Instruction manual

6
Combustible Gas Sensor
All Sensit®Gold G2 instruments incorporate a highly sensitive
and uniquely designed semiconductor sensor. The function and
accuracy of the sensor are monitored and controlled by special-
ized circuitry and a microprocessor. This sensor is capable of
measuring concentrations of as low as 1ppm methane up to
100% LEL. When equipped with the percent volume sensor,
concentrations above 70% LEL are monitored or measured si-
multaneously with a state-of-the-art thermal conductivity sensor
(TC). This sensor is capable of measuring high concentrations
of gas quickly and accurately. All readings are automatically
switched between the scales of PPM (if so equipped), LEL and
percent volume.
Electrochemical Sensors (optional)
All Sensit®Gold G2 instruments when equipped with the fol-
lowing optional sensors, microprocessor and associated circuitry
will measure oxygen levels from 0-25%, measure carbon mon-
oxide (CO) levels from 0-2000ppm and measure hydrogen sul-
fide (H2S) levels from 0-100ppm. All gases are displayed simul-
taneously on the display.
The Pump
The Sensit®Gold G2 instruments are equipped with a powerful
and efficient rotary vane pump. A water/dirt filter at the end of
the gooseneck protects the pump from foreign material. An ad-
ditional internal filter also helps to protect the pump from dam-
aging debris. There are audible and visual indicators that will
show a blocked or improperly operating pump.
SENSOR TYPES AND PUMPS
(Continued on page 7)
7
BATTERY INSTALLATION/REPLACEMENT
A battery strength icon is located at the lower right corner of the
display which indicates the approximate battery capacity. Bat-
tery replacement is necessary when the display icon displays
an empty battery silhouette and flashes a countdown timer in
seconds indicating the maximum time before instrument shut
down. This timer begins at 300 seconds and decreases to 0.
During the low power indications the green LED will flash and a
warning beep will be sounded. Prior to shut down the display will
show BAT LOW in the main display.
CAUTION: Always change batteries in an environment
free of combustible gases.
Remove the battery sleeve cover by removing the retaining screw
(#10 Torx). Depressing the locking tab on the front of the handle
with a coin or flat object and pull the handle away from the top or
display area of the instrument.
NOTE: Observe the polarity markings on the inside of the
battery holder. Instrument will not operate with improp-
erly installed batteries.
Never mix batteries of different type or age.
Place three (3) approved batteries into the battery holder. For
best results hold the battery compartment so that it lays in one
of your hands. With your other hand slide the first battery with
the negative (-) contact toward the battery spring. Insert the
SENSOR TYPES AND PUMPS continued
NOTE: Operating the instrument without a sensor cap or
with an altered sensor cap can cause damage to the in-
strument and void the warranty.
(Continued on page 8)