Analyzer module for nitrate determination 

Description:
Analyzer module for integration in a TresCon system for continuous online analysis
of nitrate and nitrate nitrogen in aqueous solutions.

Instrument designed according to recommendations of the ATV bulletin M 269.

Performance features of the entire instrument:
- Protective low voltage in the area of the entire analyzer module
- Full text display of all instrument information and messages
- Menu-guided support of all maintenance and service functions
- Automatic zero point calibration with freely selectable calibration intervals and times
- Permanent factory calibration
- Automatic plausibility check of the calibration values
- Automatic system cleaning with freely selectable cleaning intervals and times
- Low maintenance costs
- High accuracy and reproducibility of measured values
- High long-term stability
- Different, freely selectable measuring intervals
- Fixed intervals from continuous to 30 min selectable
- Interval program for minimum consumption of chemicals 
- Gradient evaluation for automatic adjustment of the measuring interval to 
the measured value change in the sample
- Automatic service and maintenance instructions
- Automatic background correction for optimum adjustment to sample-specific colorations
- Monitoring of the filling levels and chemicals transport of the instrument 
- Reagent monitoring
- Monitoring of the sample and standard flow
- Monitoring for lack of permeate and blockage
- Temperature-controlled reference beam optic module with highest reproducibility and
accuracy of measured values and short reaction time

Measuring principle:
UV absorption method according to the 4-beam procedure

Measured parameters:
NO3-N (nitrate nitrogen) and NO3 (nitrate)

Measuring ranges: 
0.1 ... 250.0 mg/l	NO3 and  0.1 ... 60.0 mg/l NO3-N

Measuring range extension possible via an external dilution unit (e.g. PurCon).
Automatic taking into account of the dilution.

Measurement accuracy:
< 2%  0.4 of measured value

Process variation coefficient <  2%
  
Calibration: 
Automatic zero point calibration, permanent factory calibration

Response time: 
(T90) < 3 minutes (till measured value display after concentration change at the sample inlet)

Measuring operation: 
continuous or intervals: 5, 10, 15, 20, 25, 30 min

Sample requirement: 
approx. 0.5 l/h; Total dissolved solids < 50 mg/l

Scope of delivery:
- 10l zero standard
- 1.5l HCl cleaning solution 
- 1 set of wear parts for 1 year
- 1 operating manual

The operation, parameterization, data input and data output as well as the power supply 
take place via the system controller. Environmental conditions, test certificates and protective class 
correspond to the basic instrument of the multiparameter analyzer system if the module is installed 
and operated according to regulations.

Manufacturer:
WTW

Type:
ON 210
or equivalent
