Honeywell Midas-M, User Manual

Page: 65 / 109

CHAPTER
4
Maintenance
Midas-M is a fully serviceable product designed with modular components that can be readily
replaced by trained service personnel so as to minimize the time that the gas detector is not
available.
External in-line air filters should be replaced every three months or more frequently if the system
is sampling in environments that have high levels of particulate matter or very acidic / wet
atmospheres. Similarly, the internal particulate filter should be replaced every two years or more
frequently if the sample lines are prone to heavy contamination. Refer to the following table.
Every sensor cartridge is shipped with a 2 years warranty. All sensor cartridges are factory
calibrated to traceable national standards before shipment to the end user.
Note that testing or calibrating with the wrong (incorrect, out of date, non-traceable) calibration
gases, calibration equipment, methods or operating conditions can actually damage the sensor
cartridge’s lifetime and alter the calibration adversely. Only qualified calibration technicians
should attempt to calibrate the Midas-M gas detector.
The internal pump module is designed to operate for a minimum of 24 months and it is
recommended that this pump module (part number MM-PM ) be replaced every 2 years.
Component Frequency
Pump 2 years or as needed
Internal filter 2 years or as needed
External Sample Line Filter
Part Number 780248, every 3-6 months
Part Number 1991-0147, every 3-6 months
Part Number 1830-0055, every 3-6 months
Leak Check Leak Check every 6 months or after replacing any component.
Bump Test 6 months
Flow Calibration Flow Calibrate after pump, internal and external filter replacement.
Recommended maintenance schedule
Midas-M 65 User Manual