IEQ Chek
Operation Manual
1509-9001 Rev 1
21
Step 3-Point Span Procedure
3.
Enter the security code correctly and the LCD indicates
CAL
. Using the
DOWN ARROW scroll to
SPAN
and push the MENU button. The next
menu indicates installed gas sensors.
4.
The LCD indicates the list of installed sensors. Use the ARROW DOWN
button to scroll to the CO
2
sensor (or combustible sensor) and press the
MENU button again.
5.
The LCD moves to the
SPAN
menu and indicates
ENTER 1
ST
GAS
VALUE
. The cursor flashes over the first of four digits indicating the user
must set the correct 1
st
span gas value (approximately 1000 ppm). This
value must match the gas concentration on the cylinder of span gas for
that specific sensor, and then press the MENU button.
6.
The LCD indicates
APPLY GAS NOW…
.
A scroll bar at the bottom of the
LCD indicates the progress on a scale of 0 to 100% as the instrument
waits for sensor to stabilize to the span gas. Then the LCD indicates
SPANNING CO2
. Once again the scroll bar at the bottom of the LCD
indicates the span progress on a scale of 0 to 100%.
7.
Upon completion, the LCD indicates
ENTER 2
nd
GAS VALUE
and cursor
flashes over the first of four digits indicating the user must set the correct
2
nd
span gas value (approximately 2000 ppm). This value must match the
gas concentration on the cylinder of span gas for that specific sensor, and
then press the MENU button.
8.
The LCD indicates
APPLY GAS NOW…
.
A scroll bar at the bottom of the
LCD indicates the progress on a scale of 0 to 100% as the instrument
waits for sensor to stabilize to the span gas. Then the LCD indicates
SPANNING CO2
. Once again the scroll bar at the bottom of the LCD
indicates the span progress on a scale of 0 to 100%. Upon completion, the
LCD indicates
ENTER 3
rd
GAS VALUE
and cursor flashes over the first of
four digits indicating the user must set the correct 3rd span gas value
(approximately 4000 ppm). This value must match the gas concentration
on the cylinder of span gas for that specific sensor. Then, press the
MENU button.
9.
The LCD indicates
APPLY GAS NOW…
.
A scroll bar at the bottom of the
LCD indicates the progress on a scale of 0 to 100% as the instrument
waits for sensor to stabilize to the span gas. Then the LCD indicates
SPANNING CO2
. Once again the scroll bar at the bottom of the LCD
indicates the span progress on a scale of 0 to 100%. Upon completion, the
LCD indicates
SPAN HAS BEEN UPDATED
and returns to the CAL
menu.
NOTE
: If for any reason the user doesn’t want all three points’ calibration, any of the
points can be overridden by pressing and holding the ARROW UP button until the
next screen appears.
6.5. Calibration Process: 1-Point Span
NOTE:
This procedure is for all sensors
except
CO
2
.
