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

Page 20

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Startup and Operation

Model 2240

Teledyne Analytical Instruments

10

Figure 2-6: Peak Hydrogen Detected LED

2.7 Keypad

The keypad is used to alter the display or initiate special functions

as follows:

Pressing ▲

(up arrow button) will display the peak hydrogen

reading.

Pressing ▼ (down arrow button) will display the current
percent hydrogen concentration.

Pressing ► (right arrow button) will clear the peak hydrogen
value.

Pressing and holding ◄

(left arrow button) will invoke the

Zero Operation (see Section 2.10).

Pressing and holding ◄ ► (left and right arrow buttons
simultaneously) will invoke the Reset operation (see Section
2.9).

Pressing and holding the ENTER button will invoke the
Configuration Menu (see Section 2.11).

2.8 Controller LCD Error Status

The following Error Messages can appear on the display: