Datasheet

Extech SW Protocol (All Versions)
Meter - RS232 Protocol
RS232 Format: Baud Rate: 9600, Parity: None, Data Bits: 8, Stop Bits: 1, Flow
Control: XOn/XOff (NONE)
16 digit data stream format:
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
D0 End Word
D1 to D4 Upper Display Reading; D1=LSD, D4=MSD
D5 to D8 Lower Display Reading; D5=LSD, D8=MSD
D9 Decimal Point (DP) for Upper Display
0= No DP, 1= 1 DP, 2 = 2 DP, 3 = 3 DP
D10 Decimal Point (DP) for Lower Display
0= No DP, 1= 1 DP, 2 = 2 DP, 3 = 3 DP
D11 & D12 Annunciator for Upper Display
00 = No Symbol 07 = mg/L 14 = mS
01= °C 08 = m/s 15 = Lux
02 = °F 09 = Knots 16 = FT-cd
03 = % 10 = Km/hr 17 = dB
04 = %RH 11 = Ft/min 18 = mV
05 = %PH 12 = mile/hr
06 = %O2 13 = uS
D13 Anunciator for Lower Display
0 = No Symbol 1 = C 2 = F
D14 Reading Polarity for the Display
0 = Both Upper & Lower Display Value are “+”.
1 = Upper “-“, Lower “+”
2 = Upper “+”, Lower “-“
3 = Both Upper & Lower Display Values Are “-“
D15 Start Word
Meter End PC End
3.5mm phone plug 9 pin D connector
RS232 Cable
Tip to Pin 2
Sleeve (ground) to Pin 5