Paroscientific "T" Series Pressure Transducer; Input Frequency Gain Codes - Campbell Measurement and Control Module CR10 Operator's Manual
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- Instruction manual (34 pages) ,
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10:
0
04:
P34
01:
1
02:
-24
03:
3
05:
P37
01:
3
02:
-.0698
03:
3
06:
P33
01:
3
02:
2
03:
2
07:
P89
01:
5
02:
1
03:
0
04:
30
08:
P34
01:
2
02:
47.23
03:
4
09:
P30
01:
1
02:
0
03:
5
10:
P95
11:
P35
01:
4
02:
2
03:
6
12:
P
7.17 PAROSCIENTIFIC "T" SERIES
PRESSURE TRANSDUCER
The Paroscientific "T" series transducer has
two resonating quartz crystals that output
frequency signals for temperature and
pressure. The pressure output requires
temperature compensation. Instruction 27
measures the outputs and returns period in
microseconds (refer to Table 7.17-1).
SECTION 7. MEASUREMENT PROGRAMMING EXAMPLES
Offset
Z=X+F
X Loc TEMP
F
Z Loc [:TEMP COMP]
Z=X*F
X Loc TEMP COMP
F
Z Loc [:TEMP COMP]
Z=X+Y
X Loc TEMP COMP
Y Loc PRESSURE
Z Loc [:PRESSURE ]
If X<=>F
X Loc CMPILE CK
=
F
Then Do
Z=X+F
X Loc PRESSURE
F
Z Loc [:OFFSET ]
Z=F
F
Exponent of 10
Z Loc [:CMPILE CK]
End
Z=X-Y
X Loc OFFSET
Y Loc PRESSURE
Z Loc [:DISTANCE ]
End Table 1
TABLE 7.17-1 Period Averaging Inst. 27
PARAM.
DATA
NUMBER
TYPE
01:
2
02:
2
03:
2
04:
4
05:
4
06:
4
07:
FP
08:
FP
GAIN/OUTPUT OPTION, PARAMETER 2
The nominal pressure frequency range is 32 to
42 kHz over the stated pressure range (period
-5
-5
of 3.1*10
to 2.4*10
). The nominal
temperature frequency is 172 kHz, ±50 ppm/°C
-6
(period of 5.8*10
). The gain/output option
(Parameter 2) is based on the maximum input
frequency. For the stated temperature and
pressure frequency ranges, the gain codes are
3 and 4 (refer to Table 7.17-2). Codes 1 and 2
are not used with Paroscientific transducers.
For period, the output option is 0.
TABLE 7.17-2 Input Frequency Gain Codes
Range
Peak to Peak Volts
Code
Required @ Max. Freq.* Frequency
1
2 mV
2
3 mV
3
12 mV
4
2 V
0x
Output period in microseconds
1x
Output frequency in kHz
where x is range code
* AC voltage; must be centered around CR10
ground.
TIME OUT, PARAMETER 5
The "time out", Parameter 5, specifies the
maximum length of time the instruction waits on
each repetition to receive the number of cycles
specified in Parameter 4. The time out units
are 0.01 seconds. The minimum time out is the
time required to receive the specified number of
cycles at the maximum expected frequency.
DESCRIPTION
Repetitions
Gain/output option
Single Ended Input
Channel
# Cycles to measure
Time out (0.01 sec, at
least the maximum
duration of the # of cycles
specified + 1 1/2 cycles.)
Destination input location
Multiplier
Offset
Maximum
8 kHz
20 kHz
50 kHz
200 kHz
7-19
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