3-6
The active control mode setpoint remains constant, while the two inactive mode setpoints
vary under computer control with changes in measured temperatures and pressures.
Mode 2 (%RH @PcTc) is the most often used and is the power-up default mode of the
generator. The currently active mode is indicated on the display by an asterisk to the left of
the parameter. Also, when a setpoint change is initiated, the cursor always begins flashing on
the current control mode parameter.
To change the control mode:
A) Press [CHNG SETP] to enter the setpoint editing mode.
B) Position the cursor on the desired control parameter.
C) Change its value if needed.
D) With the cursor still on that parameter, press <ENTER>. The asterisk will then
appear next to the selected control mode parameter.
Any time that a setpoint editing session is terminated (by pressing <ENTER>),
AND
the
cursor is on one of the three control mode parameters, that control mode becomes active. If
the cursor is on a non-control mode parameter (i.e., FLOW xxx, SATUR °X, etc.), the current
control mode remains in effect. An altered setpoint for a non-active control parameter that is
not made the active control mode will not remain as a valid setpoint.
3.2.6
Run/Stop
When the [RUN] key is pressed, the temperature, pressure, and flow control processes begin.
The fluid circulation pump will start and if the system requires cooling, the refrigeration
compressor will energize. The [RUN] key then toggles to [STOP].
The 2500 will generate the values of humidity, temperature, and flow indicated in the
"SetPnt" column. Setpoints and units may be freely changed regardless of whether the
generator is RUNNING or STOPPED (reference section 3.2.3/3.2.4). The values in the
"Actual" column are the actual measured values, and begin updating every 1.5 seconds.
SetPnt Actual
%RH @Pc
50.25
50.26
*%RH @PcTc
50.00
50.01
SATUR Psi
24.23
24.20
CHMBR Psi
12.11
SATUR
o
C
25.00
25.00
CHMBR
o
C
25.13
FLOW l/m
20.00
19.74
08/10/12
12:40:04
CHNG
SETP
CHNG
UNIT
PRNT
OFF
STOP
