TSI Incorporated 8587A, Руководство по эксплуатации и обслуживанию

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4-4 Model 8587A Laser Photometer
P e r f o r m i n g F i t T e s t s
Respirator fit testing using TSI’s Model 8587A Photometer can be
accomplished using these suggestions.
Test Control
The Laser Photometer has been designed specifically for use with an
external control and data acquisition program through its RS-232 or USB
communications port. The instrument provides a set of control and data
acquisition commands for this purpose.
The instrument is also capable of making respirator or filter test
measurements as a standalone instrument by manually selecting the
operation mode and recording the data by hand.
Performing a Fit Test Manually
This manual test sequence is performed without the use of a specific
software program for performing fit testing.
The following test recommendations are suggestions only and should be
considered a minimum requirement. The operator must fully understand
their own requirements and develop appropriate protocols for their
measurements.
Manual Test
To complete a manual respirator fit test using the UPSTREAM,
DOWNSTREAM and PURGE buttons on the front of the Laser Photometer
follow these steps.
1. Connect the vacuum and sample lines to the Laser Photometer as
described in
Chapter 2, “
Unpacking and Setting Up .
” The Downstream
sample line (DOWNSTREAM) must connect to the suitable port on the
respirator and the Upstream line (UPSTREAM) routed into the
chamber at a location from which a representative sample can be
obtained.
2. Press the PURGE keypad switch to enter the purge mode. Wait for the
voltage reading to stabilize (10 seconds). Record the voltage reading
on the display. This is the Zero Voltage.
3. Press the UPSTREAM keypad to enter the Chamber sample mode.
Wait 20 seconds for the signal voltage to stabilize. Record the voltage
data.
4. Press the PURGE keypad switch to enter the purge mode. Switch and
wait for the scattering chamber to clear of aerosol and voltage to
stabilize (15 seconds).