Hach 8350.3, User Manual

Page: 3 / 128

Table of Contents
1 Specifications on page 3
2 General information on page 3
3 Modbus registers on page 5
4 Installation on page 6
5 Configuration on page 16
Section 1 Specifications
Specifications are subject to change without notice.
The product has only the approvals listed and the registrations, certificates and declarations officially
provided with the product. The usage of this product in an application for which it is not permitted is
not approved by the manufacturer.
1.1 pH/ORP sensors
8350.3 8350.4 8350.5 8351
Application
Measuring pH in
samples containing
hydrofluoric acid
Measuring pH at
high temperatures
Measuring pH in a
waste water
environment
Measuring ORP
Material PPS PPS CPVC PPS
Measurement range 0—12 pH 0—14 pH 0—12 pH ± 1500 mV
Maximum
temperature
110 °C 110 °C 80 °C 110 °C
Maximum pressure 10 bar 10 bar 10 bar 10 bar
Repeatability (week) < 0.05 pH < 0.05 pH < 0.05 pH < 0.05 pH
Offset @ pH7 ± 0.34 pH ± 0.34 pH ± 0.34 pH N/A
Slope 56—61 mV/pH 56—61 mV/pH 56—61 mV/pH N/A
Reference
impedance @ 25 °C
< 50 Kohm < 50 Kohm < 50 Kohm < 50 Kohm
Glass impedance @
25 °C
100—150 Mohm 150—500 Mohm 50—250 Mohm N/A
8362 8417
Application
Measuring pH in pure or ultra pure
water
Measuring pH in industrial and
waste water treatment plants
Material 316L stainless steel Glass membrane, ceramic junction
Measurement range 2—12 pH 0—14 pH
Maximum temperature 80 °C 110 °C
Maximum pressure 6 bar @ 25 °C 10 bar @ 25 °C
Repeatability (24 hours) < 0.01 pH 0.02 pH
Input impedance > 10
6
Mohm 100 Mohm
Section 2 General information
In no event will the manufacturer be liable for damages resulting from any improper use of product or
failure to comply with the instructions in the manual. The manufacturer reserves the right to make
changes in this manual and the products it describes at any time, without notice or obligation.
Revised editions are found on the manufacturer’s website.
English 3