Device cables

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This page contains information and teardown photos of various multimeter/datalogger/etc. PC connectivity cables and adapters.

Contents

Multimeters

Agilent U1173A

The Agilent U1173A is an IR-USB cable.

Hardware:

  • Prolific PL2303HX (max. baudrate 19200, according to the Agilent website)

Works with:

  • Agilent U1230/40/50/70 series
  • Note: For the U1240 series, the additional U1179A IR bracket is required.1

Where to buy:

Agilent U1177A

The Agilent U1177A is an IR-Bluetooth interface module.

Notes: 9600 baud, 8n1 settings on the PC. The protocol (AT commands) allows changing the baud rate to 19200, among other things.1 Default Bluetooth PIN: 1234. For the U1240 series, the additional U1179A IR bracket is required.2

Hardware:

  • CSR BC417...
  • Macronix MX...
  • PCB markings: U1177-26500, REV004, MSD-02

Works with:

  • Agilent U1230/40/50/70 series

Where to buy:
It is often given away free as a promotion with one of the Agilent U12xxA meters, but can also be purchased separately:

Amprobe 38SW-A

The Amprobe 38SW-A is an RS232 PC interface cable for the Amprobe 38XR-A multimeter. The "38SW-A" name is also used to refer to the respective PC software for use with the serial cable.

Hardware:

  • TODO.

Works with:

Where to buy:

APPA / ISO-TECH IC50

The IC50 is a USB PC interface cable for some APPA and ISO-TECH multimeters and thermometers.

Works with:

  • APPA 70 series multimeters (and ISO-TECH IDM 70 series clone)
  • APPA 50 series thermometer (and RS 50 series clone)

Where to buy:

APPA / ISO-TECH IC70

The IC70 is an RS232 PC interface cable for some APPA and ISO-TECH multimeters and thermometers.

Works with:

  • APPA 70 series multimeters (and ISO-TECH IDM 70 series clone)
  • APPA 50 series thermometer (and RS 50 series clone)

Where to buy:

Brymen BC-85X(-1)

Not compatible with BC-85Xa.

TODO.

Hardware:

  • TODO.

Works with:

  • Brymen BM857/BM859 (non-a versions)

Where to buy:

  • Available from Greenlee as DMSC-9 (not DMSC-9U).
  • TME (€26.82)

Brymen BR85X interface kit

Brymen BC-85Xa

Not compatible with BC-85X.

TODO.

Hardware:

  • TODO.

Works with:

  • Brymen BM857a/BM859a
  • Extech MM570A/MM560A/MP530A/MP510A

Where to buy:

  • Available from Extech in a kit with USB-to-serial converter and software disc, under the name SW-810a.
  • Mouser (€65.99)
  • TME (€60.60)

Extech SW-810a kit

This is a kit sold by Extech, containing the BC-85Xa RS232 cable, the BUA2303 USB-to-serial adapter, a USB cable, and a software disc.

Brymen BU-86X

TODO.

Hardware:

  • Cypress CY7C63743 enCoRe USB

Works with:

  • Brymen BM867/BM869

Where to buy:

Brymen BU-86X interface kit

Digitek DT4000ZC cable

The Digitek DT4000ZC (and the rebadged TekPower TP4000ZC) ship with this RS232 to 3.5mm stereo plug cable. The ring on the plug is left unconnected.

The cable works on the assumption that TX (pin 3) and DTR (pin 4) are at a fixed voltage and will not be toggled. TX should be below -3 V, and the resistor acts as a pull-down. DTR should be abouve 3V. The photodiode/phototransistor in the DMM will pull the RX pin above 3V when the IR diode is on.

Hardware:

  • SMD resistor between TX and RX pins.

Works with:

Where to buy:

  • The cable ships with the multimeter. It's unclear whether it can be bought standalone (without DMM).

Digitek DT4000ZC photos:

TekPower TP4000ZC photos:

Fluke IR189USB

The Fluke IR189USB is a USB interface cable for Fluke-18x and 28x series DMMs. It is a basic USB-serial cable, based on the FTDI FT232RL chip.

Fluke OC4USB

The Fluke OC4USB is a USB interface cable for the Fluke 120 series, 190 series scope meter, and the 430 series power quality analyzer.

Resources:

Fluke PM9080

The Fluke PM9080 is an RS232 interface cable for "digital hard-copy output to serial printer or remote control via a PC".

The max. supported baud rate is 57600.

Hardware: No active components are on the PCB.

Pinout:

  • black: pin 2 (RX)
  • brown: pin 3 (TX)
  • red: pin 7, 8 (RTS, CTS)
  • orange: pin 1, 4, 6 (DCD, DTR, DSR)
  • yellow: pin 5 (GND)


Works with:

  • Fluke scope meter test tools, power harmonics analyzers, graphical multimeters and multifunction counters.

Where to buy:

Resources:

Gossen Metrawatt

See Gossen Metrawatt page.

GreenLee DMSC-9U

TODO.

Hardware:

  • TODO.

Works with:

  • GreenLee DM-800 series, DML-430A

Where to buy:

  • TODO.

Metex 5-pin RS232 cable

This type of 5-pin RS232 cable is used in various Metex (and rebadged) multimeters.

The cable exists in two flavours, an older version with equal pin distance (can be inserted the wrong way) and a newer version with a gap between pins 3 and 4 (fits only one way).

Version 1

Hardware:

  • No active components.
  • 25-pin RS232 connector

Works with:

Where to buy:

  • The cable ships with the respective multimeter. It's unclear whether it can be bought standalone (without DMM).

Version 2

Hardware:

  • No active components.
  • 9-pin RS232 connector

Works with:

Where to buy:

  • The cable ships with the respective multimeter. It's unclear whether it can be bought standalone (without DMM).

MASTECH MAS345:

RadioShack 22-168:

DIY:

Cable pinout

Metex-connector pin (male) RS-232 25-pin female RS-232 DE9-female pin Signal (computer side) Remarks
1  7  5 GND
2  2  3 TX
3  4  7 RTS  Used to power receiver in multimeter, must be OFF.
4 20  4 DTR  Used to power receiver in multimeter, must be ON.
5  3  2 RX

UNI-T UT-D02

The UNI-T UT-D02 is an RS232 cable for various UNI-T multimeters (and rebranded models) with PC connectivity.

Hardware:

  • TODO.

Works with:

  • UNI-T UT61D/...
  • Voltcraft VC820/VC840/...

Where to buy:

UNI-T UT-D04

The UNI-T UT-D04 (see also uni-trend.com.cn) is a USB/HID cable for various UNI-T multimeters (and rebranded models) with PC connectivity.

There have been (at least) two versions of this cable, the older one with Hoitek HE2325U USB/HID chip, the newer one using a WCH CH9325 USB/HID chip.

See Device cables/Info#UNI-T_UT-D04 for more details (such as lsusb -v output) about the cable.

Hardware (old version):

  • Hoitek HE2325U

Hardware (new version):

Works with:

Where to buy:

other cable, but only with different silkscreen (another batch?)

Voltcraft sells rebranded, UNI-T made DMMs, and also ships with the same USB/HID cable, but with a Voltcraft logo/marking on it. It is likely that Voltcraft also shipped both the old and new version of the cable at some point.

V&A VA4000

The V&A VA4000 is a USB PC interface cable for various V&A multimeters.

It seems there have been at least two different revisions of the cable. The older one used a Sunplus SPCP825 USB-to-serial chip (see here, here, or also check the drivers from here), the newer revisions use a Prolific PL2303HX chip.

See Device cables/Info#V.26A_VA4000 for more details (such as lsusb -v output) about the cable.

Hardware (old cable version):

  • USB to serial chip: Sunplus SPCP825
  • Crystal: ?

Hardware (new cable version):

  • USB to serial chip: Prolific PL2303HX YR0903A
  • Crystal: 12MHz

Works with:

  • V&A VA18B, V&A VA-38

Where to buy:

Old cable with Sunplus SPCP825 chip from a V&A VA18B:

New cable with Prolific PL2303HX from a V&A VA18B:

Another cable shipped with a V&A VA40B (it has the same Prolific PL2303HX PCB as the V&A 18B above, but seem to have a thinner mechanical plug):

V&A VA4001

The V&A VA4001 is an RS232 PC interface cable for various V&A multimeters.

TODO.

Victor 86C USB cable

The Victor 86C PC interface cable (doesn't seem to have a specific name or part number) contains a USB/HID chip.

Hardware:

Works with:

  • Victor 86C. Maybe other Victor models(?)

Where to buy:

  • The cable ships with the Victor 86C. It's unclear whether it can be bought standalone (without DMM).

More information about the USB chip and the protocol it uses to communicate with the PC can be found on the Victor protocol page.

Sound level meters

Colead SL-5868P cables

Some distributors sell the Colead SL-5868P sound level meter with a set of two cables: one 3.5mm jack to female DB9, and one male DB9 to USB, which has a Prolific PL-2303 chip in the DB9. This cable does not work; the device's serial port needs a 2.5mm jack.

The SL-5868P is also available with bluetooth connectivity instead of serial.

Tondaj SL-814 cable

The Tondaj SL-814 sound level meter ships with this USB PC interface cable.

Hardware:

  • USB to serial chip: Prolific PL2303HX LFC10073A
  • Crystal: 12MHz

Works with:

Where to buy:

  • The cable ships with the Tondaj SL-814. It's unclear whether it can be bought standalone (without the sound level meter).

Programmable electronic loads

M133

The M133 (vendor unknown) cable ships with the ATTEN ATZ9711 programmable electronic load. It's unclear whether this is a custom cable for this device, or a generic RS232 isolator cable.

The 28-pin chip is a standard Prolific PL-2303HX serial-USB chip.

The other chip is presumably an optocoupler, but the vendor/model is unknown.

See also