Detecting Leaks; Specifications - ThermoFisher Scientific GLD PRO Manuel D'utilisation

6.0 Detecting leaks

Slowly move the probe tip around fittings and other potential leak sources. If the leak
detector senses a gas other than air, the LED bar graph will begin to light, with more
lights indicating a more significant leak. On the 3rd red or 2nd yellow LED, an audible
tone will begin to beep. The more LEDs that illuminate, the faster the beep. When the
last red or yellow LED illuminates, the beep becomes a steady tone. The red LED lights
indicate a helium or hydrogen leak. The yellow LED lights indicate a nitrogen, argon, or
carbon dioxide leak. Remove the probe from the vicinity of the leak and allow the unit to
return to zero. If a large amount of gas has entered the probe, it may take a few seconds
for the instrument to clear itself. Do not attempt to zero the unit while it is clearing out
the gas from the probe. This may cause the unit to malfunction. Place the probe near
the leak again to confirm its location. The reference gas inlet (Figure 1) must not be
restricted or the unit will not operate correctly. Similarly, the exhaust port allows the gas
being tested to exit the leak detector and must remain unobstructed. The exhaust port is
located in the probe docking station.
CAUTION: This unit is designed to detect TRACE AMOUNTS of hydrogen arising
from a small leak in a nonflammable environment, e.g., laboratory
room air, etc. This unit is rated for use in a nonflammable atmosphere
where the sample gas may become sufficiently high in concentration to
become explosive.
NOTE:
To disable the audible beep during leak detection, depress and hold
the zero set button for 2–3 seconds. After you hear a steady tone for 1
second, release the button; the beep function is disabled. To turn the
beep function on again, depress and hold the zero set button. The beep
function is always enabled at power up.
NOTE: The leak detector will power down after 6 minutes of operation. This
feature prevents excess battery discharge if the unit is accidentally left on.

7.0 Specifications

Power Rating:
Battery Rating:
Operating Temp. Range:
Humidity Range:
Warranty:
Certifications:
Compliance:
Altitude:
Pollution degree:
Indoors Use Only
5 volts DC, 1 A (AC adaptor & USB charging cable supplied)
12 hours normal operation
50-98.6 °F (10-37 °C)
0–97%
1-year limited warranty
CE (EU, Korea, Japan, Australia) CSA/UL tested, not listed
WEEE, RoHS, China RoHS2
Up to 2000m above mean sea level
2
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