| |
NH3Sys_PBS1
Process buoy for
Ammonia
|
| NH3Sys_PBS1
is an insitu Ammonia - Nitrogen analyser, utilising a gas
sensitive electrode as the detection device.
It
is a complete self-calibrating wet chemical analyser and
sample preparation system in a single insitu housing, removing
the need for pumps, pipes sample preparation and GRP housings.
|
|
Sampling
is by means of hydrostatic head, which first fills a settlement
chamber to reduce solids to a minimum. Clarified liquid is
then allowed into the measuring chamber, where EDTA/caustic
solution is dosed and stirred to raise pH to 11.5 . When equilibrium
is reached the NH3-N signal is logged and stored. The system
is then pressurised by the on board compressor to evacuate
the liquid sample and the whole cycle is repeated. On calibration
the sample is retained in the measuring cell and dosed with
one and then eight aliquots of high standard, the response
being logged on each occasion. The method of standard addition
is then applied to calculate the new offset and slope.
The data is logged and displayed in numeric and graphical
format. The system is designed for use in activated sludge
basins, bed effluents and final effluents.. |
|
| FEATURES
& BENEFITS
|
- In-Situ
operation
- Auto cleaning
and calibration
- No sample
preparation needed
- Analysis
specific to NH3-N
|
- Data logging
- Graphical
display
- Analogue
& digital outputs
|
| APPLICATIONS
|
- Activated
sludge monitoring & control
- Final effluent
monitoring
|
|
| SPECIFICATIONS
|
NH4
Measurement
- Measuring
ranges (mg/L NH4 – N): 0.1 – 3; 0.25 – 8; 1-25;
4 - >25
- Detection
Limit: 0.1 mg/L
- Reproducibility:
3%
- Reagent consumption:
0.6 litre/month (average)
- T90 time:
3 - 5 minutes
Electrical
and standards conformity
- Buoy power:
15/24 V from controller
- Mains power:
115 VAC/230VAC 50 Hz or 60 Hz
- Average current:
0.3 A @ 115 VAC, , 0.15 A @ 230 VAC for single buoy system; 0.4
A/0.2 A for dual-buoy system
- Maximum current:
0.4 A @ 115 VAC, , 0.2 A @ 230 VAC for single buoy system; 0.6
A/0.3 A for dual-buoy system
- Power load:
45 W for single buoy; 68 W for dual buoy
- Enclosure:
IP65
- Protection
class: 1 (per IEC 4010)
- Immunity
to voltage change: EN 50022
- EMC emission:
EN 50081-1, 12/96
- EMC noise
immunity: EN 50082-2, 12/96
- Certification:
CE Mark (Declaration of conformity)
- Test method:
per DIN/VDE 0701
Dimensions
and weights:
- Process Buoy:
830 x 130mm (length x diameter); approx. 10.8 kg (filled)
- Controller,
single-buoy: 264 x 360 x 345 mm (W x H x D); 12.0 kg
- Controller,
double-buoy: 360 x 400 x 345 mm; 14.0 kg
Data display,
inputs and outputs
- Display:
LCD graphics display, 16 lines by 40 characters, backlit
Keypad: 21 key, 13 x 13 mm
- Data presentation:
6-hour graph (14-day scrollable); current value with 5-digit resolution
- Data storage:
10 days in RAM; 90 days with diskette drive (data interval 2 minutes)
- Logging of
warnings, malfunctions, limit value alarms and calibrations for
last 4 weeks (90 days with diskette drive), alerts for leakage,
defective probe, general error for outside of measuring range
- 2 x Analog
outputs: 0 - 20 mA or 4 - 20 mA selectable, electrically isolated
load max 500 ohm
- Limit value
alarms: 4 x Dry contact relay (normally closed) for user-definable
alarms
- Diskette
drive: PC-compatible 3.5" diskette drive for data storage
in CSV format
|
| Contact
Envitech or log on to our download
pages for the technical brochures |
|
| |
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
|
| ©
Envitech Ltd: 2009 |
|
|
|
