Hioki Super megohm SM7110 - External I;O Specifications

148
Function specications
Resistivity
measurement
function
Operation details
Calculates the surface resistivity and the volume resistivity from the
predetermined electrode constant.
Setting Items
Surface resistivity (Diameter of the main electrode)/
(Internal diameter of the counter
electrode)
Flat sample volume resistivity
(Diameter of the main electrode)/
(Thickness of sample)
Liquid sample volume resistivity
Randomly determined electrode constant
Electrode name specication
Automatically sets the electrode constant
based on the selected electrode.
Setting range
Diameter of the main electrode (D1)
0.0 mm to 100.0 mm, default: 50.0 mm
(in increments of 0.1 mm)
Internal diameter of the counter electrode (D2)
0.0 mm to 100.0 mm, default: 70 mm
(in increments of 0.1 mm)
Thickness of sample (t)
0.0 mm to 100.0 mm, default: 0.1 mm
(in increments of 0.1 mm)
Electrode constant (K)
0.01 to 999.99, default: 500.00
(in increments of 0.1 mm)
Calculation formula
Surface resistivity:
( )
2 1
2 1
D D
s
D D
π
ρ
⋅ +
= ×
−
(Measured value)
Flat sample volume resistivity:
2
1D
v
4t
π
ρ
⋅
=
(Measured value)
10
×
Liquid sample volume resistivity:
l K
ρ
= × (Measured value)
ρs
: Surface resistivity Unit [
Ω
]
ρv, ρl
: Volume resistivity Unit [
Ω
·cm]
π
: Circular constant = 3.14
D1
: Diameter of the main electrode Unit [mm]
D2
: Internal diameter of the counter
electrode
Unit [mm]
t
: Thickness of sample Unit [mm]
K
: Electrode constant Unit [cm]
Comparator function Operation details Compares the set value and measured values, making
judgments.
Setting
ON/OFF
Judgment
Judgments are made based on the value internally
calculated.
Hi (Measured value) > (Upper limit value)
IN (Upper limit value) ≥ (Measured value) ≥ (Lower limit value)
Lo (Lower limit value) > (Measured value)
Judgment sound
setting function
Operation details Beeps based on the comparator judgment results.
(for each of Hi, IN, and Lo).
Operation setting,
tone color
OFF, Type 1, Type 2, Type 3
Number of beeps
1 to 5, Continuous