InsiteIG MPA-48, Manual

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The Model 15/15L sensor will report the channel status as follows:
Status (hex) Description
0000 Normal
0001 Sensor not responding
0002 Sensor error
0003 Sensor requires a zero calibration
The Model 15/15L sensor will report TSS as the primary measurement and the secondary
measurement is undefined. The units for TSS are mg/l.
The Model 51/52 sensor will report the channel status as follows:
Status (hex) Description
0000 Normal
0001 Sensor not responding
0002 Sensor error
0003 Sensor error
The Model 51 sensor will report pH as the primary measurement and temperature as the secondary
measurement. The units for pH are hundredths of pH and the units for temperature are tenths of °C.
The Model 52 sensor will report ORP as the primary measurement and the secondary measurement
is undefined. The units for ORP are mV with a 2000 mV bias to make all readings positive.
Below is an example of a request to read the channel 2 status and channel 2 primary and secondary
measurement registers from an analyzer with the slave address of 1.
Field Name Example (hex)
Slave Address 01
Function 04
Starting Address Hi 00
Starting Address Lo 03
No. of Regs. Hi 00
No. of Regs. Lo 03
CRC --
Below is an example of a response to the previous query where channel 2 is connected to a Model
10 D.O. sensor measuring 8.3 ppm at 25.0°C.
Field Name Example (hex)
Slave Address 01
Function 04
Byte Count 06
Data Hi (Reg 3) 00
Data Lo (Reg 3) 00
Data Hi (Reg 4) 03
Data Lo (Reg 4) 3E
Data Hi (Reg 5) 00
Data Lo (Reg 5) FA
CRC --