Hioki DT4251, DT4252, DT4253, DT4254, DT4255 Operation Manual

DT4250 Series

DIGITAL MULTIMETER

Remote Operation Manual

HIOKI E. E. CORPORATION

May, 2015

Edition 2

DT4250 series DIGITAL MULTIMETER Remote Operation Manual

Contents

1. Remote Interface Overview .............................................................. 3

2. Interface Parameters ........................................................................ 3

3. About Command ............................................................................... 4

3.1. Terminator ...................................................................................................... 4

3.2. Return result .................................................................................................. 4

3.3. Data Types ...................................................................................................... 4

4. Summary of Commands ................................................................... 5

5. Detail of Commands ......................................................................... 6

5.1. Description of Commands .............................................................................. 6

5.2. Combination response string function and range ....................................... 10

5.3. Count value of abnormal data ...................................................................... 11

6. Compatible command with earlier products ................................. 11

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DT4250 series DIGITAL MULTIMETER Remote Operation Manual

1. Remote Interface Overview

Step1. Connect the USB cable to the USB port on the computer.

Step2. Once the USB cable is connected and the USB driver is installed, a virtual COM port

is created on the computer.

2. Interface Parameters

In order to operate the meter via a host computer or terminal, the parameters in interface

within the DT4251,DT4252,DT4253,DT4254,DT4255,DT4256 have to match the parameters

the serial interface provided by the host or terminal.

The following procedures will guide to set up interface parameters within these models.

Table.1

Item

1 Baud Rate 9600 bps

2 Data Length 8 bit

3 Parity Check None

4 Stop Bit 1 bit

Parameter Setting

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DT4250 series DIGITAL MULTIMETER Remote Operation Manual

3. About Command

3.1. Terminator

A terminator is a character sent by a host, which identified the end of a command string.

A valid terminator consists of two-byte data.

<CR> (Carriage Return, ASC(&H0D) )

<LF> (Line Feed, ASC(&H0A) )

3.2. Return result

After execution of query command, digital multimeter will return the following format.

<Result> + <CR> <LF>

3.3. Data Types

Returned message is the ASCII string from the digital multimeter responding to a query.

Table.2

Data Type Explanation Example

<NR1> An integer +10000, -10000, 123, -100

<NR2> This numeric representation has an

explicit radix point.

+13.234, -.00002, 3.4567

<NR3> This representation has an explicit

radix point and an exponent.

<Boolean> String ASCII-encoded byte, is return

for the setting query.

<Literal> ASCII string ACV, DCV

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-1.000000E+02

0 or 1