Westinghouse G-40 Instructions Manual

GENERAL
The type G-40 recording instruments
should be installed where they will not
be subjected to excessive vibration,
dust, moisture or variations in tem­
perature. In general, good indicating
instrument practice should be followed,
with additional regard to the fact that
temperatures below freezing will inter­
fere with the flow of ink.
The design of the type G-40 recording
instruments obviates the need for ex­
cessive clearance from neighboring in­
struments when mounting on a switch­
board. As little as one-half inch on each
side of type G-40 is sufficient clearance
to allow plenty of room for changing
gears, winding clock, inking, etc .. be.
cause of the titling paper carriage con­
struction.
When mounting on metal panels with
the associated shunts, reactors and re­
sistors when required, keep in mind the
insulation rating specified for
various accessories. Type G-40 record­
ing instruments are tested for use on
7
circuits up to and including
Type G-40 recorders are well shielded
against stray fields, the "E x ternal field
influence" being less than ?4 per cent.
5
External fields stronger than
should be avoided.
INSTALLATION
Unpacking
Unpack carefully. Be sure that all
small accessories, spare parts, etc., are
found before discarding the
material. Preserve the packing case for
use in the future, whenever it may be
necessary to either store or reship the
instrument.
For list of accessories supplied with
each recorder see page 9 .
Mounting
Carefully observe the following di­
rections and execute them in the order
in which they are given:
a. Thoroughly familiarize
with all the information in this in­
struction book.
b. For panel mounting, drill
panel according to the drilling plans
in this leaflet. When
ing, see that the instrument is level.
I.L.
Supersedes 43-400-A
Type G-40
Recording Instruments
INSTRUCTIONS
c. Mount the instrument upon the
switchboard
using a level to insure its being
placed in a vertical position both
parallel and perpendicular to the
board. The support should be as
free as possible from vibration.
d. Trace out all
connections carefully and connect
according to the proper diagram.
Except in the case of portable in­
struments, all diagrams are made
showing the connections as they
appear from the rear of the board
unless specifically indicated other­
wise. The cover is held in place by
four thumb screws, which release
quickly when turned, due to their
quadruple threads.
Remove cover and tilt the paper driv­
ing unit forward as shown in Fig. 4.
The unit is held in position by a latch
which must be released by means of the
these
lever at the upper end of the right hand
side plate. If desired the complete chart
mechanism may be removed, while it is
50 volts.
in the forward position.
Removing the Pen
It is advisable to remove the pen be­
oersteds
fore proceeding further.
The moving element incorporates a
removable arm on which the pen is
located. To remove the pen, press the
flat springs apart.
Release the spring
packing
movement locking mechanism, in the
G-40 type by turning the locking nut
5.
shown in Fig. The movement must
always be locked before transporting an
instrument.
Make a general mechanical inspection
to see that rough handling in shipment
has not damaged any parts of the in­
strument.
Inserting the Chart
yourself
The paper driving unit being in the
forward position as shown in Fig.
the the unused roll of paper is placed in the
upper receptacle at the rear of the unit
mount­ as shown in Fig. 2.
length of the paper, and feed it carefully
INSTRUCTION LEA F LET 43-400-B
under the chart roller and guards over
or other support, driving
paper on this drum, it can be forced
to rotate through the friction clutch,
without driving the timing mechanism.
Continue to roll the paper on the drum
until the end of the paper extends about
eight inches below the recorder. Crease
external electrical
the paper squarely across, about one­
half inch from the edge, and fold it in
so that the smooth folded edge is away
from the recorder.
spool by pressing the right-hand spring
stop to the right and lifting out the
spool. Thread the folded paper into
the re-roll spool slot, and wind on a few
turns of paper.
on the re-rol! drive pulley at the left,
rotating if necessary to engage the drive
ing means, and press the right-hand end
of the spool in place. Both spools rotate
clockwise when viewed from the left­
hand side of the recorder.
Starting the C lock
On the spring clock, there is a small
lever by which the mechanism can be
started or stopped. Move the lever " up"
to stop, and press it "down" to start
the clock.
For the synchronous motor, a small
separable plug and socket serve to dis­
connect
desired.
Clocks may either be hand-wound
eight-day
mounting and
synchronous motor type.
provides the power for driving the strip
chart. Either form of clock can be set
to drive the paper at normal speeds of
%;, 1Yz,
various speeds just mentioned are made
possible by using appropriate sets of
gears furnished with the instrument.
These gears are held in place by a thumb
nut, both when stored on the lower side
of the chart mechanism, and also when
in use, one at a time, at the left of the
clock mechanism.
gears, required for the paper chart speed
4,
desired, take care to align the slot with
the shaft pin before pressing the gear
into place. The chart speed produced by
Unroll a short
each gear is stamped on its face.
drum pins; by pressing the
Remove the re-roll
Insert the re-roll spool
and stop the motor when
spring-driven type, or the
The clock
3,
or 6 inches an hour. The
When inserting the