CAUTION!
Bursting of the external hydraulic circuit due to overpressure
Impact, cutting, frostbite
Lay hoses so that they do not kink.
Note the following:
n
Temperature control tubes: Always use the largest possible diameters
and shortest possible tube lengths in the external liquid circuit.
If the temperature control tube diameter is too small, a temperature
drop between device and external consumer occurs due to flow rate too
low. In this case, increase or lower the temperature accordingly.
n
Secure the temperature control tubes with hose clamps.
n
If the external consumer is at a higher level than the device, emptying of
the external volume can occur if the pump is stopped and there is
ingress of air in the external liquid circuit even for closed circuits. In this
case, there is the risk of the device overflowing.
n
In the event of hose rupture, cold liquid can escape and become a
danger for persons and material.
4.3 RS 232 interface
4.3.1 Cable and interface test RS 232
Computer
Thermostat
Signal
9-pin Sub-D female con-
nector
25-pin Sub-D female con-
nector
9-pin Sub-D female con-
nector
Signal
with hard-
ware hand-
shake
without
hardware
handshake
with hard-
ware hand-
shake
without
hardware
handshake
with hard-
ware hand-
shake
without
hardware
handshake
RxD
2
2
3
3
2
2
TxD
TxD
3
3
2
2
3
3
RxD
DTR
4
20
4
DSR
Signal
Ground
5
5
7
7
5
5
Signal
Ground
DSR
6
6
6
DTR
RTS
7
4
7
CTS
CTS
8
5
8
RTS
V05REV08
Microcool
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Summary of Contents for MC 250
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