OHMMETER No. 19

A general purpose Ohmmeter for use on internal and external work.

Ranges:-
Insulation: 0-100M ohms (250v) or 0-200M ohms (500v).
Resistance: 0-5M ohms.
Continuity: 0-200 ohms.

There are two types: 250 volts and 500 volts and many variants: No. 19A, No. 19A/1, No. 19B, No. 19B/1 and No. 19C/1.

The Ohmmeter No. 19/1 consists of an Ohmmeter No. 19A (Marks 1 & 3) in a case, Instrument No. 13A.
The Ohmmeter No. 19B/1 consists of an Ohmmeter No. 19B (Mark 2) in a case instrument No. 14A.

Internal fuse - 100mA.

To be requisitioned separately:-
6 x Cells, Dry R6 (No. 19A).
1 x Battery, Dry No. 30 (No. 19B).

Drawings - CD2194_1, CD2194_2, CD2194_3, CD2600_1, CD2600_2, CD2600_3 and CD2600_4.

Specification - D2391.

Operation
1. CHECK BATTERY, SWITCH TO 'B' AND PRESS BUTTON. IF POINTER INDICATES 'RED' REPLACE BATTERIES LOCATED UNDER THIS COVER WITH 6 CELLS DRY R6 OBSERVING CORRECT POLARITY.

2. ISOLATE CIRCUIT AND CONNECT OHMMETER. POLARITY OF RED TERMINAL IS POSITIVE.

3. SELECT RANGE.

4. PRESS BUTTON AND READ.