Intended Purpose - TESTO 6440 Instruction Manual

Intended purpose

The instrument records the norm volume flow of the working com-
pressed air according to the calorimetric measurement principle
(norm volume flow according to ISO 2533, i.e. volume flow at 1013
hPa, 15 °C and 0 % relative humidity.
• Use in working compressed air systems. The general operating
conditions of compressed air systems apply.
• The quality class of the the working compressed air influences the
accuracy of the measurement:
Quality class acc.
to ISO 8573-1
1-4-1
3-4-4
Display
Signal
output
34
Measurement inaccuracy
± (3% of meas. value + 0,3% of meas. range final value)
± (6% of meas. value + 0,6% of meas. range final value)
• Current volume flow in Nm
1 or 2 lights up.
• Current consumption quantity in Nm
ween 0.001 m
1/1000 of the value is displayed and the LED 10
that it must be multiplied by a factor of 1000.
• Consumption quantity before the last reset in Nm
the display of this value, LED 3 flashes.
• Current media temperature in °C. LED 4 lights up.
The display unit is set by programming (→ page 12 ff). It can
be temporarily changed in measurement mode (briefly press
the "Set" button).
Output 1 (3 selection possibilities programmable)
• Switch signal: Limit value for volume flow; hysteresis or win-
dow function; closer or opener, cf. page 19 f.
• Pulse sequence for quantity counter: Output 1 gives a
counting pulse every time a set flow rate is reached, cf.
page 22 f.
• Switch signal for pre-selection counter (for time-dependant
or non-time-dependant quantity monitoring.
Output 2 (2 selection possibilities programmable)
• Switch signal: Limit value for volume flow; hysteresis or win-
dow function; closer or opener, cf. page 19 f.
• Analog signal (4...20 mA) for volume flow, cf. page 22 f.
3
/h or Nl/min (4-digit display). LED
3 3
and 4000*10
3
(4-digit display bet-
3
m , at values > 9 999 m
3
,
3
indicates
3.
During