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9 Reference Data
102
9
Reference Data
9.1
Specifications
Product name
Organic Pollutant Monitor (UV meter)
Model
OPSA-150
Measurement item
UV absorbance, VIS absorbance, COD conversion concentration, TURB
(turbidity) conversion concentration
Measurement principle
Dual optical path, Dual wavelength, rotary cell length modulation method
Measurement wavelength
Ultraviolet: 253.7 nm, Visible light: 546.1 nm
Structure of analyzer unit
Circulation type
Measurement range
(converted by cell 10mm)
UV absorbance/VIS absorbance
Full scale: 0.1 Abs to 5.0 Abs (setting by 0.1 Abs is possible)
Minimum scale
0.0001 Abs (changeable to 0.001 Abs)
Repeatability
Within ±2.0% of full scale
(Within ±5.0% of full scale for 2.6 Abs to 5.0 Abs)
Linearity
Within ±2.0% of full scale
(Within ±5.0% of full scale for 2.6 Abs to 5.0 Abs)
Stability
Within ±2.0%/24 h of full scale
(Within ±4.0%/24 h of full scale for 2.6 Abs to 5.0 Abs)
Response time
T90, within 1 minute (flow rate of approximately 5 L/min)
Cleaning method
(cleaning cycle)
Automatic cleaning by wiper (automatic continuous cleaning)
Display method
LCD display:
320
×
240 monochrome graphics LCD data display with dot backlighting (a
touch-panel)
Display content:
UV absorbance, VIS absorbance, UV-VIS absorbance, COD conversion
concentration, TURB (turbidity) conversion concentration
Calibration method
Solution calibration using zero solution and span solution (calibration solution
in the ampoule)
(one-touch calibration is possible)
Sample water condition
Temperature: 2°C to 40°C (should not be frozen)
Flow rate of sample water: Min. 2 L/min, Max. 20 L/min
* Keep the unit warm (or preserve the heat) to ensure protection against
frozen sample water in the cold weather.
Ambient temperature and
humidity
Ambient temperature: 0°C to 40°C, Ambient humidity: 85% or below
Analog output
Point: 3
Type: arbitrary 3 items from UV absorbance, VIS absorbance, UV-VIS
absorbance, COD conversion concentration, and TURB (turbidity) conversion
concentration (selectable)
Specification: 4 mA to 20 mA DC or 0 mA to 16 mA DC, insulated output
(however, non-insulated among each channel)
Maximum load resistance: 600