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Fluke 1577 Insulation Multimeter

Model: 1577

Comes a digital insulation tester with all the features of a True RMS digital multimeter in a single. This insulation multimeter comes in a compact and handheld design, which enables maximum versatility for both troubleshooting and preventative maintenance. Additionally, this product is also rugged, reliable, and easy to use.

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$647.99 USD

was $719.99

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The Fluke 1577 Insulation Multimeter combines a digital insulation tester with a full-featured, true-rms digital multimeter in a single compact, handheld unit, which provides maximum versatility for both troubleshooting and preventative maintenance.

Like other tools that you have come to expect from Fluke, the 1577 is rugged, reliable, and easy to use.

Whether you work on motors, generators, cables, or switch-gear, the Fluke 1577 Insulation Multimeter is ideally suited to help you with your tasks.

What's Included

  • Remote probe
  • Test leads
  • Alligator clips
  • Hard case
  • User documentation

Fluke 1577 Specifications

Voltage DC
Maximum Voltage 1000 V
Accuracy ±(0.2% + 2)
Maximum Resolution 0.001 V
Voltage AC
Maximum Voltage 1000 V
Accuracy ±(2% + 3)
Maximum Resolution 0.1 mV
Current DC
Maximum Amps 400 mA
Amps Accuracy ±(1.0% + 2)
Maximum Resolution 0.01 mA
Current AC
Maximum Amps 400 mA
Amps Accuracy ±(2.0% + 2)
Maximum Resolution 0.01 mA
Maximum Resistance 50 MΩ
Accuracy ±(1.2% + 2)
Maximum Resolution 0.1 Ω
Insulation Test
Minimum Test Current at 1 kΩ/V 1 mA
Test Voltages 500, 1000 V
Maximum Resistance per Test Voltage 50 V
100 V
250 V
500 V
1000 V: 600 MΩ
Maximum Resolution per Test Voltage 50 V: 0.01 MΩ
100 V: 0.01 MΩ
250 V: 0.1 MΩ
500 V: 0.1 MΩ
1000 V: 0.1 MΩ
Accuracy per Test Voltage 50 V: ±(3% + 5)
100 V: ±(3% + 5)
250 V: ±(1.5% + 5)
500 V: ±(2.0% + 5)
1000 V: ±(2.0% + 5)
Environmental Specifications
Operating Temperature -4 to 131°F (–20 to 55°C)
Storage Temperature -40 to 140°F (-40 to 60°C)
Humidity (Without Condensation) 0 to 95%: 50 to 86°F (10 to 30°C)
0 to 75%: 86 to 104°F (30 to 40°C)
0 to 40%: 104 to 131°F (40 to 55°C)
Operating Altitude 6561.68' (2000 m)
Mechanical and General Specifications
Battery Life Alkaline Meter use: 1000 hours
Insulation test use: Meter can perform at least 1000 insulation tests with fresh alkaline batteries at room temperature. These are standard tests of 1000 V into 1 MΩ with a duty cycle of 5 seconds on and 25 seconds off
Dimensions 7.99 x 3.94 x 1.97" (203 x 100 x 50 mm) (with holster)
Weight 22 oz (624 g)
IP Rating IP40
Safety Specifications
Overvoltage Category Complies with ANSI/ISA 82.02.01 (61010-1) 2004, CAN/CSA-C22.2 NO. 61010-1-04, and IEC/EN 61010-1 2nd Edition for measurement CAT III 1000 V and CAT IV 600 V
Agency Approvals 2000 m CAT III 1000 V, CAT IV 600 V; 3000 m CAT II 1000 V, CAT III 600 V
Click here for complete specifications on the Fluke 1577

What's included with the Fluke 1577

  • Multimeter
  • Remote Probe
  • Test Leads
  • Alligator Clips
  • Carrying Case
  • User Documentation
  • Three-Year Warranty
Fluke 1587 FC Insulation Multimeter Fluke 1577 Insulation Multimeter Fluke 1503 Insulation Resistance Meter Fluke 1507 Insulation Resistance Tester Fluke 1550C Insulation Resistance Tester Fluke 1555 Insulation Resistance Tester
Two in one tools Stand-alone tools
Insulation test features 1587 FC 1577 1503 1507 1550C 1555
Test voltages 50 V, 100 V, 250 V, 500 V, 1000 V 500 V, 1000 V 500 V, 1000 V 50 V, 100 V, 250 V, 500 V, 1000 V 250 V to 5000 V 250 V to 10,000 V
Insulation resistance range 0.01 MΩ to 2 GΩ 0.01 MΩ to 600 GΩ 0.01 MΩ to 2000 GΩ 0.01 MΩ to 10 GΩ 250 kΩ to 1 TΩ 250 kΩ to 2 TΩ
Auto discharge
Timed ramp test (Breakdown)
Pass/fail comparison
Est. # of IRT tests 1000 1000 2000 2000 Various Various
Voltage > 30 V warning
Memory With Fluke Connect App
Remote test probe
Lo ohms/earth-bond continuity 200 mA source (10 mΩ resolution) 200 mA source (10 mΩ resolution)
Display Digital LCD Digital LCD Digital LCD Digital LCD Digital LCD/ analog display Digital LCD/ analog display
Multimeter features
AC/DC volts

Note: Not all product features and specifications are listed in this table. For more complete information, see individual product data sheets.

1. Function useful for checking connections and motor windings. Also useful for users who are required to perform earth-bond continuity measurements during installation testing.
2. Filter for variable-speed motor drive measurements.

Continuity beeper
Temperature (contact)
Lo-pass filter2
Diode test
Other features
Software Fluke Connect compatible FlukeView® Forms Basic Fluke View® Forms Basic
Battery 4 AA (NEDA 15A or IEC LR6) 4 AA (NEDA 15A or IEC LR6) 4 AA (NEDA 15A or IEC LR6) 4 AA (NEDA 15A or IEC LR6) Rechargeable Rechargeable
Find out more about insulation testing


Click on a category to view a selection of compatible accessories with the Fluke 1577 Insulation Multimeter.

Fluke 80AK-A Thermocouple Adapter 80AK-A
Designed to adapt K type thermocouples mini-connector to dual shrouded banana plug inputs. Additionally, it is ideal for low voltage applications below 30 V AC and 60 V DC.
$32.99 USD

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Fluke TL27 Heavy Duty Test Lead Set TL27
DMM test leads (red, black) with safety shrouded, standard diameter banana plugs.
$39.99 USD

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Fluke TLK-225 SureGrip™ Master Accessory Set TLK-225
A replacement kit that provides flexibility and comfort, and comes equipped with all SureGrip™ leads and probes.
$152.99 USD

was $169.99

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Fluke TP220 SureGrip™ Industrial Test Probes TP220
For use with the TL222 and TL224. Additionally, these industrial test probes feature 0.5" (12 mm) stainless steel tips that provide reliable contact and flexible finger barrier, which improves grip.
$21.99 USD

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Fluke TPAK ToolPak Magnetic Meter Hanger ToolPak
Hang your meter in a variety of ways for convenient hands-free operation. Attaches to most Fluke meters.
$46.99 USD

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Fluke C101 Hard Carrying Case C101
Compatible with a vareity of Fluke industrial test tools. Additionally, this hard carrying case features a foam interior.
$79.99 USD

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Fluke CXT170 CXT170
Rugged Pelican Hard Case for the Fluke 170 Series.
$197.99 USD

was $219.99

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Fluke C25 Large Soft Carrying Case for Digital Multimeters C25
Featuring a durable, zippered carrying case with padding and inside pocket, and high quality polyester exterior. It includes a convenient hand strap and carries most of Fluke's popular digital multimeters.
$44.99 USD

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Fluke C550 Premium Tool Bag C550
Tool Bag with steel reinforced frame.
$98.99 USD

was $109.99

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Fluke i400 AC Current Clamp, 400 A AC I400
For use with digital multimeters, this current clamp allows users to take accurate current measurements without breaking electric circuits. Additionally, it measures up to 400 A AC.
$148.49 USD

was $164.99

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Fluke i200 AC Current Clamp I200
A single range 200 A clamp-on AC current clamp with current output via safety shrouded banana plugs. It is compatible with most Fluke multimeters or any other current measurement device that accepts shrouded banana plugs.
$152.99 USD

was $169.99

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Fluke i1010-KIT Current Clamp Kit I1010-KIT
Includes carrying case.
$418.49 USD

was $464.99

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Fluke L210 Probe Light Kit L210
Comes in a small and rugged design, this probe light kit liberates the users' hands for work. Additionally, it features a bright white LED and fits between the modular test probe and test lead.
$54.99 USD

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Fluke L200 Probe Light L200
Easily attaches to any Fluke test probe.
$34.99 USD

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Fluke LVD1A Volt Light LVD1A
Handy Fluke Volt Light compact LED flash-lights with built-in color responsive AC non-contact voltage detector.
$44.99 USD

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Fluke 80PK-27 SureGrip™ Industrial Surface Temperature Probe 80PK-27
Compatible with any temperature measuring instrument that accepts type K thermocouples features a miniature connector input and a cold reference junction compensation. Additionally, this industrial surface temperature probe is ideal for surfaces in rugged environments.
$314.99 USD

was $349.99

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Fluke 80PK-3A Surface Temperature Probe 80PK-3A
Compatible with any temperature measuring instrument that accepts type K thermocouples and features a miniature connector input. Additionally, this surface temperature probe is ideal for measuring the temperature of flat or slightly convex surfaces, with an exposed junction to allow direct contact with the surface being measured.
$152.99 USD

was $169.99

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Fluke 80PK-8 Pipe Clamp Temperature Probe 80PK-8
Uses Type-K thermocouple for fast temperature and superheat measurements of pipe surfaces. Designed to reliably measure the temperature of pipes ¼" (6 mm) to 1⅜" (35 mm) in diameter, at temperatures between -20 and 300°F (-29 and 149°C), while retaining a long service life.
$170.99 USD

was $189.99

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Fluke AC285 SureGrip™ Alligator Clips AC285
Designed to improve steadiness in slippery hands, and is for use with TL222 and TL224 test leads. Rubber over-molded surfaces and finger-hugging curves give a comfortable, reliable grip so you can focus on making an accurate measurement.
$28.99 USD

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Customer Reviews for the Fluke 1577