2 sensor serial number, 3 sensor status, 4 last factory calibration – In-Situ Aqua TROLL 400 Modbus and SDI-12 Reference Guide User Manual
Page 29: Sensor serial number, Sensor status, Last factory calibration

Register
Size
(registers)
Mode & Access Level
(R/W)
Data
Type
Description
0020
1
R1/W3
ushort Alarm/warning parameter number
(1 – N, default = 1)
0021
1
R1/W3
16 bits Alarm and warning enable bits
(default = 0)
Bit 0 = High alarm enabled
Bit 1 = High warning enabled
Bit 2 = Low warning enabled
Bit 3 = Low alarm enabled
Bit 4 = Sensor calibration warning
0022
2
R1/W3
float
High alarm set value (default = 0.0)
0024
2
R1/W3
float
High alarm clear value (default = 0.0)
0026
2
R1/W3
float
High warning set value (default = 0.0)
0028
2
R1/W3
float
High warning clear value
(default = 0.0)
0030
2
R1/W3
float
Low warning clear value
(default = 0.0)
0032
2
R1/W3
float
Low warning set value (default = 0.0)
0034
2
R1/W3
float
Low alarm clear value (default = 0.0)
0036
2
R1/W3
float
Low alarm set value (default = 0.0)
4.2 Sensor Serial Number
This field returns the serial number of the installed sensor cap. The probe returns zero if the
sensor cap is not installed or is expired.
4.3 Sensor Status
Bit 9 of the sensor status register is set to indicate when the sensor cap is not installed.
4.4 Last Factory Calibration
This field returns the start time of the installed sensor cap. If the cap has not been used, the cap
manufactured time is returned. The probe returns zero if the sensor cap is not installed.
29