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SYSTEM LEAK TEST
This is a service command to check if the system is leaking. The oxygen must be connected and a vessel
must be in the well, lid closed. Activate the test (YES) and the CAL3K will pressurise the system to the
PRESS LEAK TEST, CMD=99 value. Then it monitors the pressure and displays it. During the test one can
try to find any leak if the pressure is declining. Stop the test with ESC.
Note that the filling is very fast because the volume (no =Vessel) is very small.
Replace the filling nut again. The filling nut is plastic and must be tighten by hand. Do not use tools and
do not 'cross thread' it.
20 PRINTING
The unit has a 'PRINTING' port: RS232 PORT D1.
To operate the RS232 port the speed of the CAL3K output must match that of the receiving input. The
receiving input can be:
1. PRINTER, with RS232 input
2. PC, with RS232 input
3. RS232 to USB converter
Whatever you connect to, the RS232 output speed must match the receiving input speed. The other
settings are:
Data
Parity
Stop bits
The following section refers to a print output initiated from the keyboard.
For other operations see:
20.1 PRINTING: SETTING THE PORT SPEED
The D1 port is a SERIAL RS232 port. The port D1 speed can be set with:
54
D1 PORT SPEED
20.2 PRINTING: SETTING A PRINTOUT FORM
The printer output comes in 8 forms, labelled A-H. Choose a printer output form by:
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SET OUTFORM A-H
It is possible that some output forms change in future. It is therefore advisable that you check the
output forms A-H for suitable data in a printable form. Use:
57
PRT TODAY FORM:
DDS CALORIMETERS OPERATIONS MANUAL V1.1
1
8 bit
NONE
1
PRINTING REAL TIME
PRINTING SOLICITED
0
0
0
2022
Digital Data Systems (Pty) Ltd.
CAL3K Advanced Bomb Calorimeters
www.ddscalorimeters.com
Website:
www.ddscalorimeters.com
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