
25
Input Registers (3xxxx Addresses)
Address Parameter
Size Note
30251
bytes
15‑14
30252
bytes
17‑16
30253
bytes
19‑18
30254
bytes
21‑20
30255
bytes
23‑22
30256
CH1 Probe Constant11 Value
uint16_t
0
= Incremental (–Min. Range Value ÷ Max. Range Value)
1
= Unit
DO probe
• DO saturation (%DO)
0 or 1
• DO concentration (mg/L)
0
• DO concentration (ppm)
1
EC probe
• EC mode (µs)
0 or 1
• TDS mode (mg/L)
0
• TDS mode (ppm)
1
• Sal % (%)
0 or 1
• Sal ppt (ppt)
0 or 1
• Sal psu (psu)
0 or 1
• Resistivity (Ohm)
0 or 1
2
= Check Glass Impedance
3
= Check Reference Impedance
4
= Temperature Compensation (–Min. Range Value ÷ Max. Range Value)
5
= Manual Temperature Compensation (–Min. Range Value ÷ Max. Range Value)
6
= Temperature Offset (–Min. Range Value ÷ Max. Range Value)
7
= Calibration Timeout (–Min. Range Value ÷ Max. Range Value)
8
= Resolution (–Min. Range Value ÷ Max. Range Value)
{0,1,2,3}
9
= Calibration Buffer
• Hanna 0
• NIST 1
10
= Measured mode (Probes measure in different parameters)
DO probe
• DO saturation (%DO)
0
• DO concentration (mg/L)
1
EC probe
• Conductivity (µs, mS)
0
• Total Dissolved Solids (ppm, ppt, mg/L, g/L)
1
• Resistivity (Ohm, Kohm, Mohm)
2
• Salinity % (%)
3
• Sal ppt (ppt)
4
• Sal psu (psu)
5
11
= Parameter Source
• Internal 0
• External 1
12
= EC Temperature Compensation Mode
• Linear 0
• Natural 1
• Standard 2
• None 3
30257
CH1 Probe Constant11 Resolution
uint8_t {0,1,2,3}