PeakTech 4390A
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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:
- Multimeter IC: Metex 00M38M03 (markings: METEX / 00M38M03 / 663 / 0411KK002)
- A/D Converter: Maxim MAX134 3 3/4 Digit DMM Circuit (datasheet)
- True RMS Converter: Analog Devices AD737 (datasheet)
- Power Metering IC: Sames SA9102CSA (datasheet)
- Voltage Reference 1.2V: ICL8069 (datasheet) (markings: CC / 8069 / G301AC)
- LCD Controller: Epson S1D12708F00A1 (markings: EPSON JAPAN / S1D12708F00A1 / F04202336)
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).