Fluke 1577 Insulation Multimeter, 1000 V Tester and DMM

1577 insulation tester and multimeter in one explained

The Fluke 1577 Insulation Multimeter (1577) is a handheld insulation multimeter that combines a digital insulation tester with a true-RMS multimeter. It tests at test voltages up to 1000 V and also measures voltage to 1000 V, current to 400 mA and resistance to 50 MΩ. Seven Star LLC supplies 1577 in Oman and the GCC as an independent supplier in Muscat, not affiliated with the manufacturer.

The 1577 is two tools in one. The table decodes the identifiers.

1577 technical specifications

Data are from the manufacturer product page for the Fluke 1577.

How the Fluke 1577 Insulation Multimeter works

In insulation mode the 1577 applies a selectable DC test voltage and reports resistance in megohms, protected by live-circuit detection that prevents the test above 30 V. In multimeter mode it behaves as a true-RMS meter with DC millivolts, AC/DC voltage, current to 400 mA, resistance and continuity.

Having both functions in one instrument means that a technician can verify a de-energised circuit with the multimeter and then test the insulation without swapping tools. A remote probe, test leads and clips are provided.

Key features

• Live circuit detection
• Remote probe
• Rugged hard case
• Auto power off
• Optional TPAK magnetic hanger

Where 1577 fits and related Fluke models

The 1577 is for technicians who want one instrument. The 1587 FC adds wireless and a 1000 V multimeter with more test functions. For pure insulation testing, the 1503 gives up to 2000 MΩ.

For high-voltage machines use the 1555.

Selection checklist for 1577

Confirm the following points before ordering, so that the instrument matches the work and the safety rules of your site.

• Maximum range 600 MΩ.
• Current limited to 400 mA.
• Hard case included.
• Test voltages up to 1000 V only, so medium-voltage cables need a higher-voltage tester.
• Keep the hard case, remote probe and spare batteries together so the kit is complete for each job.

Safe use, care and maintenance of 1577

• De-energise and isolate the circuit under test, prove it dead with a voltage tester, and discharge it after the test before touching the conductors.
• Test leads are part of the measurement. Inspect them before each campaign, because leakage across damaged leads shows up as a falsely low insulation reading.
• Record the temperature and humidity with each result. Insulation resistance falls as temperature rises, so trend readings only on a comparable basis.
• Replace or recharge the battery according to the manual and check it before a long test campaign, because a high-voltage test draws noticeably more power than a voltage reading.
• Keep the instrument and its accessories clean and dry, and arrange periodic calibration in line with your quality system.
• Use the guard terminal where the instrument provides one, so that surface leakage across terminals or insulators does not distort a high-resistance reading.
• Allow the equipment under test to cool and dry where possible; a motor that has just stopped and is still hot will read lower than the same motor at ambient temperature, which can mislead a trend.

Typical applications of 1577 in Oman and the GCC

Insulation testing is a core predictive-maintenance task. In Oman, high ambient temperature, humidity on the coast and dust accelerate insulation ageing, so motors, cables and switchgear at oil and gas, power and water sites are tested on a schedule.

Electricians and electrical maintenance technicians in Oman use the 1577 for motor and cable checks and general troubleshooting at industrial sites, camps and utilities, where a single case with leads, probe and meter is easy to carry.

1577 compared with nearby models

The 1587 FC is a related insulation multimeter listed separately.

Information to send with an RFQ for 1577

To prepare an accurate quotation, please send:

• Exact model 1577 and the quantity required.
• Test voltages needed and the equipment under test, such as motors, cables or switchgear.
• Accessory needs such as extra leads, guard leads or a remote probe.
• Whether a case, software or reporting tools are required.
• Calibration traceability paperwork if required on delivery.
• Delivery point in Oman or elsewhere in the GCC and the required date.

Storage, handling and spares for the Fluke 1577

Store the Fluke 1577 in its case or holster with the test leads disconnected. Remove the batteries if the meter will not be used for several weeks, because leaking cells can damage the battery contacts. In Oman and the GCC, do not leave the instrument in a parked vehicle during summer, where cabin temperature can go well above the storage limit in the user manual.

• Inspect test leads, probes and clamps before each use and replace any lead with damaged insulation or exposed metal.
• Use only leads and accessories rated for the same or a higher measurement category than the work you do.
• Keep spare fuses of the exact type given in the manual; a wrong fuse removes the protection the meter is built with.
• Plan a regular calibration interval, often twelve months, and keep the certificate with the instrument records.

If your team uses several units of the Fluke 1577, it is useful to order spare test leads and batteries in the same RFQ, so that a meter is not taken out of service for a simple accessory.

Documents and quotation

Send the part number 1577 and we will confirm which manufacturer documents are available for this model.

For a quotation, send the part number 1577, the quantity and your delivery location in Oman or the GCC through the RFQ button on this page. Availability and lead time are confirmed per request.