USSR Impedance Bridge Resistance Box Resistor P333 from 0.005 Ohm to 999.9K Ohm

Description

USSR Impedance Bridge Resistance Box Resistor P333 from 0.005 Ohm to 999.9K Ohm    1973
Good condition.
See the photo.
Works
.
P333 Multivalued
decade resistance box, bridge,
resistor analog of:
General Radio (GenRad), LEEDS & NORTHRUP, ESI, IET Labs, GR, Yokogawa, Shallcross, Tinsley & Co, Shallcross, Leeds & Northrup, L&N, Extech, EMCO, AEMC
devices,
but
has the same or better characteristics:
R333 is designed to:
a) measure the resistance of single circuit of the bridge;
b) determine the place of cord damage  through the Varley loops;
c)  determine the place of cord damage  through the Murray loops;
d) measure the asymmetry of the wires;
e) be used as a resistance bridge.
Accuracy class
Max error
, %
Range
,
Ohm
0,5
0,5
1
-
99990
Ohm
1,0
1,0
1·10
-1
-
0,9999
Ohm
5,0
5,0
5·10
-3
-
0,0999
Ohm
10
5
-
999900
Ohm
Quantity of the decades:
5
;
Accepts resistance
1-999900 Ohm;
Type of the current:
DC;
Dimensions:
300
x230x150mm;
Weight:
5
kg.
This device was also used in USSR and Russia army. So it has best quality
,
longevity and permanence characteristic.
Condition:
Tested and 100% workable.
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DC bridge
P333
d
esigned
for:
a)
resistance measuring at
single
bridge scheme
;
b)
determining the place of
cable damage through the
Varley’s loop
;
c)
determining the place of
cable damage through Murray’s loop
;
d)
measuring of wires asymmetry
;
e)
using
the bridge
as resistance box
.
Measurement range: from
1 to
99990
Ohm
,  from 1
• 10
-1
to
0.9999
Ohm
, from 5
• 10
-3
to
0.0999
Ohm,
from 10
5
to
999900
Ohm.
Accuracy class:
0.5; 1.0; 5.0.
Technical characteristics
Bridge accuracy class and
acceptable
basic error
of bridge
measurements
, expressed
in percentage from nominal resistance
value
measurements does not exceed
values ​​specified
in the table.
Accuracy class
Acceptable
basic error
, %
Measurement range, Ohm
0.5
0.5
From 1 to 99990 Ohm
1.0
1.0
From 1·10
-1
to 0.9999 Ohm
5.0
5.0
From 5·10
-3
to 0.0999 Ohm
From 10
5
to 999900 Ohm
Resistance of the
highest
decade back comparison
bridge 1000
Ohm. Resistance of
ratio back
is at least
1Ohm
.
Primary resistance box
comparative back
,
resistance
during installation
all
decades switches on zero
is less than
0.02
Ohm.
Variation
of primary resistance box
comparative back caused by
changes in
contact resistances
and contact
switching devices
does not exceed
0.003
Ohm.
Error changes
in bridge P333measurements
, caused by
changes in
ambient temperature
does not exceed
a
half allowable
values of
basic error
for every 5
°C of temperature changes.
Insulation resistance
between all
bridges
P333
current conducting
circuits
and its
case
at
temperature
and humidity is
200
MOhm
.
Insulation between isolated from bridge
P333
case conducting
circuits
can withstand
for
1 min
test voltage of
500 V in practically
sinusoidal
50
Hz frequency.
Bridges P333
switches
can withstand
50000
turns
without any
defects.
Dimensions
of the bridge
P333
is not
more than
300x230x150
mm.
Weight is not more than
5kg
.
Technical characteristics
:
Temperature
+10  +35 ° C;
Relative humidity
up to 80%;
Atmospheric pressure
84-106,7 kPa (630-800 mmHg);
This device also can named:
P
333
, P-
333
, P 333, R
333
,
R
333
, R-
333
, р
333
,
р
333
, р
-
333.
decade resistance box, resistance box, decade box, decade resistance, decade resistor box, shop, mera, etalon
, resistance calibrators, calibrators.
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