Testo 770-3 Cable-grab Clamp meter

Testo

£196.00 / £235.20 incl VAT

⚡ Easy to operate thanks to the fully retractable pincer arm
⚡ Auto AC/DC and large two-line display
⚡ Improved TRMS method
⚡ Bluetooth connection to your smartphone (with the testo Smart App)

Only 1 left in stock (can be backordered)

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SKU: TES-770-3 Category: Brand:

Description

Testo 770-3 Cable-grab Clamp meter

Product Description:

  • The three instruments in the testo 770 clamp meter family are ideally suited for current measurement in switching cabinets. One of the two pincer arms can be fully retracted into the instrument. This unique grab mechanism means that cables in tight switching cabinets can be easily grabbed. The automatic measurement parameter detection also ensures reliable work: in the current and voltage area, all three instruments detect direct and alternating current and select other parameters such as resistance, continuity, diode and capacitance automatically.
  • The testo 770-1 model is the standard version for daily measuring tasks, including starting current measurement.
  • The testo 770-2 also has a μA range as well as an integrated temperature adapter for all type K thermocouples.
  • In addition to that, the testo 770-3 includes real-time power measurements (Watts), Power Factor, and Bluetooth. The free Testo Smart App can be used for remote viewing, monitoring, data logging, and creating reports via Bluetooth. The powerful app allows you to create custom reports that include photos, data, and graphs that can be saved or sent via email.

Measure everything and view back professional reports directly on your phone or tablet with the Testo 770-3, the most powerful clamp meter available in the Testo 770 series!

This is the only model in the Testo 770 series which includes Bluetooth wireless connectivity to Testo’s SmartProbes app. With this, you can send measurement results wirelessly from the clamp meter to your smartphone or tablet running the app to view results in real-time at a distance or to create professional reports in the field with a few taps on your touchscreen.

The Testo 770-3 also has improved current measurement range and can test both AC/DC current from 0.1 to 600A. It’s also the only product in the series with the ability to carry out power measurements.

The Testo 770-3 also functions as a true RMS, high accuracy digital multimeter. With this clamp meter, you’ll be able to test voltage, μA current, resistance, frequency, capacitance, temperature, continuity and diode. Thanks to Testo’s unique auto measurement mode, the meter is smart enough to figure out exactly what you’re testing and will adjust itself accordingly so you get the right results.

About the Testo SmartProbe App

With Testo’s Smart Probe app, you can wirelessly connect your Testo 770-3 directly to your phone or tablet via Bluetooth connection.

The benefits of this technology are great; view a graph of your measurement results in real time, create professional reports, send emails to colleagues and much more, all while you’re our testing!

The following video is a basic introduction to the capabilities of Testo Smart technology.

Key Features:

  • Unique hook design separates and grabs wires without using your hands
  • Retractable section of hook for easy connection
  • Automatically identifies testing in progress and selects correct meter configuration
  • Bluetooth connectivity – wirelessly interface with a smartphone or tablet running the Testo Smart Probe app
  • True RMS – accurate even when testing irregular AC waveforms
  • AC/DC voltage measurements from 1mV to 600V
  • AC/DC current measurements from 0.1 to 600A
  • μA measurement range from 0.1 to 400μA (AC/DC
  • Resistance measurements from 0.1Ω to 60MΩ
  • Capacitance measurements from 0.001μF
  • Frequency measurements from 1Hz to 10kHz
  • Temperature testing from -20 to +500°C
  • Power measurement mode
  • Continuity and diode tests
  • CAT IV 600V safety rated
  • In-rush (starting) current capture
  • Automatic power off when left idle
  • MIN/MAX function
  • Data hold function
  • Includes 2 year warranty from Testo

What’s Included?

  • Testo 770-3 Clamp Meter
  • Batteries
  • Test Leads

Technical Data

Temperature – TC Type K (NiCr-Ni)
Measuring range-20 to +500 °C
Accuracy±1 °C (0 to +100 °C)
Resolution0.2 °C
DC voltage
Measuring range1.0 to 600.0 V
Resolutionmax. 1 mV
Accuracy± (0.8 % of mv + 3 Digit)
AC voltage
Measuring range1.0 mV to 600.0 V
Resolutionmax. 1 mV
Accuracy± (1 % of mv + 3 Digit)
DC current
Measuring range0.1 to 600.0 A (clamp)

0.1 to 600.0 μA (measuring cables)

Resolution0.1 (clamp)

0.1 (measuring cables)

Accuracy± (2 % of mv + 5 Digit) (clamp)

± (2 % of mv + 5 Digit) (measuring cables)

AC current
Measuring range0.1 to 600.0 A (clamp)

0.1 to 600.0 μA (measuring cables)

Resolution0.1 A (clamp)

0.1 μA (measuring cables)

Accuracy± (2 % of mv + 5 Digit) (clamp)

± (1.5 % of mv + 5 Digit) (measuring cables)

Resistance
Resolutionmax. 0.01 Ohm
Measuring range0.01 to 60.0 MOhm
Accuracy± (1.5 % of mv + 3 Digit)
Capacitance
Resolutionmax. 0.01 nF
Measuring range2 nF to 60.00 mF
Accuracy± (1.5 % of mv + 5 Digit)
Frequency
Resolutionmax. 0.1 Hz
Measuring range0.01 Hz to 9999 kHz
Accuracy± (1 % of mv + 1 Digit)
Active Power
Measuring range0.1 W to 600 kW
Accuracy± (5 % of mv + 5 Digit)
Resolution0.1 W
Reactive Power
Measuring range0.1 to 600.0 kvar
Accuracy± (10 % of mv + 5 Digit)
Resolution0.1 var
Apparent Power
Measuring range0.1 VA to 600.0 kVA
Accuracy± 1 Digit
Resolution0.1 VA
Direct current DC Voltage
Measuring range0.1 W to 600.0 kW
Accuracy± 1 Digit
Resolutionmax. 0.1 W
Power Factor
Measuring range-1.00 to +1.00
Accuracy± (10 % of mv + 5 Digit)
Resolution0.01
General technical data
Operating humidity0 to 80.0 %RH
Weight378 g
Dimensions249 x 96 x 43 mm
Operating temperature-10 to +50 °C
Connectable probes1 x temperature probe (adapter required for type K thermocouples)
System requirementsrequires iOS 11.0 or newer; requires Android 6.0 or newer; requires mobile end device with Bluetooth 4.0
Product colourBlack
StandardsEN 61326-1; EN 61010-2-032; EN 61140
Battery type3 AAA micro batteries
Display typeLCD (Liquid Crystal Display)
Display size2 lines
Interface2 measuring jacks
Storage temperature-15 to +60 °C
Overvoltage CategoryCAT IV 600V; CAT III 1000V
AuthorizationsCSA; CE
Internal_resistance11 MOhm (AC / DC)
Instrument Measurement Functions
Diode testyes
Continuity testingyes
Display ligthingyes
Holdyes
MinMaxyes
Power Measurementyes
Temperature measurement with adapteryes
True RMSyes
Inrush current measurementyes
Bluetoothyes
Display (counts)6,000
μA current measuring rangeyes
Autom. measurement parameter detectionyes

🚚 Testersmans Shipping Policy

Free Mainland GB Delivery Over £150

We offer free delivery on most mainland Great Britain orders over £150 (ex VAT).
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If your order total falls just short of £150, or you’re a returning customer, feel free to contact us — we may be able to offer a discount code or delivery workaround.
📞 01945 738112 | ✉️ [email protected]


📦 UK Delivery Options

We work with both Royal Mail and DHL to offer reliable and flexible delivery across the UK:

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Our checkout system automatically displays the available delivery services for your postcode and order weight, ensuring you always see the most suitable options.

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Please contact us in advance for a tailored freight quotation if your order falls into this category.


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We aim to dispatch all in-stock orders promptly, but delivery depends on both when you order and which service you select.

  • UK orders: placed by 2:00 PM Monday–Friday are usually dispatched the same day.
  • International orders: placed by 2:00 PM Monday–Thursday are usually dispatched the same day.

Orders placed after these times are processed the next working day. This means delivery may occur the following day or later, depending on the courier and service selected.

Once dispatched, your chosen delivery service determines how quickly your parcel arrives:

  • Standard services We use Royal Mail Tracked 24 or DHL Parcel as our ‘Standard’ services. They are not guaranteed to arrive next working day.
  • Premium services (e.g. Royal Mail Special Delivery or DHL by Noon) offer guaranteed delivery windows.

If your order is time-sensitive, we strongly recommend choosing a guaranteed service or contacting us before ordering to confirm availability.

Please note: For logistical reasons, we may occasionally adjust the delivery method selected at checkout. For example, smaller items may be better suited to letterbox-friendly packaging or may be at greater risk of delay or loss via certain services. We actively monitor courier and postal service disruptions—including strikes and delays—and may modify shipping arrangements to help ensure timely and secure delivery.


📅 Busy Periods & Delays

We always aim to dispatch promptly, but delivery times may be affected by:

  • Seasonal demand (e.g. Christmas, bank holidays, or industry shutdowns)
  • Courier network delays outside our control
  • Supplier lead times or calibration requirements for certain equipment

If your delivery is time-critical, please contact us before ordering so we can confirm stock and courier availability.


🌍 International Shipping

We ship worldwide using UPS Express Saver® and other trusted global courier partners. All international shipments are tracked and generally dispatched Monday to Thursday to ensure smooth customs clearance and transit.

Estimated delivery times:

  • Europe: 1–2 working days
  • North America: 2–3 working days
  • Asia-Pacific & Rest of World: 3–5 working days

Delivery times vary depending on location, customs clearance, and local courier performance.


💰 Taxes, Customs & Import Duties

International customers are responsible for any applicable taxes, customs charges, or import duties.
These are not included in our product or shipping prices.

Your courier will typically provide a secure payment link for any import charges once your parcel reaches customs.
If import fees are refused and the parcel is returned, we will issue a refund minus all incurred shipping and return costs.


📍 Using Your Own Courier

If you would prefer to arrange collection via your own courier (UK or international), please contact us before placing your order to coordinate collection from our Wisbech warehouse.


📝 Important Notes

  • Please ensure your delivery address and contact number are correct at checkout.
  • Undelivered parcels may be returned to us after a short holding period.
  • Redelivery or return fees may apply, even if your order originally qualified for free delivery.
  • By placing an order, you confirm your understanding and acceptance of this policy.