WatchGas NEO User Manual page 23

draw is displayed in the upper right corner. Briefly block the inlet probe with a finger and
to observe the rise in pump current value. Set the stall threshold about 50-100 units
above the unblocked pump reading, but lower than the blocked pump reading. Press
the Up or Mode key to increase or decrease each digit's value, and the Right or Left key
to move the cursor. Then move the cursor to '√' and press Up to save and exit. Set a
different pump stall threshold for each pump speed.
NOTE: For NEO Benz MP186, set the stall threshold with an opened (used) benzene tube
in the holder to avoid a stall alarm when a tube is inserted for benzene measurements.
5.8.4 ROLLING GRAPH
If the Rolling Graph function is enabled, the display in basic User Mode shows the
instantaneous reading together with a real-time plot of immediate past readings in a
2-minute window. Enable the rolling graph as with any other list selection menu.
5.8.5 REAL TIME DATA
Real time data output to a PC is available via a USB cable and/or wirelessly via Bluetooth
Low Energy using an Android App. Select 'On' in this menu and see Computer Interface
section below for procedures.
5.8.6 LANGUAGE
The display language can be selected as English, Simplified
Chinese, or Traditional Chinese. Choose the language as for
any other list selection menu.
5.8.7 SELF-ZEROING
With Self-Zeroing enabled, the instrument re-zeroes automatically if the signal drifts
below the last Zero Calibration for some time. Such drift can
occur 1) slowly as the lamp ages, 2) a dust or oil film
accumulates on the lamp window, or 3) a change in
environmental conditions such as background matrix gas,
humidity or temperature. The default setting of self-zeroing is off.
At the time of enabling self-zeroing, make sure the
instrument is running in clear environment for several minutes to
ensure that the baseline zero signal is well established. Enable
this function as with any other list selection menu.
5.8.8 TEMPERATURE UNIT
Select display temperatures in either °C or °F, including tube temperature for NEO Benzene.
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