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HAND UNIT FAMILIARISATION Q200 User Manual
6-2 200120/Revision 10
6.1
HAND UNIT KEYS
Each key on the hand unit performs a different function, a description of which follows:
Store: When pressed in sample mode the currently displayed reading is stored
in memory.
Zero: If this key is pressed in sample mode, the instrument will take the
reading at that instant as the new background reading. This will cause all ten
elements on the hand unit bar graph display to be extinguished; the audio to be
reset and the console display will read the minimum leak rate applicable to the
current instrument configuration. If pressed whilst the 'Reset Parameters Yes'
message is being displayed, then the instrument will reset all it's parameters to
their default values.
Peak Hold: When pressed, all subsequent readings will be subjected to the
Peak Hold function. This function monitors the peak (highest) reading taken
since the last zero was performed. When enabled the audio is still free running
enabling the leak site to be located. Pressing the
key a second time will
disable this function.
6.2 HAND UNIT INDICATORS
The hand unit of the instrument contains two indicators in the form of Light Emitting
Diodes (LED's).
6.2.1 WARNING LED
The Warning LED (
) is a red LED that will be illuminated when there is an
operational problem with the instrument, this will be accompanied by an audible
warning tone. See Appendix C for further details. It is also illuminated in program and
standby mode to indicate the instrument is not ready to use.
6.2.2 PEAK HOLD LED
The peak hold LED (
) is a green LED that will be illuminated whenever peak
hold is selected, and extinguished whenever peak hold is de-selected.
6.3
HAND UNIT BAR GRAPH DISPLAY
The hand unit on the instrument uses a ten segment LED bar graph to represent the
current leak rate with respect to the alarm or calibration level.
Midpoint equivalent to
the Alarm or Calibration level
Full Scale
Equivalent to 10x the
Alarm or Calibration Level