01
06
02
07
03
08
04
09
05
10
a rate of 1-3 inches (2.5-7.5cm) per second.
3 Once the SCL2 indicates a change in concen-
tration (audible beep), note the spot on the
line and keep the tip moving past the potential
leak to refresh the air space within the SCL2
with clean air. (Note: If the SCL2 wand moves
through a very high concentration of refriger-
ant, you may need to use it in fresh air for 4
seconds before moving to step 4 in order to
clear the refrigerant within the SCL2.)
4 Return the tip back across the spot first in-
dicated. When the SCL2 indicates a second
change, note the spot on the line. The source
of the leak will be near the midpoint between
the two noted spots of indication.
5 Very high concentrations of refrigerant can
cause an overload which can take a few sec-
onds to clear.
Quick Start
1 Charge the SCL2 (see charging instructions
on page 14 for details).
2 Power on SCL2 and allow a 30 second warm
up to complete in well ventilated ambient air
away from suspected leak.
3 Select the sensitivity using the L/M/H button.
4 Point the tip of the wand at suspected leak
locations (see Find CO2 Leaks section on page
4 for details).
Quick Tips
1 Keep the wand tip moving slowly past sus-
pected leak locations.
2 Once a leak is detected, sweep the wand back
over to pinpoint.
3 To pinpoint larger leaks adjust sensitivity.
Certifications
C-Tick (N22675)
CE
WEEE
RoHS Compliant
Meets SAE Standard
Description
The SCL2 is a portable CO2 (R-744) leak
detector with a superior combination of
sensitivity, speed, sensor life, battery life,
portability, and ease of use.
Find leaks on commercial refrigeration
systems, restaurant soda machines, or any other
system using R-744. Pinpoint tiny leaks in high
concentration CO2 environments with ease.
Gas is pumped through the tip of the wand
into the sensor within the SCL2 body. The sensor
detects changes in concentration, not absolute
concentration, allowing the SCL2 to differentiate
CO2 concentrations higher than concentrations
normally found in ambient air.
The SCL2 detects leaks as small as 6 grams/
yr (0.2 oz/yr). The SCL2 has three sensitivity
settings to keep false triggering to a minimum.
A quick and automatic 30 second self-calibration
upon power-up ensures optimal performance.
The SCL2 comes with a wall and car charger
for its ultra-compact lithium-ion battery
which powers the SCL2 for 8hrs of continuous
operation before a recharge is needed. That's
long enough to last your entire workday.
A built-in replaceable filter blocks moisture
and harmful particulates.
Find CO2 Leaks
Keep the SCL2 away from any areas of
potential refrigerant leakage until the warm-up
and calibration period is over. The warm-up and
calibration sequence lasts about 30 seconds
after powered on. Allow the SCL2 to fully warm-
up before searching for CO2 leaks to avoid false
triggering. The meter defaults to high sensitivity.
The most likely points for refrigerant leaks
are at the soldered joints in refrigerant lines
and changes in the cross section or direction
of these lines.
The SCL2 detects changes in concentration of
CO2, not the absolute concentration. This helps
you to detect CO2 leaks in places that may have
lots of CO2, such as a refrigerator leaking into
an enclosed space. Because you are detecting
a change in concentration, you should use the
"double-pass" method detailed below.
1 The tip of the wand should be close to the line.
You may need to be within 1/4” (0.63cm) of
a small leak to detect it. In this case, using a
second hand to guide the tip along refrigerant
lines may be helpful. See Figure 1.
2 Keep the tip moving along refrigerant lines at
Fieldpiece
Carbon
Dioxide
Leak
Detector
OPERATOR'S
MANUAL
Model SCL2
Buttons
ON/OFF Protection
To turn on/off the SCL2 press and hold
SCL2
Carbon Dioxide
Leak Detector
SENSITIVITY
H
M
L
PEAK
LOW-BATT
PRESS FOR
1 SECOND
BATTERY
CHECK
ON/OFF
MUTE
PEAK
L/M/H
for one second. This slight delay protects against
your meter turning on when stored. If you forget
to turn it off it will turn off automatically in 10
minutes.
L/M/H Sensitivity
Set the sensitivity level by pressing
SCL2
Carbon Dioxide
Leak Detector
SENSITIVITY
H
M
L
PEAK
LOW-BATT
PRESS FOR
1 SECOND
BATTERY
CHECK
ON/OFF
MUTE
PEAK
L/M/H
. Low(L), medium(M),
or high(H) sensitivity will be indicated by their respective LED.
The higher the concentration of refrigerant in the ambient air,
the lower the sensitivity setting should be to minimize false trips.
Mute and Battery Check
Pressing
SCL2
Carbon Dioxide
Leak Detector
SENSITIVITY
H
M
L
PEAK
LOW-BATT
PRESS FOR
1 SECOND
BATTERY
CHECK
ON/OFF
MUTE
PEAK
L/M/H
toggles the sound of the SCL2
on and off. In addition, holding the MUTE button
for one second will display the remaining
percent of battery charge on the LED bar graph.
Peak Mode
To activate Peak mode, press
SCL2
Carbon Dioxide
Leak Detector
SENSITIVITY
H
M
L
PEAK
LOW-BATT
PRESS FOR
1 SECOND
BATTERY
CHECK
ON/OFF
MUTE
PEAK
L/M/H
. When
activated, the highest LED will stay lit when
gas is detected. The Peak function holds the
highest change in concentration sensed while
continuing to detect leaks. This is useful when
detecting around corners when the LED bar
graph is not visible. To deacviate, press PEAK
button again. The last peak measured will be
cleared.
Turbo Mode
The TURBO function is an additional 4th
sensitivity that pushes the SCL2 to it highest
possible sensitivity. This feature is activated by
pressing
SCL2
Carbon Dioxide
Leak Detector
SENSITIVITY
H
M
L
PEAK
LOW-BATT
PRESS FOR
1 SECOND
BATTERY
CHECK
ON/OFF
MUTE
PEAK
L/M/H
four times in succession, and can
only be activated while on the high(H) sensitivity
level.
When in TURBO mode the first green LED on
SCL2 will strobe, and the audio detection sound
will be a solid tone.
To exit the TURBO mode, press the PEAK
button again four times in succession, or switch
from high(H) to one of the other sensitivities
levels.
Beware: While in TURBO mode the SCL2 is
extremely sensitive and will more easily trigger
on abrupt or violent motions as well as very
small changes in refrigerant levels. Handle with
care when in TURBO mode.
LED Indicators
LED Bar Graph Display
The eight segment LED display indicates the degree of change
in refrigerant concentration. As the concentration of refrigerant
in the air increases, so does the number of lit bars on the display.
Low-Batt LED
1 While detector is in use, the Low-Batt LED will turn solid red
indicating approximately 1 hour of battery life left.
2 While detector is charging, the Low-Batt LED will flash red on
and off indicating the meter is charging.
3 When detector is fully charged, the Low-Batt LED will turn off
indicating the meter is fully charged.
H/M/L LEDs
High (red), medium (amber) , or low (green)
LED will turn solid indicating what sensitivity
is selected.
Peak LED
Light solid amber when Peak mode is
activated.
SCL2
Carbon Dioxide
Leak Detector
SENSITIVITY
H
M
L
PEAK
LOW-BATT
PRESS FOR
1 SECOND
BATTERY
CHECK
ON/OFF
MUTE
PEAK
L/M/H
SCL2
Carbon Dioxide
Leak Detector
SENSITIVITY
H
M
L
PEAK
LOW-BATT
PRESS FOR
1 SECOND
BATTERY
CHECK
ON/OFF
MUTE
PEAK
L/M/H
SCL2
Carbon Dioxide
Leak Detector
SENSITIVITY
H
M
L
PEAK
LOW-BATT
PRESS FOR
1 SECOND
BATTERY
CHECK
ON/OFF
MUTE
PEAK
L/M/H
!
WARNING
!
DO NOT operate the SCL2 in the presence
of gasoline, natural gas, propane, or in other
combustive atmospheres.
DO NOT use the SCL2 without the proper
filter correctly installed.
99 Washington Street
Melrose, MA 02176
Phone
781-665-
1400
Toll Free 1-800-517-8431
Visit us at www.T
estEquipmentDepot.com
