Thunder Scientific 5A-1MP, Owner'S Operation And Maintenance Manual

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FLOW
SET
1
0 0
.
0
ENTER
This number only remains valid until changed again from either the keypad, the IEEE 488,
or the serial interface, or a cold reset is performed. (Refer to Section 3.2.1, Power-Up).
Also, anytime the unit is aspirated by enabling the internal blower motor, the flow rate
entered is ignored and all calculations are performed utilizing a preset flow rate determined
during factory calibration. If probe aspiration is always accomplished with the internal
blower, the flow rate need not be altered from its power-up default value. The flow rate may
also be set from either the RS-232 or IEEE 488 interface. (Refer to
FLOW command,
Section 7).
3.2.7 Enabling/Disabling the Blower
Pressing the
BLWR
ON
OFF
key enables and disables the blower motor within the probe. When
enabled, the leftmost dot of the lower LED display will illuminate. The blower should be
enabled for at least 30 seconds to 1 minute prior to taking readings in order to allow the
system to stabilize. After the desired readings have been taken, disable the blower by
pressing the same key again. The blower may also be controlled from either the RS-232 or
IEEE 488 interface. (Refer to
BLOW er command, Section 7). Note that there is a normal
1 to 2 second delay associated with blower turnoff.
3.2.8 Enabling/Disabling the Printer
If a printer is connected to the psychrometer. (Refer to Section 2.3, Computer/Printer
Interfacing), current printouts of all relevant psychrometric data is available.
To enable the printer,
press the
PRINT
ON
OFF
key on the keypad. The second dot from the left on the lower display
will illuminate, and data will then be printed at the specified time intervals. (Refer to Section
3.2.12, Changing the Time Interval). Pressing the key again disables the printer.
The
PRINT
NOW
key may be used at any time to immediately send one line of data to the
printer.
The start of each page is preceded with a header and the end of each page is appended with
a formfeed (or top of form), provided that headers and formfeeds are enabled. (Refer to
Section 3.2.13, Printer Options). The printer may also be controlled from either the RS-232
or IEEE 488 interface. (Refer to
PRIN ter command, Section 7).