yellow jacket EVac I Operation And Maintenance Manual

EVac I

™

Digital Vacuum Gauge

99 Washington Street
Melrose, MA 02176

Phone [phone]
Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

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

• Buil

• Rugged, Compact Design – About the Size of a Manifold Gauge

• Long Battery Life

• Calibration Self Test -- Can be field calibrated with no special equipment

• Ideal for HVAC/R Service and Industrial Use

t-in memory retains all previous settings

SPECIFICATIONS

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Vacuum Accuracy: 5% of Reading +/- 5 Microns

Vacuum Resolution: 1 Micron

Warm-up

Response Time: Instant

Battery Life: Up to 300 Hours

Operating Temperature: 10°F – 122°F (-12°C – 50°C)

Dimensions: 3.5” x 3” x 1.25” (9cm x 7.5cm x 3cm)

War
Vacuum Gauge, never exceed 500 PSI.

Time: Instant

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PARTS DIAGRAM

LCD DISPLAY

Indicates that Temperature is Displayed on the Alternate Numeric Display (during

Indicates degrees Celsius on the Alternate Numeric Display (during calibration)

Item Function

A Main Numeric Display

B Alternate Numeric Display

C “Analog” Vacuum Level Bar Graph

Backlight Indicator. Flashing: Temporary, Solid: Always On

Sound Indicator

Battery Level Indicator

Oil Sensor Indicator

Calibration Mode Indicator

calibration)

Pascal Units Indicator

Millibar Units Indicator

Millitorr Units Indicator

Millimeters of Mercury Units Indicator

Micron Units Indicator

KEYPAD

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 clip to new battery and insert into battery compartment. Replace battery cover by

IMPORTANT: TO PREVENT DAMAGE FROM LEAKING BATTERIES, DO NOT LEAVE A DEAD

IS NOT TO BE USED FOR AN

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

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
greater than 25,000 Microns.

3. Select the desired units by repeatedly pressing .

4. Attach the EVac I to the sy
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
battery cover.

2. If necessary, remove and detach old battery from battery clip.

3.
by aligning tab and snapping back into place.

BATTERY INSIDE THE EVac I. REMOVE BATTERY IF THE EVac I
AN EXTENDED PERIOD OF TIME.

BATTERY LEVEL INDICATOR

The battery level indicator shows the relative

point, it is necessary to replace the batteries (refer to the Battery Installation section above)

If the battery power drops to 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

If the sensed vacuum pressure exceeds 25,000 Microns (3333.1 Pa, 33.331 mBar, 25,000 mTorr, or

helps to conserve battery life through advanced

will enter “Sleep Mode” in

in which the sensor and backlight are turned off, thus reducing the load on the battery and extending the

will automatically turn itself off to further conserve battery

It is necessary to prevent oil from being drawn into the Vacuum Sensor. For HVAC/R service, always

-

on the vacuum pump prior to turning the vacuum pump off. Over time, oil vapor and other

has a built in Oil Sensor that will detect this condition. If the

key on the keypad. The appropriate units indicator

replaced, and the EVac I is turned back on, the EVac I will resume operation with all previous
settings intact.

HI-PRESSURE INDICATION

mTorr, or25.000 mmHg), the display will show .

SLEEP MODE

Unlike other Digital Vacuum Gauges, the EVac I

power management. After 5 minutes of displaying , the EVac I

extending the battery life up to 300 hours or more. While in this mode, the display will show

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).

. Approximately every 35 seconds, the gauge will automatically check the pressure

AUTO POWER-OFF

After 1 hour in “Sleep Mode” the EVac I
battery power.

OIL SENSOR

always recover refrigerant prior to attaching gauge. If possible, always close the blank

materials may contaminate the sensor. The EVac I
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

described in the “Cleaning the Vacuum Sensor” section.

will show on the display. Prior to further use of the

EVac I, clean the sensor as

off valve

UNITS

Change the displayed units by pressing the
indicator on the LCD display will show Pa, mBar, mTorr, mmHg, or Microns depending on
the units set.

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176

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RANGE AND RESOLUTION

Vacuum

Units

Bar

The EVac I has a broad vacuum pressure measurement range and very high resolution
according to the table below:

Range Resolution

Pascals (Pa)

—

3,333.1 0.1 Pa

0

Millibar (mBar)

Millitorr (mTorr)

mmHg (mmHg)

Microns (Microns)

—

33.331 0.001 mBar

0

—

25,000 1 mTorr

0

—

25.000 0.001 mmHg

0

—

25,000 1 Micron

0

“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 corresponds to a vacuum pressure range depending
on units according to the following table:

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

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 beep for 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 hook to the gauge, turn it finger tight only. Use of a tool to tighten 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

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 and turn 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, either through air

To activate the Backlight temporarily, press once. The indica

press again. The

repeatedly until the

was previously set in the permanent-on mode.

SOUND

The EVac I has an i

minutes in Sleep Mode. For silent operation, the sound can be muted by p
key. The Calibration mode alarm is not affected by the mute status. The
display indicates that the sound is on (not muted).

SWIVEL HOOK

The EVac I’s removable stainless steel swivel hook enables hanging o

damage to the EVac I case.

MAINTENANCE

The EVac I

wet) rag. Mild detergent is acce

Cleaning Procedure below.

CLEANING THE VACUUM SENSOR

If the vacuum sensor becomes cont
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

4. Place your finger 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
quickly.

8.
the cleaning procedure.

9. If full accuracy is desired, perform a c

Note

vacuum. Any remaining vapors will cause an incorrect vacuum reading.

NOT INSERT ANY

-drying or via

).

CALIBRATION TEST

should rarely require recalibration, though it may be necessary to know that your gauge is

calibrated properly for full accuracy. The Calibration Test mode assures you that the

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 to factory specifications without any

For best results, clean the sensor with alcohol prior to calibration. Ensure the sensor is

y, install a fully charged battery into the gauge.

indicator should illuminate, an

should show on 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

°

F). At this point, the alarm will sound and the

mperature of at least 23

F). At this point, the alarm will sound, and

is now calibrated to factory

to warm slowly. Attempting to

accelerate the warming by using a heat 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

°

The EVac I

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

5. The display will show
Calibration section below.

CALIBRATION

other vacuum gauge, the EVac I can be easily recalibrat
special equipment, with the following procedure:

1.
completely dry before proceeding.

2. Turn the EVac I power off. If necessar

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 

5. Place the EVac I
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°

display will change to .

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
no greater than 30°C (86° F).

10. Allow the EVac I to warm to 20° C (68°
show on the display.

11. Press any key to silence the alarm. The EVac I

EVac I is

and and then

d

C (23°F).

°C (73.4° F) but

will

specifications.

Note: For accurate calibration, it is necessary to allow the EVac I

cooling/warming process, the temperature w

previous calibration will be unchanged.

EVac I. The

RESTORING FACTORY CALIBRATION

calibration can be restored at any time by the following procedure:

indicator should illuminate, a

should show on the Main Numeric Display. If not, turn the power off again and repeat.

is now reset to the

. Please use the table

Solution

Clean the Vacuum Sensor

Vac

vacuum port with your hand,

and turn the

Clean the Vacuum Sensor

and Restart Calibration

Restart Calibration. Allow the

Gauge to

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

The original factory

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 

3. Press five times followed by .

4. The gauge will beep 5 times and return to normal operation. The EVac I
original factory calibration.

TROUBLESHOOTING

Under certain conditions, the display may read or
below to determine and fix the problem:

Display Mode Possible Problem

Normal

Operation

Calibration Sensor Contaminated

Calibration

Sensor Contaminated

Ambient Temperature too

Low

Gauged Warmed too

Quickly

Gauge Disturbed During

Calibration

Turn the e

and and then

nd

I off, warm the

eVac I back on.

Warm Slowly

LOW TEMPERATURE OPERATION

The EVac I can operate accurately at temperatures as low as 10°F (-12°
freezing (32°F/0°
every two seconds.

For low temperature operation, a 9V Lithium battery is recommended.

°C (32° F).

NOTES

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176

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