Continued on next page 1042 • OD Determination 1 COD heating blocks only in conjunction with controller TRS 300 Precision heating blocks for 6, 12, or 24 samples. Surface heating for particularly even temperature distribution over all sample positions. Enclosure made of powder-coated steel and stainless steel. Non-hazardous temperatures of the enclosure surface thanks to the sophisticated insulation of the heating block. Continuous grooves in the floors of the bores simplify sample handling and increase user safety: • The grooves provide pressure compensation when the sample vessels are inserted. Thus, even precisely fitting vessels are easy to insert in the bores for user-friendly handling of the vessel frame. • Traces of fluids on the outer walls of the sample vessels evaporate instantly when the samples are inserted into the heated block. The grooves discharge the steam and prevent glass breakage as a consequence of cracked vessels. • In case of vessel overflow, the sample will flow off through the grooves, reducing the risk of acid damaging the heating block. Technical data: CSB 6/E CSB 12/E CSB 24/E Sample positions: 6 12 24 Maximum temperature: 299°C 299°C 299°C Power consumption: 800 W 1500 W 2000 W Article Order No. CSB 6/E 10 48 21006 COD acc. to ISO Precision heating block thermostat for 6 test tubes RG, 20 – 300°C 1CSB 12/E 10 48 21012 COD acc. to ISO Precision heating block thermostat for 12 test tubes RG, 20 – 300°C CSB 24/E 10 48 21024 COD acc. to ISO Precision heating block thermostat for 24 test tubes RG, 20 – 300°C 2 Programmable Temperature and Time Controller TRS 300 Programmable controller for behrotest® digestion blocks behr single-button operation for particularly fast and easy programming. Menu in local language. 10 freely configurable programs for block temperature and digestion time. The TRS 300 has a special, factory preset CSB program (chemical oxygen demand of water/ COD). In CSB/COD mode, it heats to a temperature 20°C above the specified setpoint temperature. After sample insertion, the setpoint temperate increased by 20°C is retained for another 6 minutes. This procedure ensures compliance with the ISO specification of heating to 148°C within 10 minutes, and simultaneously provides for an extremely constant temperature during the subsequent reaction process. With the Windows software comprised in the delivery, the user can transmit application-specific time/temperature profiles through the RS232 interface bi-directionally between one or several units (TRS 300) and one PC. Furthermore, the RS232 interface allows for transmission of temperature data from the unit to the PC while the unit is operating. If required, the data may be saved and printed out in form of a diagram. In case of short-circuits or temperature sensor failure, the connected units will be switched off by means of the integrated safety functions. Article Order No. 2TRS 300 10 48 20300 Temperature and time controller, microprocessor-controlled unit, up to 10 temperature-and-time combinations can be programmed behrotest® Manual Titration Station HTI 1 The manual titration station HT1 consists of • a burette with digital display, and • a magnetic stirrer with accurately frame for COD sample vessels. A screen is used as a neutral background, allowing the user an accurate identification of the color change at the end of titration. Thus, the user carries out all titrations under similar optical conditions, increasing the accuracy and reproducibility of the results. The exact positioning of the sample vessel in the rack on the top of the magnetic stirrer also contributes to this result. The inclined side panels of the screen provide an additional protection from lateral glare. COD pursuant to ISO, EN, and DEV. Technical data: Voltage: 230 V AC/115 V AC Frequency: 50/60 Hz Weight: approx. 3.5 kg Dimensions in cm (W × D × H): approx. 33 × 20 × 60 Article Order No. 3HTI 1 10 48 30300 Manual titration station, with digital burette and magnetic stirrer 3 Special Analysis Water, Environment
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