AFJ Instruments LT32C/10 Manuale operativo - Pagina 16

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SECTION E: SWITCHING OPERATION

E.1 • GENERAL

Switching operations are defined in CISPR 14-1 as EUT supply current change; no other specifications

are reported.

AFJ LISN LT32C/10 offers current meter to read and measure Switching Operations and EUT

absorption current, as per CISPR 14-1 requirements.

Example of appliances for which the click rate N is derived from the number of switching operations:

- Thermostats for room heating equipment;

- Refrigerators;

- Freezers;

- Cooking with automatics plates;

- Appliances with one or more boiling plates controlled by thermostats;

- Irons;

- Sewing machine speed controls;

- Electro mechanical officer machines;

- Slide projector picture change device.

SECTION F: LT32C/10 LINE IMPEDANCE VERIFICATION PROCEDURE

F.1 • LINE IMPEDANCE MEASUREMENT

Test Equipment:

Network analyzer (f = 9kHz ÷ 30MHz)

AFJ LISN LT32C/10

50Ω BNC dummy load

SCHUKO to BNC adapter

Operations:

1. Switch the Network analyzer ON and wait for warming up enough according to the user manual;

2. Switch the LISN ON;

3. check that the Earth Floating LED is OFF;

4. connect the 50Ω dummy load to the BNC RF output of the LISN;

5. connect the network analyzer output port to the SCHUKO plug by means of the relevant adapter;

6. set the network analyzer for impedance measurement at the output port with the following

parameters:

a) Start Freq.:

b) Stop Freq.:

c) IFBW:

d) Power:

AFJ LT32C/10 LISN - Operating Manual - rev. 3.8 / 2019-01

10kHz

30MHz

300Hz

-10dBm

3311 Lewis Ave, Signal Hill CA 90755,

408-916-5750, www.reliantemc.com

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