Heath Consultants Detecto-Pak 4 (DP) - Manual (Page 25)

O
peration
100786-0 Rev. D 05/09
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Pressing the switch again will shut off the fuel flow to the detector
cell which will extinguish its’ flame. The instrument will then
automatically turn off.
8. RANGE LEDs: Blinking LEDs used to indicate the selected
ppm range.
9. EXTERNAL PRESSURE GAUGE CONNECTOR: Used to check the
internal regulator output pressure with an external pressure gauge.
10. SAMPLE INLET/FILTER HOLDER HOUSING: The hose from the
Sample Probe connects to the instrument at this location. A sample
filter is located within the filter holder housing and is easily changed by
manually unscrewing the filter holder housing from the instrument.
11. METER: Indicates the ppm concentration depending on which range
is selected and the battery level.
12. ALARM LED: Provides a visible indication of the ppm level
exceeding the alarm set point. The alarm led blinks in conjunction
with the pulsating audible alarm and both are enabled/disabled by the
signal alarm switch.
13. ZERO UP/DOWN SWITCH: These two switches provide fine meter
zeroing and are effective on the 10, 50, and 100 ppm ranges only. A
single press of either switch will shift the meter by approximately 1
meter division on the 10 ppm range (.2 ppm). Subsequent presses must
be at least 1 second apart as the switches also provide fast zeroing. Fast
zeroing is achieved by pressing and holding down either switch for at
least 1 second. For every second the switch is held down, the meter
zero will change by approximately 1 ppm. The audible alarm will
beep at every 1 second interval to verify fast zeroing. Single switch
presses and held switch pressed may be used in any order. Typically
the fast zero will be used first and then single switch presses will be
used to set the final meter zero. Fast zeroing will wrap around its range
if the switch is held down longer than 10 seconds. On power-up,
the fine zero position is automatically set to mid range.
14. BATTERY TEST SWITCH: Pressing and holding this switch will
indicate the charge level of the battery on the instrument meter. The
instrument should be operated only while the meter needle registers
in the green zone. Movement into the yellow or red zone indicates
that a complete recharge (10-12 hours minimum) is required.
**NOTE**
The instrument must be on to check the battery level.