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Loggers with BPR channels interface a Paroscientific, Inc. transducer. The logger measure precisely the output frequencies from the transducer. Those transducers generally outputs two signals, one for pressure and one for temperature.

There are two channels for the periods measured (peri_00 and peri_01). But in order to convert them in a meaningful pressure and temperature, the logger provides two channels which implement the calibration equation from Paroscientific, Inc. They rely on two type of equations: deri_bprpres (pressure in dbar) and deri_bprtemp (temperature in °C).

deri_bprpres equation

The coefficients x0 ... x10 are provided by Paroscientic, Inc. and are mapped according to the following bijection:

Paroscientific Inc. coefficient	U0	C1	C2	C3	D1	D2	T1	T2	T3	T4	T5
deri_bprpres coefficient	x0	x1	x2	x3	x4	x5	x6	x7	x8	x9	x10

n0 is the index of the pressure period channel, in this example 1
value(n0) is the final output value of the pressure period channel in picoseconds.
n1 is the index of the temperature period channel, in this example 2
value(n1) is the final output value of the temperature period channel in picoseconds.

deri_bprtemp equation

The coefficients x0 ... x3 are provided by Paroscientic, Inc. and are mapped according to the following bijection:

Paroscientific Inc. coefficient	U0	Y1	Y2	Y3
deri_bprtemp coefficient	x0	x1	x2	x3

n0 is the index of the temperature period channel, in this example 2
value(n0) is the final output value of the temperature period channel in picoseconds.

>> calibration 3 type
<< calibration 3 type = bpr_08

>> calibration 4 type
<< calibration 4 type = bpr_09

Confirm the channel type.

>> calibration 3 datetime= 20171123120721, x0 = 5.8310298E+00, x1 = -24.514029E+03, x2 = -573.64117E+00, x3 = 76.129281E+03, x4 = 35.688001E-03, x5 = 0.0000000E+00, x6 = 30.413169E+00, x7 = 664.14898E-03

<< calibration 3 datetime = 20171123120721, x0 = 5.8310300e+000, x1 = -24.514030e+003, x2 = -573.64115e+000, x3 = 76.129280e+003, x4 = 35.688000e-003, x5 = 0.0000000e+000, x6 = 30.413170e+000, x7 = 664.14899e-003
>> calibration 3 datetime = 20171123120721, x8 = 58.803409E+00, x9 = 180.91160E+00, x10 = 0.0000000E+00
<< calibration 3 datetime = 20171123120721, x8 = 58.803408e+000, x9 = 180.91160e+000, x10 = 0.0000000e+000

Set the pressure coefficients provided by Paroscientific, Inc.

>> calibration 4 datetime = 20171123120722, x0 = 5.8310298E+00, x1 = -3.8981210E+03, x2 = -10.493120E+03, x3 = 0.0000000E+00
<< calibration 4 datetime = 20171123120722, x0 = 5.8310300e+000, x1 = -3.8981210e+003, x2 = -10.493120e+003, x3 = 0.0000000e+000

Set the temperature coefficients provided by Paroscientific, Inc.

>> calibration 3
<< calibration 3 type = bpr_08, datetime = 20171123120721, x0 = 5.8310300e+000, x1 = -24.514030e+003, x2 = -573.64115e+000, x3 = 76.129280e+003, x4 = 35.688000e-003, x5 = 0.0000000e+000, x6 = 30.413170e+000, x7 = 664.14899e-003, x8 = 58.803408e+000, x9 = 180.91160e+000, x10 = 0.0000000e+000, n0 = 1, n1 = 2

>> calibration 4
<< calibration 4 type = bpr_09, datetime = 20171123120722, x0 = 5.8310300e+000, x1 = -3.8981210e+003, x2 = -10.493120e+003, x3 = 0.0000000e+000, n0 = 2

Request confirmation of all pressure and temperature calibration coefficients.