Hach BODTrak II - User Manual

Other manuals for Hach BODTrak II

Basic User Manual168 pages

Questions and Answers

S
Sarah PatelAug 2, 2025
What to do if there is high oxygen demand in Hach Medical Equipment?
- B
  blackangelaAug 2, 2025
  If you observe a high oxygen demand in your Hach Medical Equipment samples, it could be due to the sample being above the range (for example, a BOD over 350 mg/L when a 160-mL sample is taken). To address this, dilute the sample or use a higher BOD range and a different sample volume. Alternatively, you can use the results from the Chemical Oxygen Demand (COD test) and multiply the COD by 0.68 to get an estimated BOD value. You might also use the results from a series of BOD tests that use the same sample but different volumes. Also, use dilution ratios to select an applicable BOD range or prepare a sample dilution.
J
Jeffrey Preston Jr.Aug 7, 2025
How to fix excessive time lag in Hach Medical Equipment?
- M
  Mark PachecoAug 8, 2025
  If you're experiencing an excessive time lag with your Hach Medical Equipment, it might be because the test didn't start with enough bacteria during the incubation period. You can resolve this by seeding the sample. Also, bacteria acclimation can cause this issue, so add more seed or select a different seed source.
W
William RobinsonAug 12, 2025
Why is there nitrification in my Hach Medical Equipment, and how do I fix it?
- L
  Leslie BrownAug 12, 2025
  If you notice a deviation from the typical curve (shown as the dashed line) indicated by the concave increase near the end of the test period, it indicates nitrification. Control nitrification problems in Hach Medical Equipment with Hach Nitrification Inhibitor. Dispense the inhibitor powder into an empty sample bottle and then add the sample.
M
matthew89Aug 17, 2025
What to do if Hach Measuring Instruments show high oxygen demand?
- D
  Danny PerezAug 17, 2025
  If you observe a high oxygen demand in your Hach Measuring Instruments, it might be because the initial sample temperature was below 20 ºC or the sample is supersaturated with oxygen. In such cases, dilute the sample, or use a higher BOD range with a different sample volume.
N
Noah BlevinsAug 22, 2025
What to do if Hach Measuring Instruments show excessive time lag?
- E
  Edward ThompsonAug 22, 2025
  If your Hach Measuring Instruments show an excessive time lag, seed the sample. This issue may also arise due to bacteria acclimation. If this is the case, add more seed or select a different seed source.
L
Leah GlennAug 27, 2025
What to do if Hach Measuring Instruments bottle leak?
- S
  savannah68Aug 28, 2025
  If you notice a bottle leak with your Hach Measuring Instruments, examine the seal cup and bottle cap for any signs of contamination or damage.

Summary

Section 1 Specifications

General Specifications

Details on range, dimensions, power, capacity, weight, operating/storage temperatures.

Method Performance Specifications

Precision, drift, and resolution of the BODTrak II method.

Section 2 General Information

Safety Information

Guidance on hazard symbols, warnings, and precautions for safe operation.

Theory of Operation

Section 3 Installation

Electrical Installation

Section 4 Operation

Operational Controls

Identification and function of the instrument's main controls and display.

Channel Selection and Navigation

Downloading and Printing Test Results

Steps for transferring, importing, formatting, and printing test data.

Section 5 BODTrak II Procedures

BOD Test Procedures

Detailed steps for Simplified, Hach GGA, and Hach Standard Method procedures.

Completion and Result Determination

Steps for sample completion, instrument setup, and calculating results.

Special Considerations for BOD Testing

Section 6 Maintenance

Cleaning the Instrument

Section 7 Troubleshooting

Incorrect BOD Curve Analysis

Common Troubleshooting Issues

Hach BODTrak II Specifications

General

Parameter Measured	Biochemical Oxygen Demand (BOD)
Resolution	0.1 mg/L
Interface	USB
Power Supply	100 - 240 VAC, 50/60 Hz
Measurement Principle	Respirometric
Measurement Range	0 - 350 mg/L BOD (direct); 0 - 700 mg/L BOD (with 1:1 dilution)
Number of Samples	6
Temperature Control	Yes
Display	LCD
Data Storage	Internal memory for multiple test results