6
1. Introduction
BOD measurement with RESPIROMETRIC Sensor is based on the RESPIROMETRIC method that provides a direct
measurement of the oxygen consumed by microorganisms from an air or oxygen-enriched environment in a closed
atmosphere, at a constant temperature (20 °C ± 0.5) and with a soft sample stirring.
The measurement of BMP (Biochemical Methane Potential or Biochemical Methanization Potential) represents the anaerobic
correspondent of the BOD tests in fact an adequate anaerobic microbial inoculation is used to degrade the test substrate
anaerobically. During the test the production of biogas and/or methane is proportional to the quantity of organic substance
gradually degraded.
2. Assembly and installation
Upon receipt and after having removed the packaging, please check the integrity of the instrument. The box includes:
● RESPIROMETRIC Sensor
● Alkali holder
● Instruction manual
The RESPIROMETRIC Sensor is delivered with 2 lithium batteries installed: remove the insulating strip from the rear without
opening it.
3. Operating controls
The display of the electronic measuring unit is normally turned off reducing the consumption of internal batteries. The touch of a
key activates the display which automatically is turned off after three seconds. The key activates different functions if the unit is
performing a measurement or if it is in memory code and if the unit is in wireless mode. When the display is turned off and no
analysis is performed, RESPIROMETRIC Sensor shows the symbol
by pressing any keys, in wireless mode.
3.1 Wireless or non-wireless mode
RESPIROMETRIC Sensor is already set on the wireless mode. To switch to a non-wireless mode, keep pressed SET when
the display is off until “S.E.T.” appears. When the three dots disappear:
Key
SET
Pass to wireless mode ON
Key
START
Pass to wireless mode OFF
3.2 Description of keys (wireless mode)
Out of a measuring cycle
(before starting)
Key
SET
with display off
Wireless symbol
is shown
Key
SET
with display on
Wireless symbol
is shown
Key
START
with display off
Wireless symbol
is shown
Key
START
with display on
The cycle of measurement is started
During a measuring cycle
(after starting)
Key
SET
The scale in use is shown
Key
START
The current measure is shown
(also after the 5-day period if Reset is not performed)
Key
START
kept pressed
The memory mode is entered
(also after the 5-day period if Reset is not performed)
Memory mode
(it is active during a measuring
cycle and also after if Reset is not performed)
3.3 Description of keys (non-wireless mode)
Out of a measuring cycle
(before starting)
Key
SET
with display off
The scale is shown
Key
SET
with display on
The scale is changed
Key
START
with display off
The scale is shown
Key
START
with display on
The cycle of measurement is started
During a measuring cycle
(after starting)
Key
SET
The scale is shown
Key
START
The current measure is shown
(also after the 5-day period if Reset is not performed)
Key
START
kept pressed
The memory mode is entered
(also after the 5-day period if Reset is not performed)
Memory mode
(it is active during a measuring cycle and also after if Reset is not performed)
Key
SET
The stored value is shown
Key
START
The order number of stored value is increased
If no values are stored, the display shows three points after a prolonged pressing of key START.
Reset
Keys
SET
+
START
kept pressed Measurement cycle stopped, stored values deleted and the scale is shown
Before starting a new measuring cycle, it is requested to reset the stored values.
NOTE
:
before beginning an additional RESPIROMETRIC
Sensor, it’s necessary to wait that the display shows “An”.
3.4 Last data recovery
I
f during an analysis the Wireless DataBox™ loses some data, it’s possible to retrieve the data for the last seven samplings
by pressing SET twice: in this way data will be automatically sent to the Wireless DataBox™.
EN