H61.0.34.6C-01
User’s Manual GMH3181-13
page 5 of 12
_______________________________________________________________________________________________________________________
GREISINGER electronic GmbH
Hans-Sachs-Straße 26
Fon: 0049-9402 / 9383-0
http://www.greisinger.de
D-93128 Regenstauf
Fax: 0049-9402 / 9383-33
e-mail: [email protected]
2.1 Different Kinds Of Measuring: „rAtE-Slo, -P.dEt, -FASt“
Three different kinds of measuring pressure are supported. Two of them are working with high measuring
frequency of more than 1000 measurings per second. If one of them was chosen in the configuration (see
above), this will be displayed in the secondary display: „P.dEt“ or „FASt“.
2.1.1 rAtE-Slo:
Standard
Measuring
Measuring rate 4Hz, averaging and filter functions are active.
Application: Measuring of slowly changing or static pressures, e.g. measuring of leakproofness, atmospheric
pressure...
Highest accuracy, high noise immunity (EMI and unstable measuring signals), low power consumption.
2.1.2 rAtE-P.dEt: Peak
detection
Measuring rate >1000Hz, the value is displayed unfiltered.
Application with logger function: Measuring of short pressure peaks or fast changing pressures with a
resolution of < 1 ms. The cyclic logger function records the arithmetic mean value, the highest and the lowest
peak of the refering time interval.
Attention: higher power consumption, measuring is sensitive to noise (EMI,..).
2.1.3 rAtE-FASt:
Fast filtered measuring
Measuring rate >1000Hz, the value is filtered slightly (higher noise immunity than P.dEt, small peaks will be
filtered out), apart from that identical behaviour like P.dEt.
2.2 Averaging Function
The averaging function concerns the display values (LCD and interface). It is completely independent from
the averaging of the logger function, please don’t mix them up!
The averaging integrates the measuring values during a selectable period of time and then calculates the
average display value. It is independent from the selected kind of measuring (slow, fast, peak detect)
.
As long as not enough values are collected (selected averaging time) to calculate a average value, the upper
display shows “----“, the lower display a ‘countdown‘.
During an active low-power-logging procedure the averring is always deactivated
Function of min/max-value memory during averaging:
- If averaging is activated and slow measuring is selected (rAtE-Slo), the min-/max-value memory refers to
the average display value.
- If averaging is activated and fast measuring is selected (rAtE-FASt or P.dEt) , the min-/max-value memory
refers to the internal measured values (fast peaks can be detected).
2.3 Zero Displacement Sensor ('OFFS')
A zero displacement can be carried out for the measured value:
value displayed = value measured - offset
Standard setting: 'off' = 0.0°, i.e. no zero displacement will be carried out. Together with the scale correction
(see below) this factor is mainly used to compensate for sensor deviations. Input is in the display unit.
2.4 Scale Correction Sensor ('SCAL')
The scale of the measuring can be influenced by this setting (factor is in %):
displayed value = measured value * (1+Scal/100)
Standard setting: 'off' =0.000, i.e. value is not corrected. Together with the zero displacement (see above)
this factor is mainly used to compensate for sensor deviations.
2.5 Power Off Time
If there won’t be pressed any key and no interface communication takes place for the time of the power off
time setting (P.Off), the device will be switched off automatically to save battery power.
If P.oFF = oFF then the automatic switch off is deactivated.
