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INSTRUCTIONS FOR OPERATING CALSTAN MODEL 223

COMBINED TUBE CHECKER AND MULTITESTER

The CALSTAN combined tube checker and multi-tester is
literally a universal instrument, its application being extremely
simple. Its main uses are:-

TO TEST

The efficiency of valves. Milliamps D.C. .5 ranges.
Shorts and leakage in valves. Volts D.C. .....5 ranges.
Electrolytic condensers. Volts A.C. .....5 ranges.
Dry type (static condensers). Ohms. ..........5 ranges.

EQUIPMENT:- 1 pr. top cap wires, 1 pr. test prods.

BATTERIES:- 3 No. 3678 Eveready, 1 U2 Eveready. These
batteries should be replaced when the ohms scales can no longer be
brought to full scale. They may be easily removed by slackening
the screws holding the metal clamps.

OPERATION:- THE OPERATOR SHOULD READ THESE INSTRUCTIONS VERY
CAREFULLY IF COMPLICATIONS ARE TO BE AVOIDED.

TUBE CHECKER PORTION:- Before a valve is tested it is
necessary to check the line volts in order to register a faithful
test. The reason for this test is because of the possible
variation of the line above or below its rated voltage. A toggle
switch is provided to change the application of the instrument
from (200-220) to (230-250) volt lines. The test selector switch
should be turned to the position marked VALVES and the main
selector switch turned to the position marked L (line). On
switching on the current the meter needle will deflect in close
proximity to the arrow on the GOOD-BAD scale. The pri. adjust
should now be rotated until the needle is as close as possible to
the arrow. The instrument is now ready for use.

SHORTS-LEAKAGE:- Before a valve is tested for efficiency it is
necessary for shorts or leakage. The operator's attention is
strongly drawn to this precaution as shorted elements will cause
the meter to become overloaded. Any valve which does not pass this
test should be classed as faulty. Turn the main selector switch to
the S (shorts) position and set the filament volts switch at its
lowest setting and rotate the element selector switch slowly over
its entire range. Tap the valve sharply during this operation as
loose elements are a common fault. If any shorts are present a
definite glow will be seen in the neon. A sharp glow may be seen
when rotating the switches but as this is due to a condensor
discharge it may be disregarded. A good idea of the nature of the
short may be gaind from the intensity of the glow. A very low
resistance short will be indicated by a brilliant glow. A faint
glow indicates a high resistance short. In the case of most valves
a very faint glow may be disregarded as this is quite normal. The
numbers on the switch correspond to the system of numbering with 3
and 4 as heaters in each case. N0.2 is plate in most cases and 1
screen etc. As an example a glow on 8 and 2 denotes a short
between top cap electrode and plate. A glow on one point only
indicates a short between that element and heater. The filament
volts may now be advanced to suit the valve (see chart, and the
operation repeated. This tests the valve in a hot condition
thereby tracing shorts due to hot and expanding elements. If a
valve passes this test proceed with the next operation.

MERIT TEST:- Leave the filament switch on the correct position
and turn the range control to its lowest setting. Now consult the
chart for the position of the main selector and element selector
switches. Set these at their correct positions and advance the
range control to its correct position. The condition of the valve
should be indicated on the scale.

DIODES, RECTIFIERS, ETC:- In the case of some valves this test
is insufficient, so means are provided to test the minor elements.
The most important of these are shown on the chart together with
their switch settings. The testing of those elements should not be
overlooked as they greatly impair the efficiency of the valve. The
procedure is the same as for merit. NOTE:- When testing cathode
type valves for efficiency the element selector switch should not
be placed on the cathode postion as this causes current to flow in
the opposie direction. Always turn the range control to its lowest
setting before rotating thereby protecting the meter from
overloading.

ABBREVIATIONS USED IN CHART:- D1. (diode). 2nd D1. (2nd
diode), 2nd P.(second plate).

To TEST ELECTROLYTICS:- Adjust the mains as explained in the
instructions for testing valves. When this has been done turn the
test selector switch to the position marked condensers. It will
be noticed that five ranges are given on the main selector switch
(condenser). These ranges correspond to the operating voltages of
most electrolytic condensers. Now, if an electrolytic is placed
across the terminals (marked) in correct polarity a current will
flow through the meter. This current is determined by the
capacity of the condenser and the voltage placed upon it. The
range control (electrolytics) increases the range of the meter.
As explained, the operating voltages are given on the switch so no
difficulty should be experienced in selecting a range
approximating that of the condenser to be tested. Advance the
range control to its correct position (see chart) and the
condition of the condenser will be given on the meter. The
doubtful position on the electrolytics scale is only a reminder
that in the even of an open circuit the meter will not indicate.
Always turn the range control to its lowest setting so as to
protect the meter in the event of a short circuit.

RANGE CONTROL CHART:-

Microfarads Degrees Microfarads Degrees
2 ................23 20................2
4..................9 25................2
6..................6 30................1
8..................4 40................1
10..................3 50................1
15..................2

DRY (STATIC CONDENSERS):- The same switch positions are used
for these condensers. It must be remembered, however, that the
positions on the main selector become merely reference points for
various capacities. The smaller the condenser to be tested the
smaller the setting on the switch. The minimum capacity which can
be tested is .005 mfd. and the maximum 4 mfd. Now as a condenser
is placed across the terminals (marked) a sharp flash will be
seen in the neon. The switch should be adjusted until the
sharpest and most distinct flash is seen. This indicates a good
condenser. A bad condenser is indicated by continuous flashing or
a steady glow in the lamp.

VOLTS OHMS MILLIAMPS PORTION:-

A.C. VOLTS:- The ranges for A.C. volts are 5,10,150,250,1250.
Place the test selector switch on the A.C. volts position and
select the required range on the main selecter. The voltage to be
measured should be placed across the terminals (marked). If in
any doubt as to the pressure to be measured select the highest
range first and work down until a satisfactory reading is
obtained. A.C. volts should be read on the special A.C. scale on
the meter. The ranges on the scale should be multiplied or
divided according to the range in use. (Note A.C. volts above 25
should be read on the D.C. scale).

OUTPUT VOLTS:- The procedure is the same for the A.C. volts
except that the voltage should be applied to the terminals marked
accordingly.

D.C.VOLTS:- The ranges are the same as A.C. volts. Place the
test selector on the D.C. volts position. The voltage to be
measured should be placed across the terminals marked accordingly.
Read on the D.C. linear scale.
D.C. MILLIAMPS:- Ranges 1,5,25,100,250. Place the test
selector on the D.C. MA'S position and apply the current to be
measured across the terminals marked accordingly.

OHMS:- The five ranges of ohms are:- divide by 100 (0-500),
divide by 10(0-5000), Sc. (0-50,000), X10 (0-500,000), X100 (0-
5,000,000). The X 100 scale can only be operated when the A.C.
mains are switched on. The other ranges are operated by means of
internal batteries. Place the test selector on ohms position and
select the required range by means of the main selector switch and
short circuit the terminals (marked). The needle should be
adjusted for ohms zero by means of the ohms adjuster control. If
the X100 scale is in use adjust by means of the pri.selecter
switch. Now open the terminals and place the resistance to be
measure across the terminals. The scale should be multiplied or
divided according to the range in use.

GENERAL:- Providing the instructions have been carefully
followed no difficulty should be experienced in operating the
instrument. The operator's attention is again drawn to several
precautions:-

When testing valves and electrolytics be sure to see that the
range controls are returned to zero. Advance after the required
ranges have been selected.

When measuring volts etc., be sure to select the highest range
first and work down until a satisfactory range is obtained.

Damage to the instrument due to neglect in this respect is not
covered by the guarantee.

GUARANTEE:- The instrument is guaranteed for a period of
twelve months from time of purchase. The 1V valve in the
instrument is guaranteed for a period of three months. Damage due
to misuse is not covered, but any electrical or mechanical defects
which may arise will be repaired or replaced on return to the
distributor from whom it was purchased or direct to Slade's Radio
Pty. Ltd. When or if returning for repair kindly state the
nature of the complaint as matters are thereby greatly simplified.

If any further information is required on the use or
application of the instrument kindly write to :-

SLADE'S RADIO PTY. LTD.,

LANG STREET, CROYDON N.S.W.