Hanna Instruments HI839150 COD Reactor
Instruction Manual
1. Preliminary Examination
Upon receiving the instrument, carefully remove it and its accessories from the packaging and examine them. For any assistance, please contact your local Hanna Instruments office or email tech@hannainst.com.
Each HI839150 is supplied with:
- HI740217 Laboratory safety shield
- Power cable
- Quick reference guide with instructions for manual download and instrument quality certificate
Note: Save all packing material until you are sure the instrument functions correctly. Any damaged or defective items must be returned in their original packing material with the supplied accessories.
Reactor Models:
- HI839150-01: 115 Vac, USA plug
- HI839150-02: 230 Vac, European plug
2. Safety Measures
⚠️ HOT SURFACE
DO NOT TOUCH Touching the reactor block surfaces and vials while hot can cause serious burns.
Pay attention to all danger and caution statements. Failure to do so could result in injury to the operator or damage to the equipment. Do not use the reactor in any manner other than that specified in this manual.
Safety Equipment:
- Use care and wear suitable eye protection and clothing when operating the reactor.
- Use of the supplied safety shield is strongly recommended.
Reagent Spills:
- If a reagent spill occurs, wipe up immediately and rinse with plenty of water.
- If reagent contacts skin, rinse the affected area thoroughly with water.
- Avoid breathing released vapors.
Waste Disposal:
- Contact a licensed waste disposal provider for proper disposal of reagent vials and reacted samples.
Fire Hazard:
- Keep flammable liquids away from the operating reactor.
3. General Description
The HI839150 is a robust 25-vial capacity thermo-reactor designed for Chemical Oxygen Demand (COD) determination of industrial wastewater. The reactor features two stored digestion temperature programs supporting analysis methods at:
- 150 °C (for all COD methods, Iron Total, Phosphorus Acid Hydrolyzable, Phosphorus Total methods)
- 105 °C (for Chromium and Nitrogen Total methods)
Main Features:
- Up to 180 minutes built-in countdown timer.
- Indicator lights for POWER (on), HOT (surface), and HEATING (in progress).
- Reactor block temperature continuously evaluated and displayed.
- Reference temperature probe well.
4. Specifications
| Parameter | Specification |
|---|---|
| Temperature range | 20.0 to 160.0 °C (68 to 320 °F) |
| Accuracy | ±2 °C |
| Temperature stability | ±0.5 °C |
| Capacity | 25 vials; Ø 16 mm × 100 mm (Ø 0.63″ × 3.94″) |
| Reference temperature probe well | Included |
| 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 (HI839150-01) 230 Vac (HI839150-02) |
| Dimensions | 190×300×95 mm (7.5×11.8×3.7″) |
| Weight | Approximately 4.8 kg (10.6 lb.) |
5. Functional Description
Front & Top View:
The instrument features a reactor block (1) with up to 25 vial capacity, designed to hold vials and a reference temperature probe (2). The LCD display (3) shows temperature, timer, and status messages. The keypad (4) allows users to select programs, start/stop heating, and configure timer values. Reactor block status lights (5) provide visual feedback: Green for POWER (on), Red for HOT (surface), and Yellow for HEATING (in progress). A laboratory safety shield (6) is recommended for maintaining a safe working environment during digestion procedures.
Rear View:
The rear of the instrument includes an ON/OFF switch (1) for powering the unit on or off, and an AC power socket with a fuse holder (2). The power supply options are 115 Vac (HI839150-01) and 230 Vac (HI839150-02).
Keypad:
The keypad consists of several buttons:
- ▲ / ▼: Used for digestion time configuration and timer value adjustment.
- 105°C / 150°C: Selects the digestion temperature program (105 °C or 150 °C) and confirms timer value configuration.
- START: Initiates the program and starts digestion.
- STOP: Stops digestion or exits edit mode.
- BLOCK STATUS LIGHTS: Indicate the operational status: POWER (green) when the reactor is turned on; HOT (red) when the reactor block temperature is above 50 °C (122 °F); HEATING (yellow) when heating is in progress or the block maintains a stable temperature (indicated by blinking).
6. General Operations
Guidelines & Safety Precautions:
- Do not place the reactor near a heat source. Avoid the presence of flammable liquids near the operating reactor.
- Do not cover the ventilation slits on the side.
- Disconnect from power if an accidental spill occurs.
- Handling chemical samples, standards, and reagents can be dangerous. Review the Safety Data Sheets and become familiar with all safety procedures before handling any chemicals.
- The reactor block heats up a few degrees higher than the selected temperature to account for localized heat transfer to vials.
- Reactor block temperature may drop when vials are inserted. Allow time for the block temperature to reach the required digestion temperature.
6.1. Installing the Laboratory Safety Shield
The HI839150 is supplied with a laboratory safety shield featuring weighted handles that ensure proper safety positioning throughout the digestion procedure. Use of this safety shield is strongly recommended to maintain a safe working environment.
6.2. Startup
- Place the reactor on a level and stable surface.
- Connect to power. Verify the correct voltage and frequency on the back of the instrument.
- Switch the instrument on. The POWER LED will illuminate.
Upon startup, all LCD segments briefly display, followed by an initialization screen. The first LCD line displays the block temperature, and the second LCD line alternates between the current reaction time and the program temperature.
6.3. Digestion Temperature Program Selection & Timer Configuration
The reactor comes with pre-programmed temperature options: 105 °C (221 °F) and 150 °C (302 °F).
- Use the 105°C / 150°C key to select the desired program.
- To configure the timer value, long-press the 105°C / 150°C key. The timer value will begin blinking.
- Use the ▲ / ▼ keys to adjust the value and press the 105°C / 150°C key to confirm.
- With the program selected, press the START key. The reactor block will begin to warm up.
6.4. Sample Digestion Procedure
- Press the START key. The HEATING LED will light up (yellow). A "rUn Strt" message will be displayed, followed by the reactor block's current temperature and the selected program temperature.
Note:
- When the reactor block temperature exceeds 50 °C, the HOT LED (red) will start blinking.
- During warm-up (typically 10 to 15 minutes), the HEATING LED remains on (yellow) as long as the block temperature is within 10 °C of the target temperature.
After the digestion time is signaled by an acoustic signal (5 short beeps) and the "DONE" message, the heating turns off, and the block begins to cool down.
Note: To end digestion before the timer countdown finishes, press the STOP key.
7. Warnings & Errors
The instrument displays warning messages when erroneous conditions occur or when values fall outside the expected range. The following information explains common errors and warnings and recommends actions:
- "LO TEMP": Displayed during the warm-up process when the reactor block temperature is lower than the set program temperature profile.
Action: Wait for warm-up to finish. - "HI TEMP": Displayed if the reactor block temperature is above the set program temperature profile.
Action: Wait for the reactor block to cool down. - ALARM / "HEA† FAILEd": Displayed if the reactor block fails to heat up within 5 minutes after pressing the START key. A long acoustic signal alerts users to this issue.
Action: Contact Hanna Instruments technical support. - Broken temperature probe (sensor): Indicated by specific error messages or readings.
Action: Contact Hanna Instruments technical support. - HOT LED blinking: Indicates the reactor block temperature exceeds 50 °C. Do not touch the heating block.
- Temperature under/over range: Indicated by ALARM tag and an acoustic signal.
Action: Wait for warm-up to finish or wait for the reactor block to cool down.
8. Maintenance
Cleaning:
- Switch off the reactor and disconnect from power. Allow the reactor block to cool off.
- Remove vials and wipe the instrument with a soft, damp cloth.
Water should not reach inside the reactor block.
Replacing a Spent Fuse:
Replace only with a fuse of the specified type and current ratings.
- Switch the reactor off and disconnect from power.
- Turn the fuse holder counterclockwise until it disengages.
- Retain the cap that holds the fuse, and replace the fuse in the cap with a new, appropriately rated fuse. For example, use "8 AT" for the HI839150-01 model and "5 AT" for the HI839150-02 model.
- Replace the fuse holder and rotate it clockwise.
9. Hanna Instruments Methods that Require Digestion
The HI839150 supports various COD determination methods. Below is a summary of common methods:
COD METHODS – HI801, HI83399, HI83314, HI97106
| Parameter | Method | Reagent set (vial identification) | Range | Accuracy | Temperature / Digestion time |
|---|---|---|---|---|---|
| COD LR EPA | Adaptation of the US EPA 410.4 Approved Method for the COD Determination on Surface Waters and Wastewaters | HI93754A-25 (COD A, red label) | 0 to 150 mg/L (as O₂) | ±5 mg/L or ±4% of reading (whichever is greater) | 150 °C / 120 minutes |
| COD LR Mercury Free | Adaptation of the US EPA 410.4 Approved Method for the COD Determination on Surface Waters and Wastewaters H1801 Dichromate Mercury Free | HI93754D-25 (COD D, red label) | 0 to 150 mg/L (as O₂) | ±5 mg/L or ±4% of reading (whichever is greater) | |
| COD LR ISO | Adaptation of the US EPA 410.4 Approved Method for the COD Determination on Surface Waters and Wastewaters H1801 Dichromate ISO | HI93754F-25 (COD F, red label) | 0 to 150 mg/L (as O₂) | ±5 mg/L or ±4% of reading (whichever is greater) | |
| COD MR EPA | Adaptation of the US EPA 410.4 Approved Method for the COD Determination on Surface Waters and Wastewaters HI83314, HI83399, HI97106 | HI93754B-25 (COD B, white label) | 0 to 1500 mg/L (as O₂) | ±15 mg/L or ±4% of reading (whichever is greater) | 150 °C / 120 minutes |
| COD MR Mercury Free | Adaptation of the US EPA 410.4 Approved Method for the COD Determination on Surface Waters and Wastewaters H1801 Dichromate Mercury Free | HI93754E-25 (COD E, white label) | 0 to 1000 mg/L (as O₂) | ±15 mg/L or ±3% of reading (whichever is greater) | |
| COD MR ISO | Adaptation of the US EPA 410.4 Approved Method for the COD Determination on Surface Waters and Wastewaters H1801 Dichromate ISO | HI937546-25 (COD G, white label) | 0 to 1000 mg/L (as O₂) | ±15 mg/L or ±3% of reading (whichever is greater) | |
| COD HR EPA | Adaptation of the US EPA 410.4 Approved Method for the COD Determination on Surface Waters and Wastewaters HI83314, HI83399, HI97106 | HI93754C-25 (COD C, green label) | 0 to 15000 mg/L (as O₂) | ±150 mg/L or ±2% of reading (whichever is greater) | 150 °C / 120 minutes |
| COD UHR | Adaptation of the US EPA 410.4 Approved Method for the COD Determination on Surface Waters and Wastewaters | HI93754J-25 (COD J, blue label) | 0.0 to 60.0 g/L (as O₂) | ±0.5 g/L or ±3% of reading | 150 °C / 120 minutes |
OTHER METHODS – HI801, HI83399, HI83314
| Parameter | Method | Reagent set (vial identification) | Range | Accuracy | Temperature / Digestion time |
|---|---|---|---|---|---|
| Chromium, (VI)/Total | Adaptation of the Standard Methods of the Examination of Water and Wastewater, 22nd Edition, 3500-Cr, Diphenylcarbazide Method | HI96781-25 (Cr, red label) | 0 to 1000 µg/L (as Cr) | ± 10 µg/L or ±3% of reading | 105 °C / 60 minutes |
| Iron, Total | Adaptation of Standard Methods for the Examination of Water and Wastewater, 23rd Edition, 3500-Fe B, Phenanthroline Method | HI96778-25 (IRON, red label) | 0.00 to 7.00 mg/L (as Fe) | ±0.20 mg/L or ±3% of reading (whichever is greater) | 150 °C / 30 minutes |
| Nitrogen, Total LR | Chromotropic Acid Method | HI93767A-50 (N LR, green label) | 0.0 to 25.0 mg/L (as N) | ±1.0 mg/L or ±5% of reading (whichever is greater) | 105 °C / 30 minutes |
| Nitrogen, Total HR | Chromotropic Acid Method | HI93767B-50 (N HR, red label) | 0 to 150 mg/L (as N) | ±3 mg/L or ±4% of reading (whichever is greater) | 105 °C / 30 minutes |
| Phosphorus, Acid Hydrolyzable | Adaptation of the EPA Method 365.2 and Standard Methods for the Examination of Water and Wastewater, 20th Edition, 4500-P E, Ascorbic Acid Method | HI93758B-50 (PAH, white label) | 0.00 to 1.60 mg/L (as P) | ±0.05 mg/L or ±5% of reading (whichever is greater) | 150 °C / 30 minutes |
| Phosphorus, Total LR | Adaptation of the EPA Method 365.2 & Standard Methods for the Examination of Water and Wastewater, 20th Edition, 4500-P E, Ascorbic Acid Method | HI93758C-50 (P TLR, red label) | 0.00 to 1.15 mg/L (as P) | ±0.05 mg/L or ±6% of reading (whichever is greater) | |
| Phosphorus, Total HR | Adaptation of Standard Methods for the Examination of Water and Wastewater, 20th Edition, 4500-P C, Vanadomolybdophosphoric Acid Method | HI93763B-50 (P THR, green label) | 0.0 to 32.6 mg/L (as P) | ±0.5 mg/L or ±5% of reading (whichever is greater) | 150 °C / 30 minutes |
10. Additional Equipment & Accessories
The following items are available from Hanna Instruments:
| Ordering Information | Product Description |
|---|---|
| HI740216 | Test tube cooling rack |
| HI740217 | Laboratory bench safety shield |
| HI801 | iris® Spectrophotometer |
| HI83224 | COD meter and multiparameter photometer |
| HI83314 | Multiparameter photometer with COD for wastewater |
| HI83399 | Photometer with COD for water & wastewater |
| HI83746 | Photometer for the determination of concentration of reducing sugars |
| HI97106 | COD portable photometer |
| HI83746-20 | Reducing sugar analysis reagents set |
| HI93703-59 | Charcoal for decoloration of red wine |
| HI93754X-25* | COD reagent vial sets of different ranges |
| HI93758B-50 | Phosphorus, Acid Hydrolyzable reagent set |
| HI93758C-50 | Phosphorus, Total LR reagent set |
| HI93763B-50 | Phosphorus, Total HR reagent set |
| HI93767A-50 | Nitrogen, Total LR reagent set |
| HI93767B-50 | Nitrogen, Total HR reagent set |
| HI96778-25 | Iron, Total reagent set |
| HI96781-25 | Chromium, (VI)/Total reagent set |
* Go to www.hannainst.com for reagent vial sets ordering codes.
11. Certification
All Hanna Instruments conform to the CE European Directives and UK Standards. ?? ?? ♻️
Disposal of Electrical & Electronic Equipment:
This product should not be treated as household waste. Instead, hand it over to the appropriate collection point for the recycling of electrical and electronic equipment, which will conserve natural resources.
Disposal of waste batteries:
This product contains batteries; do not dispose of them with other household waste. Hand them over to the appropriate collection point for recycling.
Ensuring proper product and battery disposal prevents potential negative consequences for the environment and human health. For more information, contact your city, your local household waste disposal service, or the place of purchase.
12. Recommendations for Users
Before using this product, ensure it is entirely suitable for your specific application and for the environment in which it is used. Any variation introduced by the user to the supplied equipment may degrade the meter's performance. For your and the meter's safety, do not use or store the meter in hazardous environments.
13. Warranty
The HI839150 is warranted for two years against defects in workmanship and materials when used for its intended purpose and maintained according to instructions. This warranty is limited to repair or replacement free of charge. Damage due to accidents, misuse, tampering, or lack of prescribed maintenance is not covered.
If service is required, contact your local Hanna Instruments office. If the product is under warranty, report the model number, date of purchase, serial number (engraved on the bottom of the meter), and the nature of the problem. If the repair is not covered by the warranty, you will be notified of the charges incurred. If the meter is to be returned to Hanna Instruments, first obtain a Returned Goods Authorization (RGA) number from the Technical Service department and then send it with shipping costs prepaid. When shipping any meter, ensure it is properly packed for complete protection.
Hanna Instruments
