![TESTO AG 400 Instruction Manual Download Page 24](http://html.mh-extra.com/html/testo-ag/400/400_instruction-manual_1092560024.webp)
47
46
Current and voltage can be measured with the 0554.0007 probe.
Note! If 2 probes are connected the signals must refer to the same reference potential. A
difference in potential is not permitted.
A different physical variable can be allocated to these signals in the main menu under
PROBE
-
S
CALING
(See selection list). A separate configuration is possible for both probe connection
sockets.
Scaling occurs once the channel and unit (confirm with
) have been selected:
e.g.: 0 to 20 mA should later correspond to 0 to 100 %RH in the
display.
The right and left function buttons select the values,
or
positions the cursor on the digit required, the digit is changed with
and
. The middle function button changes the previous
character. Scaling is confirmed by pressing
.
Number of digits after decimal point:
None / one / two, can be set via function button
“0-->0,0”.
Current/voltage measurement
mA
00.0.........20.0
0000............0100
%
+/-
rpm measurement
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).
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
→
Page 12).
→
→
Changing the pressure unit:
, go to Main menu under
INSTRUMENT - U
NITS
- Pressure.
The following can be
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
MOOTH
, each separately for the two probe
sockets.
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.
Pressure measurement
i
Function buttons