UNI-T UT61C

2022-03-08T09:54:20Z

SmithChart: Add hints on how to use this device. Mostly: Because it took me about 2 hours to figure out how to activate remote transmission on this devices. Examples are based on the UT61E page.

{{Infobox multimeter
| image = [[File:Uni-t ut61c mugshot.png|180px]]
| name = UNI-T UT61C
| status = supported
| source_code_dir = uni-t-dmm
| counts = 6000
| categories = CAT II (600V) / CAT III (300V)
| connectivity = [[Device_cables#UNI-T_UT-D02|RS232]] / [[Device_cables#UNI-T_UT-D04|USB]]
| measurements = voltage, current, resistance, capacitance, frequency, duty cycle, diode, continuity, temperature
| features = autorange, data hold, min/max, rel, bargraph, backlight
| website = [http://www.uni-trend.com/UT61C.html uni-trend.com]
}}

The '''UNI-T UT61C''' is a 6000 counts, CAT II (600V) / CAT III (300V) handheld digital multimeter with RS232 or USB connectivity.

See [[UNI-T UT61C/Info]] for more details (such as '''lsusb -v''' output) about the device.

== Hardware ==

'''Multimeter''':
* '''Multimeter IC''': [[Multimeter_ICs#Fortune_Semiconductor_FS9922-DMM4|Fortune Semiconductor FS9922-DMM4]] ([http://www.ic-fortune.com/upload/Download/FS9922-DMM4-DS-11_EN.pdf datasheet])
* '''Crystal''': 4MHz (markings: "3.999")
* '''Fuses''': 10A/240V and 1A/240V (HRV fuses)

'''RS232 cable''':

See [[Device cables#UNI-T_UT-D02]].

'''USB cable''':

See [[Device cables#UNI-T_UT-D04]].

== Photos ==

'''Multimeter''':

<gallery>
</gallery>

'''RS232 cable''':

See [[Device cables#UNI-T_UT-D02]].

'''USB cable''':

See [[Device cables#UNI-T_UT-D04]].

== Usage ==
The DMM does not transmit samples after power up.
You need to long-press the <tt>REL Δ</tt> button to activate the remote measurement.
This also deactivates the auto power-off function of the device.

The following [[sigrok-cli]] command can be used to receive five measured values from a device connected via USB (note that the USB VID/PID after the '''<tt>conn</tt>''' option needs to be changed depending on the exact USB adapter cable used):
<source lang="bash">
$ sigrok-cli --driver=uni-t-ut61c:conn=1a86.e008 -O analog --samples 5
</source>

If your meter has a serial (RS-232) cable connected to a USB-to-serial adapter, a different driver is used. Example for ttyUSB0:
<source lang="bash">
$ sigrok-cli --driver=uni-t-ut61c-ser:conn=/dev/ttyUSB0 -O analog --samples 5
</source>
Same example for COM1 (Windows), please note the special syntax for specifying the COM port:
<source lang="text">
C:\> sigrok-cli --driver=uni-t-ut61c-ser:conn=\\.\COM1 -O analog --samples 5
</source>

'''<tt>--samples <n></tt>''' stops acquisition after the specified number of measurements, while '''<tt>--continuous</tt>''' does not stop. Type just '''sigrok-cli''' by itself for a summary of options.
More information on drivers can be found in the [http://sigrok.org/gitweb/?p=libsigrok.git;a=blob;f=README.devices README.devices] file of the [[libsigrok]] source tree.

== Protocol ==

See [[Multimeter_ICs#Fortune_Semiconductor_FS9922-DMM4]] for the DMM IC protocol. Depending on the cable, additional transport-specific decoding is needed, though.

== Resources ==

* [http://www.uni-trend.com/manual2/UT61English.pdf Manual]
* [http://www.uni-trend.com/Web%20site/DMM%20Software/UT61C%20setup.exe Vendor software]

[[Category:Device]]
[[Category:Multimeter]]
[[Category:Supported]]

sigrok - User contributions [en]

UNI-T UT61C