CLIMET INSTRUMENTS CI-154, Руководство пользователя, Страница: 21 / 98

CI-154 User’s Manual
Page 11
2.2 Performing routine tasks with the CI-154
2.2.1 How to take a sample
Before taking a sample, first make sure that the dust cap has been removed from
the inlet. If a sample probe is used, it should be pointed towards the HEPA filter
when sampling a laminar flow area. In non-laminar flow areas (those areas away
from the HEPA filter) ISO 14644 recommends that the sample probe be placed
vertically, at about the height of the work area.
If not already set up, the Sample Volume and the number of samples should be set.
At that point, simply press the [
START
] soft key from the main data screen. This key
is located at the extreme bottom left of the display.
To set the sample volume, press the [
SET
-
UP
] soft key from the main data screen. In
the set-up menu screen, press the [
VOLUME
] key at the top of the menu area. This
takes you to the sample volume entry screen. The cursor is already in the entry
field, ready for you to enter the sample volume. To enter a 1 cubic foot sample,
press the [
CUBIC FEET
] key and then press [1]. Now press the [
ENTER
] key to return to
the main setup screen. Press [
EXIT
] again to return to the main data screen.

NOTE: When you access parameter entry screens, there is no
default value. Be sure to enter a value before leaving
the parameter entry screen. If you want to keep the
original setting, simply press cancel.
2.2.2 How to set an alarm level for particle count
Alarm levels are entered in the same manner as the sample volume. Enter the main
menu screen by pressing [
SET
-
UP
] from the main data screen. Press [
ALARMS
] at the
bottom left corner of the menu screen. In the alarms menu screen, select the
particle size for which you want to set an alarm level. In the alarm level entry
screen, press the appropriate numeric keys to set the desired alarm level, then
press [
EXIT
]. To clear an alarm level, press [
OFF
] in the alarm level entry screen and
press [
EXIT
]; when you return to the menu screen the value for that channel will
change to off.
Along the bottom of the alarms menu screen you have four options. The first, [
BEEP
ON KEY
], enables the beeper to beep every time a key is pressed. If the key is yellow,
there will be no beep when keys are pressed.
The second parameter, [
BEEP ON COUNT
], is used to enable the beeper to beep each
time a particle is detected. This is helpful when trying to find a leak around a filter—
the particle counter beeps faster as you approach the leak, and decreases as you
move the sample probe further away from the leak.
When an alarm level is violated, the alarm status key on the right side of the main
data screen will change to red (from green) and
OK
will change to a flashing
ALARM
RESET
. At the same time, a flashing red highlight bar will appear across the counts
for the channel that violated the alarm level. No audible alarm, however, will be
sounded unless the [
BEEP ON ALARM
] key has been enabled. This [
BEEP ON ALARM
] is the
third parameter key along the bottom of the alarm menu screen. The alarm is
enabled when the key is green.