintenance is as follows:
 
Perform Quarterly Filter Inspection and replace as necessary.
 
Perform Quarterly Performance Verification.
 
Filter Inspection and Replacement
 
Coarse Filters (Tube End Filters) are located in each sample zone and fresh air zone on the ends of the 1/4 inch tubes. The Coarse Filters are sintered brass or bronze, and will naturally discolor to a dark bronze color. Inspect the filter for obvious clogging or build up of dust. Replace, rather than clean the filters.
 
Quarterly Performance Check: Once per quarter, perform the End-to-End system test described in the Final Checks Procedure on page 12 of the provided manual.
 
Commonly Ordered Parts 
 
P/N                            Description 
 
422050                    Filter,  1,2,3 Coarse Tube
410136-CREAM      Orifice, .010
410224                     Diaphragm Pump 
 
Monitor Repair 
 
Most monitor repairs can be performed in the field by the typical service technician. Refer to the Troubleshooting Guide found at the end of the provided manual for assistance. Additionally, SenTech Corporation provides telephone technical support for all SenTech refrigerant monitors. If assistance is needed, call 888-248-1988 (317-248-1988 internationally).  
 
Should a repair be beyond the normal scope of field service, contact SenTech Corporation for a Return Authorization number for factory repair.  
 
 

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