Fluke 789/771 GEAR Digital Multimeter, 0.4 V Min, 1000 V Max CAT III, CAT IV

RS stock no.:: 458-154
Mfr. Part No.:: FLUKE-789/771 GEAR
Manufacturer:: Fluke

Fluke 789/771 GEAR Digital Multimeter, 0.4 V Min, 1000 V Max CAT III, CAT IV

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Subtotal (1 unit)*

R 45 258,60

(exc. VAT)

R 52 047,39

(inc. VAT)

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RS stock no.:: 458-154
Mfr. Part No.:: FLUKE-789/771 GEAR
Manufacturer:: Fluke

Specification

Technical data sheets

Legislation and Compliance

Product Details

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	Fluke
	Model Number	789/771 GEAR
	Product Type	Insulation Tester
	Tester Type	Digital Multimeter
	Minimum Test Voltage	0.4V
	Maximum Test Voltage	1000V
	Display Type	Digital
	Test Current	20mA
	Battery Type	Four AA alkaline
	Battery Life	140h
	Power Source	Battery
	Minimum Operating Temperature	-20°C
	Safety Category Voltage	1000, 600V
	Maximum Operating Temperature	55°C
	Safety Category Level	CAT III, CAT IV
	Height	50mm
	Length	203mm
	Standards/Approvals	CAT IV 600 V/CAT III 1000 V, IEC610101, Pollution Degree 2/IEC610102033
	Width	100mm
	Weight	600g

	Select all
	Brand Fluke
	Model Number 789/771 GEAR
	Product Type Insulation Tester
	Tester Type Digital Multimeter
	Minimum Test Voltage 0.4V
	Maximum Test Voltage 1000V
	Display Type Digital
	Test Current 20mA
	Battery Type Four AA alkaline
	Battery Life 140h
	Power Source Battery
	Minimum Operating Temperature -20°C
	Safety Category Voltage 1000, 600V
	Maximum Operating Temperature 55°C
	Safety Category Level CAT III, CAT IV
	Height 50mm
	Length 203mm
	Standards/Approvals CAT IV 600 V/CAT III 1000 V, IEC610101, Pollution Degree 2/IEC610102033
	Width 100mm
	Weight 600g

COO (Country of Origin):: US

Fluke Insulation Tester, 1000V Maximum Test Voltage, 20mA Test Current - FLUKE-789/771 GEAR

This insulation tester is a combined digital multimeter and mA loop calibrator designed for industrial troubleshooting and calibration tasks. It measures voltages, currents, resistance and frequency while also sourcing and simulating mA loops and providing loop power where required, enabling field technicians in automation, electronics and electrical trades to perform single‑tool diagnostics and verification.

Features & Benefits

• 0.05% accuracy on 0–20.000mA supports precise loop calibration
• 24V loop power supply delivers greater than 24V into 250ohm for loop tests
• True‑rms voltage measurement to 1000V for accurate AC readings
• 20mA drive with 24mA over‑range handles high‑test‑current scenarios
• Simultaneous mA and per cent‑of‑scale readout simplifies interpretation
• Four AA alkaline cells provide up to 140h measurement runtime

Applications

• Suitable for commissioning current‑loop transmitters and valves
• Ideal for maintenance checks on industrial control panels
• Used for field calibration of sensors and 4–20mA loops
• Can be used for fault‑finding on motor control and PLC inputs

What environmental range can it operate within for on‑site use?

It functions between −20°C and 55°C and survives storage down to −40°C.

How much continuous current can it measure without overheating?

It measures up to 1.000A with 0.440A continuous capability for extended tasks.

What protections exist for high‑voltage industrial environments?

The instrument is safety rated to CAT III 1000V and CAT IV 600V and meets IEC 61010‑1 and IEC 61010‑2‑033 requirements.

How is battery replacement handled in the field?

The battery compartment is externally accessible for quick swap of the four AA cells.

What measurement modes assist in capturing transient behaviour?

Min/Max/Average/Hold and relative modes are provided along with fast and slow auto‑ramp for output profiling.