PeakTech 4390A

From sigrok
Jump to navigation Jump to search
The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.
PeakTech 4390A
Peaktech 4390a metex m-3860m mugshot.png
Status supported
Source code serial-dmm
Counts 4000
IEC 61010-1
Connectivity RS232
Measurements voltage, current, frequency, hFE, logic, continuity, diode, resistance, temperature, capacitance, power
Features true-rms, signal-out, 3 sub-displays, backlight, bargraph, auto hold, data hold, range hold, min/max, relative offset, comparision, 10 reading memory

The PeakTech 4390A is a 4000 counts handheld digital multimeter with RS232 connectivity.

This is a rebadged Metex M-3860M multimeter.

Note: This is not the same device as the PeakTech 4390, despite the very similar name.

Hardware

Main ICs:

Miscellaneous ICs:

  • Serial EEPROM: Atmel AT93C46 (datasheet) (markings: ATMEL 348 / 93C46)
  • Optocoupler for RS232: 2x Lite-On 817B (datasheet) (markings: L0419 / 817B / Y)
  • OpAmp: 2x 2904 (datasheet) (markings: 2904 / 4169B / JRC)
  • Low Offset Voltage OpAmp: OP-07 (datasheet) (markings: OP-07 / 4051B / JRC)
  • OpAmp: NJM062/TL062 (datasheet) (markings: 062 / 3138B / JRC)
  • Quad 2-Input NAND Gate: ON Semi 74HC00A (datasheet) (markings: HC00A / ON PBK340)
  • Quad Multiplexer: ON Semi 14066B (datasheet) (markings: 14066B / ON PPM426)
  • 555 Timer: Intersil ICM7555 (datasheet) (markings: i 7555 / IBA / L044FCL)
  • Quad 2-Input NAND Schmitt Trigger: 74HC132D (datasheet)
  • Dual Decade Ripple Counter: 74HC390D (datasheet)

Fuses:

  • 250V, 15A (N65)
  • 250V, 800mA

Photos

Multimeter:

RS232 cable:

See Device_cables#Metex_5-pin_RS232_cable (Version 2).

Protocol

See Multimeter_ICs#Metex_14-byte_ASCII.

The device sends 4 * 14 bytes. The first 14 bytes represents the main display and then the three sub displays from left to right (left, middle, right).

Resources