Heath Consultants Detecto-Pak 4 (DP) User Manual

Page 25

peration

100786-0 Rev. D

05/09

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.