TESTO 557, Instruction Manual

Page: 7 / 28

3 Specifications
7
Feature Values
Resolution Resolution pressure: 0.1 psi / 0.01 bar /
1 kPa / 0.001 MPa
Resolution temperature: 0.1 °F / 0.1 °C /
0.1 K
Vacuum resolution: 1 Mikron (from 0 to 1000
Mikron) 10 Mikron (from 1000 to 2000
Mikron) 100 Mikron (from 2000 to 5000
Mikron) 500 Mikron (from 5000 to 10000
Mikron) 5000 Mikron (from 10000 to 20.000
Mikron)
Accuracy (nominal
temperature 71.6 °F
/ 22 °C) Pressure: ±0.5% of final value (±1 digit)
Temperature (-40…302 °F/-40…+150 °C):
±0.9°F (±1 digit), ±0.5 °C (±1 digit)
Vacuum: ±(10 10% v. Mw.) (100 ...
1.000 Mikron)
No. of refrigerants 60
Selectable
refrigerants No refrigerant, R11, R12, R22, R123,
R1234ze, R125, R13B1, R134a, R14,
R142B, R152a, R161, R23, R227, R290,
R32, R401A, R401B, R401C, R402A,
R402B, R404A, R406A, R407A, R407B,
R407C, R407D, R407F, R408A, R409A,
R410A, R411A, R412A, R413A, R414B,
R416A, R417A, R420A, R421A, R421B,
R422A, R422B, R422C, R422D, R424A,
R426A, R427A, R434A, R437A, R438A,
R502, R503, R507, R508A, R508B, R600,
R600a, R718 (H2O), R744 (CO2) (only in
permissible measurement range up to
60 bar), R1234yf
Measurable media Measurable media: all media that is stored in
the testo 557. Not measurable: ammonia
(R717) and other refrigerants which contain
ammonia
Ambient conditions Operating temperature: -4…122°F
/ -20…50°C
-10 ... 50°C / 14 ... 122 °F (Vacuum)
Storage temperature: -4…140°F / -20…60°C
Humidity in area of use: 10… 90%rF