Hioki DT4261 User manual

DT4261
DIGITAL MULTIMETER
Remote Operation Manual
HIOKI E. E. CORPORATION
Aug. 2021
Revised edition 1

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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 ..................................................................... 10
6. Compatible command with earlier products .................................11
Please note ..............................................................................................11

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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 DT4261 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
Parameter
Setting
1
Baud Rate
9600 bps
2
Data Length
8 bit
3
Parity Check
None
4
Stop Bit
1 bit

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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.
-1.000000E+02
<Boolean>
String ASCII-encoded byte, is return
for the setting query.
0 or 1
<Literal>
ASCII string
ACV, DCV

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4.Summary of Commands
Table.3
Command
Parameter
Description
QPID
Query the Meter model.
*IDN
Query the Meter identification.
:SYST:RST
Put the meter to reset.
:SYST:LLO
Put the meter into the local lockout state.
:SYST:GTL
Put the meter into the local state.
:CONF?
Query the main function of the display.
:CONF2?
Query the sub function of the display.
:CONF
<function,range>
Configure the range.
:FETCCNT?
Query main measured count value.
:FETCCNT2?
Query sub measured count value.
:CALC:STAT:MAX?
Query measured maximum count value.
:CALC:STAT:MIN?
Query measured minimum count value.
:CALC:STAT:AVER?
Query measured average count value.
:CALC:STAT:PEAKMAX?
Query measured maximum peak count
value.
:CALC:STAT:PEAKMIN?
Query measured minimum peak count value.
:SYST:APS
<0|1>
Set the APS.
:SYST:BEEP
<0|1>
Set the action of the beeper.
:SYST:BLIT
<0|1>
Set the backlight.
:SYST:BLA
<0|1>
Set the auto backlight.
:SYST:BATT?
Query the battery level.
:SYST:ZEROADJ
<0|1>
Execute zero adjustment.
:SYST:FILTER
<0|1>,<100|500>
Set the filter.
:MEAS:AUTOV?
Query the status DC or AC of AutoV
function.
:SYST:INIT
Put the meter to power-on-reset state.
:STAT?
Query the status of the meter.

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5.Detail of Commands
5.1. Description of Commands
The DT4251,DT4252,DT4253,DT4254,DT4255,DT4256 only accepts the UPPERCASE
command. (Except Unit etc.)
Table.4
Command
Explanation
QPID
Query the Meter model.
Syntax QPID
Response “DT4261”
*IDN
Query the Meter identification.
Syntax *IDN?
Response <data×3>
<data> maker name, model number, serial, version
Example; “HIOKI,DT4261,210601234,Ver 1.00”
:SYST:RST
Put the meter to reset.
Syntax :SYST:RST
Response “OK”
:SYST:LLO
Put the meter into the local lockout state.
Syntax :SYST:LLO
Response “OK”
:SYST:GTL
Put the meter into the local state.
Syntax :SYST:GTL
Response “OK”
:CONF?
:CONF2?
Query the function of the display.
Syntax :CONF? [:CONF2?]
Response <data×2>
<data> function,range
Example; “DCV, 600m”
→ 5.2 Combination response string function and range
:CONF
Configure the range.
Syntax :CONF <data×2>
<data> function,range
Example; “:CONF RES, 60k”
→5.2 Combination response string function and range
Response “OK” or “CMD ERR” or “EXE ERR”

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Command
Explanation
:FETCCNT?
:FETCCNT2?
Query measured count value.
Syntax :FETCCNT? [:FETCCNT2?]
Response <data×1>
<data> count value
Example; “3000”
:CALC:STAT:MAX?
Query measured maximum count value. (1)
Syntax :CALC:STAT:MAX?
Response <data×1>
<data> count value
Example; “5000”
:CALC:STAT:MIN?
Query measured minimum count value. (1)
Syntax :CALC:STAT:MIN?
Response <data×1>
<data> count value
Example; “2000”
:CALC:STAT:AVER?
Query measured average count value. (1)
Syntax :CALC:STAT: AVER?
Response <data×1>
<data> count value
Example; “3500”
:CALC:STAT:PEAK
MAX?
Query measured maximum peak count value. (1)
Syntax :CALC:STAT:PEAKMAX?
Response <data×1>
<data> count value
Example; “800”
:CALC:STAT:PEAK
MIN?
Query measured minimum peak count value. (1)
Syntax :CALC:STAT:PEAKMIN?
Response <data×1>
<data> count value
Example; “-800”
:SYST:APS
Set the APS.
Syntax :SYST:APS <data×1>
<data> “0” (off) or “1” (on)
Example; “:SYST:APS 1”
Response “OK” or “CMD ERR”
(1) Since the internal count value is returned, the value beyond the display range is not
guaranteed to be accurate.

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Command
Explanation
:SYST:BEEP
Set the action of the beeper.
Syntax :SYST:BEEP <data×1>
<data> “0” (off) or “1” (on)
Example; “:SYST:BEEP 1”
Response “OK” or “CMD ERR”
:SYST:BLIT
Set the backlight.
Syntax :SYST:BLIT <data×1>
<data> “0” (off) or “1” (on)
Example; “:SYST:BLIT 1”
Response “OK” or “CMD ERR”
:SYST:BLA
Set the auto backlight.
Syntax :SYST: BLA <data×1>
<data> “0” (off) or “1” (on)
Example; “:SYST: BLA 1”
Response “OK” or “CMD ERR”
:SYST:BATT?
Query the battery level.
Syntax :SYST:BATT?
Response <data×1>
<data> Four steps remaining battery level.
“3” or “2” or “1” or “0”
:SYST:ZEROADJ
Execute zero adjustment.
Syntax :SYST:ZEROADJ
Response “OK”
or “CMD ERR” (Fail, or unsupported function)
:SYST:FILTER
Set the filter.
Syntax :SYST: FILTER <data×2>
<data1> “0” (off) or “1” (on)
<data2> “100” (100Hz) or “500”(500Hz)
Example; “:SYST: FILTER 1,100”
Response “OK” or “CMD ERR”
:MEAS:AUTOV?
Query the status DC or AC of AutoV function.
Syntax :MEAS: AUTOV?
Response “0”(DC) or “1”(AC)
or “EXE ERR”(Other than AutoV or LoZV function)
:SYST:INIT
Put the meter to power-on-reset state.
Syntax :SYST: INIT
Response “OK”

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Command
Explanation
:STAT?
Query the status of the meter.
Syntax :STAT?
Response “<ABCDEFGHIJKLMNOPQRSTUVWX>” (24char)
A---Recording “0”(OFF) or “1”(MAX) or “2”(MIN)
or “3”(AVG) or “4”(PEAKMAX) or “5”(PEAKMIN)
B---Relative value (REL) “0”(OFF)
C---Filter “0”(OFF) or “1”(ON)
D---Beep “0”(OFF) or “1”(ON)
E---APS “0”(OFF) or “1”(ON)
F---Battery level “0”～“3”
G---Input warning “0”(normal) or “1”(warn)
HI---Rotary position “00”～“99”(from OFF)
J---HOLD “0”(OFF) or “1”(ON)
K---Auto Hold “0”(OFF) or “1”(ON)
L---Auto Range “0”(OFF) or “1”(ON)
M---Backlight “0”(OFF) or “1”(ON)
N---Backlight Auto OFF “0”(OFF) or “1”(ON)
O---Filter Cut-off frequency “0”(100Hz) or “1”(500Hz)
P---reserved “0”or “1”
Q--- reserved “0”or “1”
R--- reserved “0”or “1”
S--- reserved “0”or “1”
T--- reserved “0”
U--- reserved “0”
V--- reserved “0”
W---reserved “0”or “1”
X---reserved “0”

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5.2. Combination response string function and range
Table.5
Function
Range
AutoV
600m, 6, 60, 600, 1000
DCV
600m, 6, 60, 600, 1000
ACDCV
6, 60, 600, 1000
ACV
6, 60, 600, 1000
HzV
100, 1k, 10k, 100k
LoZV
600
CONT
600
DIODE
2
RES
600, 6k, 60k, 600k, 6M, 60M
CAP
1u, 10u, 100u, 1m, 10m
CLAMP
10, 20, 50, 100, 200, 500, 1000
ACA
600m, 6, 10
HzA
100, 1k, 10k
AutoA
600m, 6, 10
DCA
600m, 6, 10
ACDCA
600m, 6, 10
5.3. Count value of abnormal data
Response of count value query return the values shown in Table.6 in the case of abnormal data.
Table.6
Type of abnormal value
Count value
Over Range value
1000000
Invalid data
2000000
Open value
3000000
Internal error value
4000000

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6.Compatible command with earlier products
Table.7 shows the command compatibility with earlier products 3800 series.
Table.7
Command
Description
*CLS
Clear the system Error Queue.
*RST
Put the meter to power-on-reset state.
LLO
Put the meter into the local lockout state when in remote control.
This means no local key operation at the front panel is allowed
during remote control.
GTL
Put the meter into the local state, clearing the remote state and
front panel lockout.
FETC? [@2]
Return the primary or secondary function value of output butter.
Response：<NR3>
Please note
-1. Contents subject to change without notice.
-2. This document contains copyrighted content.
-3. It is prohibited to copy, reproduce, or modify the content of this document without permission.