Hach Ultra MET ONE 227, User Manual

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12
Installation
3.3 Mechanical installation
3.3.1 Install the isokinetic probe
The isokinetic probe (refer to Figure 4 on page 12 , item 2) is used in the laminar air flow
for a flow rate of up to 100 feet per minute.
To install the isokinetic probe:
1. Remove the red sensor inlet cap from the MET ONE 227 particle counter.
Note: To minimize contamination, the isokinetic probe is protected with a cap on the opening
that should remain in place till the probe is used.
2. Attach the isokinetic probe to the sensor inlet so that the open end faces the direction
of the air stream.
3.3.2 Install the purge filter
The purge filter (refer to Figure 3 on page 11 , item 2) is used for the maintenance of the
MET ONE 227 particle counter. The filter prevents the contamination of the sensor and
purges the sensor of accumulated internal particles.
To install the purge filter:
1. Remove the red sensor inlet cap or the isokinetic probe from the MET ONE 227
particle counter.
2. Attach the purge filter to the sensor inlet.
Figure 4 Installation of the isokinetic and relative humidity/temperature probe
1 Relative humidity/temperature probe 3 MET ONE 227 particle counter
2 Isokinetic probe