Hioki Super megohm SM7110 - Contact Check (Executing Contact Check, Setting Reference Value)

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Contact Check (Executing Contact Check, Setting Reference Value)
4.12 Contact Check (Executing Contact Check, Setting
Reference Value)
Be sure to read “Before performing a measurement” (p. 12) beforehand.
The contact check can be performed with the cable connected to the object to be measured.
The instrument judges the contact check result to be pass or fail by detecting a di󰀨erence of the
capacitance between that obtained when the cable is open and that obtained during the contact
check.
Judgment if the contact check function is set to ON
If the contact check function setting set to [ON], the indicator [C.CHK] is displayed on the
measurement screen.
Pressing the F2 key [C.CHK] on the measurement screen or the F2 key [EXEC] on the contact
check setting screen executes the contact check once.
The contact check also starts at the start of measurement.
The contact check measures a capacitance by applying a high-frequency signal and determines the
connection condition based on a di󰀨erence between the measured capacitance and that measured
with the terminals open.
Resistance value measurement mode
(initial screen)
If the contact check function is [ON], always execute the xture capacitance open correction before
measurement.
If using an external power supply, set the applied voltage source to [EXTERNAL].
See “3.2 Setting Applied Measurement Voltage” (p. 41).
If the capacitance value of the measurement system is less than the contact check reference value
(contact error), [C.CHK] highlighted in reverse video (no object is connected to the instrument). In
this case, inspect the instrument and the measurement xture.
Measurement is completed and data is output normally even if a contact error occurs.
The instrument uses the system of detecting electrostatic capacitance. Hence it cannot be used for
purely resistive objects that have less low capacitance components.
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Applied Measurement