TSI Incorporated 8525, Руководство по эксплуатации и обслуживанию

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Operation
21
Daily Zero Check
Before beginning to sample with the P-T
RAK
®
particle counter, it is
important to verify that the instrument is operating normally. This Daily
Zero Check should be performed at least once a day.
1. Turn on the instrument and let it warm up (approximately
60 seconds).
2. Remove the sample tube from the inlet screen assembly (if
attached).
3. Attach the supplied zero filter assembly (item #4, Figure 1-3) to the
inlet screen assembly.
4. The particle concentration should go to zero in approximately 5 to
10 seconds. Leave the zero filter attached to the instrument for
30 seconds, to make sure the zero reading is stable.
Note : If the instrument does not go to zero, please refer to
Chapter 5, Troubleshooting , for more information.
The Daily Zero Check cannot be performed when the
telescoping sample probe is attached to the instrument.
The telescoping joints will cause a small number of
particles to be sampled and will invalidate the zero check.
5. Remove the zero filter. Attach the sample tube and telescoping
sample probe, as desired. The instrument is now ready for
operation.
P-T
RAK
®
Particle Counter Keypad
The P-T
RAK
® particle counter is controlled using a simple, 4-way keypad,
with Up, Down, Left, and Right keys along with an Enter key. These keys
are used to move between menu items, to increase or decrease selected
values and to select the desired item/value. When pressing the keys on the
front panel, the P-T
RAK
® particle counter beeps to confirm the function. See
Figure 3-1.