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DM-4
User Manual
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Amprobe DM-4 User Manual

DM-4 Power Quality Recorder
DM-4 Power Quality Recorder
TABLE OF CONTENTS
1.1 GENERAL................................................................................................................... 3
1.2 PRELIMINARY INSTRUCTIONS ............................................................................... 3
1.3 DURING USE.............................................................................................................. 4
1.4 AFTER USE................................................................................................................ 4
2.1 INTRODUCTION ........................................................................................................ 5
2.2 FUNCTIONS............................................................................................................... 5
3. PREPARING THE INSTRUMENT................................................................................................ 6
3.1 INITIAL CHECK.......................................................................................................... 6
3.2 INSTRUMENT POWER SUPPLY............................................................................... 6
3.3 CALIBRATION............................................................................................................ 6
3.4 STORAGE.................................................................................................................. 7
4.1 INSTRUMENT: DESCRIPTION................................................................................. 7
4.2 KEYBOARD: DESCRIPTION.................................................................................... 7
4.3 USING THE DM-4 WITH THE REMOTE USER INTERFACE (PDA)........................ 8
4.4 DISPLAY DESCRIPTION OF THE REMOTE USER INTERFACE (PDA................... 9
4.4.1 VIEW REAL TIME DATA........................................................................................ 9
4.4.2 SETUP ANEW RECORDING SESSION................................................................13
5. MAIN MENU................................................................................................................................15
6. RECORDING CONFIGURATION.............................................................................................
7. STARTING A RECORDING
4.4.3 SET DATE AND TIME FOR AUTOMATIC RECORDING SESSION.....................14
5.1 INITIAL SETTINGS....................................................................................................15
5.1.1 HOW TO SET THE DATE AND TIME?...................................................................16
5.2 DEFAULT SETTINGS: ANALYZER CONFIG.............................................................16
5.2.1 HOW TO SET THE TYPE OF ELECTRICAL SYSTEM UNDER TEST.................17
5.3 BASIC SETTING: RECORDER CONFIG..................................................................18
5.3.1 MDL PARAMETER SETUP.....................................................................................18
5.3.2 MDL VOLTAGE ANOMALIES.................................................................................18
5.4 ADVANCED SETTING: RECORDER CONFIGURATION..........................................19
5.4.1 SETTING THE PARAMETERS INDIVIDUALLY......................................................20
5.4.2 ADVANCED MDL PARAMETER SETUP.................................................................20
5.4.3 SET UP THE PARAMETERS FOR VOLTAGE........................................................20
5.4.4 SETUP THE PARAMETERS FOR CURRENT........................................................21
5.4.5 SETUP THE PARAMETERS FOR POWER............................................................21
5.4.6 SETUP THE PARAMETERS FOR VOLTAGE HARMONICS..................................22
5.4.7 SETUP THE PARAMETERS FOR CURRENT HARMONICS.................................23
5.5 DOWNLOAD DATA....................................................................................................24
5.5.1 DOWNLOAD DATA WITH THE REMOTE USER INTERFACE (PDA)...................24
5.5.2 VIEW DOWNLOADED DATA..................................................................................25
5.5.3 RECORDING INFORMATION................................................................................25
5.5.4 DELETE SESSION.................................................................................................26
5.5.5 RESET....................................................................................................................29
........................................................................................................30
.
.
30
DM-4 Power Quality Recorder
8. RECORDING IN PROCESS........................................................................................................32
9. STOPPING A RECORDING........................................................................................................33
10. CONNECTING THE INSTRUMENT TO A PC...........................................................................34
11. MEASURING PROCEDURES..................................................................................................35
12. MAINTENANCE........................................................................................................................40
13. TECHNICAL SPECIFICATIONS..............................................................................................41
14. APPENDIX 1 – RECORDABLE PARAMETERS: SYMBOLS.................................................46
15. APPENDIX 2 – THEORETICAL OUTLINES............................................................................47
16. AFTER-SALE SERVICE..........................................................................................................56
9.1 STOP A RECORDING WITH THE REMOTE USER INTERFACE (PDA).................33
9.2 STOPA RECORDING WITH THE DOWNLOAD SUITE............................................33
11.1 USING THE INSTRUMENT IN A SINGLE PHASE SYSTEM..................................35
11.2 USING THE INSTRUMENT IN A THREE PHASE
4- WIRE SYSTEM (WYE)........................................................................................36
11.3 USING THE INSTRUMENT IN A THREE PHASE 3- WIRE
SYSTEM (DELTA).......................................................................................................38
12.1 GENERAL................................................................................................................40
12.2 BATTERY REPLACEMENT.....................................................................................40
13.1 FEATURES............................................................................................................. 41
13.1.1 VOLTAGE MEASUREMENT................................................................................41
13.1.2 VOLTAGE ANOMALIES DETECTION (MANUAL SELECTION OF
RANGE) VOLTAGE.................................................................................................41
13.1.3 CURRENT MEASUREMENT (USING EXTERNALTRANSDUCER)................. ..41
13.1.4 POWER MEASUREMENT (COS
13.1.5 COSΘ MEASUREMENT.....................................................................................42
13.1.6 MEASUREMENT OF HARMONICS....................................................................43
13.1.7 TEMPERATURE DRIFT....................................................................................... 43
13.1.8 SAFETY............................................................................................................... 43
13.1.9 GENERAL CHARACTERISTICS......................................................................... 44
13.2 ENVIRONMENT...................................................................................................... 44
13.2.1 OPERATING CONDITIONS................................................................................ 44
13.3 ACCESSORIES...................................................................................................... 45
13.3.1 STANDARD ACCESSORIES...............................................................................45
15.1 VOLTAGE ANOMALIES (VOLTAGE SAG AND SURGE; SPIKE).......................... .47
15.2 VOLTAGE AND CURRENT HARMONICS..............................................................48
15.2.1 THEORY............................................................................................................. . 48
15.2.2 LIMIT VALUES FOR HARMONICS.....................................................................49
15.2.3 PRESENCE OF HARMONICS: CAUSES........................................................... 50
15.2.4 PRESENCE OF HARMONICS: CONSEQUENCES............................................50
15.3 POWER AND POWER FACTOR: DEFINITIONS...................................................51
15.3.1 CONVENTIONS ON POWERS AND POWER FACTORS..................................53
15.3.2 3 PHASE 3 WIRE SYSTEM..............................................................................54
15.4 MEASURING METHOD: OUTLINES......................................................................55
15.4.1 INTEGRATION PERIODS................................................................................... .55
15.4.2 POWER FACTOR CALCULATIONS.................................................................. ..55
ARRANTY............................................................................................................56
16.1 W
16.2 SERVICE................................................................................................................56
Θ: 0.5C – 0.5I).................................................42
DM-4 Power Quality Recorder
1. PRECAUTIONS AND SAFETY MEASURES
1.1 GENERAL
For your own safety and to avoid damaging the instrument we suggest you follow the procedures hereby prescribed and to carefully read all the notes preceded by
the symbol m.
Before and during measurements please be very diligent in following instructions below:
• Do not measure voltage or current in wet or dusty places
• Do not measure in presence of gas, explosive materials or combustibles
• Do not touch the circuit under test if no measurement is being taken
• Do not touch exposed metal parts, unused terminals, circuits and so on
• Do not use the instrument if it seems to be malfunctioning
• Use only cables and accessories approved by Amprobe
The following symbols are used in this manual:
m Caution: keep to what is prescribed by the manual. An incorrect use could
damage the instrument or its components
c High voltage: risk of electric shock
1.2 PRELIMINARY INSTRUCTIONS
• This instrument has been designed for use in places with pollution class 2.
• It can be used for voltage category III 600 V~ phase to phase / 346 V~ phase to earth and of excess
voltage category II 1000 V~ phase to phase / 577 V~ phase to earth.
voltage and current measurements in installations of excess
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DM-4 Power Quality Recorder
• Please keep to the usual safety standards aimed at:
Protecting against dangerous currents; Protecting the instrument against incorrect operations.
• Only the accessories supplied with the instrument guarantee compliance with the
safety standards. Accordingly, they must be in good condition and, if necessary, they must be replaced with identical models.
• Do not take measurements on circuits exceeding the specified current and
voltage limits.
• Before connecting voltage leads and clamps to the circuit under test, make sure
that the circuit configuration has been selected.
1.3 DURING USE
Please read carefully:
CAUTION
Should you fail to keep to the prescribed instructions you could damage
m
the instrument and/or its components or endanger your safety.
• When the instrument is connected to the circuit under test, do not touch any
unused terminal.
• When measuring current, other currents located near the leads may affect the
measuring accuracy.
• When measuring current, always position the wire in the very middle of the jaws
in order to obtain the highest accuracy.
1.4 AFTER USE
• After use, turn off the instrument by pressing the ON/OFF push button.
• If you won’t be using the instrument for long periods of time, use the storage
instructions described in paragraph 3.4.
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DM-4 Power Quality Recorder
2.GENERAL DESCRIPTION
2.1 INTRODUCTION
The DM-4 also referred to as the Modular Data Logger (MDL), addresses the needs of the most demanding Power Quality professionals. The device incorporates full set of measuring features crucial for complete Power Quality analysis. An innovative Remote User Interface (PDA) allows safe, easy and convenient operation of the device remotely. Remote User Interface (PDA) is also used for data viewing, analy­sis and transfer. Independently, the DM-4 can be used directly with a PC using Download Suite software. Since the DM-4 does not have any control buttons on its enclosure, it is protected against setup changes by unauthorized persons while the device is recording, eliminating the need for password protection.
2.2 FUNCTIONS
The DM-4 is able to:
• Display in real time the electrical parameters of a single phase, two phase or three-phase system (wye or delta) and the harmonic analysis of voltages and currents.
• Conduct a direct Energy measurement.
• Record simultaneously (pressing the RECORD key after a proper connection &
device configuration): RMS values of voltages, currents, corresponding harmonics;
active, reactive and apparent powers, power factor and cos
Θ; active, reactive and
apparent energies; voltage sag and surge with 14ms resolution; and voltage spike
with 100ns resolution.
It will be possible to analyze the recorded data by down-
loading the file using the Remote User Interface (PDA) or Download Suite.
• Record Data (pressing RECORD key) the sampled values of the Parameters
present at the instrument’s input.
It will be possible to analyze the recorded data by downloading the file with the Remote User Interface (PDA) device or a PC using the Download Suite.
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DM-4 Power Quality Recorder
3. PREPARING THE INSTRUMENT
3.1 INITIAL CHECK
This instrument has been checked before shipment from an electrical and mechan­ical point of view. All possible precautions have been taken in order to deliver it in perfect condition. Notwithstanding, on receipt of the instrument we suggest that you check it summarily to make sure that no damage has occurred in transit. Should you find irregularities, please contact the carrier immediately. Furthermore, make sure that the parcel contains all the accessories and parts listed on Table
13.3.1. In case of discrepancies, please contact your dealer. Should it be neces­sary to return the instrument to the supplier, please keep to the instructions given at paragraph 16.1.
3.2 INSTRUMENT POWER SUPPLY
The instrument can be powered by:
• 8 batteries 1.5V AA located in the compartment on the back of the instrument
• An external power supply code DM-4EXTPS supplied with the instrument (standard accessory).
CAUTION
m
3.3 CALIBRATION
The instrument complies with the standards mentioned in this manual. Its perform­ance is guaranteed for one year from the purchase date.
For recordings ALWAYS use the external power supply (even though the instrument allows the operator to perform a recording using internal batteries).
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DM-4 Power Quality Recorder
3.4 STORAGE
For long time storage, please remove batteries to prevent leakage into the unit. Store unit in a safe location with room temperature conditions. To guarantee accurate measurements after a long storage period in severe environmental conditions, wait until the instrument resumes its normal conditions (see environmental conditions listed in paragraph 13.2).
4. HOW TO OPERATE
4.1 INSTRUMENT: DESCRIPTION
4
5
6
7
3
8
2
LEGEND
1. Voltage Inputs
2. Current Inputs
3. Infrared Ports
4. External Power Supply Plug
5. RS232 Serial Connector
6. ON/OFF Push Button
7. Record Push Button
8. Reset Push Button
1
4.2 KEYBOARD: DESCRIPTION
The following keys are available:
ON/OFF: turning on – turning off / (Green LED for AC and Red LED for Battery) RECORD: to start/stop manually a recording
RESET: to reset the unit
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DM-4 Power Quality Recorder
4.3 USING THE DM-4 WITH THE REMOTE USER INTERFACE (PDA)
• Connect the Remote User Interface (PDA) to the DM-4 using the provided cable
• Turn ON the DM-4 by pressing on the ON/OFF push button
• Turn ON the Remote User Interface (PDA) by pressing the power button
• Click on the MDL (Modular Data Logger) icon
Click MDL
icon to enter the program.
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DM-4 Power Quality Recorder
4.4 DISPLAY DESCRIPTION OF THE REMOTE USER INTERFACE (PDA)
Download the recorded files.
View the downloaded files.
MDL-Main Menu
View Real Time Data Setup a New Recording Session Download Data View Downloaded Data
Display real time information of the monitored system.
Allow the user to setup recording sessions with the
desired configuration. Delete recording or downloaded files.
Delete Session Device Status
Display the status of the
device.
4.4.1 View Real Time Data
When monitoring an electrical system in real time, the user needs to know the type of system configuration the device is hooked up to in order to have the correct readings. Refer to section 11 for more information on the different types of electrical system configurations.
• From the MDL Main Menu screen, click on View Real Time Data. The following screen will appear.
MDL-Main Menu
View Real Time Data Setup a New Recording Session
R
TM Setup
Phase Selection: P 3 Ø 4 W (Y) Fund. Frequency: Clamp Type:
P 60 Hz P 1000 Amps
OK
• Select the desired electrical system configuration you want to monitor.
• Select the fundamental frequency of the system
• Select the type of clamp you are using with the DM-4 to monitor the electrical system.
• Click OK to accept the system setup.
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DM-4 Power Quality Recorder
• 1-Phase 2-wire, 60Hz System using 1000A clamp
MDL-Main Menu
View Real Time Data Setup a New Recording Session
R
TM Setup
Phase Selection: P 1 Ø 2 W (Y) Fund. Frequency: Clamp Type:
P 60 Hz P 1000 Amps
OK
• Select 1Ø2W, 60Hz, 1000A and then click OK. The following screen will appear:
Voltage & Current
V1: 116.13V __ l1: 3.96A
Back Voltage Current Power
• Once you get into this screen, you can get real time readings for voltage and current and their associated waveforms and harmonics. You can also get readings for power.
How to Monitor Voltage Only?
Click on the Voltage button located at the bottom of the screen. The voltage reading for the monitoring phase will be displayed with its respective frequency.
Real Time Voltage
V1
Volt (V) 0.00
Freq (Hz) 0.00
Back Harm Scope
10
DM-4 Power Quality Recorder
In order to display the voltage waveform or harmonics for the monitored phase, click on Scope or Harm buttons. The waveform or the harmonics table for the monitored voltage phase will be displayed.
oltage 1
Real Time Mode
P V
Real Time Voltage
V1
Harm 1 0.00 Harm 3 0.00 Harm 5 0.00
Harm 7 0.00
Close
Back
How to Monitor Current Only?
From the Voltage and Current screen, click on the Current button. You will be prompted to the current only real time display. The RMS value for the monitored phase will be reported with its respective frequency.
Voltage & Current
V1: 116.13V __ l1: 3.96A
Click
Current
Back Voltage Current Power
In order to display the current waveform or the harmonics
Real Time (Current)
Ø1
Cur (A) 0.00
Freq (Hz) 0.00
Back Harm Scope
for the monitored
phase, click on Scope or Harm buttons. The waveform graph or the harmonics table for the monitored Current phase will be displayed.
Real Time Mode
P Current 1
Real Time Harmonics
Ø1
1 0.00 3 0.00
0.00
5
7 0.00
Close
Back
11
DM-4 Power Quality Recorder
How to Monitor Power Only?
From the Voltage and Current screen menu, click on the Power button located at the bottom of the screen.The Real Time Power screen will appear as shown below with the following information: Real Power: P (kW); Reactive Power: Q (kVAR); Apparent Power: S (kVA); True Power Factor: pF; and the displacement power factor: dPf. To return to the previous screen, click on the Back button.
Real Time (Power)
Ø1 Ø2 Ø3 Total
P(kW) 0.00 0.00 0.00 0.00 Q(kVAR) 0.00 0.00 0.00 0.00
Click Back
S(kVA) 0.00 0.00 0.00 0.00 PF 0.00 0.00 0.00 0.00 dPF 0.00 0.00 0.00 0.00
Back
3- Phase 4-wire, 60Hz System Using 1000A Clamp
• Once you have the DM-4 connected with your electrical system, you can follow the same steps from paragraph 4.3 to paragraph 4.4.1.
• Select 3Ø4W, 60Hz, 1000A and then click OK.
Voltage & Current
V1: 0.000V _ _ l1: 0.00A V2: 0.000V _ _ l2: 0.00A V3: 0.000V __
Back Voltage Current Power
l3: 0.00A ln: 0.00A
_
Click OK
to accept
the System
Setup
MDL-Main Menu
View Real Time Data Setup a New Recording Session
R
TM Setup
Phase Selection: P 3 Ø 4 W (Y) Fund. Frequency: Clamp Type:
P 60 Hz P 1000 Amps
OK
• The Voltage and Current screen should display the readings for all three phases as shown above.
• You can access the readings for voltage, current and power with their respective
waveforms and harmonics tables as described on “How to monitor voltage only?”,
“How to monitor current only?”, and “How to monitor power only?” in paragraph
4.4.1 for the 1Ø2W system.
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DM-4 Power Quality Recorder
3-Phase 3-wire, 60HZ system with 1000A Clamp
Because the 3Ø3W system doesn’t have a neutral wire, you need to follow the proper direction given in this manual to connect the DM-4 with the 3Ø3W electrical system you want to monitor. Refer to paragraph 11.3
• Follow the same procedures as for 1Ø2W and 3Ø4W systems. The following screen should appear when accepting the system configuration setup for 3Ø3W.
Voltage & Current
V1: 0.000V _ _ l1: 0.00A V2: 0.000V _ _ l2: 0.00A V3: 0.000V __ l3: 0.00A _
Back Voltage Current Power
ln: 0.00A
Click OK to accept
the System
Setup
MDL-Main Menu
View Real Time Data Setup a New Recording Session
R
TM Setup
Phase Selection: P 3 Ø 4 W (Y) Fund. Frequency: Clamp Type:
P 60 Hz P 1000 Amps
OK
4.4.2 Setup A New Recording Session
MDL-Main Menu
View Real Time Data Setup a New Recording Session Download Data View Downloaded Data
Delete Session Device Status
From the main menu, click on “Setup A New Recording Session”. The MDL system Setup menu will be displayed.
MDL System Setup
Phase Selection: P 3 Ø 4 W (Y) Fund. Frequency: Clamp Type: START:
P 60 Hz P 1000 Amps
P Manual
ST
Back
OP:
P Manual
Next
13
DM-4 Power Quality Recorder
The MDL System setup allows you to configure the data logger device for the type of power system you want to perform the recording.
• Phase Selection: 1Ø2W; 1Ø3W; 3Ø3W (Delta configuration); 3Ø4W (Wye configuration).
• Fund. Frequency: 50-Hz; 60-Hz
• Clamp Type: 100 Amps; 1000 Amps; 3000 Amps
• Integration Period: 5s, 15s, 30s, 1min, 5min, 15min, 30min, 1 hr
• Start: Manual or Automatic
- Manual: Recording session starts when you click on the “Record Now”
button in later screen
- Automatic: Recording session will start at the preset time.
• Stop: Manual or Automatic
- Manual: Recording session stops when you click on “stop recording”
- Automatic: Recording session stops at the preset time.
4.4.3 Set Date and Time For Automatic Recording Session
To set the date and time for an Automatic Recording session, follow the steps below as shown on the screens on the previous page:
• Click on the drop down box of “START” and select “Set Time”
• Click on the drop down box of “Set Time” and select “Choose date”
• Select a date between the actual date of the year and 2031. (
NOTE: You cannot
choose a date in the past, for example 2001 is not a valid date).
• Repeat Step.2 to choose the time and click OK after a selection is made.
• Once you click on the RECORD button, the preset recording is stored in memory. You can disconnect the Remote User Interface (PDA) at this point.
MDL System Setup
Phase Selection: P 3 Ø 4 W (Y) Fund. Frequency:
T
Clamp Integration Period:
:
T
AR
ST
OP:
ST
Back
P 60 Hz
ype:
P 1000 P 5 sec
ime
T
P Set
ue 3/15/05 3:08 pm
P T
ime
T
P Set
ue 3/15/05 3:08 pm
P T
Amps
Next
MDL System Setup
Phase Selection: P 3 Ø 4 W (Y) Fund. Frequency:
T
Clamp Integration Period: START:
STOP:
Back
P 60 Hz
ype:
P Set Time
Now
P Tue 3/15/05 3:08 pm
Choose Date
Choose Date
P Set Time
Choose Time
P Tue 3/15/05 3:08m
P 1000 P 5 sec
Amps
14
Next
Recording Start Date
Q 2005 R
Jan Feb Mar Apr May Jun
Jul Aug Sep Oct Nov Dec
S M T W T F S
1 2 3 4 5
6 7 8 9 10 11 12 13 14 20 21 22 23 24 25 26 27 28 29 30 31
Cancel
(15)
Today
16 17 18 19
DM-4 Power Quality Recorder
MDL System Setup
Phase Selection: P 3 Ø 4 W (Y) Fund. Frequency:
Type:
Clamp Integration Period: START:
STOP:
Back
P 60 Hz
Amps
P 1000 P 5 sec
P Set Time
Now
P Tue 3/15/05 3:08 pm
Choose Date
P Set Time
Choose Time
Choose Time
P Tue 3/15/05 3:08m
Next
MDL System Setup
Phase Selection: P 3 Ø 4 W (Y) Fund. Frequency: Clamp Type: Integration Period: START:
R
ecording Start Time
3 : 0 8 AM PM
OK
P Set Time
H P
Cancel
P 60 Hz P 1000 Amps P 5 sec
5. MAIN MENU
MDL-Main Menu
View Real Time Data Setup a New Recording Session Download Data View Downloaded Data
Delete Session Device Status
5.1 INITIAL SETTINGS
Initial settings are the last settings the user configured the unit at the time of the last use. Each time you access the device with the Remote User Interface (PDA) , you will be asked if you would like to retrieve the device existing settings. Click YES to retrieve the existing settings and NO to reset the device with the Remote User Interface (PDA) settings.
MDL-Main Menu
View Real Time Data Setup a New Recording Session
R
etrieve Settings?
Do you want to retreive current settings from the device?
No
Yes
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DM-4 Power Quality Recorder
5.1.1 How to Set the Date and Time?
When connecting to the data logger, if the date and time of the device are different from the Remote User Interface (PDA), the program will ask you if you would like to synchronize the data logger with the Remote User Interface (PDA). Click on YES to set the date and time manually or automatically. Click on NO to continue to use the device. Important!!! (If you do not set the device time correctly, the auto-
matic recording will not take place.)
Connecting
If you are using serial port, make sure that the device is connecting using appropriate cable.
Wrong Settings
The data logger’s date and
v
time are not in sync with the Palm. Do you want to change the settings
No
Yes
Click Yes
to change
the settings
Set Time
Synchronize time with Palm’s clock
Y
Palm Time: 10/3/05 2:27pm
Set time manually
Set Date: 10/3/05 Set Time: 2:27pm
Click Done
to accept
the change
Done
Device Status
Record @ undefined
Device time 10/3/05 2:29 pm Battery 100% Memory 0% F/W ver 1.0b3
Back
Set
NOTE. You can also use the Download Suite program to set the date and time in the device.
5.2 DEFAULT SETTINGS: ANALYZER CONFIG
The basic setting allows you to quickly set the device for a recording session with all the 456 parameters selected.
16
DM-4 Power Quality Recorder
5.2.1 How to Set the Type of Electrical System Under Test
• Phase Selection
This parameter permits you to select the type of electrical system under test among the following configurations:
1Ø2W: Single phase system 1Ø3W: Single phase system 3Ø3W: 3 wires system (three-phase system without neutral) 3Ø4W: 4 wires system (three-phase system with neutral)
MDL System Setup
Phase Selection: P 3 Ø 4 W (Y) Fund. Frequency: Clamp Type: Integration Period:
Comment: Recording 1 START: P Manual STOP:
Back
P Manual
1Ø2W 1Ø3W
P 60 Hz
3Ø3W (Delta)
3Ø4W (Y)
Next
• Clamp Type The value of this parameter must always be equal to the clamp type you are using. Three types of clamps are available:
1000A: For Standard clamps of 1000 Amps 3000A: For Flexible clamps of 3000 Amps. 100A: For miniature clamps of 100 Amps.
Set the desired value by selecting the clamp type using the drop-down box.
MDL System Setup
Phase Selection: P 3 Ø 4 W (Y) Fund. Frequency:
Clamp Type:
Integration Period:
START: STOP:
Back
Comment:
P Manual P Manual
17
P 60 Hz
100
1000 AMPS
3000 AMPS
AMPS
Next
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