Toshiba Density (Consistency) Meter LQ500, Operation Manual

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7.2 Maintenance and Inspection Items
Periodic maintenance and inspection is necessary for reliable measurement over a long period of
time. Since the density meter has no mechanically moving parts, however, it does not require
replacement of mechanism elements in a normal operating environment.
Compare the density measured value and the manually analyzed value in the cycle shown in Table
7.1. If necessary, implement the span calibration after implementing the zero calibration. Clean up
the detector when it is necessary.
The spare parts that must be kept on hand are the fuses in Table 7.2.
Table 7.1 Maintenance and Inspection Items
Item Cycle Remarks
Comparison of density meter measured
value with manually analyzed value
Any time
At least three samples are
desirable.
Check the appearance of detector
(accumulation of dirts, scratches, etc)
Any time
[NOTE]
◆
If the density meter measured value deviates from the manually analyzed value to the
extent of causing obstacles, implement the span calibration (changing the density
multiplier C) while referring to Section 6.5.
◆
If the density meter measured value greatly deviates from the manually analyzed value by
less than half or more than twice, implement the span calibration after implementing the
zero calibration while referring to Section 6.4 and 6.5.
◆
If the density meter is used to measure process flow whic h contains plenty of wool or
fabric substances, these substances may accumulate on the detector, thus perform
maintenance and inspection, and cleaning periodically (every 3 months).
Table 7.2 Spare Parts
Name Specifications Qty
Fuse
2A(T),250V cartridge, glass tubular fuse,
5.2mm outer dia. x 20mm long
Shape/characteristics: 5NM or equivalent (based on JIS C
6575)
2