yellow jacket EVac I User manual
INTRODUCTION
Thank you for your purchase of the YELLOW JACKET
®
EVac I Digital Vacuum Gauge
Utilizing patented technology, the EVac I is the most accurate vacuum gauge available.
With the EVac I , you can accurately measure vacuum pressure in Microns, Pascals,
Millibar, Millitorr, and mmHg with a resolution of 1 micron. Ideal for the HVAC/R
professional, the EVac I is small, lightweight, rugged and easy to use.
FEATURES
•Large, high-visibility back-lit LCD display
• Measures Vacuum in Microns, Pascals, Millibar, Millitorr and mmHg
• 0 to 25,000 Micron Range with 1 Micron Resolution
• “Analog” Vacuum Level Bar Graph
• Automatic Oil Sensor
• Built-in memory retains all previous settings
• Rugged, Compact Design – Aboutthe Size of a Manifold Gauge
•Long Battery Life
• Calibration Self Test -- Can be field calibrated with no special equipment
• Idealfor HVAC/R Service andIndustrial Use
SPECIFICATIONS
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Vacuum Accuracy: 5% of Reading +/- 5 Microns
Vacuum Resolution: 1 Micron
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Warm-up Time: Instant
Response Time: Instant
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Battery Life: Up to 300 Hours
Operating Temperature: 10°F – 122°F (-12°C – 50°C)
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Dimensions: 3.5” x 3” x 1.25” (9cm x 7.5cm x 3cm)
Warning: To avoid personal injury and to prevent damage to the EVac I Digital
Vacuum Gauge, never exceed 500 PSI.
PARTS DIAGRAM
LCD DISPLAY
Item Function
A Main Numeric Display
B Alternate Numeric Display
C “Analog” Vacuum Level Bar Graph
BacklightIndicator. Flashing: Temporary, Solid: Always On
Sound Indicator
Battery Level Indicator
Oil Sensor Indicator
Calibration Mode Indicator
Indicates that Temperature is Displayed on the Alternate Numeric Display (during
calibration)
Indicates degrees Celsius on the Alternate Numeric Display (during calibration)
Pascal Units Indicator
Millibar Units Indicator
Millitorr Units Indicator
Millimeters of Mercury Units Indicator
Micron Units Indicator
Indicates that Temperature is Displayed on the Alternate Numeric Display (during
Indicates degrees Celsius on the Alternate Numeric Display (during calibration)
KEYPAD
QUICK START
To operate the EVac I as a basic vacuum gauge:
1. Install the battery as described in the “Battery Installation” section below.
2. Turn the power on by pressing . The display will show
to indicate pressure
greater than 25,000 Microns.
3. Select the desired units by repeatedly pressing .
4. Attach the EVac I to the sy
stem to be evacuated with a high quality vacuum hose. Start the
vacuum pump. Read the vacuum level from the Main Display.
5. Turn the power off by pressing and holding .
BATTERY INSTALLATION & REPLACEMENT
1. Remove the battery cover from the rear of the EVac I
by compressing tab at the base of the
battery cover.
2. If necessary, remove and detach old battery from battery clip.
3.
Attach battery clipto new battery and insert into battery compartment. Replace battery cover by
by aligning tab and snapping back into place.
IMPORTANT: TO PREVENT DAMAGE FROM LEAKING BATTERIES, DO NOT LEAVE A DEAD
BATTERY INSIDE THE EVac I . REMOVE BATTERY IF THE EVac I
IS NOT TO BE USED FOR AN
AN EXTENDED PERIOD OF TIME.
BATTERY LEVEL INDICATOR
The battery level indicator shows the relative
strength of the battery. Four bars indicate full power.
As the battery is depleted,the number of bars displayed decreases, until no bars are left. At this
Item Function
Press to Turn Power On, Press and Hold to Turn Power Off
Press to Change Display Units
Press and Release to Activate Backlight
Press and Hold to Mute/Un-mute Sound
to indicate pressure
stem to be evacuated with a high quality vacuum hose. Start the
by compressing tab at the base of the
Attach battery cliptonewbattery and insert into battery compartment. Replace battery cover
IMPORTANT: TO PREVENT DAMAGE FROM LEAKING BATTERIES, DO NOT LEAVE A DEAD
IS NOT TO BE USED FOR
strength of the battery. Fourbars indicate full power.
As the battery is depleted,the number of bars displayed decreases, until no bars are left. At this
point, it is necessary to replace the batteries (refer to the Battery Installation section above)
If the battery power dropsto the point where the EVac I
can no longer function accurately, the alarm will
the alarm will beep 10 times and the power will turn off automatically. When the battery is
replaced, and the EVac I is turned back on, the EVac I will resume operation with all previous
settings intact.
HI-PRESSURE INDICATION
If the sensed vacuum pressure exceeds 25,000 Microns (3333.1 Pa, 33.331 mBar, 25,000 mTorr, or
mTorr, or25.000 mmHg), the display will show .
SLEEP MODE
Unlike other Digital Vacuum Gauges, the EVac I
helps to conserve battery life through advanced
power management. After 5 minutes of displaying , the EVac I
will enter “Sleep Mode” in
in which the sensor and backlight are turned off, thus reducing the load on the battery and extending the
extending the battery life up to 300 hours or more. While in this mode, the display will show
. Approximately every 35 seconds, the gauge will automatically check the pressure
AUTO POWER-OFF
After 1 hour in “Sleep Mode”the EVac I
will automatically turn itself off to further conserve battery
battery power.
OIL SENSOR
It is necessary to prevent oil from being drawn into the Vacuum Sensor. For HVAC/R service, always
always recover refrigerant prior to attaching gauge. If possible, always close the blank
-
on the vacuum pump prior toturning the vacuum pump off. Over time, oil vapor and other
materials may contaminate the sensor. The EVac I
has a built in Oil Sensor that will detect this condition. If the
condition. If the OIL indicator in the display illuminates, this is an indication that the vacuum
sensor has been contaminated and is no longer functioning accurately. If the sensor becomes
completely saturated with oil to the extent that it cannot function properly at all, the message
will show on the display. Prior to further use of the EVac I, clean the sensor as
described in the “Cleaning the Vacuum Sensor” section.
UNITS
Change the displayed units by pressing the
key on the keypad. The appropriate units indicator
indicator on the LCD display will show Pa, mBar, mTorr, mmHg, or Microns depending on
the units set.
point, it is necessary to replace the batteries (refer to the Battery Installation section above)
can no longer function accurately,
If the sensed vacuum pressure exceeds25,000 Microns (3333.1 Pa, 33.331 mBar, 25,000
helps to conserve battery life through advanced
will enter “Sleep Mode”
which the sensor and backlight are turned off, thus reducing the load on the babattery and
will automatically turn itself off to further conserve
It is necessary to prevent oil from being drawn into the Vacuum Sensor. For HVAC/R service,
-
off valve
has a built in Oil Sensor that will detect this
ator on the display illuminates, this is an indicat
key on the keypad. The appropriate units
and exit Sleep Mode if the pressure is less than 25,000 Microns. The gauge can be manually
brought out of Sleep Mode by pressing any key on the keypad. While in Sleep, the gauge will
beep twice every 5 minutes to remind you that it is on. The EVac I will not sleep in the
Calibration Mode (see the Calibration section below).
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RANGE AND RESOLUTION
The EVac I has a broad vacuum pressure measurement range and very high resolution
according to the table below:
Vacuum
Range Resolution
Pascals (Pa) 0 —3,333.1 0.1 Pa
Millibar (mBar) 0 —33.331 0.001 mBar
Millitorr (mTorr) 0 —25,000 1 mTorr
mmHg (mmHg) 0 —25.000 0.001 mmHg
Microns (Microns) 0 —25,000 1 Micron
“ANALOG” VACUUM LEVEL BAR GRAPH
The EVac I also displays a Vacuum Level Bar Graph allowing for a quick visual determination
of the vacuum level achieved. Each bar correspondsto a vacuum pressure range depending
on units according to the following table:
Units
Bar
Value Microns Pa Millibar Millitorr mmHg
10K 10,000 — ATM 1,000 — ATM 10 — ATM 10,000 — ATM 10 — ATM
5K 5,000 — 10,000 500 — 1,000 5 — 10 5,000 — 10,000 5 — 10
2K 2,000 — 5,000 200 — 500 2 — 5 2,000 — 5,000 2 — 5
1K 1,000 — 2,000 100 — 200 1 — 2 1,000 — 2,000 1 — 2
500 500 — 1,000 50 — 100 0.5 — 1 500 — 1,000 0.5 — 1
200 200 — 500 20 — 50 0.2 — 0.5 200 — 500 0.2 — 0.5
100 100 — 200 10 — 20 0.1 — 0.2 100 — 200 0.1 — 0.2
50 50 — 100 5 — 10 0.05 — 0.1 50 — 100 0.05 — 0.1
20 20 — 50 2 — 5 0.02 — 0.05 20 — 50 0.02 — 0.05
10 10 — 20 1 — 2 0.01 — 0.02 10 — 20 0.01 — 0.02
BACKLIGHT
To activate the Backlight temporarily, press once. The indica
tor on the display will flash,
and the backlight will turn off automatically after 1 minute. To activate the Backlight permanently,
press again. The
indicator on the display will show solid. Turn off the backlight by pressing
repeatedly until the
indicator turns off.During Sleep Mode,the backlight will turn off to help
conserve battery power, but will turn on again automatically upon resumption of normal operation if it
was previously set in the permanent-on mode.
SOUND
The EVac I has an i
nternal speaker that will emit a beepfor each valid key press, and also functions
as an alarm in the Calibration mode (see the Calibration section below). It will also beep every 5
minutes in Sleep Mode. For silent operation, the sound can be muted by p
ressing and holding the
key. The Calibration mode alarm is not affected by the mute status. The
indicator on the LCD
display indicates thatthe sound is on (not muted).
SWIVEL HOOK
The EVac I’s removable stainless steel swivel hook enables hanging o
f the gauge and will allow it to
swivel freely in any direction. The gauge may be operated with or without the hook attached. When
fastening the hookto the gauge, turn it finger tight only. Use of a tool totighten the hook may result in
damageto the EVac I case.
MAINTENANCE
The EVac I
should provide many years of service with no maintenance required. When not in use, the
dust cap should remain in place over the sensor port. Clean the plastic enclosure with a damp (not
wet) rag. Mild detergent is acce
ptable, but use no solvents. Take care not to expose the vacuum
sensor to oil. If the Oil Sensor (described above) indicates a contaminated sensor, follow the Sensor
Cleaning Procedure below.
CLEANING THE VACUUM SENSOR
If the vacuum sensor becomes cont
aminated with oil (as indicated by the Oil Sensor), carefully follow
this procedure:
1. Turn the EVac I power off.
2. Shake the gauge to remove any large quantities of oil from the sensor.
3. Apply a few drops of rubbing alcohol inside the sensor vacuum port. (DO
OBJECT INTO THE PORT, AS THIS WILL PERMANENTLY DAMAGE THE SENSOR
4. Place yourfinger over the port and shake for a few moments.
5. Remove your finger and shake out the alcohol.
6. Repeat steps (3) – (5) at least three times.
7. Allow the sensor to a
ir dry over at least an hour, or pull a vacuum on the sensor to clean it more
quickly.
8.
Replace the battery andturn on the gauge. The Oil Indicator should be off. If it is still on, repeat
the cleaning procedure.
9. If full accuracy is desired, perform a c
alibration cycle as detailed in the Calibration section below.
Note
: It is important to remove all alcohol vapors from the sensor, eitherthrough air
vacuum. Any remaining vapors will cause an incorrect vacuum reading.
tor on the display will flash,
and the backlight will turn off automatically after 1 minute. To activate the Backlight permanently,
indicator on the display will show solid. Turn off the backlight by pressing
indicator turns off.During Sleep Mode,the backlight will turn off to help
conserve battery power, but will turn on again automatically upon resumption of normal operation if it
nternal speaker that will emit a beepfor each valid key press, and also functions
as an alarm in the Calibration mode (see the Calibration section below). It will also beep every 5
ressing and holding the
indicator on the LCD
f the gauge and will allow it to
swivel freely in any direction. The gauge may be operated with or without the hook attached. When
fastening the hookto the gauge, turn it finger tight only. Use of a tool totighten the hook may result in
should provide many years of service with no maintenance required. When not in use, the
dust cap should remain in place over the sensor port. Clean the plastic enclosure with a damp (not
ptable, but use no solvents. Take care not to expose the vacuum
sensor to oil. If the Oil Sensor (described above) indicates a contaminated sensor, follow the Sensor
aminated with oil (as indicated by the Oil Sensor), carefully follow
NOT INSERT ANY
OBJECT INTO THE PORT, AS THIS WILL PERMANENTLY DAMAGE THE SENSOR
).
ir dry over at least an hour, or pull a vacuum on the sensor to clean it more
Replace the battery andturn on the gauge. The Oil Indicator should be off. If it is still on, repeat
alibration cycle as detailed in the Calibration section below.
: It is important to remove all alcohol vapors from the sensor, eitherthrough air
-drying or via
CALIBRATION TEST
The EVac I
should rarely require recalibration,though it may be necessary to knowthat yourgauge is
calibrated properly for full accuracy. The Calibration Test mode assures you that the
calibrated to factory specifications. Test the calibration as follows:
1. Turn the EVac I power off.
2. Important: Expose the EVac I to atmospheric pressure.
3. Press and hold (do not release) the key for about 5 seconds.
4. The display will show
if the instrument is calibrated properly.
5. The display will show
if the instrument requires calibration. Please see the
Calibration section below.
CALIBRATION
If the Calibration Test indicates recalibration is required, the gauge may be recalibrated. Unlike any
other vacuum gauge, the EVac I can be easily recalibrat
ed tofactory specifications without any
special equipment, with the following procedure:
1.
For best results, cleanthe sensor with alcohol prior to calibration. Ensure the sensor is
completely dry before proceeding.
2. Turn the EVac I power off. If necessar
y, install a fully charged battery into the gauge.
3. Place the dust cap over the vacuum fitting.
4. Hold while pressing . As soon as the power turns on, release
press quickly at least three times. The
indicator should illuminate, an
should show on the Main Numeric Display. If not, turn the power off again and repeat.
5. Place the EVac I
in a clear Ziploc (resealable zipper storage) bag, press outany extra air, and
seal.
6. Place the bagged EVac I into a freezer with a temperature of less than –5
°
7. Allow the EVac I to cool to below -2°C (28.4°
F). At this point, the alarm will sound andthe
display will changeto .
8. Remove from freezer and press any key to silence the alarm.
9. Place the EVac I undisturbed in an area with a room te
mperature of at least 23
no greater than 30°C (86°F).
10. Allow the EVac I to warm to 20°C (68°
F). At this point, the alarm will sound, and
show on the display.
11. Press any key to silence the alarm. The EVac I
is now calibrated to factory
Note: For accurate calibration, it is necessary to allow the EVac I
to warm slowly. Attempting to
accelerate the warming by using a heat source will not provide satisfactory results. During the
cooling/warming process, the temperature w
ill be indicated on the Alternate Numeric Display in
degrees Celsius. The calibration process may be canceled at any time by turning off the
previous calibration will be unchanged.
should rarely require recalibration,though it may be necessary to knowthat your gauge is
calibrated properly for full accuracy. The Calibration Test mode assures you that the
EVac I is
if the instrument is calibrated properly.
if the instrument requires calibration. Please see the
If the Calibration Test indicates recalibration is required, the gauge may be recalibrated. Unlike any
ed tofactory specifications without any
For best results, cleanthe sensor with alcohol prior to calibration. Ensure the sensor is
y, install a fully charged battery into the gauge.
and and then
indicator should illuminate, an
d
should showon the Main Numeric Display. If not, turn the power off again and repeat.
in a clear Ziploc (resealable zipper storage)bag, press out any extra air, and
°
C (23°F).
F). At this point, the alarm will sound andthe
mperature of at least 23
°C (73.4°F) but
F). At this point, the alarm will sound, and
will
is now calibrated to factory
specifications.
to warm slowly. Attempting to
accelerate the warming by using aheat source will not provide satisfactory results. During the
ill be indicated on the Alternate Numeric Display in
degrees Celsius. The calibration process may be canceled at any time by turning off the
EVac I. The
RESTORING FACTORY CALIBRATION
The original factory
calibration can be restored at anytime by the following procedure:
1. Turn the EVac I power off.
2. Hold while pressing . As soon as the power turns on, release
press quickly at least three times. The
indicator should illuminate, a
should show on the Main Numeric Display. If not, turn the power off again and repeat.
3. Press five times followed by .
4. The gauge will beep 5 times and return to normal operation. The EVac I
is now reset tothe
originalfactory calibration.
TROUBLESHOOTING
Under certain conditions, the display may read or
. Please use the table
below to determine and fix the problem:
Display Mode Possible Problem
Solution
Normal
Operation
Sensor Contaminated
Clean the Vacuum Sensor
Ambient Temperature too
Low
Turn the e
Vac
vacuum port with yourhand,
and turn the
Calibration Sensor Contaminated
Clean the Vacuum Sensor
and Restart Calibration
Calibration
Gauged Warmed too
Quickly
Restart Calibration. Allow the
Gauge to
Gauge Disturbed During
Calibration
Restart Calibration.Leave
the Gauge Undisturbed
During Warming Phase.
LOW TEMPERATURE OPERATION
The EVac I can operate accurately at temperatures as low as 10°F (-12°
C). While operating below
freezing (32°F/0°
C),the display update rate will slow from 3.5 readings every second toone reading
every two seconds.
A standard alkaline battey may not provide acceptable battery life at temperatures below 0
For low temperature operation, a 9V Lithium battery is recommended.
calibration can be restored at anytime by the following procedure:
and and then
indicator should illuminate, a
nd
should showon the Main Numeric Display. If not, turn the power off again and repeat.
is now reset tothe
. Please use the table
Solution
Clean the Vacuum Sensor
Vac
I off, warm the
vacuum port with your hand,
and turn the
eVac I back on.
Clean the Vacuum Sensor
and Restart Calibration
Restart Calibration. Allow the
Gauge to
Warm Slowly
Restart Calibration.Leave
the Gauge Undisturbed
During Warming Phase.
C). While operating below
C),the display update rate will slow from 3.5 readings every second to one reading
A standard alkaline battey may not provide acceptable battery life at temperatures below 0
°C (32°F).
NOTES
4
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
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