Testo 770-1 Clamp Meter, Max Current 400A ac CAT III 1000V With RS Calibration

Name: Testo 770-1 Clamp Meter, Max Current 400A ac CAT III 1000V With RS Calibration
Brand: Testo
SKU: 905-6910
Price: 202.98 GBP
Availability: InStock

RS Stock No.:: 905-6910
Mfr. Part No.:: 0590 7701
Brand:: Testo

Testo 770-1 Clamp Meter, Max Current 400A ac CAT III 1000V With RS Calibration

View all Clamp Meters

Subtotal (1 unit)*

£169.15

(exc. VAT)

£202.98

(inc. VAT)

FREE delivery for orders over £50.00

In Stock

6 unit(s) ready to ship
Plus 5 unit(s) shipping from 21 October 2025

Need more? Click ‘Check delivery dates’ to find extra stock and lead times.

Units	Per unit
1 +	£169.15

*price indicative

RS Stock No.:: 905-6910
Mfr. Part No.:: 0590 7701
Brand:: Testo

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	Testo
	Absolute Maximum AC Current Measurement	400A ac
	Absolute Maximum AC Voltage Measurement	600V ac
	Absolute Maximum Resistance Measurement	40MΩ
	Model Number	770-1
	Calibrated	RSCAL
	AC Current Measurement Resolution	100mA
	DC Current Measurement Resolution	100mA
	Best DC Current Accuracy	±(2% rdg + 5dgts)
	Clamp Meter Type	AC/DC Clamp Meter
	Best AC Current Accuracy	±(2% rdg + 5dgts)
	Best AC Voltage Accuracy	±(1% rdg + 3dgts)
	Functions Measured	AC Current, AC Voltage, Capacitance, DC Current, DC Voltage, Frequency, Resistance
	Best DC Voltage Accuracy	±(0.8% rdg + 3dgts)
	True RMS	Yes
	DC Voltage Measurement Resolution	1mV
	Minimum Operating Temperature	-10°C
	AC Voltage Measurement Resolution	1mV
	AC Current Measurement Range	0.1 → 400 A
	AC Voltage Measurement Range	0.001 → 600 V
	Weight	302g
	Safety Category Level	CAT III, CAT IV
	Height	43mm
	Dimensions	243 x 96 x 43mm
	Safety Category Voltage	600 V, 1000V
	Maximum Operating Temperature	+50°C
	Display Type	LCD
	Safety Category	CAT III 1000 V, CAT IV 600V
	Battery Type	AAA
	Power Source	Battery
	Width	96mm
	Length	243mm
	Resistance Measurement Resolution	100mΩ
	DC Current Measurement Range	0.1 → 400 A

	Select all
	Brand Testo
	Absolute Maximum AC Current Measurement 400A ac
	Absolute Maximum AC Voltage Measurement 600V ac
	Absolute Maximum Resistance Measurement 40MΩ
	Model Number 770-1
	Calibrated RSCAL
	AC Current Measurement Resolution 100mA
	DC Current Measurement Resolution 100mA
	Best DC Current Accuracy ±(2% rdg + 5dgts)
	Clamp Meter Type AC/DC Clamp Meter
	Best AC Current Accuracy ±(2% rdg + 5dgts)
	Best AC Voltage Accuracy ±(1% rdg + 3dgts)
	Functions Measured AC Current, AC Voltage, Capacitance, DC Current, DC Voltage, Frequency, Resistance
	Best DC Voltage Accuracy ±(0.8% rdg + 3dgts)
	True RMS Yes
	DC Voltage Measurement Resolution 1mV
	Minimum Operating Temperature -10°C
	AC Voltage Measurement Resolution 1mV
	AC Current Measurement Range 0.1 → 400 A
	AC Voltage Measurement Range 0.001 → 600 V
	Weight 302g
	Safety Category Level CAT III, CAT IV
	Height 43mm
	Dimensions 243 x 96 x 43mm
	Safety Category Voltage 600 V, 1000V
	Maximum Operating Temperature +50°C
	Display Type LCD
	Safety Category CAT III 1000 V, CAT IV 600V
	Battery Type AAA
	Power Source Battery
	Width 96mm
	Length 243mm
	Resistance Measurement Resolution 100mΩ
	DC Current Measurement Range 0.1 → 400 A

Testo 770-1 Clampmeter

Testo 770-1 is suited for current measurement in switching cabinets. One of the two pincer arms can be fully retracted into the instrument. This unique mechanism means that cables in tight switching cabinets can be easily grabbed. The automatic measurement parameter detection also enables reliable work. Testo 770-1 detect direct and alternating current and select other parameters such as resistance, continuity, diode and capacitance automatically.

Innovative clamp mechanism for easy operation in narrow spaces
Extra functions such as inrush, power and μA measurement
Auto ac/dc
True RMS
Voltage measuring range: 1 mV to 600 V ac/dc
Current measuring range: 0.1 A to 400 A ac/dc
Display (counts): 4000

Benefits

No more problems grabbing cables in confined spaces
Grab cables with the clamp instead of touching them
Clear visible measurement results

Standards

EN 61326-1, EN 61140

Approvals

TÜV, CSA, CE

Supplied with

Testo 770-1 TRMS clamp meter, batteries and 1 set of measuring cables.

Testo AC/DC Clamp Meter, 400A AC/DC, 600V AC/DC - 770 Series - 0590 7701

Measure current and voltage in switching cabinets with this high-performance clamp meter from Testo. It has an automatic parameter detection feature that makes it easy to measure values without the need to change the meter settings. Thanks to its two pincer arms, one of which can be fully retracted into the instrument, you can easily grab cables in tight spaces. The meter has a liquid-crystal display (LCD) screen for measurement results that are easy to read.

Features & Benefits

• Light weight of 302g for ease of handling
• Battery-powered for portable use without the need for an external power supply
• Wide operating temperature range of -10°C to +50°C for use in demanding conditions
• Wide current measuring range of 0.1A to 400A for use in a variety of applications

Applications

• Distribution boards
• Machine power panels

What's the difference between a clamp meter and a multimeter?

The major difference between a clamp meter and a multimeter is that a clamp meter can measure high currents, while a multimeter is more suitable for smaller, more precise measurements.