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U1733C LCR Meter PC Comunication

Question asked by Shako on Oct 25, 2011
Latest reply on Nov 12, 2011 by HansDuo

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Hi

I was not sure where to post this query. hope this is the correct place.

I recently got a U1733C LCR Meter.
I am trying to communicate with it.
I was able to get the identification from the device using "*IDN?".

How do i get a reading from the device?
Is there any documentation relating to the commands, like "*IDN?" for this device?

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HansDuo Nov 12, 2011 9:16 AM
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What I discovered so far by sniffing comms from the logging application and a little manual testing :-
*IDN? -> Agilent Technologies,U1733C,MYXXXXXXXX..,00.20
DISP2 D
DISP2 Q
DISP2 TH
FETC? ALL -> Rs,+1.080092E+03,Cs,+7.737580E-04,Rp,+1.080096E+03,Cp,+2.806155E-09,Z,+1.080094E+03,TH,+1.091129E-01,F,+1.000000E+02,D,+5.251048E+02,Q,+1.904382E-03
FETC? ALL -> Rs,+1.084744E+03,Ls,+1.382921E-03,Rp,+1.084745E+03,Lp,+2.155251E+03,Z,+1.084458E+03,TH,+4.215735E-02,F,+1.000000E+02,D,+9.900002E+37,Q,+7.357847E-04
FREQ 100
FREQ 100k
FREQ 10k
FREQ 120
FREQ 1k
FUNC C
FUNC DCR
FUNC ESR
FUNC L
FUNC R
FUNC Z
MODE PAL
MODE SER
RANG xxxxy

You can set frequency, range, function, mode, secondary display.

RANG xxxx can be 2 to 2000 and y can be p, n, m, , k, M
Valid ranges depend on frequency and function.

Setting FUNC selects autorange.

The application seems to only ever read with FETC? ALL but just FETC? also returns
a single value which seems to be the primary display value.

In DCR mode the logger appears to log Z for DCR but Z isn't exactly the displayed
DCR value, it seems the FETC? value is what should be logged. In DCR mode other
values from FETC? ALL seem to be what was there before entering DCR mode.

Responds to STAT? with string like

abcdefghijklmnopqrstu

a =
b = 0/1 for REL mode off/on
c =
d =
e =
f =
g =
h =
i =
j =
k =
l = 0/1 for backlight off/on
m =
n = function E, Z, L, C, R, D, r (r = Ai)
o = frequency 0..4
p = Secondary display D, Q, T,
q =
r =
s =
t =
u =
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U1733C LCR Meter PC Comunication

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