9
H
a
r
v
a
rd
A
p
p
a
ra
tu
s
N
L
S
1
1
0
P
P
re
s
s
u
re
P
u
m
p
www.harvardapparatus.com
Troubleshooting
PROBLEM:
The pump will not stop spinning when set to a non-zero
target pressure.
- There is a leak in the air pressure chamber.
- Tighten your connectors, and/or tighten the clamp arm of the peristaltic pump.
PROBLEM:
The MEASURED output is abnormal, even when all tubes are
disconnected.
- It is likely that liquid has entered the sensor and damaged it,
- There may be something else seriously wrong with the circuit board.