86
MAN0604_Issue 09_02-2013
Apex
2110M8030
4. OPERATION
(15) Press
ok
.
The LCD screen displays the message:
Apply Gas then <OK>
(16) Connect the Flow Housing (using either gas pipe) to the regulated cylinder containing a
known concentration of the target gas at approximately the sensor alarm point, e.g. 50% LEL
Methane in air.
It is recommended for most
sticky
gases the tubing should be PTFE with short pieces of
rubber tube to make the final connection due to the inflexibility of PTFE. This minimises
adhesion of the gas to the tube surface and allows for more accurate measurement.
WARNING
As some test gases may be hazardous, the Flow Housing
outlet should exhaust to a safe area.
!
(17) Apply the target gas to the Certified Sensor.
Pass the gas through the flow housing at a rate of between 0.7l/m and 1.0l/m. Wait for the
gas reading to stabilise before continuing
Note: Certified Sensors should be calibrated at concentrations representative of those to be
measured. It is always recommended that the Certified Sensor is calibrated with the target
gas it is to detect.
Caution: Where the user calibrates any Certified Sensor
using a different gas, responsibility
for identifying and recording calibration rests with the user. Refer to the local
regulations where appropriate.
(18) Press
ok
.
The LCD screen displays the message:
Calibrating - Wait
(19) When calibration is successfully completed the message is displayed:
Success!
OK:Continue
Ensure that the sensor and the vicinity around it is clear all traces of the calibration gas before
continuing. This is to avoid triggering spurious alarms.
If calibration fails at any point discard the cartridge and replace with a new one
(see
Chapter 5
).
(20) Press
ok
.
The
Calibration Menu
is displayed.
(21) Press the
esc
button twice.
The
Main Menu
and then the
Gas Reading
screen is displayed.
(22) Remove the test equipment, refit the sensor cap to the sensor (with reinstalled filter if
previously removed for the test) and return the system to normal operation (see
4.2
).
