Digital clamp meter UNI-T UT203 is a reliable and low consumption clamp multimeter. Digital clamp meter UNI-T UT203 measures AC/DC voltage and current, resistance, frequency, duty cycle, also capable of performing the diode test and the continuity test functions. This clamp meter has overload protection.

Today we are going to review Uni-T UT 203 digital clamp meter. The clamp meter comes in the bag like this, with the carrying strap. There are the clamp meter, the strap, the testing probes and the user manual in the bag. Using Uni-T UT 203 you can measure direct and alternating current, voltage, resistance, frequency, direct and alternating current intensity of up to 400 Amperes. Also, there are continuity test and diode test functions.
Let's take a closer look at the meter. The device is quite compact. The maximum diameter of the conductor is 26 millimeters. The device has high-quality plastic casing.
The front panel holds the basic controls, the display and the terminals for connecting testing probes. The bottom side has the eye lug for a strap.
The rear panel has the battery compartment. The power is supplied by a nine-volt battery.
Let's briefly speak about the functions.
The device is turned on by the rotary switch. Using the "SELECT" button the device is set to the measurement mode, where you can choose the measurement of direct current and alternating current.
Using the "REL" button, you can manually toggle the measurement range, because switching the range is done automatically.
The same range switching procedure was provided for the resistance measurement mode.
In the continuity test and the diode test modes you can toggle between these functions using the "SELECT" button.
In the frequency and the duty cycle modes you can toggle between these functions using the "REL" button.
The current measurement mode. There are two measurement ranges available – 40 amperes and 400 Amperes both to be selected manually. The "SELECT" button allows to choose the type of electrical current.
The "REL" button corresponds to the relative measurement mode. This function is vitally necessary for the direct current measurement.
Also there is "HOLD" button for fixing the measurement results.
Now we will demonstrate the measurement of an alternating current in a three-phase power line. Turning the rotary switch to the electrical current measurement mode. Selecting the alternating current measurement option. Crimping the "A" phase – 47 Amperes. I'm pressing the "HOLD" button and recording the result. Clicking the "HOLD" button again. Crimping the second conductor and getting 27 Amperes. Moving on to the third conductor – 46 Amperes. For example, you can conduct the measurement at the 40 Amperes range. Switching to the alternating current. Then you will be getting the beeper sound like that and the display will show the "OL" message – the range surpass.
Now, let's measure a linear and a phase voltage. Connecting the probes. Setting the device to the voltage measurement mode, turning on the alternating current. Firstly, the linear voltage is 403 Volts. The phase is 236 Volts.
UNI-T UT 203 is a perfect choice for amateurs and professionals, due to the low price, plenty of functions and good manufacturing quality

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