Fieldpiece ASX14 - Superheat & Subcooling Accessory Head Manuel d'utilisateur télécharger pdf

AUTO-

OFF

T/C

Cal

STABLE

Pressure

Tem p

SH or SC

LO BATT

Air

Conditioner

Superheat

and Subcooling

ENGLISH

METRIC

R22

R410A

Set

ATM

ASX14

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

LO BATT

Air

Conditioner

Superheat

and Subcooling

ENGLISH

METRIC

R22

R410A

Set

ATM

ASX14

AUTO-

OFF

T/C

Cal

STABLE

Pressure

Temp

SH or SC

LO BATT

Air

Conditioner

Superheat

and Subcooling

ENGLISH

METRIC

R22

R410A

Set

ATM

ASX14

AUTO-

OFF

T/C

Cal

STABLE

Pressure

Temp

SH or SC

LO BATT

Air

Conditioner

Superheat

and Subcooling

ENGLISH

METRIC

R22

R410A

Set

ATM

ASX14

AUTO-

OFF

T/C

Cal

STABLE

Pressure

Temp

SH or SC

LO BATT

Air

Conditioner

Superheat

and Subcooling

ENGLISH

METRIC

R22

R410A

Set

ATM

ASX14

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.

v07

1 2

Conditioner 1
Superheat 1

Résumé du contenu

Page 1 - Superheat

AUTO-OFFT/CCalSTABLEPressureTem pSH or SCONLO BATTAirConditionerSuperheatand SubcoolingENGLISHMETRICR22R410ASetATMASX14SHSCSuperheat and Subcooling He

Page 2

*These charts are an example of a genericsuperheat charts for a typical fixed orifice, split res-idential system. These charts should not be usedfor

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