Comark C9501/IS - Manual (Page 11)

10
2. KEY FUNCTIONS
2.1 ON/OFF Key
Press once to switch on the instrument. Repeat to
switch off.
Holding down the key when switching on will display the
maximum pressure range of the instrument in PSI.
Holding down the key when switching off will display all
segments as a test.
2.2 ZERO Key
Press to zero the current readings on the display to nul-
lify any offsets caused by large temperature variations.
The instrument will retain the zero value in memory
even after switch off, so that the zero reading will be
displayed when the instrument is switched on again.
The zero key can be used whenever offsets occur.
Please note that pressing the zero key has no effect
whilst the instrument is in hold or record modes.
2.3 SCALE Key
Press to display the pressure measurement in each of
the different scales available. The selected scale unit
is retained in memory even after switch off, so that the
selected unit can be displayed when the instrument is
switched on again.
2.4 HOLD Key
Press to hold the displayed reading and press again to
resume measurement. The scale key will operate while
the instrument is in hold mode so that the held reading
can be displayed in different scales.
2.5 FILTER Key
Press to fi lter out transient readings. In fi lter mode the
instrument will average the readings taken over the
last 4 seconds (16 readings) to provide a more stable
reading on the display. Press the key again to resume
normal measurement.