UT3500 series
User Manual
58
The SCPI protocol defines a set of standard syntaxes and commands for controlling
programmable test and measurement instruments. SCPI commands are transmitted using
the ASCII character string and passed into the instrument through the physical transport
layer. The command consists of a series of keywords, and some also need to include
parameters. In the protocol, the command is specified as the following form: CONFigure.
In use, you can either write the full name or an abbreviation containing only uppercase
letters. The feedback of the instrument to the query command is also the ASCll code. In
fact, for simple applications (such as PLC), you only need to translate instructions into HEX
bytes and then transfer them in bytes.
Modbus (RTU) Protocol:
The Modbus protocol is a universal language used in electronic control units, and is mainly
used in industrial field bus protocols. It is a communication standard for industrial control
equipment such as PLC and touch screen.
11. Technical Index
11.1 Technical Index of the Product
Table 11-1 Measurement Index of Resistance and Voltage
Resistance Measurement
Resistance Range
<0>3m
Ω
<1>30m
Ω
<2>300m
Ω
<3>3
Ω
<4>30
Ω
<5>300
Ω
<6>3k
Ω
Maximum Display
Value
3.1000 m
Ω
31.000
m
Ω
310.00 m
Ω
3.1000
Ω
31.000
Ω
310.00
Ω
3200.0
Ω
Resolution
0.1
μΩ
1
μΩ
10
μΩ
100
μ
Ω
1m
Ω
10 m
Ω
100 m
Ω
Measurement Current
100mA
100mA
10mA
1mA
100
μ
A
10
μ
A
10
μ
A
Frequency of
Measurement Current
1kHz
±
0.2Hz
Precision
Slow
±
0.5%rdg.
±
10dgt
±
0.5%rdg.
±
5dgt
Medium
±
0.5%rdg.
±
15dgt
±
0.5%rdg.
±
7dgt
Fast
±
±
0.5%rdg.
±
7dgt