CODmax chromium method COD analyzer

Instrument features:
New and unique piston pump technology
● Automatic leak monitoring system
● State diagnosis self-test system;
● User adjustable automatic cleaning and calibration cycle;
● Chinese and English operating interface
Humanized safety protection panel design

Detection principle:
The organic unity of classic potassium dichromate oxidation and new testing techniques. The sample is rapidly and thoroughly digested under strong oxidant and high temperature of 175 ° C. The optical system detects the absorbance value of the sample after complete oxidation, which is proportional to the COD value of the sample.

Technical parameters:
Test method: Potassium dichromate high-temperature digestion, colorimetric determination
Test range: 10-5000mg/l
Detection limit: 3.3mg/l (calibration curve method); 8mg/l (blank method);
Resolution:<1mg/l
Accuracy:>100mg/l:<10% reading; ＜100mg/l:＜±6mg/l
Reproducibility:>100mg/l:<5% reading; ＜100mg/l:＜±5mg/l
Response time (90%): 20min
Dissolving time: 3, 5, 10, 20, 30, 40, 60, 80, 100, 120 minutes, automatic
Test interval: continuous, 1, 2, 3, 4, 5,... 24 hours, trigger mode
Calibration interval: automatically performed at the selected interval (duration: 60 minutes)
Cleaning interval: automatically performed at the selected interval (duration: 10 minutes)
User maintenance: Maintenance interval>1 month, approximately 1 hour per month
Reagent consumption: at least 1 month (reagents and standard solutions)
Self checking system: self-monitoring of leaks; Instrument status self diagnosis
Analog output: 2-channel 0/4-20mA analog output
Relay control: 2-channel 24V 1A relay high and low point control (instrument status can be defined)
Service interface: RS232
Data communication: MODBUS RS485, Profibus DP, capable of bidirectional communication and remote control
Display large screen: LCD chart display, 240 * 128
Operation menu: Chinese/English
Data storage: 2000 sets
Sample pH: 1-12
Dissolving temperature: 175 ° C
Working temperature:+5 to+40 ° C
Power supply: 230 V AC; 10%/50-60Hz
Power consumption: approximately 100 VA
Size: 550mm × 810mm × 390mm

Ordering Guide:
LPG420: Includes: (1) Host; (2) Instructions and installation components; (3) Attached spare parts package; Excluding filter sampler.
LCW420: One set of reagents