Heath Consultants Hi Flow Sampler - Manual (Page 9)

Hi Flow

Sampler Operation
Instruction 0055-9017 9
2 Operation
2.1 Operating Precautions
To ensure that the gas sensors are properly zeroed at startup, the Hi Flow
 Sampler
must be turned ON in clean air (free of combustible gases or vapors).
Calibrate the instrument about every 30 days to assure its accuracy. The frequency of
calibration, however, may change depending on how often the instrument is used and
the amount of gas that was sampled. Create a maintenance log to keep track of when an
instrument was calibrated, and then use this log to help develop a calibration schedule.
For example, an instrument that fails its calibration after only being calibrated a single
time should be calibrated more often.
IMPORTANT: Avoid sampling leaded gasoline vapors, or gases or vapors that contain
silicones or sulfur compounds. Tetraethyl lead, silicones, and sulfur compounds can form
contaminating compounds on the sensor element (poison the sensor), with resulting loss
in sensitivity.
Always purge the instrument with clean air after testing. This removes combustibles
from the sensor chambers and prolongs the life of the sensors.
2.2 Battery Connection
WARNING: Explosion hazard! DO NOT connect or disconnect the battery in an unsafe
atmosphere.
The instrument’s power cord is located inside the backpack’s right-side pocket. Insert a
battery pack into this pocket and connect it to the power cord.
Figure 2-1. Battery Pack Connection