Analyzer module for ammonium determination 

Description:
Analyzer module for integration in a TresCon system for continuous online analysis 
of ammonium nitrogen and ammonium 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 2-point calibration with freely selectable calibration intervals and times
- 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 for optimum adjustment of reagent consumption
- 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
- Monitoring of the filling levels and fluidics 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:
Potentiometric measurement by means of gas-sensitive electrode 

Measured parameters:
NH4-N (ammonium nitrogen) and NH4+ (ammonium) 

Measuring range: 
0.1 ....1000 mg/l NH4-N or 0.1 .... 1280 mg/l NH4+

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

Measurement accuracy:
< 1mg/l NH4-N:		< 5%  0.2 of measured value
1 mg/l ... 100 mg/l NH4-N:	< 5%  0.1 of measured value
> 100 mg/l NH4-N:		< 5%  1 of measured value

Process variation coefficient <  2%

Calibration: automatic 2-point 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. 0.3 l/h; Total dissolved solids < 50 mg/l

Scope of delivery:
- 1 reagent set for three months operation
- 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:
OA 110
or equivalent
