This tester is used to perform earth continuity tests
required for class-I devices for various safety standards,
including the IEC, EN, VDE, BS, JIS, UL, and the Electrical
Appliance and Material Control Law of Japan.
The tester must be used under the following conditions:
Test current value: 3A to 30 A AC Output terminal voltage:
5.4 V or less Resistance value: 1.2 Ω or less Maximum power:
150 VA or less
1. Making test current constant
The test current for earth continuity tests has been made
constant. This relieves the operator of the burdensome
procedure of resetting the test current when the resistance
of the DUT (Device Under Test) changes.
2. Safety output voltage
The constant current/constant voltage circuit provides fast
response, preventing generation of excessive output voltage
even when output is interrupted during testing. The tester
complies with the limitations on no-load output voltages (6
V or less, 12 V or less, and so on) required by many safety
4. Compact and lightweight
A new high-efficiency power supply (achieving a power
conversion efficiency of 65%) and large output (150 VA)
makes possible a tester that is remarkably compact and
lightweight, about half the size and weight of our
5. Excellent measurement accuracy
The tester is equipped with an ammeter of +/-(1 % of reading
+ 0,2 A), a voltmeter of +/“(1 % of reading + 0.02V), and an
ohmmeter of +/-(2% of reading + 0.003 Ω) that calculates
resistance values based on measured current and voltage.
6. Offset canceling function
The tester has an offset canceling function that cancels
values for contact resistance at alligator-clip connections
or other connecting points, resistance components, and the
contact resistance of measuring leads in measurements using
7. Contact check function
The tester is provided with a contact check function that
verifies the connection of the DUT (by current detection)
before initiating testing.
8. Simple operations
Tester functions are fast and easily controlled, with an
intuitive control method that's easy to pick up, even for
For example, test conditions are set simply by selecting an
item displayed on the LCD with the cursor keys and turning
the rotary knob to set/select a value.
Function keys allow you to set shortcuts to a desired
9. Stores up to 100 types of test conditions
The tester allows you to store and name up to 100 test
conditions involving parameters such as test current,
determined resistance value, and test time. For example, you
can store test conditions for a specific safety standard
under the name of the standard, or store test conditions
under the name of the destination of the DUT.
When test conditions need to be modified due to changes in
the destination of the product or revised safety standards,
you can recall a set of test conditions simply by entering a
memory number, making necessary modifications to the
Assigning specific names allows test conditions to called up
by name. This function is available through both the front
panel and the remote control.
10. Programming of test conditions
A combination of stored test conditions allows automatic
execution of tests consisting of several programs of up to
100 steps each.
Although the total number of steps is limited to 500, 100
types of programs can be stored and recalled from the front
panel or the remote control.