Fluke 321 Manual de uso y cuidado
®
PN 1631636 October 2001 Rev.1, 12/03
© 2001-2003 Fluke Corporation. All rights reserved. Printed in U.S.A. 1
32X
ClampMeters
Calibration Information
Introduction
WWarning
To avoid electric shock or injury, do not perform the performance tests or
calibration procedures unless you are qualified to do so.
The information provided in this manual is for the use of qualified personnel
only.
The 32X Calibration Information provides the information necessary to verify the performance and adjust
the calibration of the Fluke 321 and 322 ClampMeters, hereafter known as the Meter(s).
The following information is included in this document:
•Safety Information and International Electrical Symbols
•Specifications
•Replacing the Batteries
•Cleaning
•Performance Tests
•Calibration Adjustment
•User-Replaceable Parts and Accessories
•Warranty Statement
See the 321,322 Instruction Card for complete operating instructions.
Contact Information
To contact Fluke, call:
1-888-99-FLUKE (1-888-993-5853) in USA
1-800-36-FLUKE (1-800-363-5853) in Canada
+31 402-675-200 in Europe
+81-3-3434-0181 Japan
+65-738-5655 Singapore
+1-425-446-5500 in other countries
For additional information about Fluke, its products, and services, visit Fluke’s web site at:
www.fluke.com
To register this product, go to register.fluke.com
32x
Calibration Information
2
Safety Information
WWarnings and Precautions
To avoid possible electric shock or personal injury, and to avoid possible damage to the Meter
or the equipment under test, adhere to the following practices:
•Avoid working alone so assistance can be rendered.
•Never use the Meter on a circuit with voltages higher than 600 V or a frequency
higher than 400 Hz fundamental. The meter may be damaged.
•Do not use the Meter or test leads if they look damaged.
•Use extreme caution when working around bare conductors or bus bars. Contact
with the conductor could result in electric shock.
•Read the instruction card and safety sheet before use and follow all safety instructions.
•Use the Meter only as specified in the instruction card; otherwise, the Meter’s safety
features may be impaired.
•Use caution when working with voltages above 60 V dc or 30 V ac. Such voltages
pose a shock hazard.
•Before using the Meter, inspect the case. Do not use the Meter if it is damaged. Look for
cracks or missing plastic. Pay particular attention to the insulation around the connectors.
•Verify the Meter’s operation by measuring a known voltage. Do not use the Meter if it
operates abnormally. Protection may be impaired. When in doubt, have the Meter serviced.
•Do not apply more than the rated current or voltage, as marked on the Meter.
•Use the proper terminals, function, and range for your measurements.
•Do not operate the Meter with the case (or part of the case) removed.
•When servicing the Meter, use only specified replacement parts.
International Electrical Symbols
The following international symbols appear in this document and on the Meter.
Risk of electric shock
Risk of danger. Important Information. See manual.
Equipment protected by double or reinforced Insulation
Battery
Conforms to CSA C22.2 No 1010. 2.032-96
Conforms to EU directives
Earth
DC measurement
AC measurement
N10140 Conforms to relevant Australian standards
Conforms to UL 3111-1 and UL 3111-2-032
Inspected and licensed by TÜV Product Services
ClampMeters
Specifications
3
Specifications
*@ 23 °C ±5 °C, 0 - 90% RH 321 322
Range 0 - 400.0 A 0 - 40.0 A
40 .0 - 400.0 A
Accuracy 50 Hz - 60 Hz 1.8 % ±5 counts
60 Hz - 400 Hz 3.0 % ±5 counts
?
(50/60 Hz)
AC Response Avg
Range 0 - 400.0 V, 400 - 600 VK
Accuracy 50 Hz - 400 Hz 1.2 % ±5 counts
Range 0 - 400.0 V, 400 - 600 VL
Accuracy
_
1 % ±5 counts
Range 0 - 400.0 Ωe
Accuracy 1.0 % ±5 counts
Continuity R≤30 Ω
Jaw Opening 1 inch (26 mm)
IP Rating 40
Storage Temperature -40 °C to 60 °C
Operating Temperature -10 °C to 50 °C
Altitude 2000 m
EMC- EN61326
CAT III 600 V, pollution degree II:
CAT III equipment is designed to protect against transients in equipment in fixed-equipment installations, such as
distribution panels, feeders and short branch circuits, and lighting systems in large buildings.
* < 18 °C, > 28 °C add 0.1 x (specified accuracy)/ °C
32x
Calibration Information
4
Replacing the Batteries
WWarning
To avoid false readings, that could lead to possible electric shock or personal
injury, replace the batteries as soon as the low battery indicator ( b) appears.
Disconnect the test leads before replacing the batteries.
To replace the batteries (refer to Figure 1):
1. Turn the rotary switch to OFF and remove the test leads from the terminals.
2. Loosen the battery compartment door screw, and remove the door from the case bottom.
3. Remove the batteries.
4. Replace the batteries with 2 new AAA batteries.
5. Reattach the battery compartment door to the case bottom and tighten the screw.
AAA
1
2
ade02.eps
Figure 1. Replacing the Batteries
Cleaning
WWarning
To avoid electrical shock, remove any input signals before cleaning.
Caution
To avoid damaging the Meter, do not use aromatic hydrocarbons or chlorinated
solvents for cleaning. These solutions will react with the plastics used in the
instruments.
Clean the instrument case with a damp cloth and mild detergent.
ClampMeters
Performance Tests
5
Performance Tests
WWarning
To avoid electric shock, do not perform the performance test procedures unless
the Meter is fully assembled.
The following performance tests verify the complete operation of the Meter and check the accuracy of
each meter function against the Meter’s specifications. If the Meter fails any part of the test, calibration
adjustment and/or repair is indicated.
In the performance tests, the Meter is referred to as the unit under test (UUT).
Table 1. Required Equipment
Equipment Minimum Specifications Recommended Model
AC Calibrator DC Voltage: 0 to ±1020 V
AC Voltage: 1 mV to 1020 V, 10 Hz to 500 kHz, Sine
AC Current: 29 µA to 20.5 A, 10 Hz to 30 kHz, Sine
Ohms: 0 to 1100 MΩ
Fluke 5520A
50-Turn Current
Coil Uncertainty due to Clampmeter/ Coil Interaction: ± (0.25% of effective
output + 0.5A), for toroidal-wound current clamps, such as the Fluke
80I and 80I-1000.
± (0.50% of effective output + 0.5A), for current clamps like the Fluke
80i-kw, 80i-400, 80i-410, 80i-500, 80i-1010, Fluke 31, Fluke 33, or
equivalent.
Fluke 5500A/Coil
Mirror
Testing the Display
Test the display by turning the Meter on while holding down the HOLD button. Check all segments for
clarity and contrast. Refer to Figure 2.
On/Off
HOLD
V
A
OFF
V
322
CLAMP METER
ade01f.eps
Figure 2. Testing the Display
32x
Calibration Information
6
Hold Button Test
To test the HOLD button, turn the Meter on and push the hold button. Each button push will cause the
Meter to beep.
Preparing for the Performance Test
WWarning
To avoid possible electric shock or personal injury:
•Do not perform the following procedures unless qualified to do so. Some
procedures involve the use of high voltages.
•Before handling the test connections and in between tests, make sure the
calibrator is in standby mode (STBY).
To prepare for the performance test:
1. Make sure that you have the required equipment, see Table 1.
2. Warm up the calibrator as required by its specifications.
3. Allow the temperature of the UUT to stabilize at room temperature ( 23 °C ±5 °C [73 °F ±9 °F] ).
ClampMeters
Performance Tests
7
Performance Test Procedure
To test each of the Meter’s functions and operating ranges, do the following:
1. Connect the source to the Meter’s VΩand COM input jacks.
2. Referring to Table 2 for the 321 and Table 3 for the 322, put the Meter in the desired function and
range for each test.
3. Apply the indicated output from the 5520A Calibrator.
4. When using the amp function on the 5520A, make sure LCOMP on the 5520A is ON.
5. The reading on the Meter display should be within the low and high limits shown in the table.
6. Repeat steps 1-4 for each function and range in Table 2 or Table 3.
If the Meter fails to perform within the low-high range indicated for each test in Table 2 or Table 3, the
Meter needs to be calibrated and adjusted, or requires some repair.
5520A Calibrator
50-Turn Current Coil
Conductor
400A
600V
CAT
CLAMPMETER
OFF
HOLD
A
V
COM V
CAT
600V MAX
322
ade07f.eps
Figure 3. 32x Amps/Hz Verification Setup
32x
Calibration Information
8
Table 2. Performance Tests 321
Functional Test 5520 output Nominal Low Limit High Limit
0.7 A @ 50 Hz 35 A @ 50 Hz 33.8 36.2
0.7 A @ 400 Hz 35 A @ 400 Hz 33.4 36.6
6 A @ 60 Hz 300 A @ 60 Hz 294.1 305.9
7 A @ 50 Hz 350 A @ 50 Hz 343.2 356.8
AC Amps
7 A @ 400 Hz 350 A @ 400 Hz 339.0 361.0
30 Ohm 30 Ohms 29.2 30.8
Beeper must be on
50 Ohm 50 Ohms 49.0 51.0
Beeper must be off
Ohms
350 Ohm 350 Ohms 346.0 354.0
35 V @ 50 Hz 35 V @ 50 Hz 34.0 36.0
350 V @ 60 Hz 350 V @ 60 Hz 345.3 354.7
600 V @ 60 Hz 600 V @ 60 Hz 592.3 607.7
35 V @ 400 Hz 35 V @ 400 Hz 34.0 36.0
350 V @ 400 Hz 350 V @ 400 Hz 345.3 354.7
AC Volts
600 V @ 400 Hz 600 V @ 400 Hz 592.3 607.7
ClampMeters
Performance Tests
9
Table 3. Performance Tests 322
Functional
Test 5520A Output Nominal Low Limit High Limit
0.6 A @ 60 Hz 30 A @ 60 Hz 28.9 31.1
0.07 A @ 50 Hz 3.5 A @ 50 Hz 2.9 4.1
0.7 A @ 50 Hz 35 A @ 50 Hz 33.4 36.6
0.07 A @ 400 Hz 3.5 A @ 400 Hz 2.9 4.1
0.7 A @ 400 Hz 35 A @ 400 Hz 33.4 36.6
1 A @ 50 Hz 50 A @ 50 Hz 48.6 51.4
7 A @ 50 Hz 350 A @ 50 Hz 343.2 356.8
7 A @ 400 Hz 350 A @ 400 Hz 339.0 361.0
AC Amps
1 A @ 400 Hz 50 A @ 400 Hz 48.0 52.0
30 Ohm 30 Ohms 29.2 30.8
Beeper must be on
50 Ohm 50 Ohms 49.0 51.0
Beeper must be off
Ohms
350 Ohm 350 Ohms 346.0 354.0
35 V @ 50 Hz 35 V @ 50 Hz 34.0 36.0
350 V @ 60 Hz 350 V @ 60 Hz 345.3 354.7
600 V @ 60 Hz 600 V @ 60 Hz 592.3 607.7
35 V @ 400 Hz 35 V @ 400 Hz 34.0 36.0
350 V @ 400 Hz 350 V @ 400 Hz 345.3 354.7
AC Volts
600 V @ 400 Hz 600 V @ 400 Hz 592.3 607.7
-350 V -350V -355.8 -344.2
35 V 35V 33.9 36.1
350 V 350V 344.2 355.8
DC Volts
600 V 600V 590.5 609.5
32x
Calibration Information
10
321 Calibration Adjustment
Use the following steps to adjust the calibration of the 321 (refer to Figure 4):
1. Remove the screws on the bottom of the Meter.
2. Lift off the top case.
3. Apply 600.0 V 50 Hz from the 5520A.
4. Adjust VR1 until display reads within 1.0 V.
5. Apply 4 A 50 Hz from the 5520A to the 50-turn coil. The 50-turn coil will make the meter read 200.0
A 50 Hz .
6. Adjust VR2 until the display reads within 0.5 A. A mirror will need to be used because the calibration
point cannot be seen from the top side of the meter.
7. Replace the top case.
8. Replace the case screws.
9. Verify the calibration by going through the performance test procedures.
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2
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