Detcon DM-200 - Manual (Page 18)

Model DM-200
DM-200 Instruction Manual Rev. 2.0 Page 14 of 40
a)
Verify the current calibration gas level setting as indicated by the programming status menu. To do
this, follow the instructions in Section 10 and make note of the setting found in listing number 7. The
item appears as “Auto Span Level / xx PPM”.
b)
If the calibration gas level setting is equal to your calibration span gas concentration, proceed to item
“f”. If not, adjust the calibration gas level setting so that it is equal to your calibration span gas
concentration, as instructed in items “c” through “e”.
c)
Enter the programming menu by holding the programming magnet stationary over “PGM 2” for 15
seconds until the display reads “View Program Status”, and then withdraw the magnet. At this point
you can scroll through the programming menu by momentarily waving the programming magnet over
“PGM 1” or “PGM 2”. The menu options are: View Program Status, Set Span Level, and Set Date.
d)
From the programming menu scroll to the calibration level listing. The menu item appears as: “Set
Span Level”. Enter the menu by holding the programming magnet stationary over “PGM 1” for 3
seconds until the display reads “Auto Span Level / ##PPM”, then withdraw the magnet. Use the
programming magnet to make an adjustment using “PGM 1” to increase or “PGM 2” to decrease the
display reading until the reading is equal to the desired calibration span gas concentration. To
accept/retain the newly entered value, hold the programming magnet over “PGM1” for 3 seconds.
NOTE: The newly entered span gas value is not saved to permanent memory until a span
calibration is successfully executed with it. New span gas values that are not saved to
permanent memory will be lost when power is lost.
e)
Exit back to normal operation by holding the programming magnet over “PGM 2” for 3 seconds, or
automatically return to normal operation in 30 seconds.
f)
From the calibration menu “1-Zero Cal 2-Span Cal” (section 3.4.1) proceed into the span adjust
function by holding the programming magnet stationary over “PGM 2” for 3 seconds then withdraw
the programming magnet. At this point the display will ask for the application of the target gas and
concentration. The display reads “Apply xxPPM Span Gas”. The ‘xx’ here will indicate the
concentration requested.