15.3 Notes on Specifications
Note that the temperature range of the connected Computer may be narrower than that of the
Compact15. Note also that the upper limit of 50°C (120°F) will be exceeded at a lower
ambient temperature when the unit is exposed to direct sunlight.
With respect to moisture, condensing should be avoided. Normally, this is not a problem with
the electronics operating, as the built-in temperature control dries out the unit. But if the unit
is colder than the ambient (e.g. after a cold night in a towing vehicle), condensing can occur,
and if problems are observed, the electronics has to be kept switched on for a while to dry out
the box. Condensing moisture may result in a wrong load cell shunt calibration value and/or
amplifier offset(s), which will be detected as “excess vibration or drift”.
15.4 Switch ON
The Compact15 contains an Embedded PC. The sequence of events when the system is
powered is as follows:
1. BIOS initializes the standard PC components.
2. DOS boots up and initializes the network drivers.
3. A “Stand-Alone” program named CP15BOOT starts (sounds a short beep).
4. When CP15BOOT detects the Host computer, then it request a connection.
5. When DDC has established the connection, then Compact15 starts the main
embedded program named CP15MAIN (sounds another short beep).
Step one and two above lasts approximately 30 seconds.
CP15BOOT starts by sounding a short beep. After that, the manual buttons are operable.
The whole boot process and the output of both CP15BOOT and CP15MAIN can be observed
by running a terminal program with a Null-Modem cable from Compact15 COM1 to the Host
PC (or any other PC running a terminal program).
15.5 Setup and Diagnostics
Compact15 is usually delivered set up and ready for use with the appropriate field computer.
In the event that you need to run the system with another computer, then the Compact15 must
retrieve the new “Computer Name” in order to establish network communication. This may
prolong the first start-up.
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