3-7
Pressing [STOP] causes the computer to perform a system shutdown and consists of the
following actions:
a) Pressure bleed solenoid valve opens.
b) Fluid circulation pump and refrigeration compressor stop.
c) Flow and Expansion valves close.
d) All control is disabled.
Once shutdown is completed the generator is left in an idle mode.
3.2.7 Printer (optional)
Reference Drawing 91D25915
An optional printer is used for hardcopy output of system data and other parameters. While
the 2500 humidity generator is operating, data is output on a timed interval basis when
activated by the user. User alterable printer parameters are explained in section 3.3.2.6. The
printer is connected using either a factory supplied or user made cable. Data will be printed
in the currently selected units.
The [PRNT OFF] key, when pressed, toggles to [PRNT ON] and causes measured system
data to be sent to the printer at regular time intervals (see section 3.3 to change default time
and other print parameters).
The [PRNT ON] key, when pressed, toggles to [PRNT OFF], disables printer output, and
sends a form feed command to the printer.
The <•> key, when pressed, immediately sends one line of system data to the printer
regardless of the PRNT ON/OFF status, and independent of print time interval.
Using this same procedure with a PC connected to the printer port instead of a printer, data
can be stored on the PC in a text file for later manipulation and printing. For instructions on
how to connect and use this option, refer to Section 4.2.5.
3.2.8 Power-Off
Power-Off refers to actually removing power and/or utilities from all or part of the humidity
generator. Before disconnecting primary power, a shutdown should be performed. If the
generator is currently RUNNING, press the [STOP] key.
If the generator is run on a daily basis, the system may be left idle with the power switch ON
so as to maintain the electronics at approximate operating temperature. If complete system
shutdown is to be performed, press the main rear panel Power switch to OFF. All functions
of the 2500 generator will shut off.
