4 Transmitter
16
4.2.6. Analog outputs
As analog outputs, the testo 6383 has either
• 1 or optionally 3 current outputs of 0 to 20 mA (4-wire)/4 to
20 mA (4-wire) or
• 1 or optionally 3 voltage outputs of 0 to 1 V/0 to 5 V/0 to 10 V
(4-wire).
The transmitter can be ordered with three analog outputs as an
option.
The optional three channels are galvanically isolated.
4.2.7. Parameters
The following parameters are displayed
• Differential pressure in Pa, hPa, kPa, mbar, bar, mmH
2
O, inch
H
2
O, inch HG, kg/cm
2
, PSI
• Relative humidity in % RH (technical)
• Relative humidity in % WMO* (calculation according to the
WMO standard)
• Degree of humidity in g/kg and gr/lb
• Absolute humidity in g/m³ and gr/ft³
• Water content in ppm (vol) and % vol
• Psychrometer temperature in °C
tw
and °F
tw
• Enthalpy in kJ/kg and BTU/lb
• Water vapour partial pressure in hPa and inch H
2
O
• Dewpoint temperature in °C
td
and °F
td
• Standardized dewpoint in °C
tdA ,
standardized at atmospheric
pressure (1013 hPa); precondition: Absolute process pressure.
• Dewpoint of H
2
O
2
mixture in °C
tm
and °F
tm
• Mixture humidity H
2
O
2
in %RH
m
.
* It is possible that condensation appears as of a displayed
humidity starting from 70 % and is shown on the display. This
unit is used in meteorology, amongst others. When calculating
the relative humidity the Magnus coefficient with undercooled
water is used in accordance with WMO.
Calculated humidity variables correspond to the medium of
air. With other gases/gas compositions, deviations may
occur, e.g. with the enthalpy.
• Temperature °C and °F
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