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Fluke 1577 Insulation Multimeter, 1000 V

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$888.15
SKU:
1577
Availability:
2 in Stock
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Fluke 1577 Insulation Multimeter, 1000 V

$888.15

Availability: 2 in Stock

Fluke 1577 Offers

Features

  • Auto discharge of capacitive voltage
  • AC/DC voltage
  • DC millivolts
  • AC/DC milliamps
  • Continuity
  • Auto power off to save battery power
  • True RMS
  • Large display with backlight
  • Live circuit detection prevents insulation test if voltage <30 V is detected for added user protection
  • CAT III 1000V, CAT IV 600V measurement category
  • Accepts magnetic hanging system to free your hands for other work (sold separately)

Applications

  • Troubleshooting
  • Preventative maintenance

Disconnect any electronic devices like motor drives, PLC’s, transmitters, etc. before performing insulation testing. Electronics can be damaged by applying higher than normal voltage.

The effect of temperature should be considered - it is recommended that tests be performed at a standard conductor temperature of 20 °C (68 °F) or that a temperature baseline is established while compensating future readings by using a DMM with a probe or an infrared thermometer.

Select a test voltage appropriate for the insulation being tested. The objective is to stress the insulation but not to over-stress it. When in doubt, use a lower test voltage. It’s usually appropriate to test insulation at twice the voltage it normally sees: for example 460 V to 600 V rated equipment is often tested at 1000 V.

When using an insulation tester, leave the leads connected when you stop the test. The insulation tester can discharge any residual test voltage.

Conductors that are close to each other have a normal capacitance. This will cause an insulation resistance reading to start low and increase steadily until it stabilizes. This type of increase is normal, but if the reading jumps violently down and up again this indicates arcing.

Although the current is tightly limited, an insulation tester can generate sparks and minor but painful burns. The unexpected surprise can cause an operator to jerk away. As always, work away from live systems and use safe work practices when working overhead.

Facilities Maintenance Challenges and the Fluke Solutions

Facilities maintenance professionals face a wide range of challenges, from electrical and mechanical equipment uptime to overall safety concerns. It’s critical to maintain facilities and the associated assets at peak performance. Let's review the issues faced by maintenance managers, IT support, and electrical/mechanical technicians. Along with the Fluke solutions that offer to save you time and money while increasing efficiency and safety. Fluke makes reliable, rugged and accurate tools to maintain electromechanical systems, motors, pumps, electrical distribution systems and more to keep your world up and running.



Fluke 1577 Specifications

Specifications

Voltage DC
Maximum Voltage1000 V
Accuracy±(0.2% + 2)
Maximum Resolution0.001 V
Voltage AC
Maximum Voltage1000 V
Accuracy±(2% + 3)
Maximum Resolution0.1 mV
Current DC
Maximum Amps400 mA
Amps Accuracy±(1.0% + 2)
Maximum Resolution0.01 mA
Current AC
Maximum Amps400 mA
Amps Accuracy±(2.0% + 2)
Maximum Resolution0.01 mA
Resistance
Maximum Resistance50 MΩ
Accuracy±(1.2% + 2)
Maximum Resolution0.1 Ω
Insulation Test
Minimum Test Current at 1 kΩ/V1 mA
Test Voltages500, 1000 V
Maximum Resistance per Test Voltage50 V 100 V 250 V 500 V 1000 V: 600 MΩ
Maximum Resolution per Test Voltage50 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 Voltage50 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 Altitude6561.68' (2000 m)
Mechanical and General Specifications
Battery Life AlkalineMeter 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
Dimensions7.99 x 3.94 x 1.97" (203 x 100 x 50 mm) (with holster)
Weight22 oz (624 g)
IP RatingIP40
Safety Specifications
Overvoltage CategoryComplies 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 Approvals2000 m CAT III 1000 V, CAT IV 600 V; 3000 m CAT II 1000 V, CAT III 600 V


What's included with the Fluke 1577
  • Multimeter
  • Remote Probe
  • Test Leads
  • Alligator Clips
  • Carrying Case
  • User Documentation
  • Three-Year Warranty
Shipping & Return Policy — EquipTestPro
Last Updated: February 1, 2026
Legal Policies

Shipping & Return Policy

Everything you need to know about orders, cancellations, refunds, and delivery.

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Section 01
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Please Note: Certain products are subject to restrictions and cannot be shipped to all destinations. Product-specific shipping availability is noted on each item's detail page. We do not currently ship to international destinations outside of Canada and the United States.
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Section 02
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Flat-rate shipping is calculated to reflect the cost of reliable, insured delivery. The rate shown at checkout is final — no hidden surcharges will be added after your order is placed.

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Section 03
Weight-Based Shipping

For certain items, shipping costs are calculated based on the weight of the product. The weight of any weight-based item is listed on its product detail page.

Rounding Policy: To align with the policies of our shipping carriers, all item weights are rounded up to the next full pound when calculating shipping costs.

For example, an item weighing 3.2 lbs will be rated at 4 lbs for shipping calculation purposes. This policy is standard practice across all major carriers we work with.

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Section 04
Product Restrictions

Some products sold on EquipTestPro are subject to shipping restrictions due to regulatory, carrier, or safety requirements. These include but may not be limited to:

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Where restrictions apply, this will be clearly noted on the product listing. If you have questions about a specific product's shipping eligibility to your location, please contact us before placing your order.

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Section 05
Order Processing

Orders are processed on business days (Monday through Friday, excluding statutory holidays). Orders placed after business hours or on weekends will begin processing the following business day.

1
Order Confirmed You receive an email confirmation with your order details.
2
Order Processed Your order is verified and prepared for shipment (1–2 business days).
3
Shipped You receive a tracking number by email once your package is dispatched.
4
Delivered Delivery timelines vary by destination and carrier availability.
Section 01
Order Cancellation Rights

You are entitled to cancel your Order within 30 days of receipt without providing a reason, subject to the processing fee structure described below.

The cancellation deadline is 30 days from the date on which you received the Goods, or on which a third party appointed by you (other than the carrier) takes possession of the delivered product.

To exercise your cancellation right, notify us with a clear written statement by:

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Section 02
Cancellation Processing Fees

The following fee structure applies to all cancellations. Please review carefully before requesting a cancellation.

Customer-Initiated
10%

A processing fee of 10% of the total order value will be withheld from your refund to cover payment processing, handling, and administrative costs.

Company-Initiated (Item Unavailable)
$0

If we cancel your order due to item unavailability, no processing fee will be withheld. You receive a full refund of the amount paid.

Refunds will be issued using the same payment method as the original purchase. No additional fees beyond those described above will be applied.

Section 03
Conditions for Returns

To be eligible for a return, all of the following conditions must be met:

  • The Goods were purchased within the last 30 days
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  • A valid receipt or proof of purchase accompanies the return
Sale Items: Only regular-priced Goods are eligible for a refund. Items purchased on sale or at a discounted price cannot be refunded. This exclusion may not apply where prohibited by applicable law.

We reserve the right to refuse returns of any merchandise that does not meet the above conditions, at our sole discretion.

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Section 04
Non-Returnable Goods

The following items are not eligible for return under any circumstances:

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Section 05
How to Return Goods

You are responsible for the cost and risk of returning Goods to us. Before sending any items, please contact us at info@equiptestpro.com to obtain the return shipping address.

Important: We strongly recommend using an insured and trackable mail service. We cannot be held responsible for Goods damaged or lost during return shipment, and we are unable to issue a refund without confirmed receipt of the returned Goods or verifiable proof of delivery.
Section 06
Refund Timeline

You should expect to receive your refund within four (4) weeks of delivering your return package to the shipper. In many cases, refunds are processed sooner. The timeline breaks down as follows:

1
Transit to Us 5 to 10 business days for us to receive your return from the shipper.
2
Return Processing 3 to 5 business days to inspect and process your return once received.
3
Bank Processing 5 to 10 business days for your bank to post the refund to your account.

We will process refunds no later than 14 days from the day we receive the returned Goods, using the same payment method as your original purchase.

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Section 07
Gift Returns

If the Goods were marked as a gift at the time of purchase and shipped directly to you, a gift credit equal to the return value (less any applicable processing fee) will be issued. Once the returned product is received and inspected, a gift certificate will be mailed to you.

If the Goods were not marked as a gift at purchase, or if the gift giver had the order shipped to themselves first, the refund will be issued to the original purchaser.

Questions? We're here to help.

Reach out to our support team for assistance with any order or return.

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    All returns must be authorized. Items returned prior to authorization will not be accepted. For international customers where applicable, customers must ship any returns to us freight and duty prepaid. Return freight charges for internationsl shippments will be the responsibility of the customer.

    Defective new equipment may be returned for warrantyrepair/exchange to us within (5) days of the shipment receipt date. After five (5) days, returns will be handled by direct contact and in accordance with the warranty terms of the item's manufacturer. Items that have malfunctioned due to mishandling, electrical overload, etc., will be subject to repair charge.

    Non defective new equipment will be authorized for return within five (5) days of the shipment receipt date if the equipment is still in new, re-sellable condition with the original manual(s), accessories, packing material and carton. We reserve the right to reject returnsin which there is no original packaging, missing accessories, damage or visible signs of usage of the item. A restocking fee of up to 25% of purchase price may apply. Special orders and dangerous goods are non-returnable.

    (Do not write anytingon the manufacturer's original package or use as a shipping carton. Include all accessories, manuals and warranties.)

    Please, include a copy of the packing list or invoice with a reason for the return. Your return authorization number is valid for thirty (30) days.

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