1. debugging:
(1) Operating instructions:
The operation keys are described below:
CAL key: calibration, the calibration mode is activated, and the calibration menu is displayed.
+ Key: Number plus;-Key: Number minus; E key: Confirm key
REL1: Manually operate the relay key. REL2 is: one key is the relay manual/automatic switching key.
(2) Probe inspection and calibration:
The probe is equipped with a membrane head filled with electrolyte and exposed to the air. Be careful not to expose the probe directly to sunlight. It is suitable
The temperature should be 20 ℃ to 25 ℃, connect the secondary table, press the CAL key, the password is 22. Select air calibration, press E key to confirm, and display at this time
The indication value decreases from 600 to zero. If there is no fault code, the calibration is completed.
Altitude display values of 6.00 to 11.20mg/l or 85 to 157%SAT are normal.
Salinity display values of 9.20 to 9.30mg/l or 102%SAT is normal.
(3) Range setting steps
A: main interface-press e --- code 0 --- press "+" until 22 --- press e --- setup1 --- press e --- unit (unit) --- press "+"
OR "-" --- Select mg/L --- Press E
B: main interface-press e --- code 0 --- press "+" until 22 --- press e --- press "-" --- output --- press e twice, select
Select 4-20mA-Press E-Set 4mA-Press E-Set 20mA-Press E-Set 20mA-Press E
2. installation and maintenance note:
The dissolved oxygen probe should be gently cleaned with water regularly every week. If the membrane head is damaged, it should be replaced in time, and the electrolyte should be replaced in time.
And the probe cable should not be stressed.
Dissolved oxygen has no problem in urban sewage, and its composition must be clarified in industrial sewage, otherwise it is easy to damage the membrane head. H2S and Ammonia and Benzene
and phenol are harmful to the film head, in which case the film head must be replaced frequently.