Ametek Land 4200, Руководство пользователя

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User Guide Model 4200 Dust & Opacity Monitor
10 Calibration
10.1 Calibration Audit
To perform a calibration audit remove the front detail plate (Fig. 10-1) from the
transmissometer to expose the display/ keypad unit. The display may be blank
as a time out facility operates in the software. Press the Mode key (left key on
keypad) until 'c' is displayed on the left hand side of display. e.g.
Remove the top cover on the transmissometer (Fig. 10-1) by loosening the two
securing screws and sliding the cover forward. DO NOT REMOVE THE YELLOW/
GREEN WIRE.
Fig. 10-1
Key 1) Front Detail Panel
2) Filter Holders
3) Top Covers
10.1.1 Zero check
Retrieve the zero reflector holder (dispatched in separate packaging) part number
703.051. Place the holder in the calibration filter position 1 (nearest the stack
see Fig. 10-1 - see note) with the reflecting surface towards the display end of
the instrument. After a few seconds the display reading will settle down, the final
figure will indicate the zero drift of the instrument.
Note
The zero reflector must be pressed fully down in to a near vertical position
(Fig. 10.2). To achieve this keep pressure against the filter holder spring.
Correct method for mounting zero reflector in holder.
Fig. 10-2