Fieldpiece ASX14 - Superheat & Subcooling Accessory Head - Manual

AUTO- OFF
T/C
Cal
STABLE
Pressure
Temp
SH or SC
ON
LO BATT
Air
Conditioner
Superheat
and Subcooling
ENGLISH
METRIC
R22
R410A
Set
ATM
ASX14
SH
SC
Superheat and
Subcooling Head for
R22 and R410A
with pipe clamp
thermocouple
Model: ASX14
OPERATOR’S MANUAL
Description
The model ASX14 superheat and subcooling
accessory head measures refrigerant pressure and
temperature simultaneously. It then calculates and
displays superheat or subcooling. It has a 1/4”
industry standard fitting for actual pressure. A pipe
clamp thermocouple is included for temperature.
Select R22 or R410A. Select superheat or subcool-
ing.Select english or metric units.
Use it your way
EHDL1 AHDL1 w/ Meter DL3 HS30
How to use
1. Connect to COM and Volts jack. Slide ASX14
superheat head onto Fieldpiece "stick" meter,
data logger, electronic handle or connect to
most other meters using Fieldpiece ADLS2
deluxe test leads or AHDL1 handle.
2. Set meter to mVDC range.
3. Calibrate if needed (see Field calibration)
4. Hand tighten 1/4” flare to suction line or liquid
line as close to the evaporator or condenser as
possible using an EPA approved service hose
(not included).
5. Select superheat or subcooling, refrigerant (R22
or R410A) and units (English or metric).
6. Connect the pipe clamp to the suction (super-
heat) or liquid (subcooling) line at least six inch-
es from the condenser and slide it under the
insulation for best accuracy isolating the pipe
clamp from the ambient air (pg. 2).
7. Select parameter to display (superheat, sub-
cooling, pressure, or temperature).
8. You must wait until the system you are testing
has stabilized. The STABLE LED lights when
the reading is stable.
9. Disable Auto-off to data log any of the above
parameters with the DL3 data logger.
10. Once you have the superheat or subcooling
reading follow the manufacturer of the air condi-
tioner’s specifications to properly charge or
diagnose the system.
Field calibration
Temperature: To calibrate the system (ASX14,
pipe clamp thermocouple, meter), adjust the cali-
bration pot underneath the rubber covering while
measuring a known temperature. Ice water is 32°F
(0°C) and is readily available.
1. Stabilize (by repeated stirring) a large cup of ice
water.
2. Select temperature on ASX14, plug in the pipe
clamp thermocouple and then immerse entire
clamp into the ice water (keep stirring).
3. Adjust the calibration pot to read 32.0 (0.0 if
using °C) on the DMM for optimum accuracy at
room temp.
Pressure: The pressure/vacuum reading prior to
connecting to an A/C system should always be
zero. If you see that you’re getting pressure read-
ings of something other than zero without your serv-
ice hose attached, you need to set atmospheric
pressure before connecting the ASX14 to the sys-
tem. To set atmospheric pressure, press the button
underneath the rubber covering entitled “Set ATM”.
You usually have to set atmospheric pressure each
time you dramatically change elevations. For exam-
ple, if you “Set ATM” in Denver and take a pressure
reading of an A/C system in Los Angeles, the pres-
sure reading in Los Angeles will be lower than it
actually is.
OFF
2000
AUTO- OFF T/C
Cal
STABLE
Pressure Temp SH or SC
ON
LO BATT
Air Conditioner Superheat and Subcooling
ENGLISH
METRIC
R22
R410A
Set
ATM
ASX14
SH
SC
AUTO- OFF T/C
Cal
STABLE
Pressure Temp SH or SC
ON
LO BATT
Air Conditioner Superheat and Subcooling ENGLISH
METRIC
R22
R410A
Set
ATM
ASX14
SH
SC
AUTO- OFF T/C
Cal
STABLE
Pressure Temp SH or SC
ON
LO BATT
Air Conditioner Superheat and Subcooling
ENGLISH
METRIC
R22
R410A
Set
ATM
ASX14
SH
SC
AUTO- OFF T/C
Cal
STABLE
Pressure Temp SH or SC
ON
LO BATT
Air Conditioner Superheat and Subcooling
ENGLISH
METRIC
R22
R410A
Set
ATM
ASX14
SH
SC
SPECIFICATIONS
Operating environment: 32ºF to 122ºF; 0ºC to
50ºC at <75%RH
Allow ~5 min. for ASX14 to come to ambient temp.
Storage environment: -4ºF to 140ºF; -20ºC to
60ºC at <80%RH with battery removed.
Battery life: 25 hours typical. No measurable
current draw when in "off" position.
Low battery indication: Red LED lights
Battery: 9V
Auto off: Approx. 15 minutes
Overloads: The ASX14 outputs 3.4V when tem-
perature or pressure is outside of their working
range (overloaded). For ranges below
3400mVDC, the normal overload symbol will be
displayed on the meter (“OL”). For ranges
above 3400mVDC, reading displayed will be
approximately 3.4VDC.
Stated Accuracy: at 73°F ± 9°F (23°C ±5°C) ,
<90% R.H.
Temperature
Range (temperature): -40ºF to 400ºF;
-40ºC to 204ºC
Resolutions: 0.1º
Sensor type: k-type thermocouple
Pipe clamp thermocouple accuracy: ±4ºF
(±2°C) or ±0.75%, whichever is greater, -30ºF to
200ºF (-34°C to 93°C)
System accuracy: ±1ºF;±0.06ºC @ 73ºF ± 5ºF
after ice water calibration (see Field calibration).
Pressure and vacuum
Working range (pressure):
0 to 500 psi; 0 to 4000 kPa
Max displayed pressure: 800psi (5500 kPa)
Working range (vacuum):
29”Hg vac. to 0; 74cmHg vac. to 0
Vacuum will show up as negative value on meter.
Resolutions: 0.1psi or kPa, 0.1”Hg or cmHg vac.
Accuracy:
0 to 200 psig, ±1 psi, 0 to 1378 kPa ±6.9 kPa;
200 to 500 psig, 0.3% ±1 psi, 1378 to 3447 kPa
0.3% ±6.9kPa
Sensor breakdown pressure: 800psi (5500 kPa)
Superheat
Range (temperature): 0ºF to 80ºF; 0ºC to 27ºC
Resolutions: 0.1º
System Accuracy: ±1ºF @ 73ºF ± 5ºF (±0.06ºC
@ 23°C ±3°C) after calibration (see Field cali-
bration).
Subcooling
Range (temperature): 0ºF to 80ºF; 0ºC to 27ºC
Resolutions: 0.1º
System Accuracy: ±1ºF @ 73ºF ± 5ºF (±0.06ºC
@ 23°C ±3°C) after calibration (see Field cali-
bration).
Warranty
The ASX14, Superheat and Subcooling accesso-
ry head is warranted against manufacturer’s defects
for one year. This warranty does not apply to
defects resulting from abuse, neglect, accident,
unauthorized repair, alteration, or unreasonable use
of the instrument. Any implied warranty arising out
of the sale of Fieldpiece's products including but not
limited to implied warranties of merchantability, and
fitness for purpose, are limited to the above.
Fieldpiece shall not be liable for incidental or con-
sequential damages.
Service
Return any defective ASX14 to Fieldpiece for
warranty service along with proof of purchase.
Contact Fieldpiece for out of warranty repair
charges.
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