NOTE To enable the H 2 S TWA alarm setting of 1.0 ppm, first enable the H 2 S decimal point as described above in Section 6.3 . The 1.6 ppm alarm value will then appear as an option in the TWA alarm setting for H 2 S. 6.6 Set cal gas Once the set cal gas submenu has been reached, the IQ Force will scroll through the various calibration gas values screens and the set default cal gas option. Click the MODE button once to advance through the screens. Hold the MODE button down to advance the counter fora specific calibration gas. To set default calibration gas levels, click the MODE button three times in rapid succession with Default Cal Gas displayed.
IQ Force™ Gas Detector Reference Manual 42 Set cal due Once the calibration gas values have been set correctly, click the MODE button three times in rapid succession to return to the main menu. 6.7 Set cal due Once the Set Cal Due sub menu is reached, the Cal Due screen will be shown. Hold the MODE button down to advance the counter. The number of days shown is the number of days that must pass following a successful calibration before the calibration due warning will be shown. The maximum length of time between calibrations is 180 days. To disable the calibration due warning, set the interval to 0 days. Once the calibration due interval has been set correctly, click the MODE button three times rapidly to return to the Main Menu.