Lauda PROLINE P 5 C, Operating Instructions Manual

Page: 78 / 120

78 / 123 Proline heating thermostat 02/2022

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 s)

Xpf lower, otherwise higher,

in case of bad thermal coupling and large thermal mass

high (i.e. 2 — 5, or even higher),

in case of good thermal coupling and small thermal mass

small (i.e. 0.2 — 0.7),

when rapid temperature response is required simple internal control should be preferred. Otherwise select very
small Xpf (0.05 — 0.1).
3. Setting the master controller (PIDT
1
-controller):

Start with setting Auto and proceed with Manual only when necessary.
3.1. Kpe setting:

Start with empirical values from table (

7.13.2.1).
 In case of oscillations (with large period, i.e.10 min)

Kpe higher, otherwise lower.
3.2. – Tne/ Tve/ Tde setting:
 Start with empirical values from table (

7.13.2.2) and with high numbers (Tne = 70 s — 200 s;
Tve = 50 s — 150 s),

with lower numbers

faster approach, otherwise slower approach with lower oscillations,

Tve: to reduce overshot

Tve higher, otherwise lower,

Tde (damping for Tve): in general approximately 10 % of Tve.
4. Correction limitation ( or outflow temperature limitation) (

7.13.2) and temperature limits (Til/ Tih) (

7.8.3)

make settings in accordance with the boundary conditions. Examples:
Heat transfer liquid Correction limitation Til Tih
Water
depending on the external vessel size and
the heat transfer liquid
2 °C 95 °C
Ethanol Minimum 40 °C
Tools to watch the time behavior:

Graph mode of the Command remote control,

LAUDA Wintherm PC-program.