2014-02-28

Product Information

The Agilent U1273A is a handheld digital multimeter (DMM) with OLED Display. It has the following capabilities and specifications:

Voltage Measuring Range DC: 30mV to 1kV

Voltage Measuring Range AC: 30mV to 1kV

Current Measuring Range DC: 300µA to 10A

Current Measuring Range AC: 300µA to 10A

Resistance Measuring Range: 30ohm to 300Mohm

Frequency Measuring Range: 99.999Hz to 999.99kHz

Capacitance Measuring Range: 10nF to 10mF

Temperature Measuring Range: -200°C to +1372°C

No. of Digits: 4-1/2

DMM Response Type: True RMS

DMM Functions: AC/DC Current, AC/DC Voltage, Capacitance, Continuity, Diode, Frequency, Resistance, Temperature

Ranging: Auto, Manual

Display Count: 30000

SVHC: No SVHC (20-Jun-2013)

Bandwidth: 100kHz

Manufacturers Warranty: 3 Years

Description

Handheld Digital Multimeter with an OLED 4.5 Digit Display, Water and Dust Resistant

The U1273A is shaped perfectly to fit in your hand, with or without gloves on. Its nonslip ergonomic shape enables you to carry your DMM and perform measurements on the go easily. Additionally, the controls are easy to operate due to the large knob and buttons.

Organic LED (OLED) display for high brightness level and wider viewing angles (up to 160 degrees)

Features set that meet traditional industrial requirements and improve productivity and safety

Intelligent features to improve productivity and safety

Visual and audible continuity indication in noisy environments

Easy access to fuse for simplified maintenance

Easy connectivity to PC and internal memory (up to 10,000) for data logging

Large rotary switch and buttons that are easy to operate

Dust and water resistant casing (IP 54 compliant)

Compatible with U1177A IR-Bluetooth adapter for remote monitoring & datalogging

Standard test leads, test probes with 4-mm tips, K-type thermocouple and adapter, 4x AAA batteries and Quick Start Guide.

Industrial

Maintenance & Repair

Test & Measurement

Accessories

IR-Bluetooth Adapter

IR-USB Adapter

The IR-USB Adapter

The adapter shows up in dmesg as:

Serial Protocol

The communication with the U1273A works with a simple text based protocol.
Open the virtual serial port with the settings 9600, 8, n, 1.
The line break is a simple \n newline character.

The serial protocol of the multimeter is very similar to the Agilent U1272A, which is in part described in this forum post. Here is the table of commands found there:

Command

Explanation

*IDN?

Identification

SYST:BATT?

Request batter status. Not sure what units are returned.

CONF?

Request confirguration (e.g. “VOLT:AC +5.00000000E+00,+1.00000000E-04″)

STAT?

Request unit status. I have not decoded the meaning of the return value for this. (e.g. “000000I00302L00004001″)

FETC?

Request current reading (and FETC? @2 returns current reading on secondary display)

*RST

Meter reset

SYST:VERS?

Unknown, my meter returns 1990.0

SYST:ERR?

Unknown, probably returns the last error

READ?

Request current reading. I don’t believe that the @2 option works for this command. If your meter supports logging (manual or auto) then the following commands can be used:

LOG:AUTO xx

Request value of auto-log position xx

LOG:HAND xx

Request value of manual log position xx

A more complete description of the protocol is to be found in the dmmutils project’s files.

Example Conversation over the IR-USB-Adapter

created with this Python code:

Third Party Software

dmmutils

dmmutils

Python Script by drjoe047

Found here:

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