Introduction:

Industrial online PH/ORP controller PH6800 is single channel PH or ORP controller. It can measure and control PH value of water continuously, the PH controller is applicable for municipal waste water treatment, chemistry, printing and dyeing, paper, medicine, plating and environmental production etc.

In accordance with the environment and characteristics of water industry, as well as the international power supply standard, considering the electricity design in special environment, the PH controller could be supplied with power 220V AC, 110V AC and safe low voltage 24V AC, 24V DC for selection.

Main Characteristics:

English language display

Measure pH or ORP, high/low limit control, current output, digital communicationoutput (Optional)

It could be set automatic/manual temperature compensation

pH high/lowlimit alarm light, double relay, alarm delay could be set

Instrument mode isolated transmitting port, max circle resistance up to 750Ω

Backlight of LCD could select power saving mode, timing automatic off, brightness adjust,

High performance CPU, good electromagnetic compatibility

AC input be fuse

ESD over voltage protection is available

Password management avoid non-professional person to operate

Main Technical Index：

Outline dimensions and fixed Installation：

Insert the controller from the front panel, install the fix clamp(up and down), tighten with the screws.

    Chart 1  Fixed support installation  

Probe Installation：

Installation method and Attention-matter

                                       Chart 2（Several common method of installation）

In order to make sure the probe measure the real value on the pipe, bubbles should be avoided ,otherwise the value will be not accurate, please install according to the following chart:  

           Chart 3（attention matters of pipe installation）

Relay alarm description:

 When the relay is higher than (or lower than) the alarm pull in value acts, and when it is lower than (or higher than) the open limit value releases, the relay action diagram is as follows:

Note: When the relay drives the inductive load, please install an intermediate relay to prevent the contact from being broken down and ionized by the inductive back EMF and burning the contact.

4-20mA current output formula

1.PH Current output formula:
Factory setting define output current value is :0 pH is corresponding value of 4 mA; 14 pH is corresponding value of 20 mA.
I = ( D – 4 mA corresponding value）× ( 16 / (20 mA corresponding value- 4 mA corresponding value) ) + 4.00
I = ( D – 0 ）× ( 16 / 14 ) + 4.00
Note: I is output current value 4 mA≤I≤20 mA
D is pH value displayed by the instrument 0.00pH≤D≤14.00pH

2.Formula of ORP current output:
Factory setting define the output current is :-2000mV is corresponding
value of 4 mA; +2000mV is corresponding value of 20 mA.
I = ( D – 4 mA corresponding value ）× ( 16 / (20 mA corresponding value – 4 mA corresponding value) ) + 4.00
I = ( D – (-2000) ）× ( 16 / (+2000 – (-2000)) ) + 4.00
I = ( D + 2000 ）× ( 16 / 4000) ) + 4.00
Note:I is output current value 4 mA≤I≤20 mA
D is ORP value displayed by the instrument -2000mV≤D≤+2000mV