SMAN360 - Fieldpiece Instruments

Quick Start
1 Install six AA batteries into rear battery compartment. Batteries included in packaging.
2 Press the center blue button for 1 second to
turn on your new manifold.
3 Connect hoses and pipe clamps to the manifold and the system.
4 See real-time pressure and temperature measurements all at once!
Digital Manifold &
Micron Gauge
Model SMAN360
Your SMAN360 is the top of the line twovalve Digital Manifold and Micron Gauge for
HVACR professionals. See all your pressures
and temperatures at the same time on the
redesigned large display with bright blue
SMAN360 combines high precision, absolute
pressure sensors, a superheat/subcooling
calculator, true micron gauge for vacuum,
and dual temperature measurements. Your
SMAN360 calculates and displays target
superheat and actual superheat to verify proper
SMAN360 is designed to meet the demands
of HVACR field service with a rugged rubber
boot for durability, a strong metal hanger for
easy storage and a form fitting, water resistant,
padded nylon pouch. SMAN360 has a very
intuitive user interface and long battery life.
Your SMAN comes pre-programmed with
accurate P-T charts for 45 of the most common
refrigerants in the field so you are always
prepared for any job.
C-Tick (N22675)
RoHS Compliant
Insert Type K thermocouple plugs here.
Temperature calibration pots.
Press to zero atmospheric pressure.
Press to calibrate to refrigerant tank.
(See Advanced Pressure Calibration section.)
5 Press to confirm selection.
6 Press/hold to cycle through refrigerants.
7 Press to turn on/off the Hi/Lo vacuum
alarms and hold to change alarm settings.
8 Press to scroll up to adjust values.
9 Press to change units.
10Press to scroll down to adjust values.
11Hold 1 second to power on or off. Press to toggle backlight.
12Press to enter Target Superheat set up mode.
13Turn clockwise to close High side port.
14Turn clockwise to close Low side port.
Outdoor Dry Bulb
Indoor Wet Bulb
Static Target Superheat Calculation
Hours:Minutes or Minutes:Seconds
Battery Life
Auto Power Off Enabled
Selected Refrigerant of System
Vacuum (Microns of Mercury)
Rate of change (Microns per Minute)
Set Mode
High Alarm
Low Alarm
Activate Vacuum Alarms
1 Press ALARM to activate low alarm. Default is 500 microns.
Stopwatch will start. When low alarm target value is reached,
SMAN360 will beep and the stopwatch will restart from zero. You
can monitor how long the vacuum has been under your target.
2 Press ALARM again to deactivate low alarm and activate high
alarm. Default is 1000 microns. When high alarm value is
reached, SMAN360 will beep and the stopwatch will pause. You
can see how long it took to reach your target value.
3 Press ALARM again to deactivate high alarm.
Additional Evacuation Tips to Reach a Deeper Vacuum:
1 Use shortest vacuum rated hoses with largest diameter available.
2 Remove schrader cores and core depressors. Core removal tools
like the "MegaFlow Valve Core Removal Tool" can be purchased
from Appion, Inc. to help with this process.
3 Inspect the rubber seals at both ends of your hoses for damage
that may result in leakage.
4 Do not use hoses with low loss fittings when evacuating or
pulling a vacuum on a system.
5 When the vacuum pump is isolated from the system, a slow rise
in micron levels may signify moisture is still present in the system
but should eventually stablize. A continuous rise in microns levels
to atmosphere may indicate a leak in the hoses, the vacuum
pump connections or the system.
Follow all manufacturers’ evacuation procedures over those in this
1 Connect your SMAN360 to your vacuum pump and the system,
then power on your SMAN360.
2 Set up vacuum alarms. These will notify you when you've reached
your desired vacuum and stabilization levels. See Set Vacuum
Alarm instructions below.
3 Pull a vacuum on the system. SMAN360 will automatically sense
the negative pressure and begin to display in inHgV. Once the
vacuum levels are low enough, the display will automatically
change to show vacuum in microns. Once in micron mode the
inHgV readings will no longer display.
4 The rate at which the vacuum levels are changing will be
displayed in microns per minute. The smaller the rate of change,
the closer you are to stabilization.
Changing Units
Your SMAN can display pressure and temperature measurements in
English, Metric or combination of both units.
1 Press UNITS to enter unit selection screen.
2 Use ARROW to select your desired pressure units. Press ENTER.
3 Use ARROW to select your desired temperature units. Press ENTER
to return to pressure units.
4 Press UNITS to return to normal SMAN display.
Pulling a Vacuum
Manually Input Temperatures
1 Press Target SH button to enter Target SH mode. IDWB will begin
blinking indicating it is ready for an input.
2 Press UP or DOWN ARROW to toggle between IDWB or ODDB
input. Hold ENTER to select which temperature you want to input,
either IDWB or ODDB. The far left digit of IDWB or ODDB will begin
blinking indicating manual input mode is ready.
3 Press the UP or DOWN ARROW to change values and press ENTER
to lock in each digit.
4 Repeat steps 2 and 3 for the other temperature. The calculated
target superheat will show in the center column of the display. A
solid HOLD will display to the left of the TSH calculation indicating
a static target superheat calculation.
Note: If the inputted temperature is out of the calculable range for
IDWB or ODDB an "Err" will flash once and a double beep will
sound. IDWB range (40°F to 125°F, 4.4°C to 51.7°C) and ODDB
range (50°F to 140°F, 10°C to 60°C). Re-input a temperature
within these ranges to calculate target superheat.
Pressure (bar)
Pressure (pounds/in2)
Pressure (kilopascals or Megapascals)
Negative Pressure (inches of mercury)
Negative Pressure (cm of mercury)
Target Superheat
Suction Line Temperature
Liquid Line Temperature
Vapor Saturation Temperature
Liquid Saturation Temperature
Target Superheat is useful for charging fixed orifice air conditioning
systems. Your SMAN will calculate the target superheat for you. Just
manually input the IDWB (indoor wet bulb) and ODDB (outdoor dry
bulb) temperatures into the SMAN.
Your SMAN360 can calculate and display both superheat and
subcooling simultaneously.
1 Select the appropriate refrigerant using the REFRIGERANT button.
2 Connect EPA approved refrigerant hoses to low and high side on
SMAN360. Plug Type K thermocouple pipe clamps to SLT and LLT.
3 Connect your SMAN360 to the system:
Superheat: Hand tighten low side hose to suction line service
port. Place the SLT pipe clamp thermocouple on the suction line
between the evaporator and compressor, no closer than 6 inches
to compressor.
Subcooling: Hand tighten high side hose to liquid line service
port. Attach the LLT pipe clamp thermocouple on the liquid line
between the condenser and expansion valve (TXV), as close to the
service port as possible.
4 After turning the system on or making any adjustments to
the system wait 15 minutes before charging by superheat or
subcooling to ensure the system is stabilized.
5 To add or remove refrigerant connect a refrigerant or recovery
tank to the center port on SMAN360. Follow recommened
charging or recovery practices from equipment manufacturer.
Use the low side and high side valves on SMAN360 to charge or
recover refrigerant as needed. Let system stabilize for 15 minutes.
Note: When superheat and/or subcooling cannot be calculated an
"OL" or "-OL" will be displayed. Please check the following:
1 The correct refrigerant is selected on the SMAN.
2 The pipe thermocouples are plugged into SLT/LLT ports and are in
good working condition.
3 The pipe thermocouples are attached in the appropriate location on
the system. See step 3 above for details.
Target Superheat
Superheat and Subcooling
Set Vacuum Alarms
1 Hold ALARM for 1 second to enter Alarm Set Mode. The first 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
3 When LO alarm is complete, the first 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 target 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.
Auto Power Off (APO)
To conserve battery life, your SMAN will power down after 30
minutes of inactivity. APO is activated by default and APO displays
above the battery icon. To deactivate, press and hold ENTER while
powering on the SMAN. When deactivated, APO will no longer show
above the battery icon.
What is Superheat and Subcooling?
Why Do I Need to Measure It?
Superheat is the difference between the
actual temperature of the refrigerant (gas) as
it leaves the evaporator and the boiling point
of the refrigerant. After boiling, the refrigerant
continues to heat up. The number of degrees it
“heats up” after boiling is called the superheat.
Under worst case conditions (low load for fixed
orifice systems), the refrigerant in the evaporator
boils off near the end of the evaporator coil. To
make sure liquid doesn’t enter the compressor
under the worst case condition (low load),
the refrigerator or A/C manufacturers publish
charts indicating what the superheat should be
at a given indoor wet bulb measurement and
outdoor air temperature.
Measuring superheat is your best indication
on a fixed orifice system of the proper
refrigerant charge and operating conditions.
If everything else is working properly and the
actual superheat is too high, add refrigerant. If
it’s too low, evacuate refrigerant.
Subcooling is the difference between the
boiling point of the refrigerant in the condenser
and the actual temperature of the refrigerant
Low Side
High Side
Location of Subcooling Test
Location of Superheat Test
Advanced Pressure Calibration
To calibrate your SMAN temperature
thermocouples, adjust the pot on the front
of the meter labeled SLT Cal or LLT Cal. The
best way to calibrate is to match to a known
temperature. Ice water is very close to 32°F and
is readily available. Accuracies of one degree or
better are easily obtained.
Calibration setup: For best results, first perform both the
Temperature and Pressure Zeroing procedures. See Calibration
section for details. This will ensure pressure readings are zeroed
and thermocouple is properly calibrated to the SLT port of the
SMAN. Calibration to LLT port is not necessary for this calibration.
The refrigerant cylinder should be stored in a stable ambient
environment for at least 24 hours before calibration.
1 Plug in a Type K thermocouple into SLT. (A bead type
thermocouple, like the ATB1, is recommended.)
2 Connect the SMAN360 to a refrigerant cylinder of a known,
single refrigerant using an EPA approved service hose. Be sure
to open both HIGH and LOW side valves on your manifold and
cap the unused ports. (If caps are not available you can connect
both ends of a refrigerant hose to the two unused caps. Note:
Some refrigerant will remain in the hoses which will need to be
3 Press the REFRIGERANT button to match the refrigerant of the
cylinder you are using.
4 Attach bead-type thermocouple to the side of the cylinder using
tape. It is recommended to attach in the middle of the cylinder.
Important: Let the temperature of the thermocouple stabilize to
the refrigerant temperature for 1 to 2 minutes or until stable.
5 Open the refrigerant cylinder. The pressure inside cylinder should
now be displayed on both HIGH and LOW side pressure sensors.
6 Press the CAL Test Pressure button. If successful, "Good" will
display for 3 seconds. If failed, "Err" will display for same time.
1 Stabilize a large cup of ice water by stirring. Pure, distilled water
will be the most accurate.
2 Immerse the temp probe in ice water from SLT and adjust the
SLT Cal pot with a flathead screwdriver and let it stabilize, keep
3 Repeat Step 3 for temp probe in LLT.
Pressure Zeroing
To calibrate your SMAN360 pressure sensors
to atmospheric pressure, ensure that your
SMAN360 is disconnected from any pressure
source and at equilibrium with the ambient
1 Press the CAL Atmospheric Pressure button and your SMAN360
will set the zero point of pressure to the ambient pressure.
Cleaning the Sensors
Over time, the vacuum sensor of the SMAN360
may become contaminated with dirt, oil, and
other contaminents introduced from pulling
The P-T charts of the following 45 refrigerants come preprogrammed into your SMAN. In your SMAN the refrigerants are listed
in order of most commonly used. Here, they are listed in numerical order.
R11, R113, R114, R12, R123, R1234YF, R124, R125, R13, R134A, R22,
R23, R32, R401A(MP39), R401B, R402A, R402B, R404A, R406A, R407A,
R407C, R407F, R408A, R409A, R410A, R414B (Hotshot), R416A, R417A,
R417C (HOT SHOT 2), R420A, R421A, R421B, R422A, R422B(NU22B),
R422C(Oneshot), R422D, R424A, R427A, R434A(RS-45), R438A(MO99),
R500, R502, R503, R507A, R508B (Suva95)
1 Never use an object such as a cotton swab to clean the sensor,
you may cause damage to the sensor.
2 Open all knobs/valves, and cap all the ports except for the center
3 Drop enough Isopropyl (rubbing) alcohol (>70%) into the
uncapped port using an eye dropper or funnel so that it can flush
out contaminents.
4 Cap central port and gently shake your SMAN upside down to
clean sensor.
5 Turn right side up. Open a port to pour out the rubbing alcohol
and open all ports to allow sensors to dry out; usually an hour or
Using Different Refrigerants
You can use your manifold with different refrigerants. Be sure to
purge your manifold and hoses before connecting to a system with a
different refrigerant.
Limited Warranty
Obtaining Service
This meter is warranted against defects
in material or workmanship for one year
from date of purchase from an authorized
Fieldpiece dealer. Fieldpiece will replace or
repair the defective unit, at its option, subject
to verification 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.
Firmware Updates
Your SMAN360 firmware can be updated in the field to ensure you
always have the most up-to-date features for your manifold. Just go
to to periodically check for the latest firmware
version. If a newer version is available, follow the download link and
installation instructions on the website. Connect your SMAN360 to the
PC via a mini-USB to USB cable (not included) to install the update on
your SMAN.
To check your current firmware version, power off your SMAN360.
Press and hold the blue power button for about 6 seconds. The SMAN360
firmware version will show in the top right corner of the display (X.XX).
The battery must be replaced when the
battery life indicator
is empty. SMAN will
display "lo batt" and power off. Remove rear
battery cover and replace with 6 AA batteries.
Your SMAN checks with its built-in P-T charts to compare the
temperature of the refrigerant in the tank to the vapor saturation
temperature based on the refrigerant you selected. If the measured
pressures on your SMAN are within ±3psi of the P-T chart pressure
corresponding to the vapor saturation temperature, the SMAN will
adjust the pressure sensor linearity to match the P-T chart.
Possible causes of failed "Err" pressure calibration:
1. Refrigerant tank was not stored in stable ambient conditions for at
least 24 hours.
2. Thermocouple attached to refrigerant tank was not properly
calibrated to SLT port of SMAN.
3. Thermocouple was plugged into wrong port LLT instead of SLT.
4. Incorrect refrigerant was selected on the SMAN.
Your SMAN360 has the ability to perform a
linear adjustment of the pressure sensors based
on refrigerant type, temperature, and pressure.
Battery Replacement
Sensor type: Type K thermocouple
Range: -95°F to 999.9°F (-70°C to 537.0°C)
Resolution: 0.1°F/°C
Accuracy: ±(1.0°F) -95°F to 199.9°F; ±(0.5°C) -70°C to 93°C
±(2.0°F) 200°F to 999.9°F; ±(1.0°C) 93°C to 537.0°C
Note: All accuracies are after a field calibration.
Connector Type: Standard 1/4" NPT male flare fitting
Range: 29” HgV to 580 Psig (English), 74 cmHgV to 0 to 4000KPa
Resolution: 0.1 psi/inHg; 1 kPa/cmHg
Accuracy: 29” HgV to 0” HgV: ±0.2” HgV
74 cmHgV to 0 cmHgV: ±1 cmHgV
0 to 200 Psig: ±1 Psi; 0 to 1378 KPa: ±7 KPa; 0 to 1.378MPa:
±0.007MPa; 0 to 13.78 bar ±0.07 bar
200 to 580 Psig: ±(0.3% of reading+1 Psig); 1378 to 4000KPa: ±(0.3% of
reading+7 Kpa); 1.378 to 4.000MPa: ±(0.3% of reading+0.007MPa);
13.78 to 40.00bar: ±(0.3% of reading +0.07bar)
Maximum overload pressure: 800 psig
Units: Psig, kPa, MPa, bar, inHg, and cmHg
Clean the exterior with a dry cloth. Do not
use liquid.
Direction of
Connector Type: Standard 1/4" NPT male flare fitting
Range: 0 to 9999 microns of mercury
Resolution: 1 micron (0 to 2000 microns), 250 microns (2001 to
5000 microns), 500 microns (5001 to 8000 microns), 1000 microns
(8001 to 9999 microns)
Accuracy: ±(5% of reading + 5 microns), 50 to 1000 microns
Maximum Overload pressure: 580 psig
Units: Microns of mercury
Backlight: Blue (On for 3 minute unless turned off manually)
Mini-USB Port: For updating to latest version of firmware.
Battery: 6 x AA (Battery life below based on alkaline type)
Battery life: 350 hours (without backlight and vacuum)
Low battery indication:
is displayed when the battery
voltage drops below the operating level
Auto Shut off: 30 minutes of inactivity when APO is activated
Operating environment: 32°F to 122°F (0°C to 50°C) at <75%
relative humidity
Storage temperature: -4°F to 140°F (-20°C to 60°C), 0 to 80% RH
(with battery removed)
Temperature coefficient: 0.1 x (specified accuracy) per °C (0°C to
18°C, 28°C to 50°C), per 0.6°F (32°F to 64°F, 82°F to 122°F)
Over range: "OL" or "-OL" is displayed
Weight: 3.04 lbs (1.38 kg)
Microns for Vacuum
Display size: 5 inches (diagonal)
as it leaves the condenser. The degrees that the
refrigerant “cools down” below the boiling point
is the subcooling. Under worst case scenario
(low load for TXV) the subcooling will continue
to rise. If the subcooling rises too high, liquid
may be backed into the compressor causing
damage and catastrophic failure. See www. for more technical articles.
Email Fieldpiece warranty department at for current fixed
price repair service. Send check or money
order made out to Fieldpiece Instruments for
the amount quoted. If your meter is under
warranty there will be no cost for the repair/
replacement. Send your 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
For international customers, warranty for
products purchased outside of the U.S. should
be handled through local distributors. Visit our
website to find your local distributor.
© Fieldpiece Instruments, Inc 2014; v05
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