Pressure Sensor Device Byte; Pressure User Calibration Parameters - Omega SP-006 User Manual

6.2.1.3.5
Sensor Type
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09..0x0e
0x0f
6.2.2

Pressure Sensor Device Byte

The Device byte is read-only.
7
0
6.2.3

Pressure User Calibration Parameters

The SP-006 provides four User Calibration registers that allow setting a 2-point calibration/linearization. The
four parameters may only be set while the device is in the User Calibrate mode. When the calibration
function is triggered the device will calculate the Gain and Offset used in the linearization process. The
calibration process is performed by the following steps:
1) Send Sensor Function Calibrate Mode trigger to set the device to calibration mode.
2) Apply a known pressure and record in the User Calibration register 1 (Actual Low).
3) Record the measured value in User Calibration register 0 (Reading Low)
a. A Sensor Capture Low trigger function allows automatic capturing of the value.
4) Apply a 2
5) Record the measured value of the 2
a. A Sensor Capture High trigger function allows automatic capturing of the value.
6) Send the Sensor Function Start Calibrate trigger to generate the Gain and Offset values
The four calibration parameters represent two sets of reading, where X = actual applied pressure and Y
represents the reading captured by the device. After the calibration process:
Where:
Sensor Range / Type
The lower 4-bits of the Range byte are read-only.
Sensor Input Type (Range)
Reserved
Reserved
100 kPa (15 psi)
200 kPa (30 psi)
350 kPa (50 psi)
700 kPa (100 psi)
Reserved
Reserved
+/- 100 kPa (+/- 15 psi)
Reserved
Variable Pressure (special order)
Pressure Sensor Device Byte
6 5
Reserved
0 0
known pressure and record in the User Calibration register 3 (Actual High)
nd
Result = Reading * Gain + Offset
Gain = (Y2 – Y1) / (X2 – X1)
Offset = (X1 * Gain) – Y1
Measurement Type
0x28
0x28
0x28
0x28
0x28
0x28
4 3 2
0 0 0
weight in User Calibration register 2 (Reading High)
nd
Pressure (Kilo Pascal)
Pressure (Kilo Pascal)
Pressure (Kilo Pascal)
Pressure (Kilo Pascal)
Pressure (Kilo Pascal)
Pressure (Kilo Pascal)
1
Type
0x00 Absolute
0x01 Gauge
0x02 Sealed Gauge
0
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