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Ordering information
Fluke-PV350 Pressure
Vacuum Module
Pressure
HVAC Pressure Module
Fluke PV350 Pressure
Vacuum Module
Key features:
•
Compatible with all Fluke and most
popular DMMs
•
Digital pressure and vacuum measurements
in a single module
•
Transducer sealed in 316 stainless steel
compatible with a variety of liquids and
gases
•
Measures vacuum to 76 cm Hg
•
Displays results in English (psig or Hg) or
metric (kPa or cm Hg) units
•
Measures pressure to 3447 kPa (500 psig)
Refrigeration cycle
Quick Tips
Measuring superheat
and subcooling
To measure superheat:
1) Measure suction pressure
with a pressure module
and your digital multimeter
(DMM). Convert pressure
to temperature using your
PT chart.
2) Measure the pipe temperature
at the outlet of the evaporator
with a pipe clamp and your
temperature meter.
3) Subtract the difference
in temperatures to obtain
superheat.
To measure subcooling:
1) Measure liquid line pressure
(or discharge pressure if there
is no liquid line access valve)
with a pressure module and
your DMM. Convert the pres-
sure to temperature using your
PT chart.
2) Measure the pipe temperature
at the outlet of the condenser
with a pipe clamp and your
temperature meter.
3) Subtract the difference
in temperatures to obtain
subcooling.
Bubble Point -
Used to determine
subcooling
Constant
temperature lines
BTU’s/Lb-Enthalpy
Evaporator
Compressor
Condenser
Metering
Device
Pressure-Enthalpy (PH) diagram for refrigerant blends
Dew Point - Used to
determine superheat
Psia
Condenser
Compressor
Evaporator
Liquid psig
refrigerant bubble point
Metering
device
Liquid receiver
Vapor psig
refrigerant dew point
19
Superheat temperature measurement points.
For use with:
Fluke 116