Voltcraft K204 Datalogger®Temperature meter, thermometer 309 Data Sheet
Product codes
309
1. baudrate 9600, no parity, 8 data bits , 1 stop bit
2. for example, after sending A command, receive 45bytes from b/n 100518.
1
rd
BYTE must to be 02
2
nd
BYTE
80=10000000
bit 0=0 not in REC mode(it can’t use in b/n100806)
bit 2 & bit 1 =00 normal mode(no max/min)
bit 3 =0 that means not in the type of T1-T2
bit 4 =0 not in REL mode
bit 5 =0 not in HOLD mode
bit 6 =0 battery is not low
bit 8=1 C
3
rd
BYTE:
06=00000110
bit 0= 0 Memory is not full (it can’t use in b/n100806)
bit 1
bit 2
bit 3
bit 4
bit 5
bit 6
bit 7=1 1 in auto power off mode
It can’t use from the fourth to the seventh.
In generally, the byte from 8
th
to 15
th
as below:
8
th
and 9
th
byte is the value of channel 1 ,00 EF is hex, decimal is 239, divide by 10 is 23.9
10
th
and 11
th :
byte is the value of channel 2.
12
th
and 13
th :
byte is the value of channel 3.
14
th
and 15
th :
byte is the value of channel 4.
In the type of
REL, the byte from 16
th
to 23
th
.
In the type of
MIN, the byte from 24
th
to 31
th
.
In the type of
MAX, the byte from 32
th
to 39
th
.
40
rd
BYTE: In generally, per channel become OL, should be see the byte as below:
0E=00001110