Clamp meter
The testo 770 Clamp Meter is ideal for measuring current strength and uses the magnetic field that surrounds the conductor for its indirect measurement of the magnetic field. It is therefore not necessary to disable the circuit to use the clamp meter, because the measurement is contactless.
The testo Current Meters – for current strength measurement
The advantages of the testo 770 Clamp Meter
Unique hook function separates and grabs wires, without using your hands
Inrush (starting) current capture, APO (Auto Power Off), and Min / Max / Hold
Retractable post makes hook release fast and easy
testo 770 Clamp Meters in comparison
Download
testo 770 Clamp meters in comparison
Advantages at a glance
Full retractable pincer arm
Ideal for wires in tight spaces.
Precise Clamp Meters for various applications
The pincer-like iron core allows targeted splitting of the busbars. This operating method enables you to measure the current even when you cannot switch off the system temporarily. Using a testo Clamp Meter makes it possible to record multiple values at once. These elements allow flexible use and ensure clear data collection.
When using testo Clamp Meters, two important points must be kept in mind:
only one single conductor can be grasped and measured,
if the clamp encloses an entire cable which contains both conductor and return conductor, only the leakage currents are measured.
Additional instrumention from Testo
The testo Current Probe – for even more precision
The Current Meter is an important measuring instrument for precision work in electronics. In contrast to the clamp meter, these diagnostic tools prove to be very sensitive, which means you can also measure extremely small currents with them.
High-quality, precise leakage current probes have additional functions, which for instance also test the starting current and measurement data in the μA range. Find a testo Digital Clamp Meter that suits all your requirements:
continuity and resistance testing,
voltage measurement,
RMS current measurement.
High-precision clamp meters from Testo – for greater safety
Testo's Clamp Meters stand out with an innovative grab hook which is easy to operate. This allows you to grasp the individual wires properly. This means it ensures reliable, contactless measurement of the values. Even when wires are tightly packed , you can be sure the Clamp Meter and Current Probe will work reliably. The testo Clamp Meter has a two-line display which is easy to read out and auto-selects current. You have the choice between the following models:
testo 770-1 with a fully retractable pincer arm for a high level of flexibility,
testo 770-2 with additional temperature adapter and measuring values in the μA range,
testo 770-3 with optimized TRMS method and Bluetooth connection.
For the recording of static magnetic fields
In order to be able to measure direct current, the clamp meter performs a resistance measurement that is dependent on the magnetic field. This enables static magnetic fields to be recorded, which is necessary because there are no alternating fields present with direct current. The magneto-resistive resistances which are required for this are fitted in a gap. Their really weak signal needs to be strengthened electronically, so the measuring instruments are equipped with an appropriate energy storage device and function via electric power or a battery. The testo Clamp Meters are also suitable for alternating current.
In addition to testing direct current and alternating current in amperes, the latest measuring instruments provide even more values in other applications, for example direct current and alternating current (DC and AC) in volts. There are endless possibilities:
Measurement of resistance (in ohms),
Testing capacitance (in farads),
Measurement of frequency (in hertz).
Testo Clamp Meters – suitable for maintenance and inspection of electrical systems and small devices. However, using a current probe enables checking of the direct current, but also of the capacitance or resistance. The instrument is important for continuity testing as well. If the objects being tested are difficult to access, the data hold function helps you by making it easier to read out the values.
The movable pincer arm also makes the Testo Current Meter easy to handle in a difficult environment. Even when power cables are tightly packed in a switching cabinet, it is possible to work safely and reliably. You can easily read off the measuring values on the large display and initiate any steps that may be necessary in terms of insulation or system maintenance.
One App for all applications.
The testo Smart App guides you quickly and easily through measurements on refrigeration, air conditioning and heating systems
Now new:
PRO measuring programs for increasing the efficiency of your applications
Multifunctional
Compatible with all Bluetooth-enabled Testo measuring instruments
Efficient
Direct report dispatch by e-mail
Fast
All measurement values at a glance
Easy
Intuitive measurement menus
Clever
Free download, free use
NEW
PRO Measuring Programs