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2) The cooling temperature regulating valve is used to adjust the tempera-
ture at which the refrigerant evaporates, which determines cooling effi-
ciency. Refer to the label below the gauge for approximate psi and
evaporative temperature settings. The following table is reproduced from
the label.
For this bath:
Control Temperature
°C
–10
–5
0
5
10
15
20
25
30
35
37
DO NOT set the Cooling Pressure above 90 PSIG
3) The cooling temp gauge is used to indicate the temperature at which the
refrigerant is evaporating. The cooling temp regulating valve is used to
set and then control this temperature.
7.3
Back Panel
The back panel has five standard features and two optional features (see
4): 1) the probe connector, 2) the stirrer power outlet, 3) the power cord, 4) the
drain valve, 5) serial number notation, 6) the RS-232 interface connecter (op-
tional), and 7) the IEEE-488 interface connector (optional). The system fuses
are internal.
1) The probe connector on the back panel is used for the temperature con-
troller probe.
2) The stirrer power is provided for the stirring motor.
3) The power cord.
4) A drain valve is provided for ease of removing the fluid media from the
bath. Always use a container of adequate size to hold the FULL LOAD
of fluid. Some oils are more easily drained at higher temperatures. (See
caution note in next section.)
Set the Cooling Temp. Valve to this pressure
°F
Nominal Cooling PSIG
14
4.7
23
9.2
32
14.5
41
20.7
50
27.9
59
36.1
68
45.5
77
56.2
86
68.4
95
82.1
98.6
86
7 Parts and Controls
Back Panel
Figure
23
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