Lutron Electronics TM-947SD Operation Manual page 23

Meter
Center Pin........................Pin 4
(3.5 mm jack plug)
Ground/shield..................... Pin 2
The 16 digits data stream will be displayed in the
following format :
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Each digit indicates the following status :
D15 Start Word
D14 4
D13 When send the T1 display data = 1
When send the T2 display data = 2
When send the T3 display data = 3
When send the T4 display data = 4
D12, D11 Annunciator for Display
℃
D10 Polarity
0 = Positive 1 = Negative
D9 Decimal Point(DP), position from right to the
left
0 = No DP, 1= 1 DP, 2 = 2 DP, 3 = 3 DP
D8 to D1 Display reading, D1 = LSD, D8 = MSD
For example :
D0 End Word
= 01
℉
If the display reading is 1234, then D8 to
D1 is : 00001234
PC
(9W 'D" Connector)
Pin 5
= 02
21
2.2 K
resistor