Here is a guide of commonly used terms in the electrical safety field and what they mean. If you have questions please contact our applications team  


AC Hipot / DC Hipot / Withstand Test / Dielectric Withstand Test / Dielectric Strength / Flash Test
A test that stresses a products insulation with high voltage in order to ensure it will limit the flow of electric current without breaking down. Measures the effectiveness of an electrical insulation.
Keep your device under test powered ON between Leakage Current of Functional Run test steps.
Ampere (A)
Ampere is the SI base unit of electrical current, often shortened to "amp".
Arc Detection
High frequency filter for arc/corona detection during high voltage testing.
Barcode Capability
On-board barcode scanner connection. Increase efficiency and production throughput by incorporating a barcode scan. A simple scan will associate your DUT with the test sequence and test data.
Built-in AC Power Source
Built-in AC power supply for Leakage Current Testing. (OMNIA II models 8207 & 8257 only).
Built-in Measuring Devices (MDs)
Built-in circuits to simulate human body impedance for Leakage Current Testing.
Cal Alert®
This feature works as a reminder that calibration of the instrument is coming due. It can be programmed with a date to alert the user that calibration of the instrument is approaching.
It checks the test cables are connected properly at the beginning of a test to avoid a false pass.
An electric current is a stream of electrons moving through an electrical conductor or space. It is measured as the net rate of flow of electric charge through a surface.
Data Transfer
Import/Export test files and results from your instrument. Save results data directly to a USB drive from your instrument.
DC Bias
Also known as DC offset. This is the mean amplitude of an output waveform.
Perform a Hipot test and Ground Bond test simultaneously.
Dwell Time
The dwell time is the length of time that voltage or current is applied to test a product.
Electronic Ramping
Raise and lower the test voltage over time by programming ramp up and ramp down times.
The process by which an instrument’s failure detectors are proven to be functioning properly.
Frequency Sweep
Conducted to evaluate the compliance of a system or a device with specified functional requirements.
Functional Run Test
Conducted to evaluate the compliance of a system or a device with specified functional requirements.
GFI Circuit
Ground Fault Interrupt circuit for protecting operators from electric shock.
Ground Bond Test / Earth Bonding / Earth Impedance
A test used to verify that the safety ground circuit of a product has a low enough impedance to handle any fault current to ground. High current flows from the input ground of the product and through the chassis in order to determine if the cabling is capable of handling excessive current flow should a fault occur. Verifies the integrity of a ground connection.
Ground Continuity Test
A test used to determine if the safety ground circuit of a product is continuous and intact. A low voltage is applied from the chassis of the product to the ground pin to determine if the ground circuit is continuous. Verifies the existence of a ground connection.
The I-Max meter displays the maximum leakage current measured during a test.
Impedance / Resistance (Ω)
Effective resistance of an electric circuit or component to alternating current, arising from the combined effects of ohmic resistance and reactance.
Inrush Current
Maximum instantaneous input current drawn by an electrical device when it is powered on.
Insulation Resistance (MΩ or GΩ)
A test that stresses a products insulation with DC high voltage and measures the resistance of the insulation.
Interconnect capability
Link two different instruments to form a test system. For example, Hypot 3800 and HYAMP 3240 for a Ground Bond and Withstand testing system.


Leakage Current (µA or mA)
The current that flows from either AC or DC circuit in equipment to the chassis, or to the ground, and can be either from the input or the output.
Line Leakage Test / Leakage Current Test
A test used to measure undesired leakage current that is flowing through the insulation of a device while it is operating. Performing this test ensures that device leakage is minimal and will not pose a shock hazard.
Low-Current Sense
Ability to sense very small currents during a Hipot test.
Max Resistance
The measure of the opposition to current flow in an electrical circuit. Resistance measurements are normally taken to indicate the condition of a component or a circuit. Resistance equals volts / amps.
Nano-Amp Resolution
Measure leakage current during DCW test down to the nano-amp range.
Ohm (Ω)
The SI unit of electrical resistance, expressing the resistance in a circuit transmitting a current of one ampere when subjected to a potential difference of one volt.
Personal Protective Compatibility
Our testers are configured to work with a variety of PPE accessories.
Personal Protective Equipment (PPE)
Our variety of personal protective equipment accessories will protect workers and keep the workstation safe while meeting all requirements.
PLC Remote Inputs and Outputs
Provides basic PLC functionality for remote control of TEST, RESET, and REMOTE INTERLOCK DISABLE functions, as well as MEMORY SELECTION. Allows for connecting PPE's for a safe workstation setup.
Programmable Memory
Our testers are equipped with onboard memory that can be programmed with test settings. These settings are saved and can be easily retrieved anytime.
Prompt and Hold
Ensure each and every DUT is properly tested with custom pop-up prompts displayed in-between each test step.
Make Hipot type testing more productive by automatically raising or lowering the output voltage between test steps rather than performing multiple tests at different voltages.
The manner in which the voltage increases or decreases linearly with time.
This function is active during the Ramp period only. Ramp-HI will allow current higher than the normal HI-Limit current setting of the DC Withstand Voltage test to avoid false failure due to charging current.
RMS and Peak Readings
Measure RMS or Peak values.
Safety Interlock
All of our instruments are equipped with a Safety Interlock function. The Interlock function utilizes a set of closed contacts to enable the instrument’s output. If the Safety Interlock contacts are open the output of the instrument will be disabled. To disable the Safety Interlock function connect the Interlock Key into the Signal Input port located on the back of the instrument.
Security Access
Memory lock and password access to prevent unauthorized changes to test and system parameters.
Security Feature
All of our testers come standard with a security feature to allow users to be setup with access levels and username/password requirements.
Single Step
A function that allows you to run one test step at a time from a sequence of tests.
Provides maximum operator protection by detecting excessive current leakage in the event a DUT is isolated from ground, instantly saving the test operator should he or she come into contact with high voltage.
Touch Current (µA or mA)
The electric current through a human body or an animal body when it touches one or more accessible parts of an installation or of equipment.
A temporary and unwanted change in the output voltage of a power source. Used in a power source to simulate unwanted power conditions.
Voltage (V)
Voltage is an electromotive force or potential difference expressed in volts. Voltage equals current x resistance.
Voltage Dip
A voltage drop from its normal level to a lower voltage. Often referred to as a "brown out" condition.
Voltage Drop Metering
Displays the voltage drop during a Ground Bond test.
Voltage on the Fly
Easily increase or decrease the voltage output from the front panel while the tester is outputting.
Voltage Surge
A voltage spike from it's normal level to a higher voltage. Simulates an increase in voltage in a power grid.
Voltage Sweep
Output an increasing or decreasing range of voltage values over a period of time.
4-Wire Kelvin Measurement
Eliminate the resistance of the interfacing cables for more accurate measurement during a Ground Bond test.
40A Continuous Current Capability
Apply 40A of continuous current for testing.