BRUEL & KJAER 1022 - Applications; Recording Paper

The large figures denote the settings for 50 mm paper while the small
figures are for recordings on paper of 100 mm width.
Hecording Paper.
Different types of pre-printed recording paper to be used on the Level
Recorder in conjunction with the Beat Frequency Oscillator Type 1022 and
Spectrometer Type 2112 combination are available, the paper being manu-
factured with a printed logarithmic frequency scale covering the range from
10 c/s to 40ooo c/s.
Fig. 4.4. The various types of preprinted recording papa.
Two main types of paper, having various features, and which come in
two widths, can be supplied. Also included in the range is polar diagram
recording paper to be used when the Level Recorder is required for this
application (see Level Recorder Manual). Two types of writing are catered
for, either ink or stylus, the applicable surfaces being treated accordingly.
White paper for ink writing is available, with pre-printed lines or outlines
of frequency diagrams and is obtainable in the widths of 100 mm · or 50 mm.
The polar diagram type comes in packs of 100 sheets and has a 100 mm
radius. The waxed paper comes only in 50 mm widths and is intended for
use with a sapphire stylus. The white waxed paper cons 1 ists of coated
transparant paper and exhibits printed lines or frequency diagrams as the
case may be. Waxed paper is particular useful when high writing speeds
have to be used, giving a very clear definition of the recording. When using
the ,se papers the sapphire stylus will leave a thin transparant line on the
waxed paper, the latter being specially made to enable blue prints to be
taken. It is not necessary to double-copy the latter, as the scales being
printed in black will show up if a direct blue print is taken from it.
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