7 AK Host Operation
28
•
If the system is occupied by executing a previous function, the new start of a control
command will lead to the response 'BS' (busy) in the data block of the response. The
running function will not be disturbed. Exception: The command was a software reset.
•
If the system is operated in manual operation mode, also the command 'remote' will be
responded with 'BS'. In this mode only read commands can be used. All control and write
commands will be responded with 'BS'.
•
If the data or parameters transfer is not complete (i.e. not expected format) in the
command telegram of the system, the host computer will get a 'SE' (Syntax Error) in the
data block of the response.
•
If the system doesn't work with data or parameters of the command (data error,
parameter error) the host computer will get a 'DF' (Data Failure) in the data block of the
response.
•
All setpoints set with write 'E' commands will be saved when testo CU-2 will be shut
down and they will be restored after rebooting and set to standby or measurement mode.
7.4.
List of All AK Commands
7.4.1.
Control Commands – 'S'
CODE:
description:
SREM
REMOTE – set system to AK host remote control mode
SMAN
MANUAL – disable remote control and set system to manual operation
SRES
RESET – reset all functions and restart system
SPAU
PAUSE – set system to pause state
STBY
STAND BY – set system to stand by state
SMGA
MEASURE – set system to STAND BY state
SNGA
ZERO TEST – start automatic PNC zero concentration test
SLEC
LEAK TEST – start automatic system (VPR+PNC) leak test
SINT
INTEGRATOR START – start integration, integral avarage
SINA
INTEGRATOR STOP – stop integration started with SINT
7.4.2.
Write Commands – 'E'
CODE:
description:
ENOR
set standard conditions temperature and pressure
ETD1
set PND1 temperature
range: 20...150°C
EVD1
set PND1 dilution factor
range: 15...300 (10 cav.) or 150...3000 (8 cav.)
EVD2
set PND2 dilution factor
range: 1...11
ETET
set ET temperature
range: 20...400°C
EDST
set PND1 diluter disk type and if secondary dilution PND2 shall be used or
7.4.3.
Read Commands – 'A'
CODE:
description:
ASTZ
STATUS – read the current operation mode and system state
ASTF
ERROR STATUS – read the numbers of all current failures
AKON
read the current diluted and undiluted particle number concentrations
APRF
read current particle concentration reduction factor PCRF
