User Manual

5 Using the manifold
14
- The display illumination will flash if:
• The critical pressure of the refrigerant is within 15 psi (1 bar) of
the highest pressure (and temperature) where the refrigerant can
still condense
• The maximum. permissible pressure of 870 psi (60 bar) is
exceeded.
Key functions for 550 or 549 when used with optional probes
> Press
[▲] or [▼] to change the reading in the display.
(The temperature probes must be connected.)
Possible display combinations:
Refrigerant evaporation
temperature Ev/to (°F/°C)
Evaporation pressure
(psi/bar)
Refrigerant condensation
temperature Co/tc (°F/°C)
Condensation pressure
(psi/bar)
Measured temperature T1/t
oh
(°F/°C)
Evaporation pressure
(psi/bar)
Measured temperature T2/t
cu
(°F/°C)
Condensation pressure
(psi/bar)
Superheating SH/Δt
oh
(°F/°C)
Evaporation pressure
(psi/bar)
Subcooling SC/Δt
cu
(°F/°C)
Condensation pressure
(psi/bar)
With both NTC temperature probes connected, Δt is also shown.
>
Press [Mean/Min/Max] to display min./max. readings and
mean values.
Changeable
- Evaporation
Temperature (Ev)
- Measured
Temperature (T1)
- Superheating (SH)
Changeable
- Condensation
Temperature (Co)
- Measured
Temperature (T2)
- Subcooling (SC)
Condensation
pressure
Evaporation
pressure