YSI SonTek ADVField User Manual

SonTek/YSI
ADVField/Hydra Operation Manual (September 1, 2001) 77
Each current meter purchased from SonTek that has the DRUCK sensor installed already has the
appropriate calibration coefficients loaded into the processor. If this information is lost, you can
use the calibration sheet provided by the pressure sensor vendor to construct your own calibration
file. The structure of the
DRUCK calibration file, required by SonTek systems, is as follows.
• Pressure Sensor Serial Number
• Oscillator Frequency (in Hz)
• X
• Y
• Low end of temperature range
• Corresponding voltage of the diode
• Diode sensitivity
• K00 K01 K02 K03
• K10 K11 K12 K13
• K20 K21 K22 K23
• K30 K31 K32 K33
• K40 K41 K42 K43
• K50 K51 K52 K53
Example – Druck calibration file
1145118.drk :
1145118
12.0000000E+06
+8.8880000E+03
+5.5200000E+02
-10
622
-2.21
+1.6214761E+03 -2.0699499E-02 +5.5220000E-05 -5.6160001E-08
+1.8251241E+00 -5.8612000E-06 +3.6197001E-08 -3.8715001E-10
+3.8615943E-04 -1.5274000E-09 -4.7059999E-12 -1.3233001E-13
+7.0553313E-08 -1.9064000E-12 -4.0058001E-14 +9.0119996E-16
+1.7913088E-11 -1.3525000E-15 +1.7647000E-17 +3.8552999E-19
+3.7756621E-15 +1.9573000E-19 +3.6951001E-20 -3.3300999E-22
4.9.4. Paroscientific Digiquartz Ext. Freq. Pressure Sensor (PAROSFREQ)
User requirements for deeper ratings (compared to DRUCK ) and faster response (compared to
PAROS ) convinced SonTek to offer the Paroscientific digiquartz sensor with frequency output
(
PAROSFREQ ). Functionally, the interface for the PAROSFREQ is identical to the interface for the
DRUCK , as both are frequency-based sensors. The PAROSFREQ sensors are available for ADV and
Hydra systems. The differences, when compared with a strain-gage sensor, are:
• The PAROSFREQ is an absolute sensor. It reads 1 dbar in air; a strain gage reports 0 dbars.
• Requires a special interface to sample the frequency signal.
• Requires a special frequency splitter cable.
• Sampling rate is limited to 10 Hz (ADVs and Hydras) because of the time required to sample
the frequency signal with sufficient precision.
• Requires a calibration (specific to each sensor) to be loaded into the processor (system CPU
or a user PC) to obtain valid pressure readings.
• Available in 50-psia ( ≈ 22-m sealed gage) and 100-psia ( ≈ 60-m sealed gage) pressure ratings.
N
ote: The X, Y, and K coefficients can
be found on the Druck calibration sheet.

YSI SonTek ADVField Specifications

General

Brand	YSI
Model	SonTek ADVField
Category	Measuring Instruments
Language	English