Calibration Procedure
While the ZGARD S & DS sensors are factory-
calibrated, the user must perform regular
calibration checks as part of a routine inspection
and maintenance schedule. Use calibration gases
of known and certified concentrations, and check
the expiration date on the gas cylinders.
The calibration procedure must be
completed after the replacement of
sensing cells; otherwise the unit could
fail to perform as designed and per-
sons who rely on this product for their
safety could sustain severe personal
injury or death.
Le procès de calibration doit être com-
plété lors du remplacement de cellules
du détecteur. Sinon, l’appareil peut
faire faillite qui augmente la possibilité
de causer des blessures corporels ou
la mortalité.
Calibration Equipment
•
Flow controller 0.25 liters/minute and tubing
•
Purified air as zero gas and Span Gas
(see TABLE )
SENSOR
SPAN VALUE
MSA GAS CYLINDER
TYPE
PART. NO.
Carbon Monoxide
60 ppm CO
710882
Nitrogen Dioxide
5 ppm NO2
710332
Combustible
2.5% CH4
10028032
Zero Air
20.8% O2 in Nitrogen
10028042
•
Calibration magnet (MSA P/N 30060-2)
•
Calibration cover (MSA P/N 10128624)
for S Sensor
•
Calibration cover (MSA P/N 10149017)
for DS Sensor
Remove the Calibration Cover after
calibration is complete; otherwise, the
unit could fail to perform as designed
and persons who rely on this product
for their safety could sustain severe
personal injury or death.
Enlever le couvercle du calibre seule-
ment une fois le procès de calibration
est terminé. Autrement, vous courez
chance de faillite de l’appareil et les
gens qui se fient sur cet appareil pour
leurs sécurité cours une chance de
blessures corporelles ou même la
mortalité.
Calibration Of ZGARD S & DS Sensors
NOTE: Slow Flash = 1 Flash per second
Fast Flash = 8 Flashes per second.
Zero Calibration
1. Apply Zero Air to sensor using
calibration cover.
2. Apply magnet to calibration target until
the Green LED slow flashes;
then,
remove
magnet.
3. Remove Zero Air when green LED is SOLID
ON (stops flashing)
4. Zero calibration is now complete
(time required is two minutes);
proceed to Span Calibration.
Span Calibration
1. Apply Span Gas to sensor using
calibration cover.
2. Apply magnet to calibration target until
the Green LED fast flashes; then,
remove magnet.
NOTE: Green LED slow flashes first.
3. Remove the Span Gas when the Green LED
is Solid ON.
4. Span calibration is now complete (time
required is two minutes).
•
There is a two-minute delay when the
Green LED stays ON.
NOTE: Upon completion of span calibration,
there is a two-minute delay before
sensor output returns. This time
allows for the span gas to dissipate,
preventing false indications from
the controller.
•
If magnet is left on for more than 16
"
WARNING
"
WARNING
"
ATTENTION!
"
ATTENTION!
4-1
Chapter 4,
Calibration
