28 vibrating wire measurement, 29 inw ps9105e, 100 sdm tdr – Campbell Scientific CR23X Micrologger User Manual
Page 153
SECTION 9. INPUT/OUTPUT INSTRUCTIONS
9-19
04:
4
# Cycles to measure
05:
4
Time out (0.01 sec, at
least the maximum
duration of the number
of cycles specified + 1
1/2 cycles.)
06:
4
Destination input
location
07:
FP
Multiplier
08:
FP
Offset
Input locations altered: 1 per repetition
*** 28 VIBRATING WIRE ***
MEASUREMENT
FUNCTION
Excites a vibrating wire sensor with a swept
frequency (from low frequency to high), then
measures the response period and calculates 1/T
2
,
where T is the period in ms. Excitation is normally
provided before each repetition. As an option, a
single excitation can be made prior to all repetitions
of the measurement. An AVW1 or AVW4 Vibrating
Wire Interface is usually required for these sensors.
PARAM.
DATA
NUMBER
TYPE
DESCRIPTION
01:
2
Repetitions Hit C (--) to
skip repeat of
excitation
02:
2
Single-ended channel
for first measurement
03:
2
Excitation Channel
04:
2
Start frequency of
sweep (100'S of Hz)
05:
2
End frequency of
sweep (100'S of Hz)
06:
4
# Cycles to measure (0
means none)
07:
4
Delay before excitation
applied (0.01 sec units)
08:
4
Input location (1/T
2
), T
in ms
09:
FP
Multiplier
10:
FP
Offset
Input locations altered: 1 per repetition
*** 29 INW PS9105E ***
FUNCTION
The Instrumentation Northwest PS9105
Pressure Transducer is used to measure water
level. This instruction excites the PS9105 with
a single excitation channel and measures the
sensor’s output on two consecutive differential
analog input channels. The pressure and
sensor temperature are written into two
consecutive input locations starting at the
location specified in parameter 3.
Each PS9105 has 20 enhanced measurement
parameters that are documented on the
calibration sheet. Enter these parameters into
Instruction 29.
PARAM.
DATA
NUMBER
TYPE
DESCRIPTION
01:
2
Differential channel
number for first
measurement
02:
2
Excitation channel
number
03:
4
Input location number
04:
FP
Pressure Range (psig)
(enh. par. 1)
05:
FP
Enhanced Parameter 2
06:
FP
Enhanced Parameter 3
07:
FP
Enhanced Parameter 4
08:
FP
Enhanced Parameter 5
09:
FP
Enhanced Parameter 6
10:
FP
Enhanced Parameter 7
11:
FP
Enhanced Parameter 8
12:
FP
Enhanced Parameter 9
13:
FP
Enhanced Parameter 10
14:
FP
Enhanced Parameter 11
15:
FP
Enhanced Parameter 12
16:
FP
Enhanced Parameter 13
17:
FP
Enhanced Parameter 14
18:
FP
Enhanced Parameter 15
19:
FP
Enhanced Parameter 16
20:
FP
Enhanced Parameter 17
21:
FP
Enhanced Parameter 18
22:
FP
Enhanced Parameter 19
23:
FP
Enhanced Parameter 20
Input location altered: 2
*** 100 SDM TDR ***
FUNCTION
Instruction 100 is used to control and measure
the CSI TDR Soil Moisture Measurement
System with control ports C1, C2, and C3. See
the TDR manual for information on Instruction
100.