Client Contact: Rey Harju
(714) 257-9060
fporders@fieldpiece.com
Press Contact: Beverly Steinberg
(714) 777-2760
GBL@speakeasy.net
Calculate Superheat and Subcooling
Automatically in One Accessory Head from Fieldpiece Instruments
ASX14 for A/C; ASX24
for Refrigeration
BREA,
Calif., June 12, 2006-- -- Fieldpiece Instruments announces the immediate
availability of the ASX14 and ASX24 Superheat and Subcooling Accessory Heads,
which enable DMMs to measure both refrigerant pressure and temperature simultaneously
to calculate both superheat and subcooling. The ASX14 works on A/C systems,
while the ASX24 works on refrigeration systems. Both accessory heads include
the Fieldpiece Instruments’ ATC1 Clamp Thermocouple that features a
spring-loaded clamp to firmly hold the thermocouple junction up against a
pipe, important when measuring line temperature. After measuring suction line
or liquid line temperature and pressure, the accessory heads calculate and
display the actual superheat or subcooling, saving the technician the hassle
of using charts to determine the numbers.
“When systems are undercharged or overcharged, the compressors are not
running efficiently and they have a greater chance of failing. So it’s
important to measure superheat and subcooling accurately,” said Rey
Harju of Fieldpiece Instruments. “The new accessory heads do the calculations
for the techs without the possibility of incorrectly reading the charts."
For charging A/C systems,
the ASX14 Accessory Head can measure R-22 or R-410A refrigerant. For refrigeration
systems, the ASX24 can measure R-134A or R404A refrigerant.
The included ATC1 thermocouple clamp can be used on pipe sizes up to 1 3/8”,
which covers most refrigerator pipes. A “Stable” LED indicator
is an important feature, especially when measuring superheat and subcooling.
The heads also include a “T” refrigerant line connector.
The new accessory heads work with all of Fieldpiece’s modular instruments.
They slide on to any of the HS30 series stick meters. The ASX14 and ASX24
heads can also be used with the data logger to record measurements over time.
When used with the Fieldpiece Electronic Handle, EHDL1, the accessory heads
become a standalone tool. They also connect to most DMMs using Fieldpiece's
AHDL1 adapter handle.
ABOUT SUPERHEAT
Measuring superheat is important because it can prevent damage to the air
conditioner and make it run more efficiently. Superheat is the difference
between the boiling point temperature of the refrigerant in the evaporator
coil and the actual temperature of the refrigerant (gas) as it leaves the
evaporator. After boiling, the refrigerant continues to warm up. The number
of degrees it “warmed up” after boiling is called the superheat.
Under worst case conditions (low load), 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 AC manufacturers
publish charts indicating what the superheat should be at a given indoor wet
bulb measurement and outdoor air temperature. If the superheat is too high,
the air conditioner will be inefficient. If superheat is too low, you risk
flooding the compressor. You can change the superheat by adding or taking
away refrigerant.
Measuring superheat is the 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 is too low, remove refrigerant. Using superheat to determine proper charge
enables an air conditioner to deliver the best reliability and the best efficiency.
Fieldpiece Instruments, Inc. was formed in 1989 to provide instruments and
instrument kits for field service technicians. Fieldpiece designs products
and assembles instrument kits in the U.S. Kit components are manufactured
in the U.S. and overseas.
Fieldpiece
Instruments, Inc.
580 W. Central, Suite A
Brea, CA 92821
(714) 257-9060 FAX (714) 257-9069
fporders@fieldpiece.com