AEROCET 532 Manual Rev B
Page 32
8.
Maintenance
Due to the nature of the instrument, there are minimal customer serviceable
components in the AEROCET 532. The case of the AEROCET 532 should never be
removed or opened for any reason.
Opening or removing the case of the AEROCET
532 voids the warranty and may result in exposure to laser radiation, which can
cause eye injury.
8.1.
Recommended Service Schedule
Although there are no customer serviceable components in the AEROCET 532, there
are service items which ensure the proper operation of the instrument. Table 1 shows
the service schedule for the AEROCET 532.
Time Period
Item
Manual Section
Weekly
Zero Count Test
Monthly
Flow Rate Test
Yearly
Annual Calibration
Yearly/As required Filter change
Table 1 Service Schedule
8.2.
Zero Count Test
Air leaks or debris in the particle sensor can cause false counts which may result in
significant count errors when sampling clean environments. Perform the following zero
count test weekly to ensure proper operation:
1. Attach zero count filter to the inlet nozzle (PN G3111).
2. Configure the unit as follows: Measure = Counts, Mode = Single, Sample Time =
1 minute, Volume Units = Total Count (TC).
3. Start and complete a sample.
4. The smallest particle size should have a count <= 1.
5. Run this test multiple times to flush out particles in the air stream if the goal is not
met.
8.3.
Flow Rate Test
The flow rate test verifies the sample flow rate is within tolerance. The reference flow
meter must be non-loading because the vacuum pump can be loaded down by external
restrictions. Met One Instruments, Inc. sells suitable flow meters (PN 9801 or Swift 6.0).
The flow rate test is described in section 5.3.4.
