Hioki DT4280 Series User manual

DT4280 Series
DIGITAL MULTIMETER
Remote Operation Manual
HIOKI E. E. CORPORATION
Aug. 2021
Revised edition 4

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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........................................11
5.3. Index of threshold of continuity check .........................................................11
5.4. Index of threshold of diode test.................................................................... 12
5.5. Index of standard impedance of dBm.......................................................... 12
5.6. Count value of abnormal data ..................................................................... 13
6. Compatible command with earlier products ................................14
Please note.............................................................................................14

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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 DT4281,DT4282 have to match the parameters the serial interface provided by the
host or terminal.
The following procedures will guide the user to set up interface parameters within the
DT4281,DT4282 to comply interface with the host.
Table.1
Item
Parameter
Setting
1
Baud Rate
19200 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 the meter executes a query command the return of the result will be in the following
format.
<Result> + <CR> <LF>
3.3. Data Types
Returned message is the ASCII string from the meter 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:REL:OFFS?
Query the offset value of the relative. (main)
:CALC:REL:OFFS2?
Query the offset value of the relative. (sub)
: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:BATT?
Query the battery level.
:SYST:DEFA
Returns meter settings to their factory defaults.
:SYST:REL
<0|1>
Set the relative.
:STAT?
Query the status of the meter.
:CALC:PEAK:MAX?
Query measured peak maximum count value.
:CALC:PEAK:MIN?
Query measured peak minimum count value.
:SYST:FILTER
<0|1>
Set the filter.
:SYST:PEAK
<0|1>
Set the peak.
:SYST:SLOW
<0|1>
Set the average.
:SYST:CLEAR
Put the clear command.
:SYST:BLA
<0|1>
Set the auto backlight.
:SYST:CPER
<0|1>
Set the DC4-20mA or DC0-20mA.
:SYST:CONDUCT
<data>
Set the threshold of continuity check.
:SYST:DIODE
<data>
Set the threshold of diode test.
:SYST:DBM
<data>
Set the standard impedance of dBm.
:SYST:INIT
Put the meter to power-on-reset state.

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5.Detail of Commands
5.1. Description of Commands
The DT4281,DT4282 only accepts the UPPER CASE command. (Except Unit etc.)
Table.4
Command
Explanation
QPID
Query the Meter model.
Syntax QPID
Response “DT4281”or “DT4282”
*IDN
Query the Meter identification.
Syntax *IDN?
Response <data×3>
<data> maker name, model number, serial, version
Example; “HIOKI,DT4281,121107517,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; “ACV, 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:REL:OFFS?
:CALC:REL:OFFS2?
Query the offset value of the relative. (main or sub)
Syntax :CALC:REL:OFFS? [:CALC:REL:OFFS2?]
Response <data×2>
<data> offset value, range
Example; “20, 600m”
: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”
: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”
(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: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:DEFA
Returns meter settings to their factory defaults.
Syntax :SYST: DEFA
Response “OK”
:SYST:REL
Set the relative.
Syntax :SYST: REL <data×1>
<data> “0” (off) or “1” (on)
Example; “:SYST: REL 1”
Response “OK” or “CMD ERR”
:STAT?
Query the status of the meter.
Syntax :STAT?
Response “<ABCDEFGHIJKLMNOPQRSTUVWX>” (24char)
A---Recording “0”(OFF) or “1”(MAX) or “2”(MIN)
B---Relative value (REL) “0”(OFF) or “1”(ON)
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---SLOW “0”(OFF) or “1”(ON)
P---Peak measurement “0”(OFF) or “1”(ON)
Q---Clump range “0”～“6”
R---DCmA percentage “0”(4-20mA)or“1”(0-20mA)
S---Index of threshold of continuity “0”～“3”
T---Index of threshold of diode “0”～“6”
UV---Index of impedance of dBm “00”～“19”
W---reserved “0”
X---reserved “0”

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Command
Explanation
:CALC:PEAK:MAX?
Query measured peak maximum count value.
Syntax :CALC:PEAK:MAX?
Response <data×1>
<data> count value
Example; “3000”
:CALC:PEAK:MIN?
Query measured peak minimum count value.
Syntax :CALC:PEAK:MIN?
Response <data×1> count value
Example; “-3000”
:SYST:FILTER
Set the filter.
Syntax :SYST: FILTER <data×1>
<data> “0” (off) or “1” (on)
Example; “:SYST: FILTER 1”
Response “OK” or “CMD ERR”
:SYST:PEAK
Set the peak.
Syntax :SYST: PEAK <data×1>
<data> “0” (off) or “1” (on)
Example; “:SYST: PEAK 1”
Response “OK” or “CMD ERR”
:SYST:SLOW
Set the average.
Syntax :SYST: SLOW <data×1>
<data> “0” (off) or “1” (on)
Example; “:SYST: SLOW 1”
Response “OK” or “CMD ERR”
:SYST:CLEAR
Put the clear command.
Syntax :SYST: CLEAR
Response “OK”
: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:CPER
Set the DC4-20mA or DC0-20mA.
Syntax :SYST: CPER <data×1>
<data> “0” (4-20mA) or “1”(0-20mA)
Example; “:SYST: CPER 1”
Response “OK” or “CMD ERR”

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Command
Explanation
:SYST: CONDUCT
Set the threshold of continuity check.
Syntax :SYST: CONDUCT <data×1>
<data> Index of threshold “0”～“3”
Example; “:SYST: CONDUCT 1”
Response “OK” or “CMD ERR”
:SYST:DIODE
Set the threshold of diode test.
Syntax :SYST: DIODE <data×1>
<data> Index of threshold “0”～“6”
Example; “:SYST: DIODE 1”
Response “OK” or “CMD ERR”
:SYST:DBM
Set the standard impedance of dBm.
Syntax :SYST: DBM <data×1>
<data> Index of impedance “00”～“19”
Example; “:SYST: DBM 15”
Response “OK” or “CMD ERR”
:SYST:INIT
Put the meter to power-on-reset state.
Syntax :SYST: INIT
Response “OK”

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5.2. Combination response string function and range
Table.5
Function
Range
ACV
60m, 600m, 6, 60, 600, 1000
DCV
60m, 600m, 6, 60, 600, 1000
dBm
600
dBV
60
ACDCV
6, 60, 600, 1000
SEPV
60m, 600m, 6, 60, 600, 1000
CONT
600
DIODE
4
RES
60, 600, 6k, 60k, 600k, 6M, 60M, 600M
TEMP
800
CAP
1n, 10n, 100n, 1u, 10u, 100u, 1m, 10m, 100m
CLAMP
10, 20, 50, 100, 200, 500, 1000
nS
600
DCuA
600u, 6000u
ACuA
600u, 6000u
DCmA
60m, 600m
ACmA
60m, 600m
DC_4_20mA
60m
DCA
6, 10
ACA
6, 10
FREQ
10, 100, 1k, 10k, 100k, 1000k
5.3. Index of threshold of continuity check
Table.6
Index
Threshold
0
20Ω
1
50Ω
2
100Ω
3
500Ω

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5.4. Index of threshold of diode test
Table.7
Index
Threshold
0
0.15V
1
0.5V
2
1.0V
3
1.5V
4
2.0V
5
2.5V
6
3.0V
5.5. Index of standard impedance of dBm
Table.8
Index
Standard Impedance
Index
Standard Impedance
0
4Ω
10
150Ω
1
8Ω
11
200Ω
2
16Ω
12
250Ω
3
32Ω
13
300Ω
4
50Ω
14
500Ω
5
75Ω
15
600Ω
6
93Ω
16
800Ω
7
110Ω
17
900Ω
8
125Ω
18
1000Ω
9
135Ω
19
1200Ω

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5.6. Count value of abnormal data
Response of count value query return the values shown in Table.9 in the case of abnormal data.
Table.9
Type of abnormal value
Count value
Over Range value
1000000
Invalid data
2000000
Open value (TEMP function)
3000000
Internal error value (TEMP function)
4000000

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6.Compatible command with earlier products
Table.10 shows the command compatibility with earlier products 3800 series.
Table.10
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.