Model 6220/6221 Reference Manual
Delta, Pulse Delta, and Differential Conductance
5-53
Return to
Differential Conductance calculations
dV calculations
While the dV calculations for the first six dV readings are shown in
,
the following formula can be used to calculate any dV reading in the test:
Where: X, Y and Z are the three A/D measurements for a dV reading.
n = Reading Number – 1
Example – Calculate the 21st dV reading:
X, Y and Z are the three A/D measurements for the 21st dV reading.
n = Reading Number – 1
= 21 – 1
= 20
Therefore;
The (-1)
n
term in the dV calculation is used for polarity reversal of every other
calculated dV reading. This makes all calculated dV readings in the test the same
polarity.
Simplified dV calculation
The above dV calculation can be simplified as follows:
dV
X
Y
–
(
)
2
------------------
Z
Y
–
(
)
2
------------------
+
2
--------------------------------------------
1
–
(
)
n
•
=
dV
X
Y
–
(
)
2
------------------
Z
Y
–
(
)
2
------------------
+
2
--------------------------------------------
1
–
(
)
20
•
=
X
Y
–
(
)
2
------------------
Z
Y
–
(
)
2
------------------
+
2
--------------------------------------------
=
dV
X
Y
–
Z
Y
–
+
2
----------------------------------
2
----------------------------------
1
–
(
)
n
•
=
dV
X
2Y
–
Z
+
4
---------------------------
1
–
(
)
n
•
=
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com
Summary of Contents for 6220
Page 16: ...Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com...
Page 24: ...Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com...
Page 453: ...Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com...
