8
Name Hosting
Number
Data
Type
Length Read/
Write
Description
Measurements 0x 00 01
Floating
Point
2 Read
Storage location for measured
value
Temperature
measurement
0x 00 03
Floating
Point
2 Read
Storage location for measured
temperature
Current output
value
0x 00 05
Floating
Point
2 Read
Output current based on
PH/ORP measurements
Warning 0x 00 07 Integer 1 Read
00: Normal
01: Measurement exceeds the
upper limit
02: Measurement exceeds the
lower limit
03: Temperature exceeds the
upper limit
04: Temperature exceeds the
lower limit
Measure mode 0x 00 08 Integer 1
Read/
Write
00: pH ; 01: ORP
Address Description
Calibration Instructions
Before Calibration:
Write the value of zero calibration (i.e., the value of the first point) and the value of
slope calibration (i.e., the value of the second point) to the electrode before calibration.
If the zero calibration value is 6.86pH, write the data 0x01to register 0x36.
Send command: 01 06 00 36 00 01 A8 04.
If the slope calibration value is 4.01pH, write the data 0x01 to register 0x38.
Send command: 01 06 00 38 00 01 C9 C7.
Start Calibration:
First Step:
Clean and dry the electrode. Put the electrode in the solution 6.86 of zero point
calibration. Send command: 01 03 00 66 00 01 64 15.
After the measured ADC value is stable, read the ADC value in the 0x66 register.
Write the instruction to confirm the calibration to the 0x3E register.
Send command: 01 06 00 3E 00 FF A8 46.
Second Step:
Clean and dry the electrode ,put the electrode in the solution 4.01 of slope calibration.
Send command: 01 03 00 66 00 01 64 15.
After the measured ADC value is stable, read the ADC value in the 0x66 register.
Write the instruction to confirm the calibration to the 0x3F register.
Send command: 01 06 00 3F 00 FF F9 86.
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