ECP2010
/
ECP2010H
62 / 68
flowrate, the difference between high and small peak reduces. They may merge in one peak. The
record course is also influenced by mobile phase and sample rate.
P
RESSURE
R
ECORD IN
E
COMAC
–
C
ORRECT
C
OURSE
P
re
ss
u
re
[
M
P
a]
2.0
2.5
3.0
Time [min]
0.65
0.70
0.75
Flowrate 1 ml/min, 95 % methanol with 5 % distilled water, compensation
OFF
Released Bubble
In the record is shown large dump of a sharp arrow, see below. After the bubble passes
through the system, signal returns to original line. Stuck bubble in the system is manifested by
pressure suppression to zero, even though pumping stil runs and liquid does not leave the unit.
P
RESSURE
R
ECORD IN
E
COMAC
–
B
UBBLE
P
re
ss
u
re
[
M
P
a]
11.0
11.5
12.0
12.5
13.0
Time [min]
20.2
20.3
20.4
20.5
20.6
20.7
Flowrate 1.1 ml/min, 50 % distilled water with 50 %methanol, compensation
LEARNED 1
Damaged Check Valves
In the record can be seen irregular dumps. In the record below, the dump was in 1.14 min,
1.52 min and 1.64 min. They occurred during the transition from peak recording the work of
