Teledyne 2240 - Portable Handheld Hydrogen Leak Detector, 3rd generation (revision 2/29/08) - Manual (Page 21)

Handheld Hydrogen Leak Detector Startup and Operation
Teledyne Analytical Instruments 11
Sensor Error – Unit has detected a failure to communicate with
the Probe.
broken – Unit has detected a unit internal failure
See Section 5.4 for troubleshooting
2.9 Reset Operation
The Reset Operation is used to speed recovery from hydrogen
exposure. This operation can be invoked from the keypad during Normal
Operation by Pressing and holding ◄ ► (left and right arrow buttons
simultaneously) or from the Configuration Menu (see Section 2.11).
Once invoked the user is asked to confirm the operation by pressing the
ENTER key, pressing any other key will abort the operation.
Note: The instrument must be in a hydrogen free environment
with the LCD indicating less than 0.1% hydrogen before
invoking the Reset operation.
During Reset the LCD indicates a countdown to completion and the
Probe tip LED will be yellow.
2.10 Zero Operation
The Zero Operation is used to zero the hydrogen reading if the
instrument is reporting low levels (0.001% to 0.01%) of hydrogen when
no hydrogen is present. This operation can be invoked from the keypad
during Normal Operation by pressing and holding ◄ (left arrow
button) or from the Configuration Menu (see Section 2.11). Once
invoked, the user is asked to confirm the operation by pressing the
ENTER key, pressing any other key will abort the operation.
Note: The instrument must be in a hydrogen free environment
with the LCD indicating less than 0.1% hydrogen before
invoking the Zero operation.
2.11 Configuration Menu
The Configuration Menu is used to display and modify instrument
settings and can be entered by pressing and holding the ENTER button.
The configuration parameters are summarized below with details in the