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1 Overview
1
Overview
1.1 Overview and Features
1
This measuring instrument is a multi-function, high-precision digital multimeter which ensures both safety and durability.
Main features
• Filter function effective for the inverter measurement
•
• Speedy display of the RMS measured value
• Environmental performance (can be used anywhere) (Operation temperature: -15 to 55°C)
• High noise-proof performance
Solid body which can be used for an extended period of time (drop-proof)
•
Useful functions during measurement
• Noise reduction (FILTER)
• Display stability (SLOW)
• Display hold (HOLD)
Maximum/Minimum value display
• High accuracy (DCV: 0.025%), wide band (20 Hz to 100 kHz) measurement
• Speedy measurement via a fast response (0 V → 100 V response 1 second*)
* Until the value falls within the accuracy specification range.
9243 graber
If too many data are entered, a hazard is indicated by the red backlight.
Large, easily-viewable display
Backlighting for use in dark environments
Problem finding a suitable installation location?
DM4910 熱電対
The strap with magnet allows the device to be hung conveniently.
DT4911TestLead
タ
2
3
5
L4934 小ワニグチ
114.1V
85.9V
100V 100V
For the DC power supply maintenance
The peak measurement function is used to capture the ripple voltage superimposed on the DC signal.
For control of the UPS battery cell voltage, etc., the measurement value can be saved to the embedded memory (up to 400 data). 7
PEAK max
114.1V
PEAK min 9243 graber
85.9V
100V
DC
The measurement test leads and the end pins can be selected depending on the purpose of use.
100V
AC 成分の波形
L4930 接続ケーブル
L4931 延長ケーブル
Data transmission to PC, control
The optional
DT4900-01
Communication
Package is required.
L4935 ワニ口
15
マグネ付ストラップ
L4936 バスバー
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114.1V
85.9V
100V L4931renketu
L4931 延長ケーブル
L4932(+9207-10cap)
100V
±14.1V
L9207-10
L4933 コンタクトピン
L4935 ワニ口
L4936 バスバー www.
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Parts Names and Functions
1.2 Parts Names and Functions
Front
Some indications are different between the DT4281 and DT4282.
DT4281
Display
(p. 21)
Operation keys (p. 17)
Rotary switch
(p. 18)
Measurement terminals
(p. 19)
DT4282
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Parts Names and Functions
7
8
9
5
6
2
3
1
Operation keys
4 6
5 7
1
2
3
4
10
8
9
(*) Pressing a key for at least 1 second activates the function indicated above the key. To disable the function, change the rotary switch setting.
1
10
2
•
• Displays the maximum or minimum value. (p. 61)
(*) activates the relative value display function. (p. 63)
• Selects the range (manual range). (p. 55)
• (*) changes to the auto range.
(The default is the auto range.)
Changes to the peak measurement. The maximum or minimum instantaneous value is measured. (p. 62)
•
• Deletes the stored data. (p. 68)
Clears the maximum or minimum value. (p. 61)
• Clears the peak value. (p. 62)
•
• Retains the displayed value. (p. 57)
(*) activates the auto hold function.
•
• Reads the stored data. (p. 67)
(*) toggles the filter function between on and off. (p. 60)
• Saves the measurement data. (p. 65)
• (*) toggles the display update speed between normal and slow. ([SLOW] is used to stabilize the display.) (p. 59)
Turns on or off the display backlighting. (p. 69)
Increases/Decreases the memory No. or numeric value.
(When / are displayed on the LCD, these keys can be operated.)
Changes the function of the rotary switch to that indicated shown in blue.
17
3
4
5
6
7
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1
2
3
Parts Names and Functions
7
8
9
10
18
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Parts Names and Functions
Measurement terminals
1
2 3 4
DT4281
1 2 3 4
DT4282
1 DT4282
Current measurement (A) terminal. The red test lead is connected.
When the rotary switch is set to the current measurement, the shutter opens.
2 Current measurement (µA, mA) terminal. The red test lead is connected. When the rotary switch is set to the current measurement, the shutter opens.
3 Commonly used for each measurement. The black test lead is connected.
4 Used for voltage measurement, resistance measurement, continuity check, diode test, temperature measurement, clamp current measurement DT4281 , or conductance DT4282 . Hereafter referred to as “V terminal”.
The red test lead is connected.
When the rotary switch is set to any of the measurements above, the shutter of the current measurement terminal is closed.
Be sure to carefully read the precautions in the following references.
See “Precautions during measurement” (p. 12).
2
3
4
5
6
7
See “Replacing Fuses”
(p. 106).
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Parts Names and Functions
Rear
Serial number label
It is necessary for production control such as product warranty.
Do not peel off the label.
Communication port
When the communication adapter supplied with the optional
DT4900-01 Communication
Package is connected, the data can be transmitted to the PC.
(p. 72)
Test lead holder
The test lead can be held.
Strap hole
The optional Z5004 or Z5020
Magnetic Strap can be attached.
(p. 31)
Stand
The instrument can be set on the stand. (p. 31)
Battery cover
When replacing the batteries
(p. 26) or fuse (p. 106), remove the cover.
See p. 26.
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Display
1.3 Display
For error displays, see “6.3 Error Display” (p. 105).
3 4
Memory No.
1
2
11
10
5
6
7
Main display
1
2
3
4
5
Sub display
9 8
Blinks if the maximum value in each range is exceeded. (Voltage, current, continuity, diode, resistance, temperature, electrostatic capacity, conductance)
Holds measured value. (p. 57)
The auto hold function is activated. (p. 57)
Communicating with the PC. (p. 72)
The memory function is activated. (p. 65)
Memory reading state (p. 67)
Stored data exist. (p. 65)
/ can be operated. (p. 65)
Battery indicator (p. 24)
The auto power save function is activated. (p. 70)
The buzzer can be used. (p. 69)
21
1
2
3
4
5
6
7
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Display
6
7 (Unit)
8
9
Maximum value (p. 61)
Minimum value (p. 61)
Each unit
The display update (sampling) is performed at SLOW speed. (p. 59)
The filter function is activated. (p. 60)
The relative value display function is activated. (p. 63)
Auto range (p. 55)
Manual range (p. 55)
Maximum value in the peak measurement (p. 62)
10
11
Minimum value in the peak measurement (p. 62)
When are displayed, change values.
/ can be used to
Threshold of the continuity check (p. 42)
Threshold of the diode test (p. 43)
AC measurement
DC measurement
AC measurement + DC measurement
During the temperature measurement, the temperature difference from the standard is displayed.
(p. 45)
Continuity check (p. 42)
Diode test (p. 43)
DT4281 Clamp current measurement (p. 51)
% conversion measurement of 4-20 mA (0-20 mA)
(p. 53)
( DT4281 : DT4281 only, DT4282 : DT4282 only)
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COPY: MEAS̲ dBm dBV
OVER 最大入力範囲超え 過負荷検出
COPY: MEAS̲ 4-20
RANGE
Alarm Display and Battery Indicator
1.4 Alarm Display and Battery Indicator
The following conditions are informed via the red backlight, display, and buzzer.
COPY: MEAS̲ dBm dBV
When the maximum input range is exceeded
Voltage/Current measurement blinks, the red backlight blinks, the maximum value within the maximum range blinks, and the buzzer sounds.
Corrective action:
Immediately move the test leads away from the measurement object.
When the measured value exceeds the maximum value in each range (Range over)
Voltage/Current measurement
blinks, the red backlight lights up, and the maximum value blinks.
Corrective action:
Change the range.
SLOW
OVER レンジオーバー
MAX
Measurements other than voltage and current
and the maximum value blinks.
Corrective action:
Change the range, or measure the samples in the specified range.
If the same symptom still occurs, check that the test leads are not broken. (p. 34)
OVER レンジオーバー (2)
23
HOLD
1
COPY: MEAS̲ 4-20
2
3
4
RANGE
5
6
7 REL
OVER レンジオーバー
HOLD
ΔT
SLOW MAX REL ΔT
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RESET
####
RESET
####
Alarm Display and Battery Indicator
When the Thermocouple (K) is broken (Temperature measurement)
TEMP C
断線(K熱電対)
Corrective action:
Check that the thermocouple has been connected correctly to the measurement terminal. If the display does not change, replace with a new Thermocouple
0−20mA
メモリデータなし
Battery indicator
Fully charged.
(Charge: 60% or more)
メモリデータクリア ブザーOFF black charge bars disappear, one by one, from the left of the battery indicator.
The battery voltage is low. Replace the batteries as soon as possible.
(Blinks) The battery is exhausted.
Replace the batteries.
オートパワーセーブOFF
(Charge: 20% or more)
(Charge: 5% or more)
(Charge: less than 5%)
VERSION
断線(K熱電対)
Power shutdown
When the charge is 0% (less than 3.8 V ± 0.2 V),
[bAtt Lo] is displayed for 1 second and the power is shut down.
電源遮断 0−20mA
メモリデータなし メモリデータクリア
24
ブザーOFF オートパワーセーブOFF
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