The sample to be tested does not require any pretreatment. The water sample riser is directly inserted into the system water sample and the total nitrogen concentration can be measured. The maximum measurement range of the equipment is 0~500mg/L TN. This method is mainly used for on-line automatic monitoring of the total nitrogen concentration of waste (sewage) water discharge point source, surface water, etc.3.2 Systems definition
Methods | Resorcinol spectrophotometry | |
Measuring range | 0.0 ~10mg/L, 0.5~100 mg/L, 5~500 mg/L | |
Stability | ≤10% | |
Repeatability | ≤5% | |
Measurement period | minimum measuring period of 30 min, according to actual water samples, can be modified at 5 ~ 120min arbitrary digestion time. | |
Sampling period | the time interval (10 ~ 9999min adjustable) and the whole point of measurement mode. | |
Calibration period | 1~99 days, any interval, any time adjustable. | |
Maintenance period | once a month, each about 30 min. | |
Reagent for value-based management | Less than 5 yuan/samples. | |
Output | two channel RS-232, two channel 4-20mA | |
Environmental requirement | temperature adjustable interior, it is recommended temperature 5~28℃;humidity≤90%(no condensing) | |
Power supply | AC230±10%V, 50±10%Hz, 5A | |
Size | 1570 x500 x450mm(H*W*D). | |
Others | abnormal alarm and power failure will not lose data; |
Touch screen display and command input
Abnormal reset and power off after the call, the instrument automatically discharge the residual reactants inside the instrument, automatically return to work
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