resistance should be around 10K
Ω
1-21 1-22
Abrupt change in
heating rate or poor
temperature control
accuracy / The
temperature of the
block can not reach
the setting
temperature
Ventilation
Blocked
Clear the blockage
Bad
connection
Open the instrument; Check all the connectors are
connected properly.
Peltier failure
• Measure the resistance of the peltier, refer to Chapter
2.9.If resistance is beyond the range,
• Replace Peltier, as Chapter 2.7
Note:
It is not recommended that distributor replace the
peltier, because it is very difficult to control the temperature
accuracy and uniformity. A temperature acquisition device
is necessary for replacing peltier.
Resistance should be
around 0
1-23
Significant change in
cooling.
Temperature will not
cool to below
ambient.
Fan failed or
stopped
• Reconnect the connection wire of the fan,
• If still not good, remove screws, as 1-24
• Replace the fan. As Chapter 2.2
Notes
:
Please note the air flow direction of the fan and the
polarity of the connection wire when replacing the fans.
1-24 1-25
The screws of
the heat sink
is loose
Use Torque screwdriver to tighten the screw. Torque is
equal to 2.5kg.
Resistance should be <10
Ω
Peltier module
Hot lid sensor
Screws