Hach BioTector B7000 User Manual

Page 135
CO2 Analyzer
INTERFACE 4-20mA
 INTERFACE defines whether the connection type of BioTector
CO
2
Analyzer is analog (4-20mA) or digital (RS232).
BAUDRATE 9600
 BAUDRATE (9600bps by default) specifies the data
communication signaling speed of CO
2
Analyzer when the
INTERFACE is programmed as RS232 above.
CO2 ANALYZER RANGE 10000ppm
 CO2 ANALYZER RANGE defines the full scale range of the CO
2
analyzer installed in the BioTector.
CO2 ANALYZER CAL
 The CO2 ANALYZER CALIBRATION menu allows the user to
change CO
2
Analyzer range and the CO
2
analyzer zero and
span parameters when necessary. If a CO
2
analyzer
recalibration is required, please contact the manufacturer or
distributor.
Cooler Program
COOLER 16.0C DIFF
 COOLER 16.0C DIFF, defines the programmed cooler
temperature set point (16°C by default) and the operation mode
DIFF (DIFFERENTIAL temperature mode by default). Other
available operation modes are F (FIXED temperature mode) and
B (BACKUP mode).
 In DIFFERENTIAL temperature mode, the cooler’s set point is
the ambient temperature, which is BioTector temperature, minus
the programmed set point. For instance, if BioTector
temperature is 20°C, the cooler set point temperature with
above default settings would be 4°C.
 In FIXED temperature mode, the cooler’s set point can be
programmed at a fixed temperature, e.g. 5°C.
 The BACKUP mode, which can also be programmed manually,
is automatically activated by the BioTector when a cooler fault
occurs. A “54_COOLER LOW TEMP” warning is logged in the
Fault Archive if the cooler temperature has been below 2°C for
more than 600 seconds. If the cooler temperature has been 5°C
greater than the cooler set point temperature and <8°C below
the ambient temperature for more than 600 seconds a
“55_COOLER HIGH TEMP” warning is logged.
 Note that the BACKUP mode is automatically cancelled when
the fault is acknowledged in Fault Archive menu.
BACKUP PWM 30%
 BACKUP PULSE WIDTH MODULATION (30% by default)
specifies the cooler control routine, which uses a PWM period of
10 seconds to achieve the programmed cooler temperature for
all cooler operation modes. For instance, with the default 30%
setting, the cooler is switched on for 3 seconds, and switched off
for 7 seconds.
 When a cooler fault occurs, the cooler operates in BACKUP
mode, where the cooler is controlled by the fixed PWM
operation. In the BACKUP mode operation, the COOLER
settings above and the temperature sensor information is
ignored.

Hach BioTector B7000 Specifications

General

Brand	Hach
Model	BioTector B7000
Category	Measuring Instruments
Language	English