Proline Low-temperature Thermostats
90 Starting up YACE0072 / 21.08.07
7.13.2.1 Proven settings for control parameters (External measurement probe):
External vessel
Master controller
(External controller)
Slave
controller
(Internal
controller)
Instru-
ment
Type
Heat
carrier
liquid
Description Volu-
me
[L]
Hose-
lenght
[m]
Kpe
DO
Tne
Dl
Tve
Ds
Tde
Dc
Prop_E
Da
Xpf
hO
Pump
Level
RP 845 Water
double wall glass vessel 2,5 2x1
2.0 80 60 5.0 30 4.0 5
RP 855 Water
double wall glass vessel 2,5
2x1
2.0 150 130 5.0 30 3.0 5
RP 855 Water
double wall stainless
steel vessel with water
0,7
2x1
0.5 70 50 5.0 30 3.0 5
RP 855 Ethanol
double wall glass vessel 2,5
2x1
2.0 150 122 15.0 30 3.0 5
RP 855 Ethanol
double wall glass vessel 2,5
2x1
2.0 150 120 15.0 30 3.0 5
RP 855 Ethanol
double wall glass vessel 2,5
2x1
2.0 125 107 15.0 30 3.0 5
Technical alterations reserved!
7.13.2.2 Steps for setting the control parameters for external control
1. Activate external control Ì 7.7.4.
2.
Setting the slave controller:
2.1. Set parameters to auto ; Xpf see table Ì 7.13.2.1 (experienced data) depending on:
− Check for thermostat type and change when necessary (RP....) Ì 9.2.1,
− Choose heat carrier liquid with low viscosity and high thermal capacity.
Ranking: water, ethanol, water-glycol, oil, Fluorinert®.
− Set pump level as high as possible,
− make bath circulation strong and fast,
− choose hose length as short as possible, i.e. 2 x 1m,
− choose hose cross section as large as possible, i.e. ½ inch,
− throughput through the external load as large as possible.
2.2. Xpf setting:
− when oscillating with short period occur (i.e. 30 seconds) Î Xpf lower, otherwise higher,
− in case of bad thermal coupling and large thermal mass Î high (i.e. 2...5, or even higher),
− in case of good thermal coupling and small thermal mass Î low (i.e. 0.2 ... 0.7),
− when rapid temperature response is required simple internal control should be preferred.
Otherwise select small Xpf (0.05 ... 0.1).
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