GX-3R Operator’s Manual Appendix B: Gas Select Mode • 109
Stealth and Vibrator Settings (STEALTH)
STEALTH
ON:
• The instrument’s backlight does not come on, regardless of the BL TIME setting.
• The instrument’s LEDs do not come on for any reason, even alarm conditions.
• The instrument’s buzzer does not sound for any reason, even alarm conditions.
• An “S” appears at the top of the LCD.
OFF (factory setting): The instrument’s backlight and LEDs operate normally.
VIB
The VIB setting only affects instrument operation if STEALTH is set to ON.
ON: The vibrator activates for alarm conditions. It can be useful to have this feature turned on
if you have also turned STEALTH on.
OFF
(factory setting): The vibrator does not activate for any reason.
1 . While in Gas Select Mode, press AIR to scroll to STEALTH.
2 . Press and release POWER MODE. The current STEALTH setting flashes.
3 . Use AIR to display the desired setting.
4 . Press and release POWER MODE. The current VIB setting flashes.
5 . Use AIR to display the desired setting.
6 . Press and release POWER MODE to save the setting and return to the STEALTH menu
item.
7 . See “Exiting Gas Select Mode (START)” on page 111 to enter Measuring Mode.
LEL Definition (CHG LEL)
NOTE: If CH4_VOL is selected for the combustible gas sensor in the GAS COMB menu
item, the CHG LEL setting has no effect on operation.
The CHG LEL menu item defines what standard the instrument follows in determining the
LEL (lower explosive limit) for the combustible channel’s target gas.
STANDARD: Apply the standard settings for the lower explosive limit’s ppm level.
IEC: Apply the IEC settings (per IEC 60079-20-1 2010[ed1.0]) for the lower explosive limit’s
ppm level.
ISO: Apply the ISO settings (per ISO 10156 2017) for the lower explosive limit’s ppm level.
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