Sample Pump - Hach BioTector B7000i User Manual

8.2.2 Sample Pump

SAMPLER FORWARD REVERSE
STREAM 1 100s
STREAM 2 100s
STREAM 3
........................
MANUAL 1
MANUAL 2
MANUAL 3
........................
CALIBRATION
SAMPLE FETCH REV
 BioTector Sample Pump runs forward for the FORWARD time to
60s 75s
bring a fresh sample from the STREAM, MANUAL and/or
60s 75s
CALIBRATION points to the Sample (ARS) Valve. This time
45s 60s
should be long enough to guarantee a fresh sample is injected
into the reactor and any old samples and bubbles are completely
50s 0s
removed from the sample lines.
 BioTector Sample Pump runs in reverse for the REVERSE time
so as to wash and empty the sample lines prior to the next
50s
reaction. The build up of dirt in sample lines is prevented by the
10s
self-cleaning technology, where the sample lines are washed
with the acidic liquid from the previous reaction in all systems
fitted with Cleaning Valve and if the Reverse Cleaning cycle is
activated.
approximately FORWARD time plus 15 seconds. See Section
8.1.1.4
operation times.
 The REVERSE time for a Manual Valve can only be activated if
a Manual Bypass Valve is installed in the system. Manual
Bypass Valve is used to return the previous sample and the
acidic cleaning liquid into drain.
 If a Sampler is programmed in Stream Program menu, system
automatically shows the Sampler time in this menu. The sampler
time should also be long enough to guarantee that the sampler
chamber is filled with fresh sample.
 When the user programs any SAMPLER, FORWARD and/or
REVERSE times, which exceeds the maximum allowable time,
BioTector generates the required INTERVAL time automatically
in the Reaction Time menu above. The maximum allowable time
is determined by the system from the System Program 1 settings
in System Program menu.
 SAMPLE FECTH REVERSE, if displayed in this menu, defines
the sample pump reverse operation time in seconds. When
programmed, sample pump runs in reverse direction for the
programmed time, just before the Sample Pump forward
operation, to empty the sample lines and to remove any possible
liquid or material sitting at the end of the sample tubing at the
sample source.
The recommended time
Sample Pump Test to test Sample Pump
for REVERSE is
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