Monarch Instrument DC1250 - Manual (Page 35)

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The connection can be tested by using the DOS Command Box and pinging the units. At
the DOS prompt type: Ping 192.168.0.210 (use the IP address you set).
If the connection is good you will see a series of replies from the recorder. If you cannot
connect, try pinging the address with the recorder disconnected from the Ethernet. If you
get a reply, there is another device with that IP address. Change the IP address on the
recorder.
There are two methods of connecting to the recorder over the Ethernet - Browser
connection and Navigator Software.
Browser connection
Launch your browser (Internet Explorer preferred
– V6 or later).
You need to ENABLE ACTIVE X and JAVASCRIPT. (From the browser toolbar, select
TOOLS then INTERNET OPTIONS then SECURITY. Select CUSTOM LEVEL and choose
MEDIUM LOW or adjust the settings manually).
Enter the Recorder IP address into your browser and click GO. You should see a picture of
the Recorder and the data should update at a 3 to 5 second update rate depending on
Ethernet traffic and recorder chart speed (slower chart speeds will result in faster updates
over the Ethernet.) Note that the browser shows the recorder status in real time.
Navigator Software
The Navigator software enables the user to fully interact with the recorder over the
Ethernet. You can alter settings, stop and start recording, download data in real time for
plotting or archiving on the PC, and you can download historic data files.
Refer to the Navigator Software manual for additional information.
5.3 CALIBRATION
Before leaving the factory, the recorder is calibrated using NIST traceable sources. The
calibration values are stored in non-volatile memory. The unit is calibrated to meet
specification but the user may wish to re-calibrate the unit, or calibrate specific input ranges
for increased accuracy.
Calibration is the process of “fine tuning” each input for various differences that may arise
due to manufacturing processes, gain errors, temperature offsets and other physical
parameters. Real analog to digital (A/D) converter values are corrected by first adding an
offset correction value, nominally zero, to the reading to correct for offsets from zero, and
then multiplying it by a span correction value that's nominally 1 to correct for gain errors.
Calibration setup can be found in the Channel x Setup Menu (x = A or B) under the
ADVANCED SETUP menu options. Each channel needs to be calibrated independently.
There are four options on the calibration menu:
CAL ZERO adjusts the offset correction above or below actual 0 (zero), in steps
equal to the resolution of the A/D converter itself.
SPAN adjust a span correction value above or below actual 1, also in small
amounts.
CAL NOM Calibrate Nominal - depending on the input range selected, either
resets the correction values to 0 and 1, or copies those values from the
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