Fieldpiece SVG3 User Manual

Fieldpiece

MIN

MIN

MIN

MICRONS OF MERCURY

VACUUM

GAUGE

MIN

ALARM

MIN

MICRONS OF MERCURY

SVG3

VACUUM

GAUGE

MIN

ALARM

ENTER

GAUGE

MIN

Easy View
Vacuum Gauge

OPERATOR'S MANUAL

Model SVG3

Quick Start

1. Power on your SVG3 by holding the
button for 1 second.

2. Connect to system directly to an

unused service port, a Schrader core
removal tool (SCRT), or via hoses.

3. View vacuum in microns of mercury

on the top line and rate of change
(±microns per minute) on the bot­tom line.

Description

Proper evacuation of any system
exposed to atmosphere is critical to
ensure efficient operation and the
SVG3 is the right tool to help HVACR
professionals verify they reach proper
vacuum levels. See your vacuum
measurement clearly and easily with
the newly designed easy-view hook
and backlight. SVG3 is built for eld
use with its ruggedized rubber case.

Reducing connections mini­mizes leaks, so the SVG3 has
a female 1/4" flare fitting with

MIN

MICRONS OF MERCURY

VACUUM

ALARM

GAUGE

Certifications

C-Tick (N22675)

schrader depressor so you can
connect it directly to a service port or
your valve core removal tool.

Be alerted when you've reached
your desired vacuum levels with built

ENTER

CE

SVG3

WEEE

in Hi and Lo Alarm functions. Check for
leaks with rate indication in microns
per minute. The HVACR professional
can do more with condence that he

RoHS Compliant

01 03 0602 0504

is doing the job right the rst time.

Display

MIN

Top Line: Live Vacuum Measurement

in Microns of Mercury (Hg)

Bottom Line: Rate of Micron Change

or Alarm Stopwatch

Auto Power O Enabled
Battery Life
Alarm Set Mode
Low Alarm Mode
High Alarm Mode
Rate of Micron Change
(±Microns Per Minute)

Controls

Hold 1 second to power SVG3 on/ o. Press

<1 second to toggle backlight.

Press to activate Alarm Lo, Alarm Hi, and

return to real time mode. Hold 1 second to
enter or exit Alarm Set mode.

Lock in selected digit and move to next in

Alarm Set Mode.

Increase or decrease blinking digit in

Alarm Set Mode. Toggle to display
stopwatch or rate of change when an
alarm is activated in real time mode.

BACKLIGHT NOTE: The backlight timer is automatically
extended for 1 min when any button is pressed. A short
press of

toggles backlight on and o.

Specifications

General

Operating temperature: 32°F (0°C) to 122°F (50°C) at

<75%RH

Storage temperature: -4°F to 140°F (-20°C to 60°C), 0

to 80% RH (with battery removed)

Temperature coecient: 0.1 x (specied accuracy)/°C

(<18°C or >28°C)
Over range: "OL" is displayed
Power: 4 x AAA batteries, NEDA 24A, JIS UM4, IEC R03
Auto power o: after 15 minutes of readings more

than 10,000 microns if APO is active.
Battery life: 40 hours standard use (alkaline) without

backlight use.
Low battery indication: is displayed when the

battery voltage drops below the operating level.

Vacuum Pressure

Units of measure: microns (µm) of mercury
Connector type: Standard 1/4" female are tting. "T"

tting included ( 3 male are ports)
Range: 0 to 9999 microns of mercury
Accuracy: ±(5% of reading + 5 microns), 50 to 1000

microns
Resolution: 1 micron (50 to 2000 microns), 250

microns (2001 to 5000 microns), 500 microns (5001

to 8000 microns), 1000 microns (8001 to 9999

microns)
Rate: Microns per minute
Refresh rate: 0.5 seconds
Atmospheric pressure: "OL" will be displayed
Maximum overload pressure: 500 psig

How to Use

Normal Mode

Measure deep vacuums to
monitor your system evacua­tions. Deep vacuums help remove
non-condensable gases that can
cause problems in a system.

There are many ways to connect to
the system, Fieldpiece recommends
using a SCRT and the shortest vacuum
rated hoses possible. Fewer connec­tions reduce the potential for leaks.

1. Connect to system. Techs typically prefer connect-

ing to the Schrader Core Removal Tool (SCRT) or an

unused service port.

2. Hold for 1 second to power ON the SVG3.

3. The top display shows the vacuum in microns of

mercury.

4. The bottom display shows how fast the measure-

ment is increasing or decreasing (± microns of

mercury per minute).

07 09 1208 1110

Hose

To

Pump

Recommended

Setup

MIN

MICRONS OF MERCURY

VACUUM

GAUGE

ALARM

ENTER

SVG3

Schrader Core

Removal Tool

(tool not included)

To

Pump

Directly to

Service Port

MICRONS OF MERCURY

VACUUM

GAUGE

ALARM

ENTER

MIN

SVG3

Other Common

Setups

To

Service

Port

MICRONS OF MERCURY

VACUUM

GAUGE

ALARM

ENTER

SVG3

Hose to

Removal

Tool

MIN

Low and High Alarms

Be alerted when you've reached your
desired vacuum levels. Work on other
tasks at the jobsite and let SVG3 alert
you when the system is ready.

Activate the low alarm (default 500
microns) to alert when the vacuum has
dropped to your desired micron level.

Activate the high alarm (default 1000
microns) to see how long it takes the
system to stabilize after the vacuum
pump has been isolated. If the system
does not stabilize over time, you may
have a leak in the system or your con­nections.

The stopwatch will start when an
alarm is activated. It will restart when
the low alarm has been reached to show
how long you've pulled a vacuum after
reaching your desired micron level. The
stopwatch will stop when the high alarm
has been reached to show how long it
took to rise to your high alarm value.

When an alarm is activated the UP or
DOWN ARROW toggles the stopwatch
and rate of change (± microns per min­ute) display.

How to Activate the Alarms

1. Press ALARM to activate low alarm.

2. Press ALARM again to deactivate low alarm and
activate high alarm.

3. Press ALARM again to deactivate high alarm and
return to real time mode.

How to Set the Alarms

The default low (500 microns) and

high (1000 microns) alarm values can
easily be set to whatever you want.

1. Hold ALARM for 1 second to enter Alarm Set Mode.
The rst digit of LO alarm will blink.

2. Use ARROWS to change the blinking number. Press
ENTER to lock in a digit and move to the next digit.
Repeat for all LO alarm digits.

3. When LO alarm is complete, the rst digit of HI alarm
will blink. Use ARROWS to change the blinking
number. Press ENTER to lock in a digit and move to
the next digit. Repeat for all HI alarm digits.

4. When all digits of HI alarm are locked in you will
automatically exit Alarm Set Mode and your
customized alarm values will be saved.

Note: Anytime while in Alarm Set Mode, you can press

ALARM to toggle between alarm HI set and alarm
LO set. Hold ALARM to exit Alarm Set Mode and
save at any time.

Note: "Err" will show if you try to set the HI alarm

lower than the LO alarm, or the LO alarm higher
than the HI alarm.

Vacuum Tips

Follow all manufacturer's evacu­ation procedures over those in this
manual in regards to specications on
how to evacuate systems. To achieve
a deep vacuum eciently Fieldpiece
recommends the following practices.

1. Remove Schrader cores and core depressors from

the service ports using a valve core removal tool

(purchased separately).

2. Use the shortest vacuum rated hoses with the

largest diameter available.

3. Inspect rubber seals at both ends of your hoses for

damage that may result in leakage.

4. Avoid using hoses with low loss ttings when

evacuating a system.

5. Avoid over-tightening the female are tting of

the SVG3. Over-tightening may cause the rubber

gasket to wear more quickly and create leaks. It is

not necessary to over tighten SVG3 to the extreme

to create a good seal.

Maintenance

Battery Cover Screw

PRESS FOR 1 SECOND

AUTO-OFF

SRS2

Wireless
Refrigerant

Scale

ZERO

SYNC

UNITS

ON/OFF

PRESS FOR

1 SECOND

SC57

AUTO OFFTRUE RMS

CAT III

600V

TEMP

K-TYPE

30V

MAX

SC57

O
F

F

WIRELESS ENABLED

SEL

HOLD

HOLD
MAX

MIN

SYNC

SYNC

MAX
MIN

SENSITIVITY

H

M

L

AUTO-ZERO

LOW-BATT

SRL8

ON/OFFMUTE

ZEROL/M/H

Heated Diode
Refrigerant
Leak Detector

PRESS FOR
1 SECOND

BATTERY
CHECK

80

80

Clean the exterior with a dry cloth.

Do not use liquid.

Battery Replacement

Power off SVG3. Unscrew battery

cover, and replace the 4 AAA batteries.

!

Cleaning the Sensor

1. Turn o your SVG3.

2. Remove the core valve depressor and rubber gasket.
A small pair of needle nose plyers can easily pull
out the depressor and the gasket at the same time.
Be careful to not puncture or tear the gasket.

3. Fill the cavity halfway with isopropyl (rubbing)
alcohol.

4. Use your index nger to cover female are tting
and gently swirl and shake the alcohol within the
cavity for about 15 to 30 seconds.

5. Pour out the alcohol and let the vacuum sensor dry
with the are tting facing down.

6. Re-insert core depressor and rubber gasket. Screw in
T-tting (included) to lock in the rubber gasket.

Note: Do not use an object such as a cotton swab to

clean the sensor. This may damage the sensor.

Replacement Parts

Rubber gasket and Schrader de­pressor are user-replaceable. Worn
out gaskets and depressors can lead
to a bad seal. Over-tightening of the
SVG3 female are tting may cause
the rubber gasket to wear more
quickly. Replace if the rubber gasket
becomes worn or the Shrader depres­sor is not in the center. Both these
parts can easily be found at your local
HVACR distributor.

1. Remove both the Schrader depressor and rubber

gasket from the are tting. Dispose of worn

rubber gasket. A small pair of needle nose plyers

can easily pull out the depressor and the gasket at

the same time. Be careful not damage the Schrader

depressor.

2. Re-insert and center the Schraeder depressor into

the are tting. If the depressor does not stay

centered, replace with a new one.

3. Drop in and position of the new rubber gasket

(standard 1/4" rubber gasket replacement part)

around the Schraeder depressor. Push in with your

nger.

4. Lock O-ring into place by screwing in the included

brass T-tting. Do not over-tighten.

A/C Basics

The Evaporator, Condenser, Restric­tor (Throttling valve) and Compressor
are the four basic components of an
air conditioner. Following one pound
of refrigerant through the system
shows the function of each compo­nent.

Subcooled liquid refrigerant at high
pressure enters the restrictor and is
throttled to saturated refrigerant at a
lower pressure. The restrictor can be
either a xed or TXV/EXV type. The
xed type must be charged to a target
superheat that varies with indoor and
outdoor conditions. TXV/EXV systems
must be charged to subcooling.

The evaporator capacity varies
with the indoor heat load on a xed
restrictor. The TXV/EXV regulates the
size of the restriction to maintain a
constant superheat. This essentially
adjusts the capacity of the evaporator
responding to the indoor heat load.

After the restrictor, refrigerant
enters the evaporator at a low tem­perature and pressure, and boils

13 15 1814 1716

(evaporates) into a gas by absorbing
heat from the indoor air. The refriger­ant stays at the same temperature
and pressure until all the refrigerant
evaporates into a gas. After the refrig­erant becomes a gas, it will continue to
absorb heat and become superheated
at which point its temperature will
change. The Superheat measurement
is the best indication of refrigerant
charge level in a xed restrictor sys­tem. A TXV/EXV system will keep the
superheat constant. There must be
superheat present to ensure liquid
does not ood the compressor.

Superheat measurements are
taken on the suction line between
the evaporator and compressor.

The compressor takes this low
temperature, low pressure, slightly su­perheated refrigerant and compresses
it to a much higher temperature and
pressure.

The highly superheated gas enters
the condenser and rejects heat into
the outside air. The refrigerant con­denses back into a liquid. Once all of

the gas is condensed into a liquid,
additional removal of heat causes
a temperature drop that is known
as subcooling. TXV/EXV systems are
charged to subcooling since super­heat is controlled by the throttle
valve. Subcooling measurements are
taken on the liquid line between the
condenser and TXV/EXV. Finally, the
subcooled liquid enters the restrictor
and the cycle starts again.

EVAPORATOR

RETURN AIR SUPPLY AIR

w

o

L

P

r

e

s

s

u

r

e

REFRIGERANT

FLOW

s

u

r

e

e

d

i

S

CONDENSER

S

i

d

e

COMPRESSOR

THROTTLE

VALVE

H

i

g

h

P

r

e

s

OUTDOOR AIR HOT AIR

Limited Warranty

This meter is warranted against
defects in material or workmanship
for one year from date of purchase.
Fieldpiece will replace or repair the
defective unit, at its option, subject
to verication of the defect.

This warranty does not apply to
defects resulting from abuse, ne­glect, accident, unauthorized repair,
alteration, or unreasonable use of the
instrument.

Any implied warranties arising
from the sale of a Fieldpiece product,
including but not limited to implied
warranties of merchantability and
fitness for a particular purpose, are
limited to the above. Fieldpiece shall
not be liable for loss of use of the
instrument or other incidental or
consequential damages, expenses, or
economic loss, or for any claim of such
damage, expenses, or economic loss.

State laws vary. The above limita­tions or exclusions may not apply to
you.

For Service

More Great Tools

In the USA, call Fieldpiece Instru-

ments for one-price-x-all out of war-

from Fieldpiece

ranty service pricing. Send check or
money order for the amount quoted.
Send the meter freight prepaid to
Fieldpiece Instruments. Send proof
of date and location of purchase for
in-warranty service. The meter will be
repaired or replaced, at the option of
Fieldpiece, and returned via least cost
transportation.

For international customers, war­ranty for products purchased outside
of the U.S. should be handled through
local distributors.

19 21 2420 2322

www.fieldpiece.com

© Fieldpiece Instruments, Inc 2013; v22

Wireless Refrigerant Scale

Model SRS2C

Wireless 4-Port Manifold

Model SMAN4

Heated Diode Refrigerant Leak Dectector

Model SRL8

Dual In-Duct Psychrometer

Model SDP2

Wireless Clamp Meter

Model SC57