Kikusui TOS6200A, Руководство пользователя

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TOS6200A/6210 Installation and Preparation for Use 2-9
2.4.4 Measurements Using Four Terminals
Four-terminal measurements allow the tester to measure the resistance of the DUT,
excluding the minute resistance of the leads, contact resistance of the OUTPUT ter-
minals, and other non-essential characteristics.
Fig. 2-3 Four-Terminal Connection
2.4.5 Measurements Using Two Terminals
Perform two-terminal measurements if four-terminal measurements can't be made.
Note that measurements using two terminals will include the resistance components
of the leads and the contact resistance of the OUTPUT terminals.
Fig. 2-4 Two-Terminal Connection
Two-terminal measurements can be performed with the resistance components (R1,
R2) of the leads and the contact resistances (r1 to r4) of the OUTPUT terminals sub-
tracted beforehand. For more information, see 4.2.6, "Offset Canceling Function.”
OUTPUT
LOW HIGH
LOW HIGH
SAMPLING
r1
r3
r5 r6
r7 r8
r4
r2
R2
R3 R4
DUT: Device Under Test
r1 to r8: Contact resistance
R1 to R4: Resistance of the leads
A B
R1
Remove the short-circuit bars connecting the OUT-
PUT and SAMPLING terminals and connect the
leads.
Sampling the voltage between A and B allows the
tester to measure the resistance between A and B
without interference from the effects of contact resis-
tance r1 to r8 and resistance components R1 to R4 of
the leads.
SAMPLING
OUTPUT
LOW HIGH
LOW HIGH
r1
r3 r4
r2
R1 R2
A B
DUT: Device Under Test
r1 to r4: Contact resistance
R1 to R2: Resistance of the leads
Install the short-circuit bars between the OUTPUT
and SAMPLING terminals and connect the leads.
The tester measures the total resistance value of con-
tact resistance r1 to r4, resistance components R1
and R2 of the leads, and the resistance between A
and B.