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Operating instructions

ManualsBrandsUNI-T ManualsPower ToolsUT3000 series
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9. Communication with external data acquisition system (option) page 91
9. Communication with external data acquisition system
(option)
The UT-3000 is prepared for connecting to an external data acquisition system. In this case the
data acquisition system will be the master and the UT-3000 the slave. The master can send
queries and commands. Results of measurements, calibration, and the set parameters can be read
out, a zero check and a span check will be carried out on demand.
9.1 Parameter settings for remotely triggered zero and span check
In order to prepare the system for a remotely triggered zero check and span check the parameters
shown in the table below have to be set.
Parameter Value
Service Code 777 Automatic Calibration Module ON
Service Code 999 F2- Span Calibration activated
Span Calibration Menu Time Interval for Span Check: 0
9.2 UT- 3000 external data access (version 04.05.2004)
Parameters, status and logger data can be transferred to an external master via the USB/RS232
port.
The UT-3000 software controls this port port regularly and in the case of an inquiry the data are
transmitted immediately.
The actual cycle of the UT-3000 is generally not interrupted during data handling and has
priority.
The actual measurement cycle will be terminated if a span check or zero check command is sent
to the UT-3000.
External transmission and data handling is only possible, when the UT-3000 is in the
automatic measuring mode. Otherwise the USB/RS232-port is not controlled.
RS232 parameter setting: 38 400 baud, 8 data bits, 1 stop bit, no parity
All data are ASCII-Characters, between the characters is a semicolon (;)
Telegram for inquiry and transfer (without logger data transfer):
<STX>;command type; command ;<CRC>;<ETX>
<STX> 1 Byte Start of text (02Hex)
; 1 Byte separator semicolon
command type 1 Byte inquiry logger or status or parameter or system control
command 1 Byte
<CRC> 5 Byte Checksum CRC16, max. 5 bytes
<ETX> 1 Byte End of text (03Hex)
If the checksum is wrong, the UT-3000 answers: