COD Test Tube Heater - HI839800
HI839800 is a robust, 25 vial capacity thermoreactor for COD determination of industrial wastewater. The reactor has three stored and three programmable (custom) temperature programs.
The stored programs support analysis methods at:
• 170 °C (COD methods)
• 150 °C (COD methods, Iron Total, Phosphorus Acid
Hydrolyzable, Phosphorus Total methods)
• 105 °C (Chromium (VI) and Total, Nitrogen Total methods)
The HI839800 COD Test Tube Heater features two predefined temperature profiles: 150ºC and 105ºC. Digestions for chemical oxygen (COD) and total phosphorus are conducted at 150ºC, while total nitrogen digestions are conducted at 105ºC. The test tube heater automatically heats up to the set temperature, holding it until the countdown timer has finished. Once the timer has ended, a beep will sound and the heating element will turn off. The outer casing of the HI839800 remains cool to the touch, even during a timed digestion. An optional lab safety shield and test tube cooling rack provide a complete setup for sample digestions.
Features at-a-glance
Predefined Temperature Settings - The test tube heater features two predefined temperature profiles at 150ºC (221ºF) and 105ºC (301ºF) that can be selected at the press of a button.
Temperature Alerts - The HI839800 alerts users in the event that the temperature of the heating block is either above or below the set temperature. A timer icon reminds users to wait until the heating block has cooled or warmed up before inserting their samples.
Built-in Timer - A built-in countdown timer of up to 180 minutes allows users to easily set the required digestion time by simply pressing the up and down arrows. Once a time has been set and the heating element is stable, a press of the START button begins the digestion procedure.
Status Indicator Lights - Three LED lights are featured on the HI839800. A green LED indicates the heater has been turned on; a yellow LED indicates when the heater is actively heating up to a set temperature; a red LED indicates when the heater goes above 50ºC, reminding the user that the aluminum element is hot.
Overheating Prevention - The HI839800 contains a thermal fuse that prevents overheating. Should overheating occur, the heater automatically shuts down and all LED indicator lights turn off.
Reference Temperature Well - In addition to the 25 vial capacity of the aluminum heating block, a small well is available for a temperature probe for users that wish to verify their heating block.
Two Operating Modes - The HI839800 features two operating modes: idle and heating. Idle mode is the default mode in which the heater measures and displays the current temperature, target temperature, set reaction time, and an “idle” tag. Heating mode is activated when users press the START button; it starts when actively heating and continues during the countdown timer.
Continuous LCD Display - The block temperature is continuously displayed on the easy to read LCD display, even when there is no active temperature program running. All relevant information in addition to temperature are easily visible during idle and heating mode.
Error Messages - Messages on display alerting to problems including high or low temperature, hot surface, or heating system malfunction.
Specifications
|
Power Supply |
115 Vac; 60 Hz; 250 W |
|
Environment |
5 to 50°C (41 to 122°F) |
|
Dimensions |
190 x 300 x 95 mm (7.5 x 11.8 x 3.7") |
|
Weight |
approximately 4.8 kg (10.6 lb) |
|
Resolution |
0.1°C / 0.1°F |
|
Accuracy |
±0.4 °C / ±0.8 °F COD |
|
Temperature of reaction |
105°C or 150°C (221°F or 302°F) |
|
Temperature Stability |
±0.5°C |
|
Temperature Range |
-10°C to 160°C |
|
Temperature Accuracy |
±2°C (@ 25°C) |
|
Capacity |
25 vials (dia 16 x 100 mm), 1 receptacle for a stainless steel reference thermometer |
|
Warm up Time |
10 to 15 minutes, depending on selected temperature |
|
Operation Mode |
timed (0 to 180 minutes) or infinity mode |
|
Heater Block Material |
Aluminium |
|
Ordering information |
HI839800 is supplied with a power cable and instruction manual. |
Features at-a-glance
- Flexibility in supporting applications that require custom programs (time and temperature)
- Laboratory safety shield included
• The included safety shield is highly recommended to use during vial digestion procedure to maintain a safe working environment - Reactor block temperature continuously evaluated and displayed
- Built-in countdown timer
• A timer of up to 180 minutes is included for applications that require timed digestions. The end of the digestion time is signaled by 5 short acoustic beeps and “DONE” message is displayed. The heating is turned off and the block begins to cool off. - Status indicator lights
• POWER (on)
• HOT (surface)
• HEATING (in progress) - Overheating prevention
- Reference temperature probe well
• A small temperature well can accommodate a temperature probe, useful for verifying the heating block. - Warnings and error messages
• The instrument displays warning messages when erroneous conditions appear and when values are outside the expected range such as high or low temperature, hot surface, or heating system malfunction.
Specifications
| Temperature range* | 30.0 to 170.0 °C (86 to 338 °F) |
| Set temperature programs | 105 °C , 150 °C and 170 °C |
| Accuracy | ±2 °C |
| Temperature stability | ±0.5 °C |
| Capacity | 25 vials; Ø 16 mm x 100 mm (Ø 0.63” x 3.94”); Reference temperature probe well |
| Warm-up time | 10 to 15 minutes, depending on selected temperature |
| Digestion time | 1 to 180 minutes |
| Environment | 5 to 50 °C (41 to 122 °F) |
| Power supply (fuse protected) | 115 Vac (HI839800-01); 230 Vac (HI839800-02) |
| Dimensions | 190 x 300 x 95 mm (7.5 x 11.8 x 3.7”) |
| Weight (without safety shield) | approximately 4.8 kg (10.6 lb.) |
| Ordering information | HI839800-01 (115 Vac, USA plug) and HI839800-02 (230 Vac, European plug) is supplied with HI740217 laboratory safety shield; power cable; and quick reference guide with instructions for manual download and instrument quality certificate. |