Fluke 28 II Ex Use and care manual

May 2012 Rev. 1, 10/17
© 2012-2017 Fluke Corporation. All rights reserved. Specifications are subject to change without notice.
All product names are trademarks of their respective companies. 1
28 II Ex
Digital Multimeter
Calibration Information
Introduction
XWWarning
To prevent possible electrical shock, fire, or personal injury:
•Read all safety information before you use the Product.
•Do not do the performance tests or calibration adjustment
procedures unless qualified to do so.
•Read the entire Users Manual and the Safety Instructions
before you use the Product.
•Carefully read all instructions.
The 28 II Ex Calibration Information contains adjustment and performance test
procedures for the Fluke Model 28 II Ex Digital Multimeter (the Product or Meter).
This document includes:
•Safety Information (page 2)
•International Electrical Symbols (page 4)
•Specifications (page 5)
•General Maintenance (page 9)
•Fuse Test (page 9)
•Performance Tests (page 12)
•Calibration Adjustment Procedure (page 16)
•Limited Warranty (page 20)
See the 28 II Ex Users Manual for instructions on Product operation.
How to Contact Fluke
To contact Fluke, call one of the following telephone numbers:
•Technical Support USA: 1-800-99-FLUKE (1-800-993-5853)
•Calibration/Repair USA: 1-888-99-FLUKE (1-888-993-5853)
•Canada: 1-800-36-FLUKE (1-800-363-5853)
•Europe: [phone]
•Japan: [phone]
•China: 86-400-921-0835
•Singapore: [phone]
•Anywhere in the world: [phone]
Or, visit Fluke's website at www.fluke.com.
To register your product, visit http://register.fluke.com.
To view, print, or download the latest manual supplement, visit
http://us.fluke.com/usen/support/manuals.

28 II Ex
Calibration Information
2
Safety Information
A Warning identifies conditions and procedures that are dangerous to the user. A
Caution identifies conditions and procedures that can cause damage to the Product or
the equipment under test.
XWWarning
To prevent possible electrical shock, fire, or personal injury:
•Use the Product only as specified, or the protection
supplied by the Product can be compromised.
•The battery door must be closed and locked before you
operate the Product.
•Replace the batteries when the low battery indicator ()
shows to prevent incorrect measurements.
•Remove all probes, test leads, and accessories before the
battery door is opened.
•Do not use test leads if they are damaged. Examine the test
leads for damaged insulation, exposed metal, or if the wear
indicator shows. Check test lead continuity.
•Do not apply more than the rated voltage, between the
terminals or between each terminal and earth ground.
•Limit operation to the specified measurement category,
voltage, or amperage ratings.
•Do not operate the Product with covers removed or the
case open. Hazardous voltage exposure is possible.
•Do not touch voltages >30 V ac rms, 42 V ac peak, or
60 V dc.
•Use the correct terminals, function, and range for
measurements.
•Do not work alone.
•Measure a known voltage first to make sure that the
Product operates correctly.
•Use only cables with correct voltage ratings.
•Use only current probes, test leads, and adapters supplied
with the Product.
•Do not exceed the Measurement Category (CAT) rating of
the lowest rated individual component of a Product, probe,
or accessory.
•Connect the common test lead before the live test lead and
remove the live test lead before the common test lead.
•Examine the case before you use the Product. Look for
cracks or missing plastic. Carefully look at the insulation
around the terminals.

Digital Multimeter
Safety Information
3
•Do not use and disable the Product if it is damaged.
•Do not use the Product if it operates incorrectly.
•Do not use the Product in damp or wet environments.
•Keep fingers behind the finger guards on the probes.
•Measure for hazardous voltage without the Low-Pass Filter.
WCaution
To prevent possible damage to the Meter or to the equipment
under test, follow these guidelines:
•Disconnect circuit power and discharge all high-voltage
capacitors before you do resistance, continuity, diodes, or
capacitance tests.
•Use the correct terminals, function, and range for all
measurements.
•Before you measure current, check the fuses of the Meter.
(See Fuse Test.)

28 II Ex
Calibration Information
4
Electrical Symbols
Table 1 is a list of electrical symbols that appear in this document and on the Meter.
Table 1. Symbols
WWARNING - RISK OF DANGER. Consult user documentation.
XWARNING. HAZARDOUS VOLTAGE. Risk of electric shock.
TDouble Insulated
AC (Alternating Current)
DC (Direct Current)
Earth
Fuse
Battery. Low battery when displayed.
RContinuity test or continuity beeper tone.
Capacitance
ODiode
PConforms to European Union directives.
Conforms to relevant South Korean EMC Standards.
(Conforms to the European Explosive Atmospheres (ATEX) directive.
)Certified by CSA Group to North American safety standards.
Certified by TÜV SÜD Product Service.
Conforms to relevant Australian Safety and EMC standards.
Measurement Category II is applicable to test and measuring circuits connected directly to utilization
points (socket outlets and similar points) of the low-voltage MAINS installation.
Measurement Category III is applicable to test and measuring circuits connected to the distribution part of
the building’s low-voltage MAINS installation.
Measurement Category IV is applicable to test and measuring circuits connected at the source of the
building’s low-voltage MAINS installation.
~
This product complies with the WEEE Directive marking requirements. The affixed label indicates that
you must not discard this electrical/electronic product in domestic household waste. Product Category:
With reference to the equipment types in the WEEE Directive Annex I, this product is classed as
category 9 "Monitoring and Control Instrumentation" product. Do not dispose of this product as unsorted
municipal waste.

Digital Multimeter
General Specifications
5
General Specifications
Maximum voltage between any
terminal and earth ground ........................................... 1000 V rms
WFuse for mA inputs.................................................. 0.44 A, 1000 V IR 10 kA
WFuse for A inputs..................................................... 11 A, 1000 V IR 17 kA
Display........................................................................... 6000 counts, updates 4/sec (19,999 counts in high-resolution
mode).
Altitude
Operating.................................................................... 2000 meters
Storage ....................................................................... 10 000 meters
Operating Temperature ................................................ Different temperature ranges for Tamb are fixed by type-approved
batteries (see separate Safety Instructions for a list of approved
batteries)
Temperature coefficient ............................................... 0.05 X (specified accuracy) / °C (<18 °C or >28 °C)
Electromagnetic Compatibility (EN 61326-1:2005) .... In an RF field of 3 V/M, accuracy = specified accuracy +20
counts, except 600 μA dc range total accuracy = specified
accuracy +60 counts. Temperature not specified
Relative Humidity.......................................................... 0 % to 80 % (0 °C to 35 °C)
0 % to 70 % (35 °C to 50 °C)
Battery Type.................................................................. 3 AAA Alkaline batteries, NEDA 24A IEC LR03 (see separate
Safety Instructions for a list of approved batteries)
Battery Life .................................................................... 400 hrs typical without backlight (Alkaline)
Vibration ........................................................................ Per MIL-PRF-28800 for a Class 2 instrument
Shock............................................................................. 1 Meter drop per IEC 61010 (3 Meter drop with holster)
Size (H x W x L)............................................................. 4.57 cm x 10.0 cm x 21.33 cm (1.80 in x 3.95 in x 8.40 in)
Size with Holster........................................................... 6.35 cm x 10.0 cm x 19.81 cm (2.50 in x 3.95 in x 7.80 in)
Weight............................................................................ 567.8 g (1.25 lb)
Weight with Holster and Flex-Stand............................ 769.8 g (1.70 lb)
Safety
General....................................................................... IEC 61010-1: Pollution Degree 2
Measurement.............................................................. IEC 61010-2-033: CAT IV 600V / CAT III 1000V
Ingress Protection....................................................... IEC 60529: IP67, non-operating
Electromagnetic Compatibility (EMC)......................... In an RF field of 3 V/M, accuracy = specified accuracy
+20 counts, except 600 μA dc range total accuracy = specified
accuracy +60 counts. Temperature not specified.
International................................................................ IEC 61326-1: Portable Electromagnetic Environment
IEC 61326-2-2 CISPR 11: Group 1, Class A
Group 1: Equipment has intentionally generated and/or uses
conductively-coupled radio frequency energy that is necessary
for the internal function of the equipment itself.
Class A: Equipment is suitable for use in all establishments
other than domestic and those directly connected to a low-
voltage power supply network that supplies buildings used for
domestic purposes. There may be potential difficulties in
ensuring electromagnetic compatibility in other environments
due to conducted and radiated disturbances.
Caution: This equipment is not intended for use in residential
environments and may not provide adequate protection to radio
reception in such environments.
Korea (KCC) ............................................................... Class A Equipment (Industrial Broadcasting & Communication
Equipment)
Class A: Equipment meets requirements for industrial
electromagnetic wave equipment and the seller or user should
take notice of it. This equipment is intended for use in business
environments and not to be used in homes.
USA (FCC).................................................................. 47 CFR 15 subpart B. This product is considered an exempt
device per clause 15.103.

28 II Ex
Calibration Information
6
Detailed Specifications
For all detailed specifications:
Accuracy is specified for 2 years after calibration, at operating temperatures of 18 °C to 28 °C, with relative humidity at
0 % to 80 %. Accuracy specifications take the form of ±([% of Reading] + [Number of least-significant digits]). In the 4
½-digit mode, multiply the number of least-significant digits (counts) by 10.
AC Voltage
AC conversions are ac-coupled and valid from 3 % to 100 % of range.
Range Resolution Accuracy
45 – 65 Hz 30 – 200 Hz 200 – 440 Hz 440 Hz – 1 kHz 1 – 5 kHz 5 – 20 kHz
600.0 mV 0.1 mV ±(0.7 % + 4)
±(1.0 % + 4)
±(2 % + 4) ±(2 % + 20) [1]
6.000 V 0.001 V
60.00 V 0.01 V
±(0.7 % + 2)
±(2 % + 4) [2] Unspecified
600.0 V 0.1 V Unspecified
1000 V 1 V Unspecified Unspecified
Low-Pass Filter ±(1.0 % + 4) [1] +1.0 % + 4
-6.0 % - 4 [3] Unspecified Unspecified Unspecified
[1] Below 10 % of range, add 12 counts.
[2] Frequency range: 1 kHz to 2.5 kHz
[3] Specification increases from -1 % to -6 % at 440 Hz when filter is used.
DC Voltage, Conductance, and Resistance
Function Range Resolution Accuracy
mV dc 600.0 mV 0.1 mV ±(0.1 % + 1)
V dc
6.000 V 0.001 V
±(0.05 % + 1)
60.00 V 0.01 V
600.0 V 0.1 V
1000 V 1 V
Ω
600.0 Ω0.1 Ω±(0.2 % + 2) [2]
6.000 kΩ0.001 kΩ±(0.2 % + 1)
60.00 kΩ0.01 kΩ
600.0 kΩ0.1 kΩ±(0.6 % + 1)
6.000 MΩ0.001 MΩ
50.00 MΩ0.01 MΩ±(1.0 % + 3) [1,3]
nS 60.00 nS 0.01 nS ±(1.0 % + 10) [1,2,3]
[1] Add 0.5 % of reading when measuring above 30 MΩin the 50 MΩrange, and 20 counts below 33 nS in the 60 nS range.
[2] When using the rel function to compensate for offsets.
[3] >40 °C temperature coefficient is 0.1 x (specified accuracy)/°C.
Temperature
Range Resolution
Accuracy [1,2]
-200 °C to +1090 °C
-328 °F to +1994 °F
0.1 °C
0.1 °F
±(1.0 % + 10)
±(1.0 % + 18)
[1] Does not include error of the thermocouple probe.
[2] Accuracy specification assumes ambient temperature stable to ±1 °C. For ambient temperature changes of ±5 °C, rated accuracy
applies after 2 hours.

Digital Multimeter
Detailed Specifications
7
AC Current
Function Range Resolution Burden Voltage Accuracy
(45 Hz – 2 kHz) [1]
μA ac 600.0 μA 0.1 μA 100 μV/μA
±(1.0 % + 2)
6000 μA 1 μA 100 μV/μA
mA ac 60.00 mA 0.01 mA 1.8 mV/mA
400.0 mA [2] 0.1 mA 1.8 mV/mA
A ac 6.000 A 0.001 A 0.03 V/A
10.00 A [3,4] 0.01 A 0.03 V/A
[1] AC conversions are ac coupled, true rms responding, and valid from 3 % to 100 % of range, except 400 mA range. (5 % to 100 %
of range) and 10 A range (15 % to 100 % or range).
[2] 400 mA continuous. 600 mA for 18 hr maximum.
[3] W10 A continuous up to 35 °C. <20 minutes on, 5 minutes off at 35 °C to 55 °C. >10 A to 20 A for 30 seconds maximum, 5
minutes off.
[4] >10 A accuracy unspecified.
DC Current
Function Range Resolution Burden Voltage Accuracy
μA dc 600.0 μA 0.1 μA 100 μV/μA ±(0.2 % + 4)
6000 μA 1 μA 100 μV/μA ±(0.2 % + 2)
mA dc 60.00 mA 0.01 mA 1.8 mV/mA ±(0.2 % + 4)
400.0 mA [1] 0.1 mA 1.8 mV/mA ±(0.2 % + 2)
A dc 6.000 A 0.001 A 0.03 V/A ±(0.2 % + 4)
10.00 A [2,3] 0.01 A 0.03 V/A ±(0.2 % + 2)
[1] 400 mA continuous; 600 mA for 18 hr maximum.
[2] W10 A continuous up to 35 °C. <20 minutes on, 5 minutes off at 35 °C to 55 °C. >10 A to 20 A for 30 seconds maximum, 5
minutes off.
[3] >10 A accuracy unspecified.
Capacitance
Range Resolution Accuracy
10.00 nF 0.01 nF ±(1.0 % + 2) [1]
100.0 nF 0.1 nF
1.000 μF 0.001 μF
±(1.0 % + 2)
10.00 μF 0.01 μF
100.0 μF 0.1 μF
9999 μF 1 μF
[1] With a film capacitor or better, using the rel mode to zero residual.
Diode
Range Resolution Accuracy
2.000 V 0.001 V ±(2.0 % + 1)
Frequency
Range Resolution Accuracy
199.99 Hz 0.01 Hz
±(0.005 % + 1) [1]
1999.9 Hz 0.1 Hz
19.999 kHz 0.001 kHz
199.99 kHz 0.01 kHz
>200 kHz 0.1 kHz Unspecified
[1] From 0.5 Hz to 200 kHz and for pulse widths >2 μs.

28 II Ex
Calibration Information
8
Frequency Counter Sensitivity and Trigger Levels
Input Range Minimum Sensitivity (RMS Sine Wave) Approximate Trigger Level
(DC Voltage Function)
5 Hz – 20 kHz 0.5 Hz – 200 kHz
600 mV dc 70 mV (to 400 Hz) 70 mV (to 400 Hz) 40 mV
600 mV ac 150 mV 150 mV -
6 V 0.3 V 0.7 V 1.7 V
60 V 3 V 7 V (≤140 kHz) 4 V
600 V 30 V 70 V (≤14.0 kHz) 40 V
1000 V 100 V 200 V (≤1.4 kHz) 100 V
Duty Cycle (Vdc and mVdc)
Range Accuracy
0.0 % to 99.9 % [1] Within ±(0.2 % per kHz + 0.1 %) for rise times <1 μs. [2]
[1] 0.5 Hz to 200 kHz, pulse width >2 μs. Pulse width range is determined by the frequency by the frequency of the signal.
[2] For 6 V dc range, accuracy is unspecified.
Input Characteristics
Function Overload
Protection
Input
Impedance
(nominal)
Common Mode
Rejection Ratio
(1 kΩunbalance) Normal Mode Rejection
1000 V rms
10 MΩ<100 pF
>120 dB at dc, 50 Hz
or 60 Hz >60 dB at 50 Hz or 60 Hz
1000 V rms >120 dB at dc, 50 Hz
or 60 Hz >60 dB at 50 Hz or 60 Hz
1000 V rms 10 MΩ<100 pF
(ac-coupled) >60 dB, dc to 60 Hz
Open Circuit
Test Voltage
Full Scale Voltage Typical Short Circuit Current
To 6 MΩ5 MΩor
60 nS 600 Ω6 kΩ60 kΩ600 kΩ6 MΩ50 MΩ
Ω1000 V rms <7.0 V dc <1.7 V dc <1.9 V dc 500 μA 100 μA 10 μA 1 μA 0.4 μA 0.2 μA
1000 V rms <7.0 V dc 2.200 V dc 1.0 mA typical
MIN MAX Recording
Nominal Response Accuracy
100 ms to 80 %
(dc functions) Specified accuracy ±12 counts for changes >200 ms in duration
120 ms to 80 %
(ac functions) Specified accuracy ±40 counts for changes >350 ms and inputs >25 % of range
250 μs (peak) [1]
Specified accuracy ±200 counts for changes >250 μs in duration
(add ±100 counts for readings over 6000 counts)
(add ±100 counts for readings in Low Pass mode)
[1] For 6 V range: 1 ms

Digital Multimeter
Basic Maintenance
9
Basic Maintenance
XWWarning
To prevent possible electrical shock, fire, or personal injury:
•Have the Product repaired by ECOM Instruments GmbH or
an ECOM authorized service center to keep Product
certification.
•Do not operate the Product with covers removed or the case
open. Hazardous voltage exposure is possible.
General Maintenance
XWWarning
To prevent possible electrical shock, fire, or personal injury,
•Remove the input signals before you clean the Product.
•Use only specified replacement parts.
To clean the external surfaces of the Product, wipe the case with a damp cloth and mild
detergent. Do not use abrasives or solvents.
Dirt or moisture in the terminals can cause incorrect measurements and can falsely set
off the Input Alert feature. Clean the terminals as follows:
1. Turn off the Product and remove all test leads.
2. Shake out dirt that can be in the terminals.
3. Soak a clean swab with mild detergent and water. Move the swab around in each
terminal. Dry each terminal with canned air to push the water and detergent out of the
terminals.
It is recommended that the Product be calibrated by Fluke in 2-year intervals.
XWWarning
To prevent possible electrical shock or personal injury, use
only specified replacement fuses with the amperage, voltage,
and speed ratings shown in Table 2.
Fuse Test
As shown in Figure 1, with the Product in the Nfunction, put a test lead into the 
jack and place the probe tip on the other end of the test lead against the metal of the
current input jack. If  appears in the display, the probe tip has been inserted too far
into the amps input jack. Lift the lead out a bit until the message no longer shows in the
display and  or a resistance measurement shows in the display. The resistance value
must be as shown in Figure 1. If the tests give measurements other than those shown,
have the Product serviced.

28 II Ex
Calibration Information
10
Touch top half
of input contacts
Good 11 A fuse: 0.0 Ω to
0.5 Ω
Replace fuse: OL
Good 0.44 A fuse: 0.995 kΩ to
1.005 kΩ
Replace fuse: OL
gaq105.eps
Figure 1. Current Fuse Test
Battery Replacement
Replace the batteries with three AAA batteries (NEDA 24A IEC LR03).
XWWarning
To prevent possible electrical shock, fire, or personal injury:
•Replace the batteries when the low battery indicator ()
shows to prevent incorrect measurements. If the display
shows “” the Product will not function until the
batteries are replaced.
•Use only three AAA 1.5-volt batteries, correctly installed to
power the Product. See item 5.1 in the Safety Information for
a list of approved batteries. All batteries are to be replaced
at the same time with same part number batteries outside
the Ex-hazardous area.
Replace the batteries as follows and refer to Figure 2:
1. Turn the rotary switch to OFF and remove the test leads from the terminals.
2. Remove the six Torx-head screws from the case bottom and remove the battery door
(item ).
Note
When you lift the battery door, make sure the rubber gasket stays attached
to the battery compartment barrier.
3. Remove the three batteries and replace all three with AAA Alkaline batteries
(item ).

Digital Multimeter
Basic Maintenance
11
4. Make sure the battery compartment gasket (item ) is properly installed around the
outside edge of the battery compartment barrier.
5. Align the battery compartment barrier with battery compartment while you replace the
battery door.
6. Attach the door with the six Torx-head screws.
Note
Fluke recommends that you remove the batteries from the Product for long
periods of storage.
1
4
5
2
3
gaq10.eps
Figure 2. Battery and Fuse Replacement

28 II Ex
Calibration Information
12
Fuse Replacement
XW Warning
To prevent possible electrical shock, fire, or personal injury,
use only specified replacement fuses.
Examine or replace the fuses in the Product as follows (See Figure 2):
1. Turn the rotary switch to OFF and remove the test leads from the terminals.
2. Refer to step 2 in the “How to Replace the Batteries” section to remove the battery
door.
3. Carefully lift out the fuse assembly (item ) from the fuse compartment.
4. Pry one end of the 11 A fuse loose, then lift the fuse out of its bracket (item ).
5. Install ONLY specified replacement fuses with the amperage, voltage, and speed
ratings shown in Table 2. The 440 mA fuse is attached to the fuse assembly. You
must use a new fuse assembly to replace the 440 mA fuse.
6. Install the fuse assembly into the fuse compartment.
7. Refer to steps 4 through 6 in the “How to Replace the Batteries” section above to
replace the battery door.
Table 2. Fuse Replacement
Description Qty. Fluke Part or Model Number
WFuse, 11 A, 1000 V, FAST 1 803293
28 II Ex Fuse Assembly 1 4016494
WTo ensure safety, use exact replacement only.
Performance Tests
XWWarning
To prevent possible electrical shock, do not do the performance
test procedures unless the Product is fully assembled.
The performance tests verify the complete operation of the Meter and the accuracy of
each function against its specifications. Do the performance tests bi-annually to make
sure the Meter operates to it specifications. If one or more of the tests shows a
measurement that is not between the high and low limits, do the adjustment procedure.
See the “Calibration Adjustments” section.
Note
In the performance tests, the Meter is referred to as the Unit Under Test
(UUT).

Digital Multimeter
Performance Tests
13
Required Equipment
Table 3 is a list of the equipment necessary to do performance tests on the Meter.
Table 3. Required Equipment
Recommended Equipment Measurement Function Accuracy
Calibrator
(Fluke 5520A or equivalent)
DC Volts 0 V to 1000 V ±0.012 %
DC Current 350 μA to 2 A ±0.05 %
AC Volts 0 V to 1000 V ±0.15 %
@ 60 Hz to 20 kHz ±3 %
AC Current 350 μA to 2 A ±0.39 %
@ 60 Hz to 1 kHz
Resistance 1 Ωto 100 MΩ±0.06 %
Capacitance 9 μF to 900 μF ±0.475 %
Frequency 19.999 kHz to 199.99 kHz,
±0.0137 %
150 mV to 6 Vrms, ±5 %
K-type Thermocouple, mini-plug
on both ends
Temperature
Accuracy Test
To measure the accuracy of the Meter, set the Calibrator to the Calibrator output
parameters shown in Table 4. Make sure the UUT measurement is between the low and
high limit shown in the table.
Table 4. Accuracy Tests
Step Test
Function Range Calibrator Output UUT Measurement
Low Limit High Limit
1 K
AC Volts
600 mV 60 mV, 60 Hz 59.2 mV 60.8 mV
2 600 mV 330 mV, 60 Hz 327.3 mV 332.7 mV
3 600 mV 600 mV, 13 kHz 586.0 mV 614.0 mV
4 6 V 675 mV, 60 Hz 0.666 mV 0.684 mV
5 6 V 3.3 V, 60 Hz 3.273 V 3.327 V
6 6 V 3.3 V, 20 kHz 3.214 V 3.386 V
7 60 V 6.75 V, 60 Hz 6.68 V 6.82 V
8 60 V 33 V, 60 Hz 32.75 V 33.25 V
9 600 V 67.5 V, 60 Hz 66.8 V 68.2 V
10 600 V 330 V, 60 Hz 327.5 V 332.5 V
11 600 V 330 V, 2.5 kHz 323.0 V 337.0 V
12 1000 V 100 V, 60 Hz 97 V 103 V
13 1000 V 1000 V, 1 kHz 986 V 1014 V

28 II Ex
Calibration Information
14
Table 4. Accuracy Tests (cont.)
Step Test
Function Range 5520A Output UUT Measurement
Low Limit High Limit
14 K
AC Volts
Frequency
600 mV 150 mV, 99.95 kHz 99.93 kHz 99.97 kHz
15 600 mV 150 mV, 199.50 kHz 199.48 kHz 199.52 kHz
16 Sensitivity6 V 0.7 V, 99.95 kHz 99.93 kHz 99.97 kHz
17 60 V 7 V, 99.95 kHz 99.93 kHz 99.97 kHz
18 VG
Trigger level
6 V 4.4 V, 1 kHz Sq. Wave 999.8 Hz 1000.2 Hz
19 VG
Duty Cycle
60 V 5 V, 1 kHz, DC offset 2.5 V
Square Wave
49.7 % 50.3 %
20 V
DC Volts
6 V 3.3 V dc 3.297 V 3.303 V
21 60 V 33 V dc 32.97 V 33.03 V
22 600 V 330 V dc 329.7 V 330.3 V
23 1000 V 1000 V dc 998 V 1002 V
24 
DC Volts
600 mV 50 mV dc 49.8 mV 50.2 mV
25 600 mV 330 mV dc 329.6 mV 330.4 mV
26 T
Ohms
600 Ω330 Ω( Use 2 wire Comp) 329.1 Ω330.9 Ω
27 6 kΩ3.3 kΩ(Use 2 wire Comp) 3.292 kΩ3.308 kΩ
28 60 kΩ33 kΩ32.92 kΩ33.08 kΩ
29 600 kΩ330 kΩ327.2 kΩ332.1 kΩ
30 6 MΩ3.3 MΩ3.279 MΩ3.321 MΩ
31 50 MΩ30 MΩ29.67 MΩ30.33 MΩ
32 nS
Conductance 60 nS 100 MΩ9.60 nS 10.40 nS
33 O
Diode6 V 2.0 V dc 1.959 V 2.041 V
34 
AC Amps6 A 3.0 A, 60 Hz 2.968 A 3.032 A
35 
DC Amps6 A 3.0 A 2.990 A 3.010 A
36 
AC Milliamps
60 mA 33 mA, 60 Hz32.65 mA 33.35 mA
37 400 mA 330 mA, 60 Hz326.5 mA 333.5 mA
38 
DC Milliamp
60 mA 33 mA 32.89 mA 33.11 mA
39 400 mA 330 mA 329.1 mA 330.9 mA
40 
AC Microamps
600 μA 330 μA, 60 Hz 326.5 μA 333.5 μA
41 6000 μA 3300 μA, 60 Hz 3265 μA 3335 μA

Digital Multimeter
Calibration Adjustments
15
Table 4. Accuracy Tests (cont.)
Step Test
Function Range 5520A Output UUT Measurement
Low Limit High Limit
42 
DC Microamps
600 μA 330 μA 328.9 μA 331.1 μA
43 6000 μA 3300 μA 3291 μA 3309 μA
44 
Capacitance
10 nFOpen input [1] 0.70 nF1.10 nF
45 100 nF5 nF[2] 4.7 nF5.3 nF
46 100 μF
9.5 μF9.2 μF9.8 μF
47 K
Low Pass
Filter
1000 V 400 V, 400 Hz 372 V 408 V
48 1000 V 400 V, 800 Hz [3] 226 V 340 V
49 VDC Peak
Min/Max 6 V 6 Vpp, 500 Hz Sq.
Wave, DC offset 1 V -1.798 V to -2.202 V 3.797 V to 4.203 V
50 mVdc
Temperature [4]
0 °C -1.0 °C 1.0 °C
51 100 °C 98.0 °C 102.0 °C
[1] Remove test leads from unit.
[2] Use REL to compensate for internal Meter and lead capacitance (must disconnect test leads from calibrator before pushing REL)
[3] The Meter accuracy is not specified at this input signal frequency with Low-pass filter selected. The display reading shown, checks
that the Low-pass filter is active and follows an expected roll-off curve.
[4] To ensure accurate measurement, the Meter and thermocouple adapter must be at the same temperature. After connecting the
thermocouple adapter to the Meter allow for reading to stabilize before recording display reading.
Backlight Functional Test
A backlight test is done to make sure the backlight comes on with the first push of H.
The second push causes the backlight to be brighter and a third push turns off the
backlight.
Calibration Adjustments
If one or more of the accuracy tests shows a measurement that is not between the high
and low limits, you can do adjustments. This adjustment procedure sets the Meter to
operate to its specifications.
Note
If the adjustment routine is stopped before you complete the procedure, no
changes are made to the calibration constants in memory.
You must set the Meter to the CAL mode and type in a password to do calibration
adjustments.
Cal Mode Button Functions
For the CAL mode, some of the buttons on the Meter have alternative functions. Some
buttons function differently at different points in the calibration adjustment procedure.
Table 5 is a list of the Meter buttons and their function for the calibration adjustment
procedure.

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Table 5. Button Functions for Calibration Adjustment
Button CAL Function Password Numeric
Value

(Yellow)
Push and hold to show the measured value in the display. The measurement
is not calibrated, so it can be inaccurate. 1
Use to set the Meter to the CAL mode. In a calibration procedure, push and
hold to show the necessary input level in the Meter display. 2
CPush at the point where you type in the password to make a new password. 3
D
Use as the “ENTER” key. Push to store the new calibration adjustment value
and move to the subsequent step. This button is also used to exit the
calibration adjustment mode after the calibration adjustment sequence is
complete.
4
HUse only as a password value. 5
EUse only as a password value. 6
FUse only as a password value. 7
GPush and hold to show the necessary frequency of the input signal in the
Meter display. 8
Calibration Adjustment Procedure
Note
In the calibration adjustment procedure, some adjustment steps are longer
to do than others (10 seconds to 15 seconds). For some of the steps, the
Meter gives two beeps when the step is complete. Not all steps have this
feature.
1. Push and hold down while you turn the rotary switch from OFF to K. Z
in the display shows you have set the Meter into the CAL mode.
2. Push Donce to see the number of calibrations that have been completed.
3. Push Dagain to show  in the display.
4. Use the eight Meter buttons to type in the current password and push D.
Note
The default factory password is 1234. See the “How to Change the
Password” section to change the password. If the password you typed in is
not correct, then the Meter will beep two times and show  in the
display.

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5.  in the display shows the CAL mode is set and the Meter is at the first calibration
adjustment step.
WCaution
To prevent damage to the Meter, make sure the calibrator is in
standby before you change its parameters, or change the
function on the Meter.
6. Set the calibrator to the parameters shown in the Input Value column of Table 6 for
the calibration step shown in the display.
Note
You can push to show the necessary input signal level and Gto
show the necessary input signal frequency for the calibration step.
8. Turn on the output signal on the calibrator.
9. Push Dto complete the step and move to the subsequent step.
If the step shown in the display moves to the subsequent step, the adjustment was
successful. If the Meter gives two beeps and does not move to the subsequent step,
then the adjustment was not successful. Make sure the calibrator is set correctly and
push Dagain. If the calibrator output is correct, then it is necessary to repair the
Meter.
Note
If the calibration adjustment is not completed correctly, the Meter will not
operate correctly.
10. Put the calibrator in standby.
11. Do steps 6 through 10 for each calibration step in Table 6.
12. After you complete the last adjustment step,  shows in the display. Push Dto
complete the calibration adjustment procedure and store the calibration constants in
the Meter.

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Table 6. Calibration Adjustment Steps
Function
(Switch Position) Adjustment Step Input Value
K
(AC Volts)
C-01 600.0 mV, 60 Hz
C-02 600.0 mV, 20 kHz
C-03 6.000 V, 60 Hz
C-04 6.000 V, 20 kHz
C-05 60.00 V, 60 Hz
C-06 60.00 V, 20 kHz
C-07 600.0 V, 60 Hz
C-08 600.0 V, 10 kHz
V
(DC Volts)
C-09 6.000 V
C-10 60.00 V
C-11 600.0 V
M
(DC Millivolts)
C-12 600.0 mV
C-13 60.00 mV
T
(Ohms)
C-14 600.0 Ω
C-15 6.000 kΩ
C-16 60.00 kΩ
C-17 600.0 kΩ
C-18 6.000 MΩ
C-19 0.000 Ω
C-20 50.0 MΩ
O(Diode Test) C-21 3.000 V
P
(Amps)
C-22 6.000 A, 60 Hz
C-23 6.000 A dc
P
(Amps)
C-24 60.00 mA, 60 Hz
C-25 400.0 mA, 60 Hz
C-26 60.00 mA dc
C-27 400.0 mA dc
Q
(Microamps)
C-28 600.0 μA, 60 Hz
C-29 6000 μA, 60 Hz
C-30 600.0 μA dc
C-31 6000 μA dc

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Each Fluke product is warranted to be free from defects in material and workmanship under normal use and
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ООО «Флюк СИАЙЭС»
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корпус 9, подъезд 4, 1 этаж
11/99

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