The Testo 550 is a high-performance refrigeration system analyzer that accurately performs temperature
and pressure measurements in seconds. It automatically calculates superheat and subcooling for 31 different
refrigerants quickly and easily. Testo 550 analyzers are simple enough to use right out of the box and rugged
enough for daily use by today's demanding HVAC technicians.
The Testo 550 analyzer features a 2-way aluminum valve block with 3 x 1/4" SAE connections, built-in
magnifying sight glass, 2 NTC temperature probe inputs, real-time calculation of superheat and subcooling,
and 31 refrigerant profiles for PT calculations. The Testo 550 has a fast response time, compact design,
and a large, easy-to-read, backlit display.
The Testo 550 can be used to service, maintain and commission all types of air conditioning, refrigeration
and heat pump systems including the newest 16 SEER systems. This Testo refrigeration system analyzer can
perform timed pressure drop tests as well as standing pressure tests required for properly commissioning AC/R
systems.
The Testo 550 ships complete with meter, clamp temperature probe, integrated hanger-hook, built-in hose holders,
4 AA batteries and calibration certificate. The optional kit also includes an additional clamp temperature probe
and hard case.
| Testo 550 Refrigeration System Analyzer Specifications |
| Number of refrigerant profiles |
31 |
| Pressure measurement range |
-14.7 to 580 psi |
| Vacuum indication |
0 inHg to 29,92 inHg |
| Units of measure |
°F, °C, psi, inHg, bar, kPa, MPa |
| Resolution pressure |
0.1 psi |
| Accuracy pressure sensor |
±0.75% fs (+1 digit) |
| Pressure media |
HCFC, HFC, N, H2O |
| Temperature |
2x NTC ports |
| Temperature accuracy |
±1.8°F (+1 digit) |
| Valve block configuration |
2-way valveblock with 3 hose connections |
| Display illumination |
Yes |
| Power supply |
(4) AA |
| Battery life |
Min. 40 h (without illumination) |
| Ambient operating temperature |
-14 to 122°F |
| Measurement cycle time |
0.5 seconds |
