Ludlum Measurements 3100, Руководство пользователя

Страница: 22 / 57

2-7
Figure 2-9. Sample Display Screen.
2.4 MAINTENANCE ACTIONS. There are several maintenance actions suggested below to help with the
continued proper working of the Model 3100.
2.4.1 Scheduled Maintenance.
Maintenance and verification activities will increase confidence and extend the
usable life of the instrument, and are recommended at the intervals suggested below.
2.4.1.1 Daily When In Use.
The operational tests described in Section 2.3 shall be conducted daily or prior to
instrument use. The operational tests verify power, chamber bias, high voltage, temperature, pressure, airflow, and
include either an electronic or radiological check on the tritium detector. The airflow desiccant, if used, should also
be visually checked prior to use.
2.4.1.2 Quarterly.
The Model 3100 shall be visually inspected, including airflow and electrometer desiccant
condition checks, and cleaned when necessary and at least quarterly, per Section 6.3 and 6.4.
2.4.1.3 Calibration. Instrument response shall be calibrated yearly at a calibration facility. Users shall turn in the
Model 3100 within a month of the labeled calibration due date to their servicing calibration facility. See Appendix A
for the calibration procedure.
2.4.2 Storage. The instrument and accessories used with the instrument have certain storage requirements, as
listed below.
2.4.2.1 Remove Batteries.
The AA-size batteries may be removed any time the instrument is placed into storage.
Battery leakage may cause corrosion on the battery contacts, which must be scraped off and/or washed using a
solution made from lemon juice or diluted vinegar, and mixed 50% with water.
2.4.2.2 Fresh Desiccant.
The instrument should be stored with a fresh desiccant in the airflow desiccant chamber
to prevent moisture from condensing and freezing on the pump diaphragm. This should not damage the pump, but it
will prevent it from operating at temperatures near freezing. It is recommended that after operating in a wet or
humid environment and the instrument has persistent readings above zero, the instrument should be run in SAMPLE
or PURGE mode (with AC power) with the desiccant switch set to IN-LINE to ensure the air in the system is dry.
2.4.2.3 Humidity. If the instrument is stored in an area with high humidity, rapid changes in temperature should be
avoided to reduce the chance of condensation. A storage cabinet with a light bulb inside is one means of keeping the
instrument in a slightly warmer-than-ambient temperature environment in order to prevent problems from rapid
changes in temperature and humidity.
In order to prevent moisture or humidity build-up inside the instrument, any time that the instrument is in storage or
not in use, the vinyl hose should be connected to the inlet valve on one side and to the outlet valve on the other. See
Figure 2-10.