Teledyne 2240 - Portable Handheld Hydrogen Leak Detector, 3rd generation (revision 2/29/08) - Manual (Page 17)

Handheld Hydrogen Leak Detector Startup and Operation
Teledyne Analytical Instruments 7
Figure 2-3: Unit Ready LED
2.4 Shutdown
To power-down the unit press and hold the ON/OFF button for
approximately 2 seconds until the Controller LCD display turns off.
2.5 Battery Level
After powering up the BATTERY LED indicates the current
battery level: (times may vary as battery ages)
• GREEN – more than one hour of operation remaining
• ORANGE – approximately 15 to 60 minutes of operation
remaining
• RED – less than approximately 15 minutes of operation
remaining
2.6 Normal Operation
During Normal Operation the instrument is detecting and reporting
hydrogen concentration near the Probe Tip Sensor. Hydrogen readings
are displayed on the Controller LCD as well as on the Probe Tip LED
bar graph array. Note that due to the extreme sensitivity of the sensor, it
may take more than one minute to return to a near zero (less than