YSI 2900 - Antiseptic; Flow Rate and Purge Time

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6.5.2 Flow Rate and Purge Time
The flow rate and purge time settings must be such that a sufficient volume of sample is pumped during each cycle to
completely purge the Monitor sample cup and system tubing. This is especially important when an antiseptic is used since
the antiseptic may damage the enzyme membrane if aspirated by the sipper.
The table below shows the flow rates and minimum time needed to purge the tubing lines from the solenoid valve to the
Monitor sample cup. These values are based upon a 6-fold volume turnover. Additional time may be necessary to purge
the line from the sample source to the solenoid valve. The volume of the supplied sample tubing is 5.1uL per inch.
Flow Rate
uL/min
Purge Time
Seconds
Flow Rate
uL/min
Purge Time
Seconds
100
900
1400
65
200
450
1500
60
300
300
1600
57
400
225
1700
53
500
180
1800
50
600
150
1900
48
700
129
2000
45
800
113
2100
43
900
101
2200
41
1000
90
2300
39
1100
82
2400
38
1200
75
2500
36
1300
69
Table 7-1
5. Touch the [Purge Time] button and enter the required purge time.
If you are using a filter on your sample line, make sure your Flow Rate does not exceed the maximum rated flow rate of
your filter. If necessary, touch the [Flow Rate] button and enter the correct flow rate.
6.5.3 Antiseptic
If you are not using an antiseptic solution:
6. Touch the [Antiseptic Cycle] button.