Pressure Measurement; Rpm Measurement - TESTO 400 Instruction Manual

Once a pressure probe has been connected and the measuring instrument has been switched on
the pressure value is displayed with the unit set in the measuring instrument.
The display depends on the position of the pressure probe. Therefore the probe should be put into
position before the measurement and initialise the display via the "hPa=0" function button (assignment
of function buttons
Changing the pressure unit:
, go to Main menu under INSTRUMENT - U
selected: hPa, inch water column, mbar, Pa, bar, psi and mm water column.
If the probe´s measuring range and unit are badly combined, the display can fluctuate to
an extreme degree (e.g. 100 hPa probe and Pa unit with 0.01 resolution).
If the readings fluctuate to an extreme degree a smoothing of the values measured is recommended.
Smoothing is activated under PROBE - S
The number in the display stands for the level of smoothing, the middle function button contains the
corresponding unit (this can be changed via the middle function button). For example
"n =2 ... 10" stands for a sliding mean calculation of up to 10 measuring cycles. "sec = 2..10"
stands for a sliding mean calculation of up to 10 seconds. "Off = 1" means original values,
smoothing is deactivated.
Using the 0640.0340 probe you can measure the rpm of shafts and rotating parts. The caliper is in
the form of a mechanical sensor (cone) on the rotation axis. The running wheels show the rotational
speed of the surface point in m/s or ft/min (Note! The unit shown is still rpm!)
Note on running wheel:
Display in rpm. The displayed value corresponds to speed in mm/sec.
Example:
1000 rpm is displayed. This value is equal to a speed of 1000 mm/sec (1 m/s).
Page 12).
MOOTH

Pressure measurement

- Pressure. The following can be
NITS
, each separately for the two probe sockets.
46

rpm measurement