SEFRAM 9891 Manuel D'utilisation page 21

Détecteur de fuite de gaz réfrigérant
Approximately 12 hours normal use (alkaline battery).
Auto power OFF: 10 minutes
Disable Auto Power Off:
Press and Hold "SENSITIVITY button" then power on the meter.
When setting is completed, the buzzer will sounds twice.
Warm-Up Time: Approximately 45 seconds
Operating Temperature & Humidity:
0°C ~ 40 °C, < 80% RH
Storage Temperature & Humidity:
-10°C ~ 60 °C, < 70% RH
Altitude: < 2000M (6500')
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