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TELEDYNE INSTRUMENTS
460L Instruction Manual Serial Communications
05228 Rev B 31
DCN 5164 PRINTED DOCUMENTS ARE UNCONTROLLED
7.3.3. CZERO
SYNTAX
<address>CZERO<CR>
DESCRIPTION
Performs a zero calibration using gas sourced from the ozone gas inlet.
DATA PARAMETERS SENT
None
RESPONSE
<address>:<success_flag>#<checksum><CR>
EXAMPLE
Command:
1CZERO<CR>
Response:
1:OK#261<CR> - Calibration Successful
1:FAIL#391<CR> - Calibration Failed
NOTE
Once the CZERO function is activated the monitor will briefly display dashes
(‘----‘) after which
the concentration should quickly go to zero.
The CZERO does not activate the zero-gas solenoid valve, therefore the gas flowing through the
monitor is sourced from the ozone inlet and the zero calibration is calculated based on the current
ozone content of that gas source.
Care must be taken to ensure that all ozone is purged from the monitor before activating the
CZERO function. Before activating the CZERO function, disconnect the O
3
supply line from the
monitor and allow room air to flow through the
monitor for several minutes.
Use a shutoff valve to make sure that the O
3
source does not continue to feed O
3
into the supply
line while it is disconnected