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MANUAL CALIBRATION
HYDROGEN CYANIDE (HCN) CALIBRATION (HCN 10 PPM)
From the working display press & hold the TICK/MENU BUTTON (B)
until the top line reads USER MENU. Press & release the SAVE/ZERO
BUTTON (C) until the bottom line reads CAL.
Press & release the TICK/MENU BUTTON (B) once. The bottom line will
read AUTO CAL. Press & release the SAVE/ZERO BUTTON (C) until
the bottom line reads HCN 10ppm.
Apply 10ppm HCN/N2 to the instrument and press & release the
TICK/MENU BUTTON (B) to start HCN calibration. When the reading
is satisfactory, the display will flash DATA SAVED, indicating that
calibration is complete for that sensor.
The date for CAL PAST DUE is automatically reset for that sensor as
well. Scroll with the SAVE/ZERO BUTTON (C) if you need to calibrate
another sensor. When finished, remove and shut off the gas supply.
Press & release the POWER/MUTE BUTTON (A) to return to the
working display.