Products

4 contacts (NN-2000)

✔ Chemipack type pH / ORP electrode can be directly connected
✔ Easy operation, time division control and ON-OFF control are possible
✔ Equipped with 2 control contacts (H / L contacts) and upper / lower limit contacts (HH / LL contacts)
✔ External DC4 ~ 20 mA Display and control by analog signal input is possible

Features

● Either pH / ORP can be measured.
● Chemipack type pH / ORP electrodes can be directly connected.
● With pH temperature compensation function (Pt100)
● Display and control with an external DC4-20mA analog signal input is also possible.
● Automatic water quality control (time division proportional or ON-OFF control) is possible with simple operation.
● Equipped with 2 control contacts (H / L contacts) and upper / lower limit contacts (HH / LL contacts).
● DC4-20mA transmission output, with display / transmission output hold function.

Use

Continuous neutralization

The pH value of the continuously flowing raw water is adjusted to the neutral range and drained by overflow. Adjust the operating time of the grout pump to adjust the pH and inject the optimum amount of grout for the target value. If the pH value is high, the pH value may be adjusted in two steps.

Batch neutralization

If the amount to be discharged per day is fixed, the entire amount is once received in the tank, and the pH value is slowly and surely adjusted and discharged while circulating and stirring. Although it takes time to process, it can reliably process high pH values.

Carbon dioxide neutralization

Basically, it is the same idea as continuous neutralization, but when the pH value of raw water is about 8 to 11, it is a system that neutralizes using carbon dioxide gas for safer neutralization. Since high-pressure carbon dioxide injection requires finer control, it is controlled by using the NN2000 and PXR5 type PID controller together.

Redox treatment

If bacteria such as bacteria are present in the wastewater, sterilize (oxidize) with sodium hypochlorite (sterilizer), and when sterilization is completed, inject a reducing agent to offset (reduce) the sterilizing power. To do. The control is performed using an ORP (oxidation-reduction potential) meter.

specification

Model	NN-2000
Measurement input	pH：Glass electrode	ORP：Gold　or platinum electrode	DC4-20mA
Input resistance	10¹²Ω以上		50Ω
Measurement instruction range	0.00～14.00／0.0～14.0pH 　or 2.00～12.00／2.0～12.0pH	-1000～1000mV 　or -700～700mV	pH	0.00～14.00／0.0～14.0pH 2.00～12.00／2.0～12.0pH
			ORP	±1000／±700mV
			ppm	0.00～2.00／0.0～2.0ppm
			%	0.0～100.0／0～100%
Minimum instruction unit	0.01pH／0.1pH	1mV	pH	0.01pH／0.1pH
			ORP	1mV
			ppm	0.1ppm／1ppm
			%	0.1%／1%
Instruction accuracy	±0.03pH ±1digit	±10mV ±1digit	F.S.±0.5% ±1digit
Compatible temperature compensation electrode	Pt100	–	–
Output contacts	ON-OFF control HH / LL: 1c each AC250V 3A (resistive load) Time division proportional　or ON-OFF control H / L: 1a each AC250V 3A (resistive load)
Transmission output	DC4-20mA Insulated load resistance 500Ω
Power supply	AC100 / 110V　or AC200 / 220V ± 10% 50 / 60Hz
power consumption	10VA Less than
Ambient temperature / humidity	0～50℃ 85% Less than
mass	about 1.25kg

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1-12-11 Tagawakita, Yodogawa-ku,Osaka
532-0021

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