METIS M311 / M322 / H311 / H322 (17-pin)
SensorTools Software
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Data mode:
- ASCII mode:
The pyrometer always transfers separate readings to the software and shows each
in the graph as a pixel. In addition to the transmission of measured values, also regularly status
values are transmitted (limit contacts or active laser targeting light...), so that measured values do
not always arrive at the same time interval.
For most applications this speed is sufficient, a modern PC can transmit every 5 ms a value at 921
Kbits.
- Buffer mode:
Measurement data are temporarily stored in the internal pyrometer-buffer and peri-
odically transferred to the software in blocks. The buffer interval defines how fast the internal FIFO
buffer of the pyrometer is filled. The shorter the time, the more data per communication block will
be transferred.
An interval time set too fast in relation to the baud rate and computing power leads to buffer over-
flows, which are represented by vertical bars in the graph. A modern PC reaches intervals of about
0.3 ms at 921.6 Kbits without buffer overflow, at 57 Kbits intervals of approximately 3.6 ms. If buff-
er overflows occur, the interval time can be increased, the baud rate can be increased or unneces-
sary programs and background services be stopped. A minor impact also has the reduction of the
maximum data records in memory (see under
Graphs
7.2.3.5 Single-Point Adjustment
The
single-point adjustment function
is used to readjust the pyrometer to a
mainly used measuring temperature.
The function can be used, e.g. to compensate optical losses in measurements through windows or
lenses with unknown transmittance (for example, when coupling the pyrometer into a laser beam deliv-
ery system).
For this purpose, the pyrometer has to be aligned to a calibration source with this required temperature
or a portable calibration source is positioned at the measuring point and the adjustment function is car-
ried out.
This function adjusts the pyrometer to one specific temperature and ensures accurate measure-
ments in the range around this temperature.
With factory calibration (delivery status), the pyrometer is calibrated and adjusted at several
temperatures. Therefore, measurements in the entire measuring range are more accurate with
the original factory calibration.
Preparation:
-
Align the pyrometer to calibration source
-
Enter the calibration temperature (the calibration temperature should not be directly at the begin-
ning of the temperature range, preferably about 20% of full scale above the start of temperature
range).
Display of current status:
-
: A red arrow indicates the current step that requires a user’s action.
-
A spinning animation shows the currently being processed step.
-
A green checkmark signalizes the successful completion.
-
The procedure can be canceled at any time by clicking on "Cancel", then the device is reset to fac-
tory calibration.
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Clicking on the help question mark will open a help text to the right.