Hach BOD Direct plus, Basic User Manual

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BOD Direct plus_BMU_2 03/2016
9 Technical data
9.1 BOD Measurement System
Type BOD Direct plus
Measuring principle Respirometric; electronic pressure sensor
Measurement ranges [mg/l O
2
] 0 40, 0 80, 0 200, 0 400, 0 800, 0 2000, 0 4000
Applications BOD
5
, BOD
7
, OECD 301 F, etc.
Display Graphic display, 16 grey levels, 240 pixels wide, 128 pixels high
Automatic measurement buffer First day - hourly
Second day - every 2 hours
Third day and later - every 24 hours
Autostart Can be switched off; controlled by pressure drop in the bottle
Power supply, batteries 3 alkali-manganese cells, type C / LR14
Power supply, external 15 V DC via supplied mains adapter plug, low-voltage barrel
connector, max. power requirement 600 mA
Time Real-time clock, supported by the batteries if the device is not
provided with an external power supply
Interfaces USB host (only for USB stick), USB device, SD card
Dimensions, without stirrer
drive, W x D x H 182 mm x 376 mm x 213 mm
Weight, with batteries and
empty bottles, without mains
adapter plug and stirrer drive 4139 g
Environmental conditions 2 – 40°C, 5 – 80 % relative air humidity, non-condensing
Test approvals CE
9.2 Stirrer unit
Type Inductive stirring system
Number of positions 6
Stirring output 7 W
Speed 320 rpm, brief centring phase every 40 s
Dimensions (W x D x H) [mm] 270 x 180 x 25
Stirring position spacing 88 mm
Weight (stirrer drive) 1960 g
Housing material PVC
Environmental conditions -10°C to +56°C, 95 % relative air humidity
Operating voltage 15 V DC
Protection class IP 68
Test approvals CE
GB