Svantek SV 973, User Manual

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SVAN 973 User Manual
– Appendixes
195
RS 232 interface (optional)
The RS 232 interface option for SV 973 is provided by means of the SP 75 interface. It conforms to the EIA
Standard RS 232C. It enables the user to programme remotely all instrument functions and the transmissions
to and from the meter with the speed from 1200 bit/s to 115200 bit/s.
Note: The SP 75 must be connected to the SV 973 USB port and proper operation of this port
has to be set-
up in the instrument’s SETUP Menu before!
The SP 75 - DB 09 F - pin female connector pin-out is given below.
Table C.17 SP 75 interface description
PC RS 232,
9 - pin connector
Signal name
SP 75 connector
(DB 09 F)
Pin number
1
– LSD
1 (not connected)
2
– RXD
3
3
– TXD
2
4
– DTR
6 connected to pin 4
5
– GND
5
6
– DSR
4 connected to pin 6
7
– RTS
8
8
– CTS
7
9
– GND
9 (not connected)
Power Supply
Instrument is dedicated for the operation from the internal four replaceable AAA batteries. Power consumption
from the 6V source is approx. 40 mA (at + 20

C). So, typical operating time from 4 x AAA alkaline batteries
will be about 20 hours . Measurements with the display off extend the working time to more than 30 h.
SV 973 can be also powered from the AAA Class rechargeable batteries.
Note: For the temperatures below 0

C operating time can decree (depending on the batteries)!
Real Time Clock
Built-in real time. Accuracy better than 1 minute/month.
Wireless Bluetooth 4.2 Connectivity
This dosimeter supports wireless connection via Bluetooth® 4.2 (Low energy). This connectivity
is compatible with mobile and PC devices that support Bluetooth® 4.2.
•
TX power: up to 8 dBm
•
Receiver sensitivity: -90 dBm
•
Range: typically >50m line-of-sight and depending on local RF conditions.