Thomas Bergauer
HEPHY Vienna
CMS Week, 25.9.2001, CERN
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Setup
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Results
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Schematic
Devices
Picture
Temp. & Humidity
current
Conclusion
Thomas Bergauer, HEPHY Vienna
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-400V
R
V
SMU
BIAS
Backplane
(1 times)
GND
(10 times)
Thomas Bergauer, HEPHY Vienna
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SMU Keithley 2410
Keithley 2700 Multimeter
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with K7702 40-channel
multiplexer card
TRHX Temperature and
Humidity Readout
Box with 10 resistors
Sensor Box (Strasbourg)
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Apple
Mac
Serial
TRHX
Sensor 1
Sensor 2
GPIB
K2410
HV
K2700
10
R
Box
10
Sensor
Box
Connection to 10 sensors
with wirebonding
Thomas Bergauer, HEPHY Vienna
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Sensor
Box
(filled with
Nitrogen)
Instruments
PowerMac G3
Resistor
Box
Thomas Bergauer, HEPHY Vienna
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Software: Labview
2 sensors f.
temp. & humid.
Alarm if humidity
exceeds limit (30%)
Current compliance
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Hardware: 40 uA (all
sensors)
Software: 20 uA
(each sensor)
Single output file for
each sensor
Thomas Bergauer, HEPHY Vienna
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35
30
25
20
humidity [%]
temperature [C]
15
10
5
0
0
20
40
60
80
100
120
time [h]
4,5 days
Thomas Bergauer, HEPHY Vienna
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0,35
0,3
current [uA]
0,25
W6A-60532-30
W6A-60532-36
0,2
W6A-60532-37
W6B-60533-18
W6B-60533-25
0,15
W6B-60533-26
W6B-60533-27
W6B-60533-28
0,1
0,05
0
0
20
40
60
time [h]
Thomas Bergauer, HEPHY Vienna
80
100
@400V
4 days
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Measured 75 HPK sensors @ 400V
bias
Every sensor had very constant
current for at least 96 hours
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(one sensor has to be verified)
Our setup works very well
HPK sensors have no problem
with longtime behavior!!
Thomas Bergauer, HEPHY Vienna
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