JULABO HT60-M3 High Temperature Circulator - Manual (Page 5)

HT60-M2 / HT60-M3
5
Operating manual
1. Intended use
The High Temperature Circulators HT60-M2 and HT60-M3 are to be employed especially for closed tempering
circuits in the laboratory, the technical institution or the production, like e.g. for distillation plants, reaction vessels,
autoclaves, injection moulding tools.
JULABO circulators are not suitable for direct temperature control of foods, semi-luxury foods
and tobacco, or pharmaceutical and medical products. Direct temperature control means
unprotected contact of the object with the bath medium (bath fluid).
1.1. Description
The structure of the
High Temperature Circulator HT60 is sub-divided in three zones:
• The cold zone (on top) with the electronics for controlling and monitoring, the temperature control and the
pump motor.
• The cooling zone with the cooling coil, the float for the level indication, a temperature sensor for monitoring
the temperature, the connection for inert-gas, the connection for the expansion vessel as well as an overflow
nozzle. At this place the temperature monitoring is independant from the other safety devices.
• The heating zone (down) with the heating element, the pump, the temperature sensors and the flow nozzle
The
C.U.-cooling unit can be installed firmly and fulfills two tasks.
• The temperature of the tempering liquid in the cooling zone is supervised. If it is necessary the cooling water
is led through the integrated cooling coil in order to reduce the temperature (without C.U.-cooling unit the
cooling coil can be connected directly to the cooling water).
• With a separate cooling circuit through the C.U.-cooling unit a rapid cooling of the tempering liquid becomes
possible.
The
M2 or M3 control electronics is connected to the HT60-circulator via a control cable.
• The local operation of the control electronics M2 / M3 is effected via a splash-water protected keypad. The
Microprocessor technology allows to set three different temperature values, to store and to indicate them via
the digital display LCD – the working temperature and the values for the excess and lower temperature
warning functions.
• With the integrated programmer the instructions for setpoint and time for six different temperature profiles
can be stored and called in.
• Via an analog interface REG+E-PROG an analog programmer can be connected for the setpoint.
• At the same time this interface is provided with three analog outputs for the recorder. For the best resolution
the output settings can be adjusted via the menu delete surface - should just be Menu.
The remote control via the digital RS232/RS485 interface according to NAMUR allows the most modern
process technology without additional interface.
• The excess temperature protection is a safety equipment which does not depend on the control circle. Its
safety value is shown and can be adjusted by the MULTI-DISPLAY (LED).
• The level of liquid is acquired in the cooling zone, indicated to the control electronics via the control cable.
There they are made visible by an 8-grade level indication.