Fluke 28 II Ex Use and care manual

May 2012
© 2012 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.
•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 Lifetime 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]
•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.

Digital Multimeter
Safety Information
3
•Examine the case before you use the Product. Look for
cracks or missing plastic. Carefully look at the insulation
around the terminals.
•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
AC (Alternating Current) JEarth ground
DC (Direct Current) IFuse
XHazardous voltage PConforms to European Union directives.
WRisk of Danger. Important
information. See Manual. Diode
Battery. Low battery when
displayed. TDouble insulated
RContinuity test or continuity
beeper tone. Capacitance
CAT III
IEC Overvoltage Category III
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.
CAT IV
IEC Overvoltage Category IV
CAT IV equipment is designed to protect
against transients from the primary supply
level, such as an electricity meter or an
overhead or underground utility service.
(Conforms to ATEX directive. Conforms to relevant Australian standards.
®Inspected and licensed by TÜV
Product Services. ÆConforms to CAN/CSA-C22.2 No. 61010-1
2nd, + Amendment 1.
~Do not dispose of this product as unsorted municipal waste. Go to Fluke’s website for
recycling information.

Digital Multimeter
General Specifications
5
General Specifications
Maximum voltage between any
terminal and earth ground ........................................... 1000 V rms
WFuse for mA inputs .................................................. 440 mA, 1000 V FAST Fuse
WFuse for A inputs ..................................................... 11 A, 1000 V FAST Fuse
Display ........................................................................... 6000 counts, updates 4/sec (19,999 counts in high-resolution
mode).
Altitude
Operating.................................................................... 2,000 meters
Storage ....................................................................... 10,000 meters
Temperature
Operating.................................................................... -15 °C to 50 °C
Storage ....................................................................... -40 °C to +85 °C (without battery)
-40 °C to +60 °C (with battery)
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
Approved Batteries....................................................... Duracell Procell MN2400 LR03
Duracell Plus MN2400 LR03
Varta Max Tech No. 4703
Varta Industrial Alcaline No. 4003 (min. operating temperature is -
10 °C)
Eveready Energizer No. E92
Rayovac Alkaline AAA (U.S. Type)
Panasonic LR03XWA
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 Compliance........................................................ Complies with ANSI/ISA S82.01-2004, CAN/CSA C22.2 61010-1-
04 to 600 V Measurement Category IV. Licensed by TÜV to
EN61010-1, Pollution degree 2
Certifications ................................................................. CSA, TÜV, P, , ATEX, IECEx
IP Rating ........................................................................ 67 (Non-operating. Protected against dust and the effect of
immersion up to 1 m for 30 min.)

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.
[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.
Input Characteristics
Function Overload
Protection
Input
Impedance
(nominal)
Common Mode
Rejection Ratio
(1 kΩunbalance)
Normal Mode Rejection
L1000 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
K1000 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 μA0.2μA
G1000 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 ±100 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 3.
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 LEAd 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 0L 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 “batt” 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 the table on the subsequent page
for a list of approved batteries. All cells are to be replaced at
the same time with same part number cells in fresh air
locations only.
Replace the batteries as follows, 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 ).
4. Make sure the battery compartment gasket (item ) is properly installed around the

Digital Multimeter
Basic Maintenance
11
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
It is recommended the batteries be removed from the Product for long
periods of storage.
Table 2. Approved Batteries
Battery Description Manufacturer
Duracell Procell MN2400 LR03 Duracell
Duracell Plus MN2400 LR03
Max Tech No. 4703 Varta
Industrial Alcaline No. 4003 [1]
Eveready Energizer No. E92 Eveready
Rayovac Alkaline AAA (U.S. Type) Rayovac
Panasonic LR03XWA Panasonic
[1] Minimum operating temperature is -10 °C.
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 3. 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 3. 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 4 is a list of the equipment necessary to do performance tests on the Meter.
Table 4. 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 5. Make sure the UUT measurement is between the low and
high limit shown in the table.
Table 5. Accuracy Tests
Step Test
Function Range Calibrator Output
UUT Measurement
Low Limit High Limit
1 
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 5. Accuracy Tests (cont.)
Step Test
Function Range 5520A Output
UUT Measurement
Low Limit High Limit
14 
AC Volts
Frequency
600 mV 150 mV, 99.95 kHz 99.93 mV 99.97 mV
15 600 mV 150 mV, 199.50 kHz 199.48 mV 199.52 mV
16 Sensitivity6 V 0.7 V, 99.95 kHz 99.93 V 99.97 V
17 60 V 7 V, 99.95 kHz 99.93 V 99.97 V
18 
Trigger level
6 V 3.4 V, 1 kHz Sq. Wave 999.8 V 1000.2 V
19 
Duty Cycle
6 V 5 V, 1 kHz, DC offset 2.5 V
Square Wave
49.7 % 50.3 %
20 
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 
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 
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 5. 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 nf Open input [1] 0.28 nf 0.48 nf
45 100 nf 5 nf [2] 4.7 nf 5.3 nf
46 100 μf 9.5 μf 9.2 nf 9.8 nf
47 
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 8 Vpp, 500 Hz Sq. Wave,
DC offset 2 V
-1.898 V to -
2.102 V
5.896 V to
6.104 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 6 is a list of the Meter buttons and their function for the calibration adjustment
procedure.

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Table 6. 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 .
CAL 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.
5. C-01 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 7 for
the calibration step shown in the display.

Digital Multimeter
Calibration Adjustments
17
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 7.
12. After you complete the last adjustment step, End shows in the display. Push Dto
complete the calibration adjustment procedure and store the calibration constants in
the Meter.
Table 7. Calibration Adjustment Steps
Function
(Switch Position) Adjustment Step Input Value

(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

(DC Volts)
C-09 6.000 V
C-10 60.00 V
C-11 600.0 V

(DC Millivolts)
C-12 600.0 mV
C-13 60.00 mV

(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
(Diode Test) C-21 3.000 V

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Table 7. Calibration Adjustment Steps (cont.)
Function
(Switch Position) Adjustment Step Input Value

(Amps)
C-22 6.000 A, 60 Hz
C-23 6.000 A dc

(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

(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
Change the Password
1. Push and hold down while you turn the rotary switch from OFF to . The
Meter shows YCALin the display.
2. Push Dtwo times to show ???? in the display.
3. Use the eight Meter buttons to type in the current password, but do not push D.
4. Push Cto show "_ _ _ _" in the display.
5. Use the eight Meter buttons to type in a new password.
6. Push Dto save the new password.
Set the Password to its Default Value
If the password was forgotten, it can be set to its default value (1234). See Figure 3.
1. Turn the rotary switch of the Meter to OFF.
2. Remove the bottom case and bottom shield of the Meter.
3. Apply a dc voltage between 3.5 V and 5 V at the test points marked “+” and “-” at
the edge of the board. (See Figure 3, item 1).

Digital Multimeter
Calibration Adjustments
19
S11
1
3.5 - 5 V
2
3
S11
2X-2- 3001 REV 011
grt102.eps
Figure 3. Reset the Password
4. Push and hold while you turn the rotary switch from OFF to J(See
Figure 3, item 2). The Meter shows YCALin the display.
5. Short across keypad button S11 on the PCB (See Figure 3, item 3). The Meter will
beep.
6. Turn the rotary switch one position counterclockwise to the OFF position.
The password is set to the default value of 1234.
7. Replace the bottom shield and bottom case of the Meter before you do adjustments or
tests.

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20
Lifetime Limited Warranty
Each Fluke 20, 70, 80, 170, 180 and 280 Series DMM will be free from defects in material and workmanship
for its lifetime. As used herein, “lifetime” is defined as seven years after Fluke discontinues manufacturing
the product, but the warranty period shall be at least ten years from the date of purchase. This warranty
does not cover fuses, disposable batteries, damage from neglect, misuse, contamination, alteration,
accident or abnormal conditions of operation or handling, including failures caused by use outside of the
product’s specifications, or normal wear and tear of mechanical components. This warranty covers the
original purchaser only and is not transferable. For ten years from the date of purchase, this warranty also
covers the LCD. Thereafter, for the lifetime of the DMM, Fluke will replace the LCD for a fee based on then
current component acquisition costs.
To establish original ownership and prove date of purchase, please complete and return the registration card
accompanying the product, or register your product on http://www.fluke.com. Fluke will, at its option, repair at
no charge, replace or refund the purchase price of a defective product purchased through a Fluke
authorized sales outlet and at the applicable international price. Fluke reserves the right to charge for
importation costs of repair/replacement parts if the product purchased in one country is sent for repair
elsewhere.
If the product is defective, contact your nearest Fluke authorized service center to obtain return authorization
information, then send the product to that service center, with a description of the difficulty, postage and
insurance prepaid (FOB Destination). Fluke assumes no risk for damage in transit. Fluke will pay return
transportation for product repaired or replaced in-warranty. Before making any non-warranty repair, Fluke
will estimate cost and obtain authorization, then invoice you for repair and return transportation.
THIS WARRANTY IS YOUR ONLY REMEDY. NO OTHER WARRANTIES, SUCH AS FITNESS FOR A
PARTICULAR PURPOSE, ARE EXPRESSED OR IMPLIED. FLUKE SHALL NOT BE LIABLE FOR ANY
SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS
OF DATA, ARISING FROM ANY CAUSE OR THEORY. AUTHORIZED RESELLERS ARE NOT
AUTHORIZED TO EXTEND ANY DIFFERENT WARRANTY ON FLUKE’S BEHALF. Since some states do
not allow the exclusion or limitation of an implied warranty or of incidental or consequential damages, this
limitation of liability may not apply to you. If any provision of this warranty is held invalid or unenforceable by
a court or other decision-maker of competent jurisdiction, such holding will not affect the validity or
enforceability of any other provision.
Fluke Corporation
P.O. Box 9090
Everett, WA 98206-9090
U.S.A.
Fluke Europe B.V.
P.O. Box 1186
5602 BD Eindhoven
The Netherlands
5/07