# Fluke 1587 FC Insulation Multimeter # Fluke 1587 FC Insulation Multimeter ## Key Features At A Glance - Maximum input voltage 1000 V; CAT III 1000 V / CAT IV 600 V measurement category for industrial and distribution work - Two-in-one design: digital insulation tester combined with full-featured true-RMS digital multimeter in a single handheld unit - Insulation test range from 0.01 MΩ to 2 GΩ (1587 FC) or 0.1 MΩ to 600 MΩ (1577); test voltages 50/100/250/500/1000 V on 1587 FC, 500/1000 V on 1577 - Live circuit detection inhibits insulation test when terminal voltage exceeds 30 V; auto-discharge of capacitive voltage after test - Three-year standard warranty, extendable to five years through product registration within 45 days of purchase - Large 6000-count backlit display with rugged hard case and included remote probe, test leads, and alligator clips - Fluke Connect compatible on 1587 FC: wireless PI/DAR timed ratio tests with TrendIt graphs, memory storage, and temperature compensation through the app - VFD low-pass filter on 1587 FC for accurate true-RMS voltage measurements on variable frequency motor drives The Fluke 1587 FC and 1577 Insulation Multimeters combine a digital insulation tester with a full-featured, true-RMS digital multimeter in a single compact, handheld unit. Both models share the same physical platform and CAT III 1000 V / CAT IV 600 V safety rating, but differ in measurement breadth and connectivity: the 1587 FC adds Fluke Connect wireless capability, a wider insulation test voltage range (50 V, 100 V, 250 V, 500 V, 1000 V), a VFD low-pass filter, frequency, capacitance, diode test, temperature, and Min/Max functions, while the 1577 covers the core insulation testing application at 500 V and 1000 V with the standard DMM functions. An insulation multimeter combines two separate instruments that electricians, motor maintenance technicians, and industrial maintenance teams have historically had to carry separately: a megohmmeter for testing the insulation integrity of motor windings, cables, and electrical distribution components, and a digital multimeter for routine voltage, current, and resistance troubleshooting. Combining them into one handheld unit reduces the number of tools required for motor and drive maintenance, electrical commissioning, and preventative maintenance routes — particularly valuable when working at heights, in confined spaces, or on service calls where carrying multiple instruments is impractical. ## Brand Heritage Fluke Corporation was founded in 1948 in Seattle, Washington by John Fluke Sr. The company has been part of the Danaher Corporation industrial conglomerate since 1998, and since 2016 has operated under Danaher's spin-off Fortive Corporation. The Fluke brand has been maintained consistently across these ownership transitions — instruments sold under the Fluke name today share the same brand lineage as instruments manufactured decades earlier under the original John Fluke Manufacturing Company. ## Compare Other Models in This Series The Fluke 1587 FC and 1577 share a common platform — same physical form factor, same safety ratings, same core DMM measurement functions, and the same three-year warranty extendable to five years through Fluke registration. Both combine an insulation tester with a true-RMS DMM in a single handheld unit rated for CAT III 1000 V / CAT IV 600 V environments, and both include the same hard case, remote probe, test leads, and alligator clips. The two models differ along two axes: insulation testing breadth and feature set. The 1587 FC offers five insulation test voltages (50, 100, 250, 500, 1000 V) across a 0.01 MΩ to 2 GΩ range and adds frequency, capacitance, diode test, temperature, Min/Max, VFD low-pass filter, and Fluke Connect wireless capability. The 1577 offers two insulation test voltages (500, 1000 V) across a 0.1 MΩ to 600 MΩ range with the core DMM functions only — a streamlined choice when the application centers on routine insulation checks at standard voltages without the broader DMM and connectivity feature set. Each new model below is its own dedicated product page with condition-matched pricing and the appropriate documentation. Select the model that matches your application requirement — insulation test voltage range, DMM feature breadth, and connectivity needs — and the product page will reflect the corresponding specifications and accessory list. The 1587 FC is the broader-capability model: five insulation test voltages spanning from 50 V (suitable for low-voltage electronic and telecom work) to 1000 V (motor and distribution work), insulation measurement to 2 GΩ, and a full feature set including capacitance, frequency, temperature with K-type thermocouple, diode test, Min/Max, and the VFD low-pass filter for variable frequency drive measurements. Fluke Connect support adds wireless PI/DAR testing with TrendIt graphs, memory storage, and temperature compensation through the smartphone app. The 1577 is the focused-application model: two standard insulation test voltages (500 V and 1000 V) covering the most common motor and electrical maintenance test routines, insulation measurement to 600 MΩ, and the core true-RMS DMM functions (AC/DC voltage, DC millivolts, AC/DC milliamps, resistance, continuity). The 1577 does not include capacitance, frequency, diode test, temperature, Min/Max, VFD filter, or Fluke Connect. The comparison table below summarizes the specification differences between the two models. Model Insulation Test Range Insulation Test Voltages Fluke Connect **1587 FC** 0.01 MΩ to 2 GΩ 50, 100, 250, 500, 1000 V Yes 1577 0.1 MΩ to 600 MΩ 500, 1000 V No 1587/MDT FC 0.01 MΩ to 2 GΩ 50, 100, 250, 500, 1000 V Yes 1587KIT/62MAX+ 0.01 MΩ to 2 GΩ 50, 100, 250, 500, 1000 V Yes Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below. ## Accessories Supplied - Remote probe - Test leads and probes - Alligator clips - K-type thermocouple - Hard case - User documentation ## Product Core & Specifications General Specifications Maximum voltage applied to any terminal and common 1000 V Storage temperature \-40 °C to 60 °C (-40 °F to 140 °F) Operating temperature \-20 °C to 55 °C (-4 °F to 131 °F) Temperature coefficient 0.05 x (specified accuracy) per °C for temperatures <18 °C or >28 °C (<64 °F or >82 °F) Relative humidity Noncondensing. 0 % to 95 % @ 10 °C to 30 °C; 0 % to 75 % @ 30 °C to 40 °C; 0 % to 40 % @ 40 °C to 55 °C Vibration Random, 2 g, 5-500 Hz per MIL-PRF-28800F, Class 2 instrument Radio frequency communication 2.4 GHz ISM Band Radio frequency certification FCC: T68-FBLE, IC: 6627A-FBLE Enclosure protection IEC 60529: IP40 (non-operating) Safety IEC 61010-1 Pollution Degree 2; IEC 61010-2-033 CAT IV 600 V / CAT III 1000 V Batteries Four AA batteries (NEDA 15A or IEC LR6) Battery life Meter use 1000 hours; Insulation test: at least 1000 tests (1000 V into 1 MΩ, 5 s on / 25 s off duty cycle) Size 5.0 cm H x 10.0 cm W x 20.3 cm L (1.97 in H x 3.94 in W x 8.00 in L) Weight 550 g (1.2 lb) Altitude Operating: 2000 m; Storage: 12,000 m Over-Range capability 110 % of range except for capacitance which is 100 % Frequency overload protection <10⁷ V-Hz Fuse Protection for mA input 0.44 A, 1000 V, IR 10 kA Insulation Specifications Measurement range 1587 FC: 0.01 MΩ to 2 GΩ; 1577: 0.1 MΩ to 600 MΩ Test voltages 1587 FC: 50, 100, 250, 500, 1000 V; 1577: 500, 1000 V Test voltage accuracy +20 %, -0 % Short-Circuit test current 1 mA nominal Auto discharge Discharge time <0.5 second for C = 1 μF or less Live circuit detection Inhibits test if terminal voltage > 30 V prior to initialization of test Maximum capacitive load Operable with up to 1 μF load DC Voltage Measurement Range 6.000 V / 60.00 V / 600.0 V / 1000 V dc Accuracy (1587 FC) ± (0.09 % of Rdg + 2 counts) Accuracy (1577) ± (0.2 % of Rdg + 2 counts) Input Impedance 10 MΩ (nominal), <100 pF Normal mode rejection ratio \>60 dB @ 50 Hz or 60 Hz Common mode rejection ratio \>120 dB @ dc, 50 Hz or 60 Hz (1 kΩ unbalanced) AC Voltage Measurement (True-RMS) Range 600.0 mV / 6.000 V / 60.00 V / 600.0 V / 1000 V Accuracy (1587 FC, 50-60 Hz) ± (1 % + 3) for 600 mV–600 V; ± (2 % + 3) at 1000 V Accuracy (1577, 50-60 Hz) ± (2 % + 3) all ranges Input Impedance 10 MΩ (nominal), <100 pF, ac-coupled DC Millivolts Range / Resolution 600.0 mV dc / 0.1 mV Accuracy (1587 FC) ± (0.1 % + 1) Accuracy (1577) ± (0.2 % + 1) DC and AC Current Measurement Ranges 60 mA, 400 mA (AC 45 Hz to 1000 Hz, and DC) AC Accuracy (1587 FC) ± (1.5 % + 2) AC Accuracy (1577) ± (2 % + 2) DC Accuracy (1587 FC) ± (0.2 % + 2) DC Accuracy (1577) ± (1.0 % + 2) Burden voltage (typical) 2 mV/mA Overload 600 mA for 2 minutes maximum Fuse protection 0.44 mA, 1000 V, IR 10 kA Ohms (Resistance) Ranges 600.0 Ω / 6.000 kΩ / 60.00 kΩ / 600.0 kΩ / 6.000 MΩ / 50.0 MΩ Accuracy 600 Ω – 6 MΩ (1587 FC) ± (0.9 % + 2) Accuracy 600 Ω – 6 MΩ (1577) ± (1.2 % + 2) Accuracy 50 MΩ (1587 FC) ± (1.5 % + 3) Accuracy 50 MΩ (1577) ± (2.0 % + 3) Overload protection 1000 V rms or dc Open circuit test voltage <8.0 V dc Short circuit current <1.1 mA Continuity Test Continuity indication Continuous audible tone for test resistance below 25 Ω and off above 100 Ω. Maximum reading: 1000 Ω Open circuit voltage <8.0 V Short circuit current 1.0 mA typical **Important:** Live circuit detection inhibits insulation testing when terminal voltage exceeds 30 V. Maximum measurement category: CAT III 1000 V / CAT IV 600 V. Maximum voltage applied to any terminal: 1000 V.**Important:** Live circuit detection inhibits the insulation test if terminal voltage greater than 30 V is detected prior to initialization of the test.**Important:** Fluke Connect features (PI/DAR timed ratio tests with TrendIt graphs, memory storage, temperature compensation) are available on the 1587 FC only and require download of the free Fluke Connect app from iTunes or Google Play.**Important:** VFD low-pass filter for accurate motor drive measurements is available on the 1587 FC only.**Important:** Two-year additional warranty offer (extending the standard three-year warranty to five years through product registration within 45 days of purchase) may be discontinued without notice.**Important:** Fluke Connect Assets are sold separately and are required for historical tracking and trending of assets.**Important:** Fluke Connect is not available in all countries. WiFi or cellular service is required to share data; smartphone, wireless service and data plan are not included with purchase.Recommended pairing: the optional Fluke i400 AC Current Clamp extends the meter into clamp-based AC current measurement for motor and drive work, and the TPAK Magnetic Meter Hanger enables hands-free operation in motor terminal boxes and distribution panels — both listed on the datasheet as optional accessories. **Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.** ## Details - **Price:** 1095.3 USD - **Vendor:** Fluke - **Type:** Multimeter - **Tags:** Fluke, Manufacturers, Meters & DAQ, Multimeter, product_manual_group_3, Product_new ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 1095.30 USD | In stock | ## Images - Fluke 1587 FC Insulation Multimeter --- > Source: [ValueTronics](https://valuetronics.com/products/flk-1587fc-tlpv1-new-fluke-2-multi-met-new) > Updated: 2026-05-30