This is a manual that introduces the use of testo 557 digital manifold.
This is the user manual for the Testo 557 digital manifold, designed for maintenance and service work on refrigeration systems and heat pumps. It includes safety instructions, technical specifications, product description, setup, operation, and maintenance guidelines. The device features pressure and temperature measurement, vacuum measurement via external probe, and compatibility with 60 refrigerants. It is intended for qualified personnel only and must not be used in explosive environments.
| Measurement Parameters | Pressure: psi/kPa/MPa/bar; Temperature: °F/°C/K; Vacuum: micron/inHg/inH2O/hPa/mbar/mTorr/Torr/Pa |
|---|---|
| Pressure Measurement Range | -14.7…870 psi / -100…6000 kPa / -0.1…6 MPa / -1…60 bar (rel) |
| Temperature Measurement Range | -58…302 °F / -50…+150 °C |
| Vacuum Measurement Range | 0 ... 20.000 Mikron |
| Resolution Pressure | 0.1 psi / 0.01 bar / 1 kPa / 0.001 MPa |
| Resolution Temperature | 0.1 °F / 0.1 °C / 0.1 K |
| Accuracy (nominal temperature 71.6 °F / 22 °C) | Pressure: ±0.5% of final value (±1 digit); Temperature: ±0.9°F (±1 digit), ±0.5 °C (±1 digit) |
| Number of Refrigerants | 60 |
| Operating Temperature | -4…122°F / -20…50°C |
| Housing Material | ABS / PA / TPE |
| Dimensions | approx. 280 x 135 x 75 mm |
| Weight | approx. 1200 g (without batteries) |
| IP-class | 42 |
| Battery Type | 4 x 1.5V type AA / Mignon / LR6 |
| Display Type | Illuminated LCD |
| Bluetooth Range | < 20 m (free field) |
| Bluetooth Type | L Series BLE module (08 May 2013) based on TI CC254X chip |
| RF Band | 2402-2480MHz |
| Output Power | 0 dBm |
The testo 557 is a digital manifold for maintenance and service work on refrigeration systems and heat pumps.
It is compatible with most non-corrosive refrigerants, water, and glycol, but not with ammonia (R717) or other ammonia-containing refrigerants.
The operating temperature range is -4…122°F / -20…50°C.
The Bluetooth range is less than 20 meters in free field.