The electrical node where
all
four shields are connected together is
"Guard".
a) shields connected together at DUT = guard b) currents flowing on Hc & Lc shields c) With proper connections the measurement range is from 1 milliohm to 10 Megohm (or better). d) WRONG connection, like Kelvin Clips below. |
4-Terminal Pair LCR Meter
Functional diagram from The Impedance Measurement
Handbook.
![]() |
HP
16047C
LCR Test Fixture![]() |
This
fixture
has an advantage over the 16047D when the leads are either
very small
in diameter (i.e. arn't stiff enough to push into the
spring loaded
sockets) or when they are very long. The bottom of
the 16047C
looks like the top, i.e. it's open so you can have test
leads sticking
out the bottom. |
HP
16047D
Test Fixture![]() |
This is
the
test fixture that shipped with all the HP LCR
meters. I'm looking
for one and both the axial and radial inserts as well as
the notched
metal plate for doing the zero cal. Let
me
know if you have one to sell. |
Reproduction
HP
16034E SMD Test Fixture Labeled TH26008A ![]() |
|
4-Terminal
Pair
Tweezers![]() |
|
Kelvin
Clips![]() |
These test leads will NOT work correctly because they don't tie the Hc and Lc shields toghther, see fig 3-5d above. |
Home
Brew
Test Leads![]() |
I will modify this cable to
add
another lead connected to the shield common point, i.e.
guard.
Then make up a demonstration of guarding. |
# of 22
uF Caps in Parallel |
Meas by itself |
|
C1 |
1 |
21.75
uF |
C2 |
2 |
42.03
uF |
C3 |
3 |
63.3 uF |
Model |
Description |
Remote |
4260A |
Universal
Bridge |
na |
4261A |
LCR
Meter |
BCD not HP-IB |
4262A |
LCR
Meter |
BCD or HP-IB |
4265B |
Universal
Bridge
(GR, Boonton?) |
na |
4271B |
1 MHz
LCR
Meter |
HP-IB |
4272A |
1 MHz
Preset
C Meter |
BCD |
4273A |
1 kHz Preset C Meter | BCD |
4274A |
Multi-frequency
LCR
Meter
($7930) |
HP-IB |
4275A |
Multi-frequency
LCR
Meter
($8720) |
HP-IB |
4282A |
Digital
High
Cap Meter |
HP-IB |
4328A |
Milliohm
Meter |
na |
4329A |
High
Resistance Meter |
na |
4332A |
LCR
Meter |
na |
4342A |
Q Meter |
na |
4191A |
RF Impedance Analyzer (new 1980) | HP-IB |
4140A |
pA
Meter/DC
Voltage Source (new 1980) Semi: I-V and Quasi-static C-V |
HP-IB |
4800A |
Vector/Z/Meter |
na |
4815A |
RF Vector/Z/Meter | na |
5045A |
Digital
IC
Tester |
HP-IB |
[an error occurred while processing this directive] page created 8 Oct. 2010.