4 Using Instrument Conveniently. Hioki DT4282, DT4281
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4
Using Instrument Conveniently
COPY: MEAS̲ dBm
OVER 最大入力範囲超え
SLOW dBV
MEM
過負荷検出
交流電流 ( クランプ入力 )
4
Using Instrument
Conveniently
4.1 Selecting the Measurement Range
Auto or Manual range can be selected. In the case of measurement where the desired range can be selected, [ RANGE: ] lights up in the bottom left of the display.
• Auto range Sets the optimum range automatically in accordance with the actual measurement.
• Manual range Sets the range and fixes it specifically.
Measuring with the auto range
READ
4-20
抵抗
1
2
3
4
When the manual range is set, pressing for at least 1 second changes to the auto range.
The instrument automatically selects the optimum measurement range.
5
COPY: MEAS̲DCA
6
Press .
Each time the key is pressed, a higher range is specified.
When the key is pressed at the highest range, the lowest range is specified once again.
Example: When measuring the AC voltage
60 mV 600 mV 600 V 1000 V
0adj 後
7
When the measurement function is switched using the rotary switch or
SHIFT , or when the peak measurement is canceled, the auto range is enabled.
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Selecting the Measurement Range
Range display list
ACV, DCV
DC+ACV
Ω
60 mV, 600 mV, 6 V, 60 V, 600 V, 1000 V
6 V, 60 V, 600 V, 1000 V
60 Ω , 600
600 M Ω
Ω , 6 k Ω , 60 k Ω , 600 k Ω , 6 M Ω , 60 M Ω ,
(Electrostatic capacity)
DCA, ACA
AC clamp
1 nF, 10 nF, 100 nF, 1 μF, 10 μF, 100 μF, 1 mF, 10 mF,
100 mF
600 µA, 6000 μA, 60 mA, 600 mA, 6 A, 10 A
10 A, 20 A, 50 A, 100 A, 200 A, 500 A, 1000 A
PEAK (DCV)
PEAK (ACV)
6 V, 60 V, 600 V, 1000 V
18 V, 180 V, 1500 V
PEAK (DC+ACV) 18 V, 180 V, 1500 V
PEAK (DCA/ACA) 1200 µA, 12000 µA, 120 mA, 1200 mA, 12 A, 15 A
PEAK (AC clamp) 30 A, 60 A, 150 A, 300 A, 600 A, 1500 A, 3000 A
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COPY: MEAS̲ dBm
SLOW dBV
MEM
OVER 最大入力範囲超え 過負荷検出
交流電流 ( クランプ入力 )
MAX
クランプ(レンジ設定)
COPY: MEAS̲ 4-20
READ
RANGE
導通ショート
REL
マニュアルレンジ
Retaining the Measured Value
4.2 Retaining the Measured Value
The measured value is retained manually or automatically.
• Manually When HOLD is pressed, the measured value is retained.
• Automatically When HOLD is pressed and held for at least 1 second, auto mode starts. When the measured value stabilizes, it is retained.
1
2
3
FILTER To retain the measured value, press . ( lights up and the measurement value is retained.)
(
To cancel the hold state, press it again.
goes off.)
Automatically retaining the measured value when the value stabilizes (AUTO HOLD)
ΔT
オートホールド
4
5
(
Press for at least 1 second.
lights up.)
(
When the measured value stabilizes, a beeping sound is generated and the value is retained.
lights up.)
If HOLD is pressed again, or the input signal exceeds the dead zone threshold again (see table on the next page), or when the range is switched internally and the measured value is stabilized once again, the hold state is canceled. ( goes off.)
To disable the auto hold function, press it for at least 1 second again. ( goes off.)
57
6
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Retaining the Measured Value
• If the input signal is too small for the relevant range (dead zone threshold p. 58), the measured value cannot be automatically retained.
• If the difference between the current and previous measured values remains less than the counts in the stable field of the table below, the instrument determines the current value has stabilized.
Dead zone threshold
Function
AC voltage
DC voltage
DC voltage + AC voltage
Continuity check
Diode test
Resistance
Conductance
DC
µA mA
A
AC
µA mA
A
AC (clamp input)
* No function is available for the mV range.
Stable (count)
1200, 200
(1000 V range)
1200, 200
(1000 V range)
1200, 200
(1000 V range)
100
80
1200, 120
(60/600M Ω range)
1200
1200
1200
1200, 200
(10 A range)
1200
1200
1200, 200
(10 A range)
5% of the range
58
Dead zone threshold
(count)
1200, 200
(1000 V range) *
1200, 200
(1000 V range) *
1200, 200
(1000 V range)
5900
3520
58800, 5880
(60/600M Ω range)
1200
1200
1200
1200, 200
(10 A range)
1200
1200
1200, 200
(10 A range)
5% of the range
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When the Measured Value Fluctuates (SLOW)
4.3 When the Measured Value
Fluctuates (SLOW)
COPY: MEAS̲ 4-20
When the measured value fluctuates and cannot be read, it is possible to stabilize the value. (When is lit)
• When is off (normal): refer to the display update rate
(p. 80) (Default setting)
• When is lit (slow): five times normal (average of 5 times)
OVER 最大入力範囲超え 過負荷検出 RANGE
1
2
3
(
Press
lights up.)
for at least 1 second.
4
(
To cancel the state, press it for at least 1 second again.
goes off.)
MAX REL SLOW
When the measurement function is switched using the rotary switch or SHIFT , the SLOW setting is disabled.
5
6
7
OVER レンジオーバー
HOLD
ΔT
59
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MEM
交流電流 ( クランプ入力 )
クランプ(レンジ設定)
READ
導通ショート
マニュアルレンジ
Removing the Harmonic Components of the Inverter (FILTER)
4.4 Removing the Harmonic
Components of the Inverter
(FILTER)
WARNING
To prevent electric shock, before setting the filter function, confirm if there is a voltage or not with the filter function disabled (OFF).
Remove the harmonic components when measuring the inverter output.
This function can be used when measuring the AC voltage or
AC+DC voltage. The cut-off frequency is 630 Hz.
(
Press for at least 1 second.
lights up .
)
(
To cancel the state, press it for at least 1 second again.
goes off.)
FILTER
Only 600V/1000V range.
抵抗
When the measurement function is switched using the rotary switch or SHIFT , the filter function is canceled.
When measuring voltage with a 400 Hz fundamental frequency (such as that on an aircraft), be aware that the FILTER function may cause attenuation and the indicated voltage may be 20% lower than the actual voltage.
The characteristics of the FILTER function
(low pass filter) are shown in the graph.
0dB
-10dB
-20dB
-30dB
-40dB
10Hz
60
100Hz 1000Hz 10000Hz
オートホールド 0adj 後
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MAX
Checking the Maximum/Minimum Value (MAX/MIN)
4.5 Checking the Maximum/Minimum
Value (MAX/MIN)
The maximum/minimum value after start of the measurement can be checked.
MAX
Press .
Each time the key is pressed, the display is changed in the order of the maximum value
(MAX), minimum value (MIN), and current value.
MIN
A buzzer sounds when the maximum value is updated with MAX displayed or the minimum value is updated with MIN displayed.
1
2
3
4
MIN
The maximum and minimum values are for the displayed value; they do not relate to peak values such as AC signals.
The main and sub displays update their maximum and minimum values individually.
5
6
Clearing the existing maximum/minimum value
When MAX or MIN appears, press .
Both maximum and minimum values are cleared.
After this, the maximum and minimum measurement values after clearing the previous ones are retained.
When saving to memory, only the value displayed on the screen (current value, maximum value, or minimum value) can be saved.
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Checking the Peak Value (V • A PEAK)
4.6 Checking the Peak Value (V • A
PEAK)
After starting the voltage/current peak measurement, the maximum/ minimum instantaneous value can be checked.
The peak measurement can be performed only with the manual range. Press RANGE to select the appropriate range before starting the measurement. (For the range configuration and display range, see page 84)
COPY: MEAS̲ACV COPY: MEAS̲DCV COPY: MEAS̲ DC+ACV
PEAK
Maximum instantaneous value
Minimum instantaneous value
Press .
The maximum/minimum instantaneous value can be retained, from the point at which
is pressed.
To cancel the display of the peak value, press it again.
A buzzer sounds when PEAKmax or PEAKmin is updated.
Clearing the maximum/minimum instantaneous value
Press .
The maximum/minimum instantaneous value can be displayed, from the point at which is pressed.
温度TEMP COPY: MEAS̲DCuA
COPY: MEAS̲DC-ACV
コンダクタンス(S)
交流電流ACA
62
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COPY: MEAS̲ dBm
COPY: MEAS̲ dBm
OVER 最大入力範囲超え
OVER 最大入力範囲超え
SLOW MAX dBV
REL
Checking the Relative Value/Performing Zero Adjustment
4.7 Checking the Relative Value/
Performing Zero Adjustment
The relative value comparing to the standard value can be checked
(relative function).
It can also be used as the zero adjustment function.
Zero adjustment eliminates the influences of the wiring resistance
(resistance measurement) and the wiring capacity (capacitor measurement).
When the following measurement function is selected, this function is disabled.
OVER レンジオーバー
Peak measurement, Continuity, Diode, dBm/dBV, 4-20 mA
The measurement range cannot be changed when [REL] is lit. To change the range, press REL for at least 1 second to reset the
REL function.
Checking the relative value (REL)
OVER
RANGE
When the standard value is measured,
( press
lights up) .
for at least 1 second
To cancel the state, press it for at least 1 second again. ( goes off.)
Example 2: Temperature measurement
When measuring temperature, [REF] lights up and a standard temperature appears in the sub display.
Deviation from the standard temperature
Standard temperature
1
2
3
4
5
6
7
ΔT 63
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1
2
1
2
3
Checking the Relative Value/Performing Zero Adjustment
Performing zero adjustment
5 varies depending on the measurement function.
3
4 6
7
3
4
64
4
4
4
5 Black
Black
V, A, Ω
5
6 Short circuit
2
Red
6
3
, nS
Open
8
Example 1: Resistance
7
1 Select the measurement function.
2 8
3 Allow the test leads to short circuit.
4
9
for at least
1 second.
(After zero adjustment: 0.000 Ω )
5 Measure the resistance.
7
2
Red
1
3
Example 2: Capacitor measurement
1 Select the measurement
8
9 function.
Connect the test leads to the measurement terminals.
3 Allow the test leads to open.
4 Press for at least
1 second.
(After zero adjustment: 0.000 nF)
5 Measure the capacitor.
2
1
2
1
3
2
1
3
3
4
4
4
5
5
6
5
7
6
8
9
6
10
7
7
8
9
10
8
9
10
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Using the Memory Function
4.8 Using the Memory Function
The measurement result can be saved and read using the memory function. Up to 400 data can be saved. Data can also be deleted arbitrarily.
The saved data can be imported to the PC using the DT4900-01
Communication Package (optional).
####
Memory No.
MEM
メモリデータなし
交流電流 ( クランプ入力 )
1
2
TEMP F
1 Press ( lights up) .
Memory mode starts.
This function applies until the power is turned off.
The memory No. appears (only for the
電源遮断
3
4
2 Select the memory No. to be saved using / .
When the key is pressed and held, the memory No. can be incremented/
FILTER
5
6
3 Press to save the
ブザーOFF 7
When the measured value is saved, the memory No. for which the value is to be saved next appears.
Even when the power is turned off, the dBm インピーダンス変更
TEMP C
0−20mA
抵抗
オートパワーセーブOFF
COPY: MEAS̲DCA
65
クランプ(レンジ設定) マニュアルレンジ オートホールド 0adj 後
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Using the Memory Function
• If the memory No. for which the data have already been saved is selected, [ ] appears.
• When MEM is pressed, the data are overwritten.
• When the value is saved with memory No. “400” displayed, a buzzer sounds and “FULL” appears in the display, and then “001” reappears.
] (data reading) is displayed, it is not possible to save the • When [ value.
• The current value, maximum value (MAX), minimum value (MIN), instantaneous maximum value (Peak max), and instantaneous minimum value (Peak min) cannot be saved simultaneously. Only the displayed numeric value can be saved.
• The continuity check data and the diode test data cannot be saved.
When both hands cannot be used during measurement
Enable the auto hold function. After the measured value is retained automatically, press MEM to save the data.
Items to be saved per data
• Function
• Measurement range
• Measured value in the main display
• Measured value in the sub display
• Whether or not the REL function is executed
• Filter ON/OFF
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MEM
交流電流 ( クランプ入力 )
クランプ(レンジ設定)
Using the Memory Function
Reading the memory data (READ)
RESET
####
Memory No.
READ
1 Press
Read mode starts.
( lights up) .
2 Select the desired memory No. using / .
TEMP F
Only the memory Nos. corresponding to saved
抵抗
Canceling the read mode
(
Press READ again or turn the rotary switch.
goes off.)
断線(K熱電対) 電源遮断
導通ショート
メモリデータなし
1
2
3
4
When no memory data exist
The relevant message appears and then the regular measurement display reappears.
メモリデータクリア
5
6
ブザーOFF
7
マニュアルレンジ オートホールド 0adj 後
TEMP C
0−20mA
オートパワーセーブOFF
67
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RESET
MEM
####
交流電流 ( クランプ入力 )
メモリデータなし
クランプ(レンジ設定)
Using the Memory Function
Clearing the memory data (CLEAR)
Memory No.
VERSION
1 Press
Read mode starts.
( lights up) .
2 Select the No. to be cleared using
/ .
TEMP C
READ
3 Press
FILTER
.
抵抗
導通ショート
メモリデータクリア
マニュアルレンジ
電源遮断 0−20mA
1 Turn on the power while pressing
.
dBm インピーダンス変更
2 Press again within 3
All memory data are now cleared.
オートパワーセーブOFF
When 3 seconds elapse without pressing
CLEAR , all memory data are not cleared and the regular display reappears.
0adj 後
68
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Muting the Buzzer
4.9 Muting the Buzzer
The buzzer sound can be disabled.
Note, however, that the buzzer cannot be muted in the following cases.
Continuity check, diode test, and overload warning (only for the maximum value)
Turn on the power while pressing
When
.
is released, the regular display appears ( goes off).
Canceling the buzzer mute function
Turn on the power again while pressing .
When is released, the regular display appears ( lights up).
Even after the power is turned off, the buzzer setting is retained.
4.10 Turning On the Backlight
The backlight can be turned on/off by pressing .
When PC communication is started, the backlight is turned off forcibly.
Enabling/disabling the automatic deactivation of the backlight
Turn on the power while pressing .
Even after the power is turned off, the automatic backlight deactivation setting is retained.
Automatic deactivation
Enable
自動消灯解除 Disable 自動消灯
• When the automatic deactivation setting is enabled (on), the backlight goes off automatically, approximately 40 seconds after the backlight comes on.
• When the automatic deactivation setting is cancelled (oFF) and the auto power save function is disabled, if the instrument has not been operated for 3 minutes, the backlight
自動消灯解除
69
1
2
3
4
5
6
7
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RESET
####
VERSION
断線(K熱電対)
メモリデータなし メモリデータクリア
TEMP F
電源遮断
ブザーOFF
Using the Auto Power Save (APS)
4.11 Using the Auto Power Save (APS)
The auto power save function saves on power consumption. If the instrument has not been operated for approx. 15 minutes, it enters the sleep mode. (When the instrument is in the sleep mode, press any key or turn the rotary switch to recover from the sleep mode.)
When the sleep mode continues for approx. 45 minutes, the power turns off automatically.
Before shipping (as one of the default settings), the auto power save function is set to enabled. ( lights up)
It is also possible to disable the auto power save function.
At 30 seconds before the instrument enters the sleep mode, the
APS blinks to indicate its status. To continuously use the instrument, press any key or turn the rotary switch.
After use, set the rotary switch to OFF. The auto power save function consumes a small amount of current.
Recovering from the power off state
Set the rotary switch to OFF and turn on the power again.
(When the current measurement is used, disconnect the measurement cable and then turn on the power again.)
オートパワーセーブOFF
Turn on the power while pressing
.
When appears.
(APS goes off.)
is released, the regular display
This function is disabled until the power is turned off.
70
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Using Plus/Minus Judgment Function for Measurement Value
4.12 Using Plus/Minus Judgment
Function for Measurement Value
If the measured DC voltage falls below the following standard value, a buzzer sounds and the backlight lights up red.
This function is useful for checking for any incorrect connection of the DC power.
Standard value: -10 V or less
Measurement function: DCV
“Enabling/disabling the Plus/Minus judgment function” (p. 78)
1
2
3
4
5
6
7
71
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Communicating with PC
4.13 Communicating with PC
Using the optional DT4900-01 Communication Package, it is possible to transmit data to the PC or to control the instrument.
For details, see the Instruction Manual which accompanies the communication package.
Install the special software on the PC.
(See the Instruction Manual which accompanies with the communication package.)
Dedicated Software (p. Appx.4)
Attaching the USB cable to the instrument (p. 73)
Connect to the PC.
The virtual COM ports of the PC can be used as the USB interface.
• Communication method: Start-stop system, half-duplex transmission
• Baud rate:
• Stop bit:
19,200 bps fixed
8 bits
1 bit
• Parity:
• Delimiter:
None
CR+LF
Transmits data.
Controls the instrument.
72
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Communicating with PC
Attaching the communication adapter to the instrument
3
4, 5
USB cable
6
Communication adapter
Communication port
1, 2
1 Using a Phillips screwdriver, remove the screws (2 locations) from the battery cover.
2 Remove the battery cover.
3 Attach the communication adapter.
4 Reattach the battery cover.
5 Secure the battery cover with the screws.
6 Connect the
USB cable to the communication adapter.
1
2
3
4
5
6
•
• Connect the cables, being careful to orient each cable correctly.
• During communication,
When disabled.
appears in the display.
is lit, the operation keys of the instrument is
• During communication, do not disconnect the USB cable.
Disconnecting the cable stops the communication. In that case, a warning is displayed by the PC software. Connect the cable again.
• It is possible to use the instrument while the communication adapter is attached, however, the communication adapter is excluded from the drop-proof.
7
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RESET
####
Setting and Checking the System
4.14 Setting and Checking the System
Checking that all indicators are displayed
Check that there is no missing indicator.
If any indicator is missing, stop using the instrument and send it for repair.
Turn on the power while pressing
.
When appears.
is released, the regular display
Checking the software version of the instrument
For repair or calibration, check the version if necessary.
Example: Ver 1.00
Turn on the power while pressing
.
VERSION
When appears.
is released, the regular display
TEMP F TEMP C
74
断線(K熱電対) 電源遮断 0−20mA
メモリデータなし メモリデータクリア ブザーOFF オートパワーセーブOFF
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RESET
####
メモリデータなし
VERSION
断線(K熱電対)
メモリデータクリア
Setting and Checking the System
Changing the temperature display unit
The units of temperature (°C or °F) can be changed.
電源遮断
1
1 Turn on the power while pressing
and simultaneously.
2 Press for at least 3
2
3 Change the unit of the temperature using .
4 Press setting.
to determine the
3
4
5
The setting of the temperature unit is retained even after the power is turned off.
6
7
ブザーOFF オートパワーセーブOFF
75
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Resetting the System
4.15 Resetting the System
The system is returned to the state before shipping. The power-on option setting is also reset.
The memory data are not reset. To clear the memory data, clear the data individually for each memory No. (p. 68) or clear all data
(p. 68). The temperature unit is not reset, either.
RESET
1 Turn on the power while pressing
and .
2 Within 3 seconds, press again.
After [CLr] blinks, the system returns to the state before shipping.
TEMP F
If the instrument is not operated for 3 seconds, the system is not reset but the regular display reappears.
Table of default settings
Setting item
Filter function
Relative function
Default setting
Disabled
Disabled
Display
電源遮断
Display hold
Range
Auto hold
Maximum/Minimum value
Peak value
Auto power save function
Automatic backlight deactivation
Buzzer
Disabled
AUTO
Disabled
Disabled
Disabled
Enabled
Off
Enabled [
[
[
] is lit.
] is lit.
] is lit.
ブザーOFF dBm standard impedance
Temperature display unit
Plus/Minus Judgment Function for Measurement Value
76
°C
Ω
Disabled
TEMP C
0−20mA
オートパワーセーブOFF
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Power-on Option Table
4.16 Power-on Option Table
The settings in the instrument can be changed or checked.
After changing the setting, the regular display then reappears.
+
Turn on the power while pressing the operation key.
(Turn the rotary switch from OFF.)
Setting change
Canceling the auto power save function
(APS)
Buzzer
(ON/OFF)
([
Method
([APS] goes off.)
Ref.
p. 70
] lights up/goes off.) p. 69
Automatic backlight deactivation setting
Automatic deactivation disabled:
[oFF], [bL-A]
Automatic deactivation enabled:
[on], [bL-A] p. 69
1
2
3
4
5
Clearing all memory data
System reset
Press this within
3 seconds.
p. 68
6
Press this within
3 seconds.
p. 76
7
Standard impedance setting (dBm measurement)
Select the desired setting.
Confirm the change.
p. 41
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Power-on Option Table
Setting change
Switching to
4-20 mA/
0-20 mA
Displaying all indicators
Checking the version
Method
Select the desired setting.
Ref.
Confirm the change.
p. 53 p. 74 p. 74
Switching the temperature unit
Select the desired setting.
Confirm the change.
Displaying the serial number
When
3 seconds or more p. 75
Serial No. display (9 digits)
1st to 4th digits: Main display
5th to 9th digits: Sub display
is released, the regular display appears.
Enabling/ disabling the
Plus/Minus judgment function p. 71
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