Scans by ArtekMedia © 2007
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INDICATORS
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CONTROL
COARse
WHEEL PUSH BUTTON
SETUP
CONDITION
SELECTORS
been displayed, press the
COARSE
pushbutton a second time to exit the
coarse-tuning function (and extinguish the "COARSE" display). The con
trol wheel can then be used to fine-tune setup condition values.
Some of the measurement and plotting functions performed by the HP
7090
require the selection and positioning of pens. Pen control is accomplished
from the front panel by using the controls described in the following
paragraphs.
Pen Selection Controls
When plotting direct recordings, drawing grids, or printing labels, you will
need to select the pen(s) of your choice by using the
PEN SELECT
pushbuttons.
The pushbuttons are numbered
1
through 6; these numbers correspond to
the positions of the pens in the carousel.
To select a pen, press one of the
PEN SELECT
pushbuttons. The pen holder
will move from its present position to the carousel, which rotates until the
selected pen is accessible by the pen holder. The pen holder then retrieves
the pen and returns to its previous position.
The first pen selection made following power·up causes the carousel to
rotate to a standard orientation so that correct pen selections
will
be made.
(The tapping noise heard during this initial rotation is normal, and is
caused by the carousel-advance mechanism.)
If a pen selection is made when the pen holder is already holding a pen, the
holder stores its current pen before retrieving the newly selected one. Try
pressing some
P
E
N SELECT
push buttons to familiarize yourself with the pen
select function.
When not using the HP
7090,
the currently selected pen should be returned
to the carousel to prevent ink evaporation. To store the last pen, press
SHIFT
Setup
Conditions Menu
and Controls
The Pen Controls
SELECT
Instrument Description and General Operation
2-17