Oxitop, Operation of the single measuring system – Xylem OxiTopIS 12-6 Benutzerhandbuch
Seite 26
Application range / Delivery equipment
Instruction manual
26
27
Recommended range of application
OxiTop
â
measuring systems with inductive stirring system, for respirometric
determination of the biochemical oxygen demand (BOD) according to the self-checking
method.
Delivery equipment
Model
OxiTop
â
IS 6
OxiTop
â
IS 12
OxiTop
â
IS 12-6
Order Nr.
208 112
208 115
208 114
Inductive stirring
system (Stirring device)
6 OxiTop
â
instruments
12 OxiTop
â
instruments
6 OxiTop
â
instruments,
ready for futer
upgrade to 12.
Modularly
expandable with
OxiTop
â
-Set 2.
Equipment
3 OxiTop
â
yellow
3 OxiTop
â
green
6 OxiTop
â
yellow
6 OxiTop
â
green
3 OxiTop
â
yellow
3 OxiTop
â
green
Accessories:
Accessory set 1
(brown sample bottle,
stirring rods, rubber
quivers)
6 x
12 x
6 x
Accessory set 2
(stirring rod remover,
overflow measuring
beaker 164 ml and
432 ml, sodium
hydroxide tablets,
note block)
1 x
1 x
1 x
Operation of the Single Measuring System
OxiTop
в
в
в
в
Measuring principle
BOD measurement with the OxiTop
â
measuring system is based on pressure
measurement (difference measurement). The measuring is made by pressure
measurement via piezoresistive electronic pressure sensors.
With the following functions, the OxiTop
â
measuring system minimizes the measuring
work and is especially suited to the courses of the respirometric BOD measurement:
••••
AUTO TEMP function:
Control of the temperature adjustment and automatic start of the measurement
(1 hour after starting the OxiTop
â
measuring system at the earliest, after 3 hours at
the latest). It is not necessary to temper the samples to exactly 20°C before starting
OxiTop
â
. Samples between 15°C and 20°C can be started immediately as BOD
measurement will not begin until a stable 20°C is reached. This is controlled by
the "AutoTemp" feature.
••••
Data logging
Automatic measurement with daily storage of measured value for 5 days:
facilitates measurement without supervising, e. g. over the weekend.
••••
Current value
Indication of measured value (0 - 40 digits) corresponds to the digits of the
previous WTW BOD instruments. Conversion of mbar to digits is stored in the
instrument, i. e. evaluation of the measured values remains unchanged.
••••
Measuring range reserve
from 40 to 50 digits - for overranging without reset by opening the bottle.