Fluke 28 II User Manual

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.
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

Calibration Information

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.

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Digital Multimeter

Safety Information

•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”.)

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28 II Ex

Calibration Information

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)	J	Earth ground
		DC (Direct Current)	I	Fuse
	X	Hazardous voltage	P	Conforms to European Union directives.
	W	Risk of Danger. Important		Diode
		information. See Manual.
		Battery. Low battery when	T	Double insulated
		displayed.
	R	Continuity test or continuity		Capacitance
		beeper tone.
		IEC Overvoltage Category III		IEC Overvoltage Category IV
		CAT III equipment is designed to		CAT IV equipment is designed to protect
		protect against transients in		against transients from the primary supply
				level, such as an electricity meter or an
	CAT III	equipment in fixed-equipment	CAT IV
				overhead or underground utility service.
		installations, such as distribution
		panels, feeders and short
		branch circuits, and lighting
		systems in large buildings.
	(	Conforms to ATEX directive.		Conforms to relevant Australian standards.
	®	Inspected and licensed by TÜV	Æ	Conforms to CAN/CSA-C22.2 No. 61010-1
		Product Services.		2nd, + Amendment 1.
	~	Do not dispose of this product as unsorted municipal waste. Go to Fluke’s website for
		recycling information.

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Digital Multimeter

General Specifications

General Specifications

Maximum voltage between any
terminal and earth ground ...........................................	1000 V rms
W Fuse for mA inputs..................................................	440 mA, 1000 V FAST Fuse
W Fuse 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.)

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28 II Ex

Calibration Information

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)					±(2 % + 4)	±(2 % + 20) [1]
	6.000 V	0.001 V
	60.00 V	0.01 V				±(1.0 % + 4)		±(2 % + 4) [2]	Unspecified
	600.0 V	0.1 V							Unspecified
	1000 V	1 V	±(0.7 % + 2)					Unspecified	Unspecified
	Low-Pass Filter			±(1.0 % + 4)	[1]	+1.0 % + 4	Unspecified	Unspecified	Unspecified
						-6.0 % - 4 [3]

[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)
		6.000	V	0.001 V
	V dc	60.00	V	0.01 V	±(0.05 % + 1)
		600.0	V	0.1 V
		1000 V		1 V
		600.0	Ω	0.1 Ω	±(0.2 % + 2) [2]
		6.000 kΩ		0.001 kΩ	±(0.2 % + 1)
	Ω	60.00 kΩ		0.01 kΩ
		600.0 kΩ		0.1 kΩ	±(0.6 % + 1)
		6.000	MΩ	0.001 MΩ
		50.00	MΩ	0.01 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 MΩ in the 50 MΩ range, 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	0.1	°C		±(1.0 % + 10)
-328	°F to +1994 °F	0.1	°F		±(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.

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