Instruction Book 2-56010R

A.W.W.  VOLTOHMYST  TYPE   A56010

(Serial No. 153 onwards)

Amalgamated Wireless (Australasia) Limited

47 York Street,

SYDNEY

1-56010R                                                                                                                                            (i)

INDEX

SECTION                                                                                                                                   Page No.

1.                            DESCRIPTION:

                            1.1              Application                                                                                                  1

                            1.2              Mechanical Construction                                                                      3

                            1.3              Design Characteristics and Circuit Description                            3

                            1.4              Summary of Controls, Facilities and Electrical

                                          Characteristics                                                                                                  6

                                          1.4.1              Facilities                                                                                    6

                                          1.4.2              Controls and Input Connections                                          7

                                          1.4.3              Electrical Characteristics                                                        7

                            1.5              Probes and Cables used with the Voltohmyst              A56010              9

                                          1.5.1              Cables and Probes Supplied with the Instrument              9

                                          1.5.2              Probes Not Normally Supplied with the Instrument.              10

2.              METHOD OF USE:

                            2.1              Warning Notes                                                                                    13

                            2.2              Setting up Procedures                                                                                    14

                            2.3              D.C. Voltage Measurement                                                                      14

                                          (using D.C. and Direct Probes)

                            2.4               Centre-zero Readings                                                                                    15

                            2.5              A.C. Voltage Measurement                                                                     

                                          (With Direct probe alone)                                                                      15

                            2.6              Resistance Measurement                                                                      16

                                          2.6.1              Normal Measurement of Resistance

up to 1,000 M.ohm                                                                                    16

                                          2.6.2              High resistance (insulation) Measurement                             16

                            2.7              Current Measurement                                                                                    17

                            2.8              Measurement and Calculation of dbm                                          17

3.              MAINTENANCE:             

                            3.1              Valve Replacement                                                                                    19

                            3.2              Checking the Condition of the 1.5V. cell                                          19

                            3.3              Electrical Balance Check                                                                      19

                            3.4              Calibration                                                                                                  20

                                          3.4.1              D.C. Calibration                                                                      20

                                          3.4.2              A.C. Calibration                                                                      21

                                          3.4.3              A.C. Compensation Adjustment (C2)                                          21

4.               COMPONENT SCHEDULE:                                                                                                  23

5.               DIAGRAMS:

                            Voltohmyst A56010                                                                      Drg. No.     Fig. No.

                                          Circuit                                                                                    5601002              7

                                          Probes and Cables used with Voltohmyst              56010D7              8