IET Labs DE-5000, Руководство пользователя и обслуживания

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Chapter 2: Operation
2.1. How to obtain optimum precision
To access optimum precision for all L , C , and R measurements,
especially at the highest and the lowest ranges, zero the instrument
before use (pages 16-18).
To secure the specified accuracy, connect the device under test
(DUT) to the measuring socket, or use either TL-21 (standard
accessory) or TL-22 (optional accessory).
If you are using test leads other than the ones specified above, use
4-wire leads and avoid using long lead wires to reduce measurement
errors.
2.2. Default settings
When the power is turned on, the monitor displays all symbols for 2
seconds as shown below.