Extech Instruments CO80, Руководство пользователя

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CO80 V3.1 04/06 26
5.1.1. Standard Pressure Readings (Cont.)
Note: Only when a pressure has been “dropped” can it be logged into
memory.
Once the required pressure reading has been dropped, press and hold
“Log”
to save the report to memory. To print the report, follow the
procedures detailed in 4.6: Reports.
5.1.2. Tightness Test
The CO80 has been developed to conform with the UK document
“Tightness Testing and Purging of Domestic Sized Gas Installations”
(IGE/UP/1B). This includes the logging of pressure at the start and the
end of the test period, as well as recording the time periods in between.
To activate the Tightness Test, scroll into Display 4 and remove all
temperature probes. Press the “
Pressure
” key to calibrate the pressure to
ambient conditions and connect the CO80 to the meter or appliance that
requires pressure testing.
Press and hold the “
Clock
” key until the CO80 “beeps” - the counter is
now reset to 0 seconds and counting automatically starts in one second
intervals.
“P1”
is displayed at the bottom of the screen.
This display shows 1 minute and 3 seconds since the start of the test,
which is commenced by pressing and holding the ”
Pressure
” key.
Note:
The pressure timer is displayed as minutes : seconds e.g. 010 = 10
seconds; 201 = 2 minutes 01 seconds; 1159 = 11 minutes 59 seconds
Connect the silicon tubing to the Pressure (+) Inlet Port (see 2.7) and to
the test point on the meter. After turning the inlet valve off, the live
pressure should be displayed on the top of the display (in the example
below, 23.2 mbar).
Display alternates
between
”P1”
and
the “dropped”
pressure when
single pressure
reading is made