UNI-T UT60A Manual do Utilizador descarregar pdf (Página 12)

Low and high voltage parts are neatly separated, and there is enough space between the high

voltage PCB traces. You can also see the RF transceiver near the shielded box (U104; Freescale

MC13201), and a lot of test pins, which are probably used for calibration. There are a separate IR

transmitter and receiver, which shows that the communication link between display module and

base station is bidirectional. The shielded box contains several discrete components and an unknown

IC (U101; LTFLK2 387248). According to a document on the Fluke website, the heart of the

multimeter is a Texas Instruments microcontroller (U102; MSP430F449, 60 kB Flash, 2048 B RAM).

Calibration data is stored together with the operating code in the Flash memory, so it is not easy to

calibrate the meter yourself. The main processor is probably located on the back side of the PCB.

Further disassembling of the meter takes a lot of effort because the rotary knob must be removed, so

let us look at the inside of the display module instead.

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UNI-T UT60A Manual do Utilizador Página 12