Multichannel Systems PH01 Manual - Manual (Page 9)

PH01 Manual
7
2.4 Air Drafts and Ambient Temperature
 Ensure that the setup is shielded from air drafts. Even the smallest degree of turbulences in
the air — such as when a person walks by — can affect the PH01's temperature control and
thus the outlet liquid temperature as well.
 Ensure that the ambient temperature remains as constant as possible.
2.5 Pump Types
The differences between peristaltic and syringe pumps are shown here for comparison.
Both types of pumps deliver the same average outflow temperature (37 °C).
The offsets are 0.18 °C for the peristaltic pump and 0.35 °C for the syringe pump
(with a flow rate = 1000 μl/min).
The two illustrations below show typical long-term properties (20 min) for both pump types at
a flow rate of 1000 μl/min.
Temperature kinetics using a peristaltic pump
0 200 400 600 800 1000 1200
25
30
35
40
time [s]
tem
p
er
a
ture
[
°C
]
Temperature kinetics using a syringe pump
0 200 400 600 800 1000 1200
25
30
35
40
time [s]
te
m
p
er
at
ure
[
°C
]