Energizer PORTABLE GAS DETECTION INSTRUMENT - Manual (Page 20)

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This screen will remain on until the instrument detects calibration gas. If no
calibration gas is detected after thirty (30) seconds, the instrument will sound
a single beep and return to the operating mode.
Depressing the “EXIT” pushbutton will also return the instrument to normal
operation with no calibration having occurred. The last successful calibration
will remain valid.
To continue “SPAN CALIBRATION”, attach the 40014936 Calibration Adapter over
the sensor cap as shown in Figure 4.
FIGURE 4
CALIBRATION ADAPTER
TO GAS
CYLINDER