Parr Instrument 6200 - Manual (Page 12)

13
6200
Calorimeter Operating Instruction Manual
Filling the
Jacket
Reservoir
Power
Connection
Jacket
Cooling
Water
Connection
The 6200 Calorimeter is completely
assembled and given a thorough test before it
is shipped from the factory. If the user follows
these instructions, installation of the
calorimeter should be completed
with little or no difficulty. If the factory settings
are not disturbed, only minor adjustments will
be needed to adapt the calorimeter to
operating conditions in the user’s laboratory.
This apparatus is to be used indoors. It
requires at least 4 square feet of workspace
on a sturdy bench or table in a well-ventilated
area with convenient access to an electric
outlet, running water and a drain. The supply
voltage must be within ± 10% of marked
nominal voltage on the apparatus. The supply
voltage receptacle must have an earth ground
connection.
The water reservoir of the calorimeter must
be filled with approximately 1.4 liters of water
(distilled or de-ionized preferred). This must be
done prior to turning on the heater and the
pump. The reservoir is filled through
the tank fill elbow on the back of the
calorimeter. The tank is full once water
stands in the horizontal run of the filling
elbow.
Plug the power line into any grounded
outlet providing proper voltage that matches
the specification on the nameplate of the
calorimeter. The calorimeter will draw
approximately 300 watts of power. Grounding
is very important not only as a safety measure,
but also to ensure satisfactory controller
performance. If there is any question about
the reliability of the ground connection through
the power cord, run a separate earth ground
wire to the controller chassis.
Turn the power switch to the on
position. After a short time, the Parr
logo will appear on the LCD display
followed by a running description of the
instrument boot sequence. When the boot
sequence is complete, the calorimeter Main
Menu is displayed. Go to the Calorimeter
Operation page and turn the heater and pump
on. This begins circulating and heating the
calorimeter jacket water. Add water to the
filling elbow at the rear of the instrument as
required in order to keep it full.
It becomes necessary to use the jacket
cooling water connection only if the calorimeter
operating room temperature exceeds 24 °C
(75°F).
When required, an external water source is
used to cool the jacket of the 6200 Calorimeter.
This is done in either of the following ways:
1. Tap water is used for cooling and then run to a
drain.
2. Cooling water is re-circulated to the
calorimeter from a Parr water handling system.
The water that provides the cooling goes
through a heat exchanger and does not mix
with the water in the jacket and its reservoir.
There is a very low cooling load and tap water
up to a temperature of 27°C should be
adequate.
Tap Water Cooling
Connect the tap water supply
to the cold water inlet on the back
of the calorimeter using either ¼”
copper or nylon tubing
(HJ0025TB035). A 196VB metering valve is
provided with the calorimeter. This valve
should be installed in this inlet line near the
calorimeter. This valve is used to adjust the
flow of water to the heat exchanger to
compensate for differences in tap water
temperatures and water line pressures. Once
the calorimeter is operating at equilibrium,
check the jacket temperature that is displayed
on the operating page. If this temperature is
cycling significantly, close down on the
metering valve to reduce the flow of cooling
water. If the jacket rises above its 30 °C set
point, open this valve to increase the cooling.
A flow rate of 100 ml / minute is generally all
that is required.
2 INSTALLATION
2-1