3 Specifications
6
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3 Specifications
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3.1. Use
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testo 549 and testo 550 are digital manifolds for maintenance and
service work on refrigeration systems and heat pumps. They may
only be used by qualified authorized personnel.
The functions of the testo 549 and testo 550 mean they can replace
mechanical manifolds, thermometers and pressure/temperature
charts. Pressures and temperatures can be applied, adapted,
tested and monitored.
testo 549 and testo 550 are compatible with most non-corrosive
refrigerants, water and glycol. testo 549 and testo 550 are not
compatible with refrigerants containing ammonia.
The instruments must not be used in explosive environments!
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3.2. Technical data
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Characteristic Values
Parameters Pressure: kPa / MPa / bar / psi
Temperature: °C/°F/K
Sensor
Pressure: 2 x pressure sensor, temperature:
2 x NTC
Meas. cycle 0,5 s
Measurement
channels
Quantity: 4
Interfaces Pressure connections: 3 x 7/16" UNF
NTC measurement
Measuring ranges
HP/LP pressure measuring range: -100 to
6000 kPa / -0.1 to 6 Mpa / -1 to 60 bar (rel)
/ -14.7 to 870 psi
Temperature measuring range: -50 to
+150 °C / -58 to 302°F
Vacuum measuring range (rel): -1 to
0 bar / -14.7 to 0 psi
Overload 65 bar, 6500 kPa, 6,5 Mpa, 940 psi
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