ENMET Formaldemeter htV - Manual (Page 7)

Formaldemeter htV ENMET Corporation
5
4.0 Operation of the PPM F
ORMALDEMETER
™ htV
4.1 Taking a Sample
Power on Press the O N -O FF button once.
The instrument will display:
flashing for 3 seconds as the instrument checks the sensor,
followed by: Indicating that the instrument is ready to take a sample.
Sampling Hold the instrument in the atmosphere to be sampled.
Press and release the
S AMPLE button.
The display will show and the internal pump should be heard
running for almost two seconds as it samples the air.
Display reading As the sample is analyzed:
The display will show flashing for 10 seconds.
The displayed will then show a flashing, increasing value as the sample is
analyzed. After 60 seconds, the display will show a non-flashing value, which is
held until the instrument is switched off. This indicates the formaldehyde
concentration in ppm.
Power off To Switch the instrument off press and Hold the O N -O FF button for a few
seconds, until the display reads followed by a click and the
instrument will turn off.
If you forget to switch the instrument off after a test, the Formaldemeter ™ htV
will automatically switch itself off after 5 minutes.
4.2 Sensor Recovery Period
Sensor clearing Between samples, the instrument should be left switched off for a few minutes to
allow the sensor to clear of any residual formaldehyde. Generally, the higher the
reading obtained, the longer it takes the sensor to clear. If the instrument is
switched on before the sensor has cleared, the display will show:
Flashing and the sampling pump will not operate.
The cell is clear only when the display shows:
For a minimum of 3 seconds after power on.
The instrument is now ready to take the next sample.