PROGRAMMING OF VRAE
4 - 44
4. If the user wants to modify the LEL/VOL measurement
gas, press
[N/-]
key first, then use
[Y/+]
or
[N/-]
key to
scroll through a list of gas names until the desired gas
name appears in the LCD display, then press
[MODE]
key to select the new gas name.
5. The display shows “Save new gas?” To confirm the new
gas, press the
[Y/+]
key to accept the change. Press the
[N/-]
key or the
[MODE]
key to discard the change and
move to the next step.6. The display shows
Methane
LELFactor=1.00?
where “1.00” is the calculated correction factor of the
selected gas in Step 4. See Appendix B or Technical
Note 156 for the proper correction factor. Note that the
factors are not the same in the LEL-only and LEL/TC
sensors.
7. If the user does not want to modify the LEL correction
factor, press
[Y/+]
and go to Step 8. To modify this
factor, press
[N/-]
first. Then, starting from the left-most
digit, use the
[Y/+]
or
[N/-]
key to change the digit value
and press
[MODE]
momentarily to advance to the next
digit. The flashing digit will move on to next digit to its
right. Repeat this process until all 4 digits of the new
factor are entered. Press and hold
[MODE]
for 1 second
to exit data entry mode. If there is any change to the
existing value, the display shows “Save ?” Press
[Y/+]
to
accept the new value and exit the gas selection sub-menu.
Press
[N/-]
to discard the changes.
