Extech Instruments CO80, Руководство пользователя

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CO80 V3.1 04/06 33
5.4.3. Changing a Security Coded Header
To change the top line of the header the four-digit code must be available.
If you do not have a security code please refer to 5.4.1. If the code has
been lost or forgotten please contact Extech Gas Monitoring.
To enable alteration of the user header top line, first press and hold the
“
Clock
” key until a beep is heard and the first time digit flashes. Select the
year fields and enter the code 7553 then move up to enter your security
code XXXX into the month field. Press the “
Scroll
” key to confirm. If the
code is valid a two-tone beep will sound and the top line of the header as
in 5.4.1 may now be changed.
The previous settings of the Time and Date are unaffected by these
changes, as an invalid year code means that changes are ignored.
5.5 Taking Carbon Monoxide Readings
The CO80 is able to pin point areas of CO leakage, as well as ambient
room levels in accordance to the forthcoming British standard, currently in
draft form as BS7967: Code of Practice for Measurement of Carbon
Monoxide and Carbon Dioxide in Buildings and from Gas-Fired Appliances
by use of Electronic Portable Combustion Gas Analysers.
5.5.1 CO Spot Leak Detection
Ensure that the unit is switched on whilst in outside ambient air and use
Display 1 or 3 to confirm that ambient CO levels are at 0. Connect the
sample probe to the CO80 (
see 2.7
) and move the probe slowly around
the appliance to find the exact source of CO or CO
2
leakage, using display
1 and/or 3.
5.5.2 CO Room Test Mode
Ensure that the unit is switched on whilst in outside ambient air. Follow the
appropriate procedures of BS7967, in accordance with the manufacturer's
instructions or with any Benchmark or similar codes of responsibility. Scroll
through the menus until Display 7 is on the screen.
Pressing & holding the “
Log
” starts
the CO room test. A reading is
taken every minute for 30 minutes.