WIKA CTM9100-150 - Handbuch (Seite 17)

17 WIKA operating instructions, models CTD9100, CTB9100, CTM9100
11263911.02 05/2014 GB/D
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4. Design and function / 5. Transport, packaging and storage
4.8 Data interface
The instruments are fitted with an RS-485 communications
interface. Via this interface one can connect to a PC, level
converter or a network.
The software protocol used is a MODBUS-RTU protocol,
which is used in may monitoring programs available on the
market.
The transmission speed (baud rate) is factory set to 9,600
baud. Upon request, other data transmission rates are possi-
ble.
The 5-pin socket has two pins, A and B, that you connect to
the corresponding connections on the PC, level converter or
network.
The minimum requirements for operation with a USB convert-
er are:
■ IBM compatible PC
■ Installed operating system, Microsoft ® Windows ® 98 SE,
ME, 2000, XP (Home or Prof.) or 7
■ A USB interface (USB 1.1 or USB 2.0)
A network connection enables the connection of up to 32
calibrators/micro-baths on the same network.
To connect to a network, some factory setting is required. For
this, please contact the supplier or WIKA directly.
For access to the programming via the
keypad while the serial interface is commu-
nicating, the message “buSy” appears on
the display, and therefore indicates that it is
in an “occupied” state.
4.9 Interface protocol
The interface protocol is available on request for delivery as a
specific additional document.
4.10 Protective earth monitoring
CAUTION!
The calibrator is fitted with a protective earth
monitor to keep a check on the base isola-
tion of the heater. The monitoring unit works
independently of the the normal controls
and switches off the heating power supply
as soon as the calibrator no longer has a
connection to the protective earth system of
the isolation.
Once reconnected to the protective earth
system, the monitoring unit automatically
switches the power supply back on to the
heating circuit.
Plan view of the 5-pin panel socket
5. Transport, packaging and storage
5.1 Transport
Check the calibrator or the micro calibration bath for any
damage that may have been caused by transport.
Obvious damage must be reported immediately.
5.2 Packaging
Do not remove packaging until just before mounting.
Keep the packaging as it will provide optimum protection
during transport (e.g. change in installation site, sending for
repair).
5.3 Storage
Permissible conditions at the place of storage:
■ Storage temperature: -10 ... +60 °C
■ Humidity: 30 ... 95 % relative humidity (no condensation)
Avoid exposure to the following factors:
■ Direct sunlight or proximity to hot objects
■ Mechanical vibration, mechanical shock (putting it down
hard)
■ Soot, vapour, dust and corrosive gases
■ Potentially explosive environments, flammable atmos-
pheres
To connect to a PC, the RS-485 signal must be externally
converted to an RS-232 or USB signal. The appropriate
converter, including drivers, is available as an option. The
computer records all operational data and allows program-
ming of all calibrator configuration parameters.