User's Manual

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771 English Instruction Sheet

Page 1

771

Milliamp Process Clamp Meter

Instruction Sheet

Introduction

The Fluke 771 Milliamp Process Clamp Meter (“the Meter”) is a

hand-held battery-operated clamp meter that measures

4-20 mA dc without breaking the electrical circuit. Unlike

conventional clamp meters, the Meter features a remote jaw that

is connected to the main body via extension cable.

Features

• DC mA measurement (4-20 mA) using a remotely connected

clamp via extension cable

• Electronic zero

• Percentage span (0-100 %)

• Hold

• Display backlight

• Auto power off

• Measurement spotlight LED

The Meter comes with:

• Two AA alkaline batteries (installed)

• Soft case

• Instruction sheet

2567301

September 2006

All product names are trademarks of their respective companies

Summary of content (12 pages)

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771 English Instruction Sheet Page 1 ® 771 Milliamp Process Clamp Meter Instruction Sheet Introduction The Fluke 771 Milliamp Process Clamp Meter (“the Meter”) is a hand-held battery-operated clamp meter that measures 4-20 mA dc without breaking the electrical circuit. Unlike conventional clamp meters, the Meter features a remote jaw that is connected to the main body via extension cable.
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771 English Instruction Sheet Page 2 Contacting Fluke To contact Fluke, use one of the following telephone numbers: USA: 1-888-99-FLUKE (1-888-993-5853) Canada: 1-800-36-FLUKE (1-800-363-5853) Europe: +31 402-675-200 Japan: +81-3-3434-0181 Singapore: +65-738-5655 Anywhere in the world: +1-425-446-5500 Or visit Fluke’s Web site at: www.fluke.com. Register the Meter at: http://register.fluke.
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771 English Instruction Sheet Page 3 • Use extreme caution when working around bare conductors or bus bars. Contact with the conductor could result in electric shock. • To avoid false readings that can lead to electrical shock and injury, replace the batteries as soon as the low battery indicator B appears. • Adhere to local and national safety codes. Individual protective equipment must be used to prevent shock and arc blast injury where hazardous live conductors are exposed.
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771 English Instruction Sheet Page 4 Getting Acquainted with the Meter 9 6 5 4 3 2 7 1 8 ege01a.eps Number Description A Turns the Meter on and off. When the Meter is in sleep mode, press this button to wake it up. B Captures and holds the current reading C Removes interference and zeros the display D Measurement spotlight LED button E Measurement spotlight LED F Detachable clamp G Turns the backlight off and on H LCD I Tactile Barrier docked and un-docked Figure 1.
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771 English Instruction Sheet Page 5 Features The following sections give more detail about the Meter’s features. Percentage Span The Percentage Span feature displays the span for 4 to 20 mA loops. 20 mA 100 % 4 mA 0% 16 mA 75 % 3.6 mA -2.5 % 12 mA 50 % 3.2 mA -5.0 % 8 mA 25 % 2 mA -12.5 % Zero Adjust Before taking each measurement, push A to zero the display by removing dc offset. Make sure the clamp jaws are closed and no current is flowing through them.
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771 English Instruction Sheet Page 6 Display HOLD XWWarning To avoid electric shock, when Display HOLD is activated, the display will not change when a different current is applied. Pressing H activates Display Hold mode. His displayed and the Meter freezes the display. To exit and return to normal operation, press H a second time. Auto Off The Meter automatically turns off after 15 minutes of inactivity. To disable the Auto Off feature, hold down H while turning on the Meter.
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71 English Instruction Sheet Page 7 1. With the clamp disconnected from any conductor, press O to turn the Meter on and press A. 2. Clamp the jaw around the conductor under test. The Meter displays the measured conductor current. See Figure 2. • A positive reading indicates current flowing in the direction of the arrow on the clamp. • A negative reading indicates current flowing in the opposite direction of the arrow. • Do not clamp more than one wire. Currents cancel and no results are returned.
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771 English Instruction Sheet Page 8 Maintenance XWWarning To avoid possible electric shock or personal injury, repairs or servicing not covered in this manual should be performed only by qualified personnel. Cleaning the Meter XWWarning To avoid electrical shock, remove any input signals before cleaning. W 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 Meter.
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771 English Instruction Sheet Page 9 Battery Replacement XWWarning To avoid false readings, that could lead to possible electric shock or personal injury, replace the battery as soon as the low battery indicator (B) appears. To replace the battery (see Figure 3): 1. Turn the Meter off. 2. Use a flat head screwdriver to loosen the battery compartment door screw, and remove the door from the case bottom. 3. Remove the battery. 4. Replace the battery with two new AA batteries. 5.
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771 English Instruction Sheet Page 10 Specifications Current Ranges Resolution Accuracy 20.99 mA range 99.9 mA range Maximum Reading Influence of Earth’s Field Battery Working hours Size (H X W X L) Weight Operating Temperature Storage Temperature Operating Humidity Operating Altitude Storage Altitude IP Rating Vibration Requirements EMI, RFI, EMC Temperature Coefficients ±20.99 mA 0.01 mA ±21.0 mA -±99.9 mA 0.1 mA 0.2 % reading ±5 digits 1 % reading ±5 digits ±99.9 mA < 0.20 mA 2 AA 1.
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771 English Instruction Sheet Page 11 User Replaceable Parts Table 2 lists all user replaceable parts. Table 2. Replaceable Parts Part or Model Number Description Quantity 376756 AA Batteries, 1.5 V 2 2687457 Absorber 1 2720304 Battery door 1 948609 Fastener 1 2726174 Soft Carrying Case 1 2567301 Instruction Sheet 1 2742724 Service Information Sheet 1 Replacement clamp and cable assembly are available but require recalibration.
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771 English Instruction Sheet Page 12 LIMITED WARRANTY & LIMITATION OF LIABILITY This Fluke product will be free from defects in material and workmanship for 3 years (one year for cable and clamp) from the date of purchase. This warranty does not cover fuses, disposable batteries or damage from accident, neglect, misuse or abnormal conditions of operation or handling. Resellers are not authorized to extend any other warranty on Fluke’s behalf.