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: