User manual

H61.0.3X.6C-01 User’s Manual GMH 3181-… page 9 of 16
7.1.3 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.
7.2 Sea Level Correction (only for GMH 3181-12 )
The device displays the absolute pressure measured at the sensor. This is not necessarily the same like the
values given by weather stations! The weather stations‘ values are giving the pressure at sea level. Usually
the sensor is placed above sea level and therefore, if the value at sea level(zero) is to be measured, the
pressure loss resulting from the actual level above sea level has to be considered! To correct the measuring
display activate the „Sea-Level-Function“ (SL, p.r.t. chapter 6Fehler! Verweisquelle konnte nicht
efunden werden.). Then enter the altitude above sea level of the sensor‘s location in meters (Alti, p.r.t.
chapter 6). When activated, the display shows the SL-arrow and the device displays the pressure value at
sea level.
7.3 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).
7.4 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.
7.5 Alarm
There are three possible settings: Alarm off (AL. oFF), on with horn sound (AL. on), on without horn sound
(AL. no.So).
Following conditions will display an alarm, when the function is activated (on or no.So):
- Value is below lower (AL. Lo) or above upper alarm rail (AL.Hi).
- Sensor error (Sens Erro)
- Low battery (bAt)
- Fe 7: System error (always with sound)
In case of an alarm and when polling the interface the prio-flag is set in the returned interface message.
7.6 Real Time Clock
The real time clock is used for the logger function: Recorded values are also containing the point of time,
when they were measured. Please check the settings when necessary.
If the battery was replaced the referring menu ‚CLOC‘ will automatically be started.