6
test.
3.2 ZERO (used for inspecting whether gas pipeline is severely polluted)
Choose
ZERO
via Key-S, Key-▲ or Key-▼ and then press Key-E so that the
instrument opens air pump and reversing valve for 20-sec “Zeroing” (or reset). A prompt
appears on the screen: Zeroing, wait…19s(S: exit). It will automatically return to main
menu image at the end of 20-sec countdown.
If gas pipeline has been severely polluted, zeroing result of benchmark error will be
displayed at the top of screen (failure of benchmark voltage being too low resulted from
severe pollution). With the failure the instrument will not be able to start up test. Therefore
in this way gas pipeline must be cleaned.
3.3 CLS (namely reverse blowing)
For HPC400 instrument, users can connect the instrument with air compressor for
reverse blowing and sampling tube for reverse blowing cleaning. Its operation is: choose
CLS
via Key-S, Key-▲ or Key-▼and then press Key-E for 5-sec cleaning. In addition,
when failure of gas pipeline obstruction appears, choose
CLS
and press Key-E for
eliminating prompt “gas pipeline obstruction” on the screen.
3.4 ROLL (used for operation of installing PRTer scroll)
Choose
ROLL
via Key-S, Key-▲ or Key-▼ and then press Key-E for 5-sec ROLL
that will stop automatically at the end of 5 sec. When roll is started up,
STOP
is displayed
at the cursor, namely if, at the moment, pressing Key-E again roll would be stopped and
ROLL
is displayed again at the cursor.
3.5 SET
Choose
SET
via Key-S and then press Key-E, then the following SET menu will be
displayed on display screen: