User manual

H49.0.02.6C-07 User’s Guide GMH 3750 page 9 of 16
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7.4 User Sensor Curve ('Lin USEr')
By means of this function besides the standard conversion of resistance to temperature following
EN60751(Lin E.751) also other curves can be used. The user sensor curve can be read and edited by the
configuration software GMHKonfig. The standard setting ex works is also set to the EN60751 data. The
curve is defined by a table with two columns (input resistance[Ohm]/output temperature [°C]) with 50 rows.
Info: the sensor curve following EN60751 uses the international temperature scale ITS90 and following
formulas:.
Temperatures < 0°C:
R
neg
(T) := 100 · [1 + 3.9083·10
-3
·T – 5.775·10
-7
·T
2
– 4.183·10
-12
·(T – 100)·T
3
]
Temperatures >= 0°C:
R
pos
(T) := 100 · (1 + 3.9083·10
-3
·T – 5.775·10
-7
·T
2
)
Please notice: Temperature measurements with the user sensor curve are allowed only within the
temperature range which has been used to generate the user sensor curve.
Measuring with activated user sensor curve beyond the checked temperature range may lead to
larger errors. Therefore the sensor curve acc. to EN 60751 (Lin E.751) has to be used for
temperature measurements beyond the checked temperature range.
7.5 Real Time Clock („CLOC“)
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
8 Operation Of Logger
The device supports two different logger functions:
„Func-Stor“: manual recording via keypress “Store” (key 6).
„Func-CYCL“: automatic recording with the selected recording interval/cycle
The logger records 1 measurement result each time
The data set consists of: - measuring value at time of recording
- time and date of recording
For the read out and evaluation of the data the software GSOFT3050 (V1.7 or higher) has to be used. The
software also allows easy configuration and starting of the logger.
When the logger is activated (Func Stor or Func CYCL) the hold function is no longer available, key 6 is
solely used for the operation of the logger functions.
8.1 Storing Single Measurements („Func-Stor“)
a) Record Measuring:
If the logger function “Func Stor” was activated (see chapter 6“Configuration”), up to 99 measuring data
sets can be recorded manually.
Press shortly: Data set will be recorded (“St. XX” will be shown shortly. XX is the number of the
data set)
If the logger memory is full, the display will show:
b) Viewing Recorded Measurings:
Stored data sets can be either read out via PC Software GSOFT3050, or be viewed in the display directly.
Press for 2 seconds: The display will show:
Please note: ”rEAd Logg” only appears, if there are already data stored! If memory is empty, the
configuration menu will show.
Press shortly: Changing between measuring value and date+time of data set
or
Changing between the data sets
Exit logger data display