Teledyne 2240 – Portable Handheld Hydrogen Leak Detector, 3rd generation (updated 1/31/11) - Manual (Page 19)

Handheld Hydrogen Leak Detector Model 2240
Teledyne Analytical Instruments Page 19 of 30
5. Keypad
5.1 Numerical Changes
In the following sections when queried to change a
numeric value the
▲ (up arrow) and ▼ (down arrow) keys
are used to increment/decrement the value based on the
selected digit. If the ones digit is selected the value will
increment/decrement by one (9 increments to 10, 10
decrements to 9). The
◄ (left arrow) and ► (right arrow)
keys are used to select another digit. To change a value of
0 to 100 first select the hundreds digit then press the
▲ up
arrow. Pressing ◄► (the left and right arrows
simultaneously) will clear any changes made and restore
the previous value. Once the correct value is displayed
press the ENTER key to save it.
5.2 Top Level Keypad Functions
While in the hydrogen measurement screen, the keypad
has these functions:
Key Function
ENTER Go to the Information Display menu .
▲ Display the peak hydrogen reading.
▼ Display the current hydrogen concentration.
►
Clear the peak hydrogen value.
◄
Zero the sensor (see Section 4.7).
◄► Reset the sensor (see Section 4.6).