 |
|
|
1460. Meter Bridge or
Wheatstone Bridge
As above but with spring type Press Jockey. |
|
|
|
1461. Meter Bridge or Wheatstone Bridge
RAC with additional terminals and blocks for testing by Carrey
Foster Method, 4 gap type with Pencil Jockey. |
|
|
|
1462. Meter
Bridge/Wheatstone Bridge
With spring type Press Jockey. |
|
|
|
1463. New
Meter Bridge Model Deluxe
Consists of wooden base 70 cms. long, over which the bridge wire,
one meter in length, is doubled over so that all connections are
grouped together at the left end for smooth sliding with 2 contact
makers, one for each half meter of wire. |
|
|
|
1464.
Potentiometer Slide wire precision
A circular dial gives range from 0 to 1. 7 volts in steps of 0.1
volt. For lower values a large disc engraved in millivolts is
provided. Each milli-volt is sub-divided in 5parts. Thus the slide
wire division corresponds to 0.0002 volt and readings are obtain.
able down to zero.
Two rotary type rheostats for coarse and fine adjustments are
provided which ensure rapid and accurate adjustment of the
instrument current There are three pairs of terminals for three
external circuits which may be connected separately by a three way
rotary switch. Terminals are provided for standard cell,
galvanometer etc. The instrument circuit resistance is 11 ohms per
volt. Accuracy on the normal range. 0.0001 volts ± 0.01 % on the
inter range. |
|
|
|
Resistance Bridges
1469. Kelvin Bridge : RAC Plug type with double ratio
box, open plug type, with ratio of 1,10,100, and stretched wire on
500 mm scale, jockey sliding on 5/16” spuare rod heavy terminals. In
series with stretched wire of 0.1ohms are plug resistance of 0.1,
0.1, 0.2, 0.2 and 0.5 ohms.
Lowest rsistance 2 x 10-6 ohms. Resistance
measureable with accuracy of 1%, 2 x 10-4 to 2 x 10-3 ohms.
Resistance measureable with 0.2% accuracy 10-3 ohms
|
|
|
1470. Precision Kelvin Double
Bridge
There are 10 coils of 0.1 ohm each arranged on a rotary dial and a
circular slidewire sub-div!ded with 100 equal parts, is in series
with 10 coils. Each division of slide wire is equal to 0.001 ohm.
Multipliers: of x 10, x 1, x 0.01.
Measurement 1.1 to 0.00001 ohms.
Maximum current 2 amperes.
Accuracy: ± 0.1% Manganin coils are used. |
|
|
|
1471.
Industrial Kelvin Double Bridge
The variable standard Resistance consists of 10 coils of 0.01 ohm
each on rotary dial. A circular slidewire subdivided and of total
resistance 0.01 ohm is in series with the10 coils. Each division of
the slidewire is 0.0002 ohms.
Range Multipliers There are 5 range multipliers of x 100, x 10, x 1,
x 0.1, x 0.01.
Measurement: 11 ohms to 0.2 micro ohms. Separate potential and
current terminals are provided.
Maximum current: 10 Amperes Manganin coils.
Accuracy: ± 0.05%. |
|
|
| |
|
|
<<BACK
|
NEXT >> |
Top |
|
Page |
1 -
2 -
3
-
4 -
5 -
6
-
7
-
8
-
9
-
10
-11
-
12
-
13
-
14
-
15
-
16
-
17
-
18
-
19
-
20
|
|
