Associated Research HYPOTULTRA III 7620, Руководство по эксплуатации и обслуживанию

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4.3.5. Continuity, Model 7620 and 7650
Continuity test is generally used to test the ground conductor of a line cord. If the resistance
exceeds Max-Lmt trip point or drops below the Min-Lmt trip point the HypotULTRA III will
signal a continuity failure. If you are testing products with two prong plugs, do not activate the
continuity circuit.
From the Test Parameter-review screen, scroll the highlighted area to the Test Type and press
the “Edit” soft key.
The Test Parameter edit screen will now be displayed. Now press the “Change” soft key until
the letters CONT appear in the parameter field. Press the ENTER key to select the CONT test.
The CONT parameter-review screen will appear as follows:
T e s t T y p e C O N T S c a n n e r H L H L H L H L
M a x L m t x x . x x E x S c a n H L L L H L L H
^
M i n L m t x x . x x P r o m p t x x x x x x x
D w e l l 9 9 9 . 9 s
v
O f f s e t x . x x
C o n n e c t O N
< >
E d i t
The Scanner selections will only appear if there is a scanner installed or an external scanner
connected to the instrument. This is an auto detect feature in hardware.
From the Continuity parameter setting screen, the following parameters may be controlled:
Max-Lmt, Min-Lmt, Dwell, Offset, Connect, Scanner Channel Output Select if installed, and
Prompt.
Offset
This function allows the instrument to compensate for lead and test fixture resistance during a
continuity test. Using the up and down arrow keys or the ENTER key, scroll the highlighted
area to the Offset parameter. You may now manually or automatically set the Offset value.
To manually set an Offset value enter a milliohm value via the numeric keypad and then press
the ENTER key to accept the new value or press the EXIT key to escape from the edit.
To automatically set an Offset value, set the output voltage, current, and frequency to the values
that will be used on the DUT and connect the test cables, test fixture, or scanner channel with
fixturing to the instrument. Next, short the ends of the test cables and press the “TEST” button.
The instrument will beep and the new value will automatically be updated in the field and does
not allow an escape to the original value or require that the ENTER key be used to accept the
new parameter.