Thermo Scientific TSX Series Installation And Operation Manual page 33

Table 10: Service Parameters
Screen/Button
1 Initial Screen
2 Press Scan (
3 Press Scan (
4 Press Scan (
5 Press Scan (
6 Press Scan (
7 Press Scan (
8 Press Scan (
9 Press Scan (
Thermo Scientific
Display Function
SEr -20 Temp of unit
Varies CPU Checksum
Relay Board
Varies
Checksum
tyP Model Type
CFg Type of unit
)
CuFt Size of the unit
)
Control Probe
) Pd oFSt
Pulldown Offset
Control Probe
) Cnt oFSt
Offset
Display Probe
) diS oFSt
Offset
Control Upper
) Cnt ucl
Hysteresis
Control Lower
) Cnt lcl
Hysteresis
qUA Quality Mode
)
Summary
Allows the user to see what temperature the unit is
designed to run.
Shows the current checksum of the CPU board for
validation.
Shows the current checksum of the Relay board for
validation.
Unit type 20 for -20 Freezer. This parameter should
never be changed.
Type of unit (02). This parameter should never be
changed.
Setting for Size of the unit.
The difference in temperature between the control
probe value and the average compartment
temperature that determines when the control system
changes from pull down mode to steady state
operation. This can be useful to adjust if the average
compartment temperature has an undershoot or
overshoot relative to set point during pull down
mode. This offset is also used on some freezer
models as a response to door openings.
The difference in temperature between the control
probe value and the average compartment
temperature that is used to control the cooling system
to the unit set point during steady state operation.
This can be useful to adjust if there is a discrepancy
between the unit set point and the average cabinet
temperature.
The difference in temperature between the display
probe value seen on the User Interface display and
the average compartment temperature at the unit set
point during steady state operation. This can be
useful to adjust the display during unit calibration
procedures.
The degree increase in temperature from the set point
that will trigger the unit to begin cooling to prevent
the unit from getting too warm.
The degree decrease in temperature from the set point
that will trigger the unit to stop cooling to prevent the
unit from getting too cold.
Normally OFF(00). Used for production line testing.
TSX -20°C Laboratory and Enzyme Freezers
Operation
29