UNI-T UT117C - User Manual

UT117C
P/N:110401111679X
High-Precision True RMS Digital Multimeter
User Manual

Summary

Overview of the UT117 C Multimeter

Product Features and Capabilities

Details the key functionalities and advanced features of the UT117C multimeter.

Multimeter Accessories and Safety

Included Accessories

Lists the standard and optional accessories included with the multimeter.

Critical Safety Precautions

Outlines critical safety precautions and warnings for using the multimeter.

Understanding Electrical Symbols

Explains the various electrical symbols used on the multimeter and in the manual.

General Device Characteristics

Describes the general specifications, performance, and environmental conditions of the device.

External Structure and Controls

External Structure Identification

Identifies and describes the physical components and parts of the multimeter.

Rotary Switch Functions

Explains the function and positions of the multimeter's rotary switch for selecting modes.

Button and Display Functions

Button Descriptions and Operations

Details the function of each button on the multimeter and their operations.

LCD Display Indicators

Provides a breakdown and explanation of the symbols and indicators on the multimeter's LCD screen.

Operating Instructions for Measurements

Automatic AC;DC Voltage (Auto-V LoZ)

Instructions for measuring AC/DC voltage automatically using the Auto-V LoZ function.

AC;DC Voltage Measurement

Steps for measuring AC and DC voltage, including using the LPF function.

AC;DC Millivolt Measurement

How to measure low AC and DC voltages (millivolts) using the multimeter.

Continuity Testing

Procedure for checking electrical continuity in circuits using the multimeter.

Resistance Measurement

Instructions on how to measure electrical resistance accurately with the multimeter.

Diode Testing

Steps for testing diodes to check their functionality using the multimeter.

Capacitance Measurement

Guide on measuring capacitance values of electronic components with the multimeter.

Current Probe Measurements

How to use an external current probe for ACA/DCA measurements with the multimeter.

AC;DC Current Measurement

Instructions for measuring AC and DC current directly using the multimeter's terminals.

Non-contact AC Voltage Detection

How to perform non-contact detection of AC voltage using the NCV function.

Additional Multimeter Functions

Silent Mode Operation

How to enable or disable the audible buzzer for silent operation.

Disabling Auto-Off Backlight

Instructions to disable the automatic backlight turn-off feature.

Disabling Auto-Off Function

How to disable the automatic power-off function of the multimeter.

Awakening from Sleep Mode

Information on how to wake the multimeter from sleep mode.

Audible and Visual Alarms

Details the multimeter's audible and visual alarm system for different measurements.

Technical Specifications Summary

Auto-V LoZ Voltage Specifications

Technical specifications for the Auto-V LoZ voltage measurement function.

DC Voltage Specifications

Technical specifications for DC voltage measurements.

AC Voltage Specifications

Technical specifications for AC voltage measurements, including frequency response.

AC Voltage Low Pass Filter (LPF) Specs

Technical specifications for the Low Pass Filter (LPF) function for AC voltage.

Frequency Measurement Specifications

Technical specifications for frequency measurement functions.

DC Current Specifications

Technical specifications for DC current measurements.

AC Current Specifications

Technical specifications for AC current measurements.

Resistance Measurement Specifications

Technical specifications for resistance measurements.

Capacitance Measurement Specs

Technical specifications for capacitance measurements.

Continuity Test Specifications

Technical specifications for continuity testing.

Diode Test Specifications

Technical specifications for diode testing.

Bluetooth Software for UT117 C

Bluetooth Software Introduction

An introduction to the Bluetooth software and its compatibility.

Downloading the iDMM2.0 App

Instructions on how to download and install the iDMM2.0 mobile application.

Using the iDMM2.0 Software

Guidance on connecting and using the Bluetooth software with the multimeter.

Uninstalling the Software

Steps for uninstalling the mobile application from a device.

Magnetic Hanger Accessory (UT-B23)

Magnetic Hanger Overview

Description of the magnetic hanger and its key features.

Magnetic Hanger Installation

Instructions for installing the magnetic hanger onto the multimeter.

Magnetic Hanger Application

Practical applications and ways to use the magnetic hanger with the multimeter.

Multimeter Maintenance and Repair

General Maintenance Guidelines

Routine maintenance procedures to keep the multimeter in good condition.

Battery and Fuse Replacement

Step-by-step instructions for replacing the battery and fuse.

Overview

1. Function Description
2. Usage Features
3. Maintenance Features

The UNI-T UT117C is a high-precision, true RMS digital multimeter designed for a wide range of electrical measurements and tests. It combines high reliability and safety with advanced features, making it a versatile tool for professionals and enthusiasts alike. The device utilizes a high-resolution A/D converter and microcontroller data processing technology, ensuring accurate and stable readings. Its digital LCD, coupled with overload protection across all ranges, enhances safety and performance. The UT117C is characterized by its intelligent design, high precision, and multifunctionality, offering an ergonomic design for one-handed operation.

Function Description:

The UT117C is capable of measuring or testing a comprehensive set of electrical parameters:

• AC/DC Voltage: It can measure both alternating and direct current voltages, including a dedicated low pass filter (LPF) function for accurate measurement of voltage and frequency in variable speed drive (VSD) systems. The AutoVolt (Auto-V LoZ) feature automatically selects between DC/AC voltage measurement based on detected low impedance, which helps in preventing incorrect readings caused by ghost voltage.
• AC/DC Current: The multimeter supports measurement of both AC and DC currents. It has the ability to measure up to 20A for transient measurements (for 10 seconds).
• Frequency: It can measure the frequency of AC voltage and current signals.
• Resistance: The device measures electrical resistance.
• Continuity: It performs continuity checks, indicating a continuous path with an audible and visual alarm.
• Diode: The multimeter can test diodes, providing the approximate forward voltage of PN junctions.
• Capacitance: It measures capacitance values.
• External Current Probe Measurement: The UT117C can be connected with an external current probe to measure current without breaking the circuit.
• Non-Contact Voltage (NCV) Detection: This feature allows for the detection of AC voltage without physical contact, enhancing safety.

Usage Features:

The UT117C is equipped with several features that enhance its usability and measurement capabilities:

• True RMS Measurement: This ensures accurate readings for non-linearity loads, which are common in modern electrical systems.
• LoZ Function (Low Impedance): This function helps prevent incorrect readings that can occur due to "ghost voltages" by providing a low input impedance.
• Auto Range and Manual Range: The multimeter offers both automatic and manual ranging options. Auto range simplifies operation by automatically selecting the appropriate measurement range, while manual range provides greater control for specific applications.
• Data Hold (HOLD): Users can freeze the displayed measurement value for easier recording or viewing.
• MAX/MIN/Average Measurement: This feature allows the device to record and display the maximum, minimum, and average values of a signal, which is useful for monitoring signal fluctuations over time.
• Relative Measurement (REL): This function subtracts a stored reference value from subsequent measurements, allowing for differential measurements.
• Low Voltage Indication: An icon on the LCD indicates when the battery power is low, prompting the user to replace the batteries to maintain measurement accuracy.
• Audible and Visual Alarm: The device provides both audible beeps and visual light indications for various functions, such as continuity checks, diode tests, NCV detection, and high voltage warnings.
• Backlight: A white backlight illuminates the LCD, enabling users to read displayed data clearly in dark environments. The backlight has an auto-off feature to conserve battery life.
• Auto Power Off: To save battery power, the multimeter automatically turns off after a period of inactivity. This feature can be disabled if continuous operation is required.
• Bluetooth Communication: The UT117C includes Bluetooth functionality, allowing it to connect with the UNI-T smart measurement APP (iDMM2.0) on mobile devices (iOS 10.0+ and Android 5.0+). This enables data recording, report generation, data sharing, and the creation of data diagrams and charts, significantly enhancing data management and analysis. The APP also allows for remote control of certain multimeter functions.
• Optional Magnetic Hanging Strap (UT-B23): This accessory allows the multimeter to be hung on various surfaces like power distribution cabinets, photovoltaic combiner boxes, or engine hoods, enabling hands-free operation and convenient positioning of the meter during measurements.
• Drop Proof: The device is designed to withstand drops from up to 2 meters, indicating its robust construction.
• Safety Standards: It complies with CAT III 600V overvoltage protection, ensuring safe operation in relevant electrical environments.

Maintenance Features:

The UT117C is designed for durability and ease of maintenance, with specific guidelines to ensure its longevity and accurate performance:

• General Cleaning: The multimeter should be cleaned with a wet cloth and a mild cleaning agent. Chemical solvents should be avoided to prevent damage to the product surface.
• Professional Maintenance: As an advanced intelligent precise instrument, maintenance and calibration should be performed by authorized personnel with the necessary skills and knowledge. Unauthorized alteration of internal wiring is strictly prohibited to avoid damage and maintain specifications.
• Battery Replacement: The LCD displays a low battery indicator ("☑") when the battery power is insufficient. Users should replace the three 1.5V AAA batteries promptly to ensure measurement accuracy. The battery cover is secured with a screw, making replacement straightforward.
• Fuse Check and Replacement: If the multimeter fails to function when measuring current, the internal fuse may be blown. Users can check the fuse by setting the rotary switch to the Ω position and short-circuiting the V and A terminals. A reading of approximately 0.0Ω indicates a good fuse. If the fuse is blown, it must be replaced with a new one of the same specification (11A/1000V, 30KA, Φ10.3×38mm). The process involves loosening screws on the rear cover to access and replace the fuse.
• Power Management: It is recommended to turn off the multimeter after use. For long-term storage, the batteries should be removed to prevent leakage and damage.
• Environmental Considerations: The multimeter should not be stored or used in environments with high temperature, high humidity, inflammable/explosive substances, or strong electromagnetic fields, as these conditions can affect its performance and safety.
• Self-Calibration Technology: The device incorporates auto-calibration technology, meaning most internal components are not meant for unauthorized replacement to avoid specification deviation.

The UT117C is a comprehensive and user-friendly digital multimeter that prioritizes safety, accuracy, and convenience through its robust feature set and thoughtful design.

UNI-T UT117C Specifications