Decade resistance Boxes

Switches Used          :     Brass with silver Plating

Resistance used       :     Wire wound, wound non-inductively on bakelite

                                          spools, heat treated & processed for ageing, varnish coated.

                                          All resistances are of 1 watt.

Wire Used                  :    Constantan Accuracy 0.1%, Manganin 0.05%.

Cat No.  

Sub Division

TOTAL
140
141
142
143
144		 Single Dial
"
"
"
"		 0.1
1
10
100
1000		 1
10
100
1000
10000
145
146
147
148		 Two Dials
"
"
"		 0.1 &1
1 & 10
10 & 100
100 & 1000		 11
110
1100
11 K
149
150
151		 Three Dials
"
"		 0.1, 1 & 10
1, 10 & 100
10, 100 & 1000		 111
1110
11.1 K
152
153		 Four Dials
"		 0.1, 1, 10 & 100
1, 10, 100 & 1 K		 1111
11.11 K
154 Five Dials 0.1, 1, 10, 100 & 1000 11.111 K
155 Six Dials 0.1, 1, 10, 100, 1 K & 10 K 111.111 K

POST OFFICE BOXES

(CONSTANTAN COILS - ACCURACY 0.1%)
Cat No.  
161

162

Having Brass Switches with Silver plating

Having Silver-to-silver alloy Contact Switches

(manganin Coils - Accuracy 0.05%)
163

Having Brass Switches with Silver plating
164

Having Silver-to-silver alloy Contact Switches
 

MEGOHM BOX
Cat No. Description
171

PLUG TYPE
Subdivided into 0.01, .02, .02, .05, .1, .2, .2, .5 Meg Ohms. Total Resistance 1.1 Meg ohm. Resistance used are of high stability metal film having wattage ½ W. Accurately adjusted with resistance wire to give overall accuracy of + 1 %.
  Dial pattern

Accuracy + 1% upto10 M , + 2.5 %upto 100 M , + 5 % above 100
Cat No. Description
190

MEG OHM METER (INSULATION RESISTANCE TESTER)
Suitable to check very high resistance from 0.1 Megohm to 1000 Meg ohm at 500 V DC. Direct display on big analog scale (moving coil type meter) operated from 3 pencil cells. It can also measure AC Voltage upto 600V.
 

<< BACK << >> NEXT >>