Heath Consultants Detecto Pak-Infrared (DP-I) - Manual (Page 14)

102105-0 DP-IR MANUAL REV M
Page 14 of 35
Using the Menu
The DP-IR menu allows the operator to adjust certain operational values or to turn on/off
additional functions.
The following functions can be turned on/off or enabled:
1. Self-Test
2. Backlight
3. RS232 or Bluetooth COM ports
4. Detection mode
The following menu screen modes are available:
• Survey – The normal run screen while surveying which shows the gas concentration in
real time. The user can zero and select measurement range from this screen mode.
• Alarm level – The user can set the threshold to which the alarm will sound and can
select the detection mode.
• Self-Test – The user can initiate the self-test routine.
• SEL – The user can turn the backlight on or off and can select RS-232 or Bluetooth
communication mode.
Each menu and function is further described in the proceeding sections:
Zero
The background level of methane can be zeroed out through the ZERO button when on the main
surveying screen. Zeroing only adjusts the background gas level to read zero:
• It does not calibrate the instrument
• It does not alter the alarm level
To perform the zero, the DP-IR must be at the main surveying screen. Press the ZERO button
momentarily until the display reads zero.
Auto/Manual Ranging
The operator can select if the instrument will automatically decide what range to display or if
only the selected range will be displayed.
By default on power up, the instrument is in the Auto Ranging mode. The ppm or % Gas icon
will be displayed on the right side to indicate the gas range.
To change the ranging mode (auto/manual) the DP-IR must be at the survey run screen.
1. Press the DOWN arrow key once to be in Manual (PPM or % gas) mode.
2. Press the DOWN arrow key again or multiple times and the mode switches between
PPM and % gas modes, but it always stays in manual ranging.
3. Pressing the UP arrow key will return to the Auto Ranging mode.