Ludlum Measurements 3100, Руководство пользователя

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6-4
a. If the desiccant is all blue, then it is in working order and will protect the sensitive electrometer electronics
from moisture.
b. If the desiccant is pink, carefully remove the electrometer lid using the four screws and replace the
desiccant packs with new or rejuvenated desiccant packs.
Note: It is recommended to remove HV bias batteries and discharge chamber wall voltages (using HV bias battery
slug), and to disconnect the electrometer board ribbon cable before removing electrometer lid.
CAUTION
Be careful not to touch the electrometer board with your bare hand. Oils from your skin can cause electrical
leakage, resulting in erratic readings.
6.4.2 Replacement/Rejuvenation. The pink (wet) desiccant may be replaced with fresh desiccant packs or
rejuvenated as follows:
a. Rejuvenate the desiccant by:
(1) Placing the pink desiccant in an Erlenmeyer flask in a microwave oven on the high setting for a
maximum of 20 seconds. Then allow to cool for a minimum of 60 seconds.
(2) If water vapor is apparent, wipe off the water and heat for 20 seconds. Repeat these steps until no
water vapor is seen.
b. Once the desiccant is replaced or rejuvenated, replace the electrometer lid using the four screws. See Figure
6-5.
Figure 6-5. Electrometer Desiccant.
6.5 REPLACING PARTICULATE FILTER. The particulate filter is user-replaceable and is located at the front
of the instrument. Under normal use, it will gradually become clogged with trapped particles and limit the airflow.
In the event the particulate filter at the front of the instrument needs to be inspected and/or replaced, perform the
following procedure. (See Figure 6-6.)
6.5.1 Particulate Filter Removal . Turn the rotary Mode knob to OFF and remove the power cord if applicable.
Disconnect the short airline connected to the top of the particulate filter. Disconnect the T-strap at the top of the