User’s Guide
1000A / 2000A DC/AC Clamp DMM
Models 380922 / 38092F&C / 380923 / 38093F&C /
38095F&C
• 1000A models (380922, 38092C, 38092F, 38095C and 38095F)
• 2000A models (380923, 38093C, and 38093F)
• True RMS models (38095C and,
38095F)
• Models with temperature (38092C,
38092F, 38093C, 38093F 38095C and
38095F)
• Designed to meet IEC 1010 safety
standards
. INTRODUCTION
Congratulations on your purchase of Extech’s Clamp DMM. This professional meter, with
proper care, will provide years of safe reliable service.
2. SPECIFICATIONS
Display
Measurement
Data hold
Peak Hold
Diode Check
Polarity
Current Sensor
Overload indication
Sampling Time
Max. Conductor size
Operating Temp.
Operating Humidity
Power Supply
Power Consumption
IEC 1010
Size / Weight
Accessories, supplied
Accessories, optional
13 mm(0.5") LCD display, 3-1/2 digits, + 1999 count
ACA, DCA, ACV, DCV, Ω, Diode, Temp (C& F models only)
Available for all functions
Acquisition Time - 150ms; Display Decay Rate <2 digits/sec.
Short, Open, Good/Defective test
Automatic switching. "-" indicates reverse polarity.
Hall effect sensor
"1" or "-1"
Approximately 0.4 second
1.3" (32mm) 1000A models, 2" (50mm) 2000A models
32 °F to 122 °F ( 0 °C to 50 °C)
Max. 80% RH.
006P DC 9V battery (Heavy duty type).
Approximately 11mA DC (approx. 100 hrs.)
CAT III 600V
9.1 x 2.8 x 1.4” (230 x 70 x 36mm) / 0.85 lbs (380g) inc. battery
Instruction manual, Test leads (red & black), Carrying case,
Bead wire temperature probe with temperature models
NIST certificate, AC line separator, Temperature probes
Function
Range
Res.
DC Voltage
200V
600V
200 mV
200V
600V
2000 Ω
200A
1000A
2000A
0.1V
1V
0.1mV
0.1V
1V
1Ω
0.1A
1A
1A
380922/23 only
AC Voltage
Resistance
AC/DC Current
380922/2CF/5CF
380923/3CF
Notes:
Accuracy
+(0.8% reading. + 1 digit)
Overload
Protection
DC /AC 600V
+(1% reading + 2 digits)
DC/AC 400V
AC/DC 600V
+(1% reading + 1 digit)
AC/DC 250V
+(1.5% FS+ 10 digits)
AC/DC 1000A
+(2% FS+ 5 digits)
±(2% FS+ 5 digits)<
AC/DC 2000A
1,500A
DCV/ACV input impedance is 10 MΩ
ACA/ACV frequency response is 40 to 400Hz
ACA/ACV specifications apply at 50/60Hz
ACA/ACV True RMS response for models 38095F/C
Temperature measurement specifications
Range
Resolution.
Accuracy
Models 38092C, 38095C and 38093C
o
o
0 to 750 C
± (1%+2 C)
o
o
o
C
1
750 to 900 C
typical ± (2%+1 C)
o
o
900 to 1000 C
typical ± (3%+1 C),
o
o
0 to -20 C
typical ±2 C
o
o
typical ±3 C
-20 to -40 C
Models 38092F, 38095F and 38093F
o
o
32 to 1400 F
± (1.2%+2 F)
o
o
o
F
1
1400 to 1800 F
typical ± (2%+2 F)
o
o
1800 to 2000 F
typical ± (4%+4 F)
o
o
32 to -4 F
typical ±4 F
o
o
typical ± 6 F
-4 to -40 F
Note: The measurement range of the type k naked-bead probe supplied is:
o
o
o
o
-40 C to 250 C (-40 F to 482 F)
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380923 V2.3 1.01
3. FRONT PANEL DESCRIPTION
1.
Current sense Jaws
2.
Measurement trigger
3.
Power and Peak Hold Switch
4.
DCA zero adjust
5.
LCD Display
6.
Input terminals
7.
Temperature probe input socket (only on
Temperature models)
8.
Function select switch
9.
AC/DC, Ohms, temperature, diode test select
switch
10. Data Hold switch
Note that the battery compartment is on the
rear of the unit.
4. SAFETY SYMBOLS
This symbol, adjacent to another symbol or terminal, indicates the user must
refer to the manual for further information.
This symbol, adjacent to a terminal, indicates that, under normal use,
hazardous voltages may be present
Double insulation
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5. OPERATION
5.1 Preparation for Measurement
1. Check that the 9V battery is properly connected.
2. Slide the "POWER" switch to the "ON" position
3. Make sure the "Data Hold" button is in the "OFF" (out) position.
4. Note: Always remove test leads from the source before changing functions.
5.
6.
7.
Slide the "FUNCTION SWITCH" to the correct position for the desired measurement.
Do not exceed the maximum rated voltage of each range and input terminal.
Switch the power "OFF" when the instrument is not in use. Remover the battery if the
instrument will not be used for a long period of time.
5.2 DCV / ACV Measurement
1. Insert the Black test lead into the "COM." terminal.
2. Insert the Red test lead into the "V/Ω" terminal .
3. If measuring DCV, make sure the "AC/DC, Ω, Diode" button is in the ‘out’ position. If
measuring ACV, make sure the "AC/DC, Ω, Diode" button is pressed in.
4. Slide the "Function Switch" to the appropriate position for the highest anticipated
voltage (200mV, 200V or 600V for DCV; 200V or 600V for ACV).
5. Select power "ON".
5.3 Resistance Measurement
1. Insert the Black test lead into the "COM." terminal.
2. Insert the Red test lead into the "V/ Ω " terminal.
3. Make sure the "AC/DC, Ω, Diode" button is in the ‘out’ position.
4. Slide the "Function Switch" to the 2000Ω position.
5. Select power "ON".
6. Connect the test leads across the device to be measured.
5.4 Diode Test
1. Insert the Black test lead into the "COM." terminal.
2. Insert the Red test lead into the "V/Ω " terminal.
3. Make sure the "AC/DC, Ω, Diode" button is in the out position.
4. Slide the "Function Switch" to the 2000Ω position.
5. Select power "ON".
6. Connect the test leads as indicated below.
7. When the leads are connected with the polarity shown in Fig. 3, a forward current
flow is established and a good diode will produce a reading on the display. If the
diode is defective, "000" (short circuit) or "1" (open circuit) will be displayed. When
the leads are connected with the polarity shown in Fig. 4, a reverse check on the
diode is done. A good diode will show "1" on the display. If the diode is defective,
"000" will be displayed. A diode test should include both forward and reverse current
flow check.
red
black
black
red
Fig. 4
Fig. 3
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5.5 AC Current Measurement
1. Make sure the "AC/DC, Ω, TEMP, Diode"
button is pressed in.
2. Slide the "Function Switch" to the
appropriate position for the highest
anticipated current (200A or 1000A/ 2000A)
3. Press the "Trigger" to open the "Jaws" and
place the clamp around the conductor of
the power line. The conductor should be
centered in the clamp.
4. Select power "ON".
Keep clamp
tightly closed
Single conductor
centered in clamp
5.6 DC Current Measurement.
1. Make sure the "AC/DC, Ω, Diode" button is
pressed in the out position.
2. Select power "ON".
3. Slide the "Function Switch to the appropriate position for the highest anticipated
current (200A or 1000A/2000A).
4. Turn the "DCA Zero Adjust" until the display shows "0".
5. Note: If the "DCA Zero Adjust" knob cannot correct to a "0" reading, the jaws
may be magnetized. To correct the problem, reverse the position of the clamp
or reverse the DC current flow. Also, opening and closing the jaws several
times may eliminate the condition.
6.
Press the "Trigger" to open the "Jaws" and place the clamp around the conductor of
the power line. The conductor should be centered in the clamp.
5.7 Peak Current Measurement.
1.
2.
3.
4.
5.
6.
7.
8.
9.
Select power "OFF". Turn off the device being tested.
Press the "Trigger" to open the "Jaws" and place the clamp around the conductor of
the power line. The conductor should be centered in the clamp.
Press or depress the "AC/DC, Ω, Diode" button depending on whether AC or DC
current is being measured.
Slide the "Function Switch" to the appropriate position for the highest anticipated
current (200A or 1000A/2000A)
Select power "ON".
If measuring DCA, turn the "DCA Zero Adjust" until the display shows "0".
Select "PEAK HOLD".
Turn on the device being tested. The peak value of the starting current will appear
on the display.
Select power "ON" or "OFF" after the peak value is measured.
5.8 Data Hold
When making any measurements, pressing the Data Hold key will freeze the data on the
display. Press the Data hold key again to release this function.
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5.9 Temperature Measurement (Models 38092F/C, 38093F/C or 38095F/C only)
1.
2.
3.
4.
5.
6.
Make sure the "AC/DC, Ω, TEMP, Diode" button is in the out position.
Slide the "Function Switch" to the "TEMP" position.
Insert the Thermocouple Probe into to "TYPE K" socket observing the proper
polarity.
NOTE: The meter is supplied with a thermocouple suitable for most
o
o
applications. Maximum operating temperature for this probe is 250 C/480 F.
Other type K probes are available for high temperature measurements and
special applications.
When first inserted, allow the thermocouple connector several minutes to stabilize
to the same temperature as the meter. This will improve accuracy.
Select power "ON" and read the LCD measurement.
6. BATTERY REPLACEMENT
6.1 The low battery indication appears as "LOBAT" on the left corner of the display. When
"LOBAT" appears, replace the battery as soon as possible. Reliable readings can be
obtained for several hours after the first appearance of the low battery indication.
6.2 To replace the battery:
a) Remove the screw holding the battery cover and slide the cover out.
b) Replace with 9V battery (heavy duty type) and reinstall the cover.
c) Make sure the battery cover is secured after changing the battery.
Caution: Disconnect test leads from meter before opening battery compartment.
7. CALIBRATION AND REPAIR SERVICES
Extech offers complete repair and calibration services for all of the products we sell. For
periodic calibration, NIST certification or repair of any Extech product, call customer
service for details on services available. Extech recommends that calibration be performed
on an annual basis to insure calibration integrity.
8. WARRANTY
EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and
workmanship for one year from date of shipment (a six month limited warranty applies on sensors and
cables). If it should become necessary to return the instrument for service during or beyond the warranty
period, contact the Customer Service Department at (781) 890-7440 ext. 210 for authorization. A Return
Authorization (RA) number must be issued before any product is returned to Extech. The sender is
responsible for shipping charges, freight, insurance and proper packaging to prevent damage in transit.
This warranty does not apply to defects resulting from action of the user such as misuse, improper wiring,
operation outside of specification, improper maintenance or repair, or unauthorized modification. Extech
specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not
be liable for any direct, indirect, incidental or consequential damages. Extech's total liability is limited to
repair or replacement of the product. The warranty set forth above is inclusive and no other warranty,
whether written or oral, is expressed or implied.
Copyright © 2001 Extech Instruments Corporation. All rights reserved
including the right of reproduction in whole or in part in any form.
Tech Support Hotlines
781-890-7440 ext. 200
extech@extech.com
www.extech.com
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