
48
MANUAL CALIBRATION
HYDROGEN SULFIDE (H2S) CALIBRATION (H2S 25 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 H2S 25ppm.
Apply 25ppm H2S/AIR to the instrument and press & release the TICK/
MENU BUTTON (B) to start H2S 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.