User's Manual
Datalogging AC/DC Power Clamp-on Meter
Model 382065/382068
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Model 382068 V3.0 4/2005
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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
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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 φ 1.8” (46mm)
Operating temperature 32 to 122
o
F (0 to 50oC)
Operating Humidity R.H. < 80% non-condensing.
Storage temperature 14
o
to 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 64
o
to 82oF (18o to 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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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) 1MΩ 600V
ACV
Range Resolution Accuracy
Input
impedance
Frequency
range
Overload
protection
2 to 600V 0.1V
±
(0.5%+5)
1MΩ
45Hz 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 Ω 3.2V 600Vrms
Resistance ( Ω )
Range Resolution Accuracy
Open circuit
voltage
Overload
protection
10KΩ 1Ω ±(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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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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KW
K
KVA
P P-
3 3W
MEM
PF lead lag
WL123 READ
3 4W Hz
KVA
MINMAX HOLD -
RECORD
HOLD
Hz
1000A
OFF
V
3 4W
3 3W
KW
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
KW
K
KVA
P P-
3 3W
MEM
PF lead lag
WL123 READ
3 4W
Hz
KVA
MINMAX HOLD
-
RECORD
READ
3 4W
PF lead lag
WL123
RECORD
3 3W
MEM
KVA
KW
Hz
KVA
K
MAX
P P- HOLD MIN-
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AC/DC Power Measurements
AC/DC 1φ2W Power (W) and Power Factor (P F) Measur ements
KW
PF lag
HOLD
Hz
1000A
OFF
V
3 4W
3 3W
KW
600V CATMAX
600V MAX CAT
PF lag
KW
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.
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Model 382068 V3.0 4/2005
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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
KW
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.
KW
600V MAX CAT
WL1 2
3 3W
3 3W
PF lag
WL12
KW
MAX600V CAT
WL12
PF lag
3 3W
3 4W
KW
3 3W
V
1000A
Hz
HOLD
OFF
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