Dr-803n water quality automatic sampler (mixed sample supply self emptying type)

Application Overview
The automatic water quality sampler is widely used in the inlet and outlet of pollution sources and sewage treatment plants, and is used online with online monitors such as cod, ammonia nitrogen, total phosphorus, total nitrogen and heavy metals
The designed flow * sampling mode can automatically adjust the sampling flow according to the instantaneous flow to realize continuous sampling and ensure that the collected water samples are more representative
It has the functions of AB barrel mixed sample supply, automatic emptying of sample retention bottles, automatic addition of preservative to retained water samples, etc
it is an ideal supporting equipment for the on-line monitoring system of water pollution sources and the overall solution of total emission reduction

Functional features
Sampling function: it can realize timing sampling, equal proportion of time, equal proportion of flow, flow *, external control sampling, serial port control and other sampling trigger modes;
Sample retention function: it can realize over standard sample retention, synchronous sample retention, direct sample retention and serial port control sample retention;
Sample supply function: it can provide uninterrupted mixed water samples to multiple online monitors such as cod, ammonia nitrogen and heavy metals at the same time
Manual comparison sampling port: it has manual sampling port, which can realize the manual comparison function of mixed water samples;
Records: with sample retention records, door opening and closing records, power failure records and alarm records;
Power off protection: power off automatic protection, power on automatic recovery;
Remote control (optional): it can realize remote status query, parameter setting, record upload, remote control sample retention, etc;
Digital temperature control: accurate digital temperature control of refrigerator, equipped with soaking system, the temperature is uniform and accurate;
Automatic moistening and washing: before each sampling, moisten and wash the pipeline with the water sample to be tested to retain the representativeness of the sample
Automatic emptying of mixing barrel: the mixing barrel has the function of rapid automatic emptying;
Automatic emptying: it can realize the automatic emptying of pipeline and sampling bottle water sample;
Cleaning function: the sampling pipeline and sampling bottle can be automatically cleaned before each sampling to ensure that the samples collected each time will not interfere with each other;
Automatic addition of preservative: one or more water sample preservatives can be automatically added according to the configuration;
External pump control: directly control the external pump to lengthen the sampling distance;
Pipeline optimization: the sampling and sample supply pipeline adopts hard PVC material to ensure the effectiveness and timeliness of water sample collection

Technical indicators

Sampling bottle	Specification: 1000ml & times; 25 bottles
Single sampling quantity	10ml～1000ml
Sampling interval	1min～9999min
Sampling record	10000 articles
Door opening and closing record	Article 2000
Power failure record	Article 2000
Sampling error	& plusmn; 7%
Proportional sampling error	& plusmn; 8%
System clock time control error	& Delta; 1≤ 0 1%  & Delta; 12≤ 30s
control accuracy	2℃～6℃（±1 5℃）
Sampling vertical height	& ge; 8m
Horizontal sampling distance	& ge; 80m
Air tightness of pipeline system	& le;- 0 085MPa
Mean time between failures (MTBF)	& ge; 1440 H / time
Insulation impedance	＞ 20 MΩ
communication interface	RS-232/RS-485
Analog interface	4mA ~ 20mA
Digital input interface	Switching value