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Instruction Sheet Introduction The Fluke 705 Loop Calibrator is a source and measurement tool for 0 to 20 mA or 4 to 20 mA current loop testing and a measurement tool for dc voltage from 0 to 28 V. The calibrator does not source and measure simultaneously.
English Instruction Sheet Page 2 Warning To avoid possible electric shock or personal injury: • Never apply more than 30 V between any two terminals, or between any terminal and earth ground. • Inspect the test leads for damaged insulation or exposed metal.
English Instruction Sheet Page 3 Pushbutton Functions Button Function Press to select source, simulate, or measure modes. Press while turning on the calibrator to select loop power. The Loop symbol appears in the display. Press simultaneously to start the SpanCheck function.
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English Instruction Sheet Page 4 Sourcing mA Use source mode whenever you need to supply current into a passive circuit. Insert the test leads into the terminals as shown below. Note A path must exist for current to flow between the output + and −mA terminals, otherwise the display will indicate an overload (OL) when you set an output value.
How to Contact Fluke LIMITED WARRANTY & LIMITATION OF LIABILITY This Fluke product will be free from defects in material and workmanship for three years 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.
English Instruction Sheet Page 6 Simulating a Transmitter When simulating the operation of a transmitter, the calibrator regulates the loop current to a known value that the user selects. A 12 to 28 V loop supply must be available. Insert the test leads as shown below.
English Instruction Sheet Page 7 Auto Ramping the mA Output Auto ramping allows you to continuously apply a varying current stimulus from the calibrator to a passive (sourcing) or active (simulate) loop while your hands remain free to test the transmitter’s response.
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English Instruction Sheet Page 8 Changing the Current Span The calibrator’s current output span has two settings: • 4 mA = 0 %, 20 mA = 100 % (default) • 0 mA = 0 %, 20 mA = 100 % (optional) To change and save the current output span in a nonvolatile memory (retained when the power is turned off), press U while turning on the calibrator to mA.
English Instruction Sheet Page 9 Measuring dc mA with Loop Power Loop power provides +24 V to power a transmitter and to read loop current simultaneously. To exit, turn the calibrator off or to V. LOOP CALIBRATOR Measure Press and hold while turning on the calibrator to mA.
• Remove any input signals prior to removing test leads and opening case. • When servicing the calibrator, use only specified replacement parts. For maintenance procedures not described in this sheet, contact a Fluke Service Center. 1.800.561.8187 information@itm.com www. .com...
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In Case of Difficulty Check the battery and test leads. Replace as needed. If the calibrator needs repair, contact a Fluke Service Center. If the calibrator is under warranty, see the warranty statement for terms. If the warranty has lapsed, the calibrator will be repaired and returned for a fixed fee.
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English Instruction Sheet Page 12 Replacing the Battery Warning To avoid false readings, which could lead to possible electric shock or personal injury, replace the battery as soon as the battery indicator ( ) appears in the display. rt07f.eps 1.800.561.8187 information@itm.com www.
English Instruction Sheet Page 13 Replacement Parts and Accessories Replacement Parts PN or Item Description Model No. Qty. 9 V battery, ANSI/NEDA 614487 1604A or IEC 6LR61 Holster, Yellow MP85 Case top 665098 MP86 Case bottom 665109 Case screw 832246 MP89 Non-skid foot 885884...
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English Instruction Sheet Page 14 MP85 MP86 MP89 MP92 CD-ROM AC72 Alligator Clips TL75 Test Lead Set rt10f.eps 1.800.561.8187 information@itm.com www. .com...
English Instruction Sheet Page 15 Specifications Specifications are based on a one year calibration cycle and apply from +18 °C to +28 °C unless stated otherwise. “Counts” means number of increments or decrements of the least significant digit. DC Volts Input Range: + 28 V (+ 30 V max) Input Impedance: 1 MΩ...
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English Instruction Sheet Page 16 General Specifications Maximum voltage applied between any terminal and earth ground or between any two terminals: 30 V Storage temperature: -40 °C to 60 °C Operating temperature: -10 °C to 55 °C Operating altitude: 3000 meters maximum Temperature coefficient: ±0.005 % of range per °C for the temperature ranges -10 to 18 °C and 28 to 55 °C Relative humidity: 95 % up to 30 °C, 75 % up to 40 °C, 45 % up...