Datasheet

Calibration
0x0A – 0x0D Calibration registers
Signed long
0x0A = MSB
0x0D = LSB
Units = µS
Calibration values can be whole number, or floating point.
*Calibration values are in microsiemens only.
After sending a value to this register block, calibration is not
complete. The calibration request register must be set after loading
a calibration value into this register block.
Example
Calibrating to a 150,000µs solution.
calibration value = 150,000µS
150,000.00 x 100 = 15,000,000
15,000,000 to HEX = 0x00E4E1C0
calibration MSB Register = 0x00
calibration high byte Register = 0xE4
calibration low byte Register = 0xE1
calibration LSB Register = 0xC0
To send a new calibration value to the EC OEM
™
the value of the calibration solution must
be multiplied by 100 and then transmitted to the EC OEM
™
. The calibration value will be
divided by 100 internally. Move the value from a float to an unsigned long. Break up the
unsigned long into its 4 individual bytes. Send the bytes (MSB to LSB) to registers 0x0A,
0x0B, 0x0C and 0x0D.
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
0x0A
0x0B
0x0C
0x0D
0x0E
0x0F
0x10
0x11
0x12
0x13
0x14
0x15
0x16
0x17
0x18
0x19
0x1A
0x1B
0x1C
0x1D
0x1E
0x1F
0x20
0x21
0x22
0x23
MSB
LSB
0xC0
0xE1
0xE4
0x00
Write
Write
Write
Write
0xC0
0xE1
0xE4
0x00
0x00E4E1C0
0x0A
0x0B
0x0C
0x0D
MSB
LSB
0xC0
0xE1
0xE4
0x00
Write
Write
Write
Write
0xC0
0xE1
0xE4
0x00
0x00E4E1C0
0x0A
0x0B
0x0C
0x0D
21
Copyright © Atlas Scientific LLC
R/W
R/W
R/W
R/W
0x04: Interrupt control
0x05: LED control
0x06: Active/hibernate
0x07: New reading available
R/W
R
Read only
Read and write
Accessible registers
R/W
R/W
0x02: SMBus/I
2
C address lock/unlock
0x03: SMBus/I
2
C address
0x10: Temperature compensation MSB
0x11: Temperature compensation high byte
0x12: Temperature compensation low byte
0x13: Temperature compensation LSB
0x14: Temperature confirm MSB
0x15: Temperature confirm high byte
0x16: Temperature confirm low byte
0x17: Temperature confirm LSB
Confirmation
Compensation
R
R
0x00: Device type
0x01: Firmware version
Device information
Device address
R/W
R/W
0x08: Set probe type MSB
0x09: Set probe type LSB
R/W
0x0E: Calibrate request
0x0F: Calibration confirm
Probe type
Control
R/W
R/W
R/W
R/W
0x0A: Calibration value MSB
0x0B: Calibration value high byte
0x0C: Calibration value low byte
0x0D: Calibration value LSB
0x18: EC reading MSB
0x19: EC reading high byte
0x1A: EC reading low byte
0x1B: EC reading LSB
Sensor Data
R
R
R
R
R
R
R
R
R
R
R
R
0x1C: TDS reading MSB
0x1D: TDS reading high byte
0x1E: TDS reading low byte
0x1F: TDS reading LSB
R
R
R
R
0x20: Salinity reading MSB
0x21: Salinity reading high byte
0x22: Salinity reading low byte
0x23: Salinity reading LSB
R
R
R
R
Calibration
R