Honeywell Impact, Operating Instructions And Maintenance Manual

Page: 14 / 84

Impact / Impact Pro / Impact Pro IR Operating Instructions 14
1�1 Intended Use
The Impact Series has been designed to alert the user to potentially hazardous
atmospheres while carrying out his/her normal duties. Therefore, the instrument
must be kept switched on and worn as close to the breathing area as possible, and
several accessories are provided to allow the instrument to be worn in a number
of different ways:
On the chest a)
On a belt b)
Attached to a body harness c)
The instrument is provided with various methods to enable the user to comply safely
and easily with confined space regulations.
CAutIoN
Hand aspirated remote sampling only provides continuous gas readings as long
as the bulb is being operated.
Honeywell Analytics recommends that the instrument be calibrated at least every
6 months or in accordance with customer site procedures, whichever is sooner.
Correct operation of the instrument should be confirmed with test gas of known
concentration before each use.
If equipped with an electrochemical CO
2
sensor, do not calibrate the CO
2
channel
if CO
2
is indicated in clean air after the apparatus has been exposed to CO
2
concentrations above the upper limit of the measuring range. In this case leave
the instrument in clean air overnight before calibration.
The calibration interval for the electrochemical CO
2
sensor shall not exceed 1
month.
The use of a Honeywell Analytics Enforcer calibration accessory is strongly
recommended as it enables this to be performed quickly and easily.
WARNING
A sensor which cannot be calibrated or which is found to be out of tolerance should
be replaced immediately. For the disposable cartridge, a replacement cartridge
must be fitted.