Fluke 28 II Ex Calibration Information

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 N function, 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.

Fluke 28 II Ex Specifications

General

Diode test	Yes
Product type	Digital multimeter
Product color	Black, Red
Frequency range	0.0005 - 199.99 kHz
DC current range	0.0000001 - 10 A
DC voltage range	0.0001 - 1000 V
Resistance range	0.1 - 50000000 Ω
Measuring category	CAT IV 600V
Placement supported	Handheld multimeter
Basic accuracy (frequency)	0.005%
Basic accuracy (DC current)	0.2%
Basic accuracy (DC voltage)	0.05%
Temperature measurement range	-200 - 1090 °C
Battery type	AAA
Power source	Battery
Battery technology	Alkaline
Number of batteries supported	3
Operating altitude	0 - 2000 m
Maximum storage altitude	10000 m
Operating relative humidity (H-H)	0 - 80 %

Weight and Dimensions

Depth	198.1 mm
Width	100 mm
Height	6.35 mm
Weight	698.5 g