OHAUS ST300, Руководство по обслуживанию, Страница: 17 / 29

CHAPTER 2 MAINTENANCE PROCEDURES
Starter Series Portable Meter Service Manual 2-1 Ohaus Corporation www.ohaus.com
2.1 PREVENTIVE MAINTENANCE
ATTENTION: remove the AAA batteries before cleaning the meter.
Ohaus meters are precision instruments and should be carefully handled, stored in a clean,
dry, dust-free area, and cleaned periodically.
The meter housing may be cleaned with a cloth dampened with a mild detergent if
necessary.
Do not use solvents, chemicals, alcohol, ammonia or abrasives to clean the housing or
control panel.
2.2 SERVICE STRATEGY
All parts of the Starter 300, 300C, 300D and 400 are designed to be replaced rather than
repaired. This includes the Main Printed Circuit Board (PCB). For an illustrated list of
replaceable parts, see Chapter 5.
2.3 OPENING THE METER
Use these procedures in order to replace the Printed Circuit Board and CR2032 battery, if
applicable.
2.3.1 Separating the Top and Bottom Housings
Common hand tools are sufficient to disassemble the Starter 300, 300C, 300D and 400
meter.
1. Remove any electrodes connected to the portable meter.
2. Remove the battery compartment and any batteries in the battery compartment.
Handle the rubber ring inside the battery compartment with care.
3. Turn the meter over. Remove the five screws holding the Housing in place.
(See Figure 2-1.)
CAUTION: Observe precaution for handling electrostatic
sensitive devices.