Extech Instruments 382065 Manual de usuario

User's Manual

Datalogging AC/DC Power Clamp-on Meter

Model 382065/382068

www.burntec.com

Model 382068 V3.0 4/2005

Table of Contents

Specifications

General Specifications …………………………………………………………. 3

Range Specifications……………………………………………………………. 3

Safety Information ……………………………………………….………………. 5

Meter and Display Descriptions………………………………..……….……… 6

Measurements

AC/DC Power Measurements………………………………………………….. 7

AC/DC Voltage Measurements………………………………………………… 16

AC/DC Current Measurements………………………………………….……… 17

Resistance and Continuity Measurements…………………………….……… 18

Diode Tests …………………….…………….……………………………..…… 19

Min/Max Mode ………………………………….……………………………..…… 19

Peak Detector ………………………………….……………………………..…… 19

Data Hold .………………………………….…………………………………..…… 19

Datalogging …………………………………….……………………………...…... 20

Connecting the Meter to a PC.….….….….….….….….….….….….…..….….. 21

Wiring and Protocol........................................................................................ 24

Maintenance

Battery Replacement ..………………………………….…………………..…… 26

Cleaning ………………………………….……………………………..……….. 26

Repair and Calibration Services ………………………………………….……. 26

Tech Support Hotlines..………………………………….………………………. 26

Introduction

Congratulations on your purchase of the Extech 382065/382068 Datalogging AC/DC

Power Clamp-on Meter. Measurements include DC and AC True Power, Apparent Power,

Power Factor, and True RMS Voltage, Current, & Watts. Status indication for Lead/Lag

and PF is included as well as dual displays of KW + PF, KVA + PF, V + A, A + Hz, and V +

Hz. The frequency of Voltage and Current measurements can be displayed also.

Datalogger and RS-232 PC interface features are built into the meter. The Datalogger/Data

Acquisition Software package is for exclusive use with the Model 382065/382068 Clamp

on Power Datalogger. Windows® 95, 98, NT, 2000, ME and XP operating systems are

supported. Users can download readings stored in the datalogger to a PC, program

sample rates for datalogging, remotely monitor readings, and save readings to ASCII files

for export to spreadsheet and other programs. Careful use will provide years of reliable

service.

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Model 382068 V3.0 4/2005

Specifications

General Specifications

Main display 4-digit (10,000 count) multi-function LCD

Bargraph display 40-segment bargraph

Datalogger 4000 data point continuous logging (25 point manual logging)

with MIN / MAX and Peak detect recording

Peak hold Built-in detector captures positive and negative peaks to .1ms

Maximum voltage 600Vrms between any terminal and earth ground

Meter power 9V battery

Battery life 30 hours (approx.)

Low battery indication Battery icon is displayed

Auto power off After 30 minutes (approx.)

Display update rate 2 times per second (Bargraph); 5 times per second (Digits),

(once every 6 seconds for the KW function)

Jaw opening For Cables φ1.8” (46mm)

Operating temperature 32 to 122oF (0 to 50oC)

Operating Humidity R.H. < 80% non-condensing.

Storage temperature 14oto 140oF (-10 to 60oC)

Storage Humidity RH < 70% non-condensing

Dimensions/Weight 10.24 x 3.66 x 1.77" (260 x 93 x 45mm) / 1 lb. (450g)

Accessories Carrying case, test leads, and 9V battery

Range Specifications

Accuracy specs are ±(reading + no. of digits) at 64oto 82oF (18oto 28o C) and RH to 80%

True power & Apparent power measurements (600KW Max.)

Input Resolution Accuracy

Frequency

range

Overload

protection

V<130V, A<150A

V>130V, A<150A

V<130V, A>150A

0.01

(2%+5)

V>130V, A>150A 0.1

(2%+1)

45Hz to 500Hz 600V/1100A

Power Factor

Range* Resolution Accuracy Frequency Range Sensitivity

0.30 to 1.00 ± (4% + 10d)

0.00 to 0.30

0.001

Not specified

10Hz to 5KHz >100V / 10A

*Minimum voltage: 100V AC, Minimum Current: 20A AC

DCA

Range Resolution Accuracy Overload protection

2 to 1000A 0.1A ±(1.5% + 5) 1100A

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Model 382068 V3.0 4/2005

ACA

Range Resolution Accuracy Frequency range Overload

protection

2 to 1000A 0.1A ±(1.5% + 5) 45Hz to 500Hz 1100A

Crest factor < 3 for stated accuracy

DCV

Range Resolution Accuracy Input impedance Overload

protection

2 to 600V 0.1V ±(0.5% + 5) 1MΩ600V

ACV

Range Resolution Accuracy Input

impedance

Frequency

range

Overload

protection

2 to 600V 0.1V

(0.5%+5)

1MΩ45Hz to 500Hz 600Vrms

Crest factor < 3 for stated accuracy

Peak indication

Range Resolution Accuracy Overload protection

20A~80A 0.1A ±(10% + 10) 1100A

80A~1000A 0.1A ±(6% + 10) 1100A

Peak detect acquisition time .1ms

Peak indication

Range Resolution Accuracy Overload protection

20V~80V 0.1V ±(10% + 10) 600Vrms

80V~600V 0.1V ±(6% + 10) 600Vrms

Peak detect acquisition time .1ms

Audible continuity

Range Continuity

beeper Open circuit voltage Overload

protection

< 50 Ω3.2V 600Vrms

Resistance ( Ω)

Range Resolution Accuracy Open circuit

voltage

Overload

protection

10KΩ1Ω±(1% + 5) 3.2 V 600Vrms

Diode test

Range Resolution Overload protection

0.001V 600Vrms

Frequency (Hz)

Range Resolution Accuracy Voltage

sensitivity

Overload

protection

1KHz 0.1Hz

5KHz 10 Hz

±(0.5% + 5) 10V or 10A 600V / 1100A

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Model 382068 V3.0 4/2005

Safety Information

1. Read the following safety information carefully before attempting to operate or service

the meter.

2. Read all operating instructions before use.

3. To avoid damage to the instrument do not exceed the published input limits.

4. Do not use the meter or test leads if they appear damaged. Use extreme caution when

working around bare conductors or bus bars. Accidental contact with a conductor could

result in electric shock.

5. Use the meter only as specified in this manual otherwise the protection provided by the

meter may be impaired.

6. Use caution when working with voltages above 60VDC or 30VAC RMS. Such voltages

pose a shock hazard.

7. Before taking resistance or continuity measurements, disconnect the circuit from the

main power supply and disconnect all loads from the circuit.

8. Safety Specifications:

•Installation categories III

•Pollution degree 2

•Altitude: 2000m max

•Indoor use only

Safety symbols

Caution: Refer to this manual before using the meter.

Dangerous voltages.

Meter is protected throughout by double insulation or reinforced insulation.

When servicing, use only specified replacement parts.

Complies with EN-61010-1, IEC 1010-2-32

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Model 382068 V3.0 4/2005

KVA

P P-

3 3W

MEM

PF lead lag

WL12 3 READ

3 4W Hz

KVA

MINMAXHOLD -

RECORD

HOLD

1000A OFF

3 4W

3 3W

600V CATMAX

Meter Description

1. Transformer jaws

2. Jaw trigger

3. Data Hold button

4. Function selector

5. Peak Detector READ button

6. MIN/MAX/PEAK function button

7. DC A/W ZERO button

8. RECORD button

9. LCD display

10. RS-232 PC Interface Jack

11. COM terminal

12. VΩHz terminal

13. Low battery indication

14. Analog Display

15. Bargraph Display

16. Units Symbols

Figure 1

Figure 2

KVA

P P-

3 3W

MEM

PF lead lag

WL123 READ

3 4W Hz

KVA

MINMAXHOLD -

RECORD

READ

3 4W

PF lead lag

WL123

RECORD

3 3W

MEM

KVA

MAX

P P-

HOLD MIN-

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Model 382068 V3.0 4/2005

AC/DC Power Measurements

AC/DC 1φ2W Power (W) and Power Factor (PF) Measurements

PF lag

HOLD

1000A OFF

3 4W

3 3W

600V CATMAX

600V MAX CAT

PF lag

Figure 3

1. With the clamp jaws empty, turn the clamp meter on by setting the rotary switch to the KW

position (refer to figure 3).

2. Insert the test leads into the input terminals (black lead to COM and red lead to '+').

3. Connect the probe end of the black test lead to the neutral line.

4. Connect the probe end of the red lead to the power line.

5. Clamp the meter onto the conductor where the red test lead is connected.

6. The power clamp will automatically select the appropriate range.

7. Read the Watt (middle of display) and PF (top display) values on the LCD.

8. Press the READ button to scroll through the dual displays of KW + PF, A + V, and KVA + PF.

WARNING

Do not clamp on to a conductor when zeroing the jaw's

residual magnetic field until the LCD reads zero.

www.burntec.com

Model 382068 V3.0 4/2005

Note: When calculating KVAR, the KVAR accuracy greatly depends on V, A and KW

measurement accuracy (especially when PF is very close to 1). To get a more accurate

value when PF is greater than 0.91 (φ< 25°), use the following equation for a pure sine wave

KVA

PF =KVA (Apparent Power): KVA = 1000

*AV

KVAR (Reactive Power): KVAR= 22 (KW)(KVA) −

3φ3W AC/DC Power Measurement

Figure 4

Note: The "+" sign printed on the jaw must face the power source.

600V MAX CAT

WL12

3 3W

PF lag

WL12

MAX600V CAT

WL1 2

PF lag

3 3W

3 4W

3 3W

1000A

HOLD

OFF

www.burntec.com

Model 382068 V3.0 4/2005

With the Clamp jaws empty, turn the meter on

setting the rotary switch to the 3φ3W

position. WL12 will appear on the upper left side of the LCD prompting the user to take a

WRS (L2 L1) measurement.

1. Insert the test leads into the input terminals (black to COM terminal and red to '+').

2. Select one phase (eg. S or L2) as COM and connect the probe end of the black lead to

that phase (eg. S or L2).

3. Connect the probe end of the red test lead to the second phase (eg. R or L1).

4. Clamp the meter onto the same phase as the red test lead (eg. R or L1).

5. The meter will automatically select the proper range.

6. Wait until the reading is stable (about 6 seconds), and then press the READ button.

WL23 will appear prompting the user to take a measurement of

(WL3 L2).

B. Measure W

TS (L3 L2)

(refer to figure 5).

1. Disconnect the red test lead from the phase where the clamp is connected.

2. Connect the red test lead to the third phase (eg. T or L3).

3. Clamp onto the third phase (where the red test lead is connected; eg. T or L3).

4. The meter will automatically select the proper range.

5. Wait until the reading is stable (about 6 seconds) and then press the READ button.

C. The power clamp will process these measurements

and display the result.

WL123

appears in the upper left corner of the LCD and the 3

3W power

measurement is displayed in watts (this value is now stored in meter memory).

The following equations are provided for your information.

3W = WRS(L1L2) + WTS(L3L2)

WWW KVAR

KKVA 33

φφφ

WKVA

PF 33

Notes:

1. Once a phase is designated as common (COM) it should remain as such in all

subsequent measurements. For example, if the S (or L2) phase is selected, S

(or L2) phase is connected to COM during the measurements of WRS (or

WL1L2) and WTS (or WL3L2) in 3φ3W unbalanced power.

2. The "+" sign printed on the jaw must face the power source.

3. In 3φ3W unbalanced power measurements, if either WRS or WTS is negative

(connection error) ensure that all test lead and clamp connections are correct.

www.burntec.com

Model 382068 V3.0 4/2005

600V

PF lag

3 3W

WL123

MAX CAT

HOLD

Figure 5

Figure 6

600V CATMAX

WL 23

PF lag

3 3W

MAX CAT600V

WL 23

PF lag

3 3W

3 4W

3 3W

1000A

Hz OFF

HOLD

WL 23

3 3W

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