Hach BODTrak User manual

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26197-18
BODTrak™
INSTRUMENT MANUAL
© Hach Company, 1995 - 1998. All rights reserved. Printed in the U.S.A. ar/lr 12-8-95 1ed
Rev. 5, 7/98
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CERTIFICATION
Hach Company certifies this instrument was tested thoroughly,
inspected and found to meet its published specifications when it
was shipped from the factory.
The Model BODTrak has been tested and is certified as indicated
to the following instrumentation standards:
FCC Part 15, Sub-Part B, Class A Limits: Supporting
test records by Intellistor, certified compliance by Hach
Company
Canadian Interference-Causing Equipment
Regulation, ICES-003, Class A: Supporting test records
by Intellistor, certified compliance by Hach Company
EN 55011/CISPR 11(EMI) “B” Limits per 89/336/EEC
EMC: Supporting test records by Intellistor, certified
compliance by Hach Company
EN 50082-1 (Immunity) per 89/336/EEC EMC:
Supporting test records by Hach Company, certified
compliance by Hach Company. Standards include:
IEC 801-2 and EN 61000-4-2 (ESD)
IEC 801-3 and EN V50140 (RF & EM Field)
IEC 801-4 and EN 61000-4-4 (Fast Transient)
EN 61000-4-5 (Surge)
RADIO FREQUENCY INTERFERENCE
“This digital apparatus does not exceed the Class A Limits for
radio noise emissions from digital apparatus set out in the Radio
Interference Regulations of the Canadian Department of
Communications.”
“Le présent appareil numérique n'émet pas de bruits
radioélectriques dépassant les limites applicables aux appareils
numériques de la class A prescrites dans le Règlement sur le
brouillage radioeléctrique édicté par le ministère des
Communications du Canada.”
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This device complies with Part 15 of the FCC Rules. Operation is
subject to the following two conditions:
(1) This device may not cause harmful interference, and (2) this
device must accept any interference received, including
interference that may cause undesired operation.
WARNING
Changes or modifications to this unit not expressly approved by
the party responsible for compliance could void the user's
authority to operate the equipment.
Note: This equipment has been tested and found to comply with the
limits for a Class A digital device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against
harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is
likely to cause harmful interference, in which case the user will be
required to correct the interference at his own expense. Shielded cables
must be used with this unit to ensure compliance with the Class A FCC
limits. Because this instrument operates on and generates radio
frequency energy, interference to radio and television reception may
occur. If such interference does occur, the operator should take the
necessary steps to correct the interference. The following techniques of
reducing the interference problems are easily applied.
•Disconnect power from the BODTrak instrument to verify the
instrument is the source of the interference.
•If the BODTrak is plugged into the same outlet as the device
with which it is interfering, try another outlet.
•Move the BODTrak away from the device receiving the
interference.
•Reposition the receiving antenna for the device receiving the
interference.
•Try combinations of the above.
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CERTIFICATION ....................................................................iii
SPECIFICATIONS .................................................................vii
SAFETY ....................................................................................ix
OPERATION .............................................................................1
SECTION 1 INTRODUCTION................................................3
1.1 Before Operating the BODTrak Instrument...................3
1.2 Unpacking the BODTrak Instrument .............................3
1.3 Applying Power..............................................................4
1.4 The BOD Test ................................................................4
SECTION 2 INSTRUMENT OPERATION............................7
2.1 Principles of Operation...................................................7
2.1.1 Oxygen Transfer to Sample ...................................7
2.1.2 Pressure Sensor Function.......................................7
2.1.3 Removing Carbon Dioxide ....................................7
2.2 Key Functions.................................................................8
2.3 Setting the Clock..........................................................10
2.4 RS232 Interface............................................................11
2.4.1 Hardware Configuration.......................................11
2.4.2 Commands............................................................12
2.4.3 Downloading and Printing Test Results...............16
SECTION 3 THE BOD TEST ................................................19
3.1 BODTrak Test Procedure.............................................19
3.2 Interpreting Test Results ..............................................26
3.2.1 Bottle Leak...........................................................26
3.2.2 Time Lag..............................................................27
3.2.3 High Oxygen Demand..........................................27
3.2.4 Nitrification..........................................................27
3.3 Accuracy Check ...........................................................28
SECTION 4 SPECIAL CONSIDERATIONS .......................31
4.1 Range and Volume Selection.......................................31
4.2 Sample Dilutions..........................................................31
4.2.1 When Oxygen Demand Exceeds 700 mg/L.........31
4.2.2 Preparing Several Identical Samples....................32
4.3 Sample Seeding............................................................32
TABLE OF CONTENTS
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4.3.1 Determining BOD of Seed...................................32
4.3.2 Determining BOD of Sample...............................33
4.3.3 Variations in Initial Bacterial Populations...........33
4.4 Sample Temperature.....................................................34
4.4.1 Other BOD Test Temperatures ............................34
4.5 Industrial Wastes..........................................................34
4.5.1 Chlorine................................................................34
4.5.2 Other Toxic Materials..........................................35
4.5.3 Seed Acclimatization ...........................................35
4.6 pH Effect ......................................................................36
4.7 Supersaturation.............................................................36
SECTION 5 MAINTENANCE...............................................37
5.1 Cleaning the BODTrak Instrument ..............................37
5.1.1 Sample Bottles .....................................................37
5.1.2 Stir Bars and Seal Cups........................................37
SECTION 6 TROUBLESHOOTING.....................................39
6.1 Adjusting the Calibration .............................................39
GENERAL INFORMATION................................................. 41
PARTS & ACCESSORIES .......................................................43
HOW TO ORDER ....................................................................45
REPAIR SERVICE ...................................................................47
WARRANTY ............................................................................48
INDEX ......................................................................................49
TABLE OF CONTENTS, continued
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SPECIFICATIONS
Range: Selectable, 0-35, 0-70, 0-350, and 0-700 mg/L
Dimensions: 33 x 30.5 x 12.7 cm (13 x 12 x 5 inches)
External Power Supply: Input–115/230 VAC, 50/60 Hz
Output–20.5 VRMS
UL, CSA, and TUV approved
Capacity: Six 473-mL bottles
Shipping weight: 9 pounds
Operating temperature: 20 °C (68 °F)
Storage temperature: Below 40 °C (104 °F)
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ix
Before attempting to unpack, set up, or operate this instrument,
please read this entire manual. Pay particular attention to all
warnings, cautions and notes. Failure to do so could result in
serious injury to the operator or damage to the equipment.
Use of Hazard Information
If multiple hazards exist, the signal word corresponding to the
greatest hazard shall be used.
DANGER
Indicates an imminently hazardous situation which, if not
avoided will result in death or serious injury.
WARNING
Indicates a potentially hazardous situation that could result in
death or serious injury or serious damage to equipment.
CAUTION
Indicates a potentially hazardous situation that may result in
minor or moderate injury.
NOTE
Information that requires special emphasis.
SHALL
This word is understood to be mandatory.
SHOULD
This word is understood to be advisory.
SAFETY
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