Sper Scientific 800043 Ultimate Thermometer - Manual (Page 6)

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G. LCD BACK LIGHT - Press the BACK LIGHT >2S5 button (5) for at
least 2 seconds. The LCD will light for approximately 10 seconds, then
turn off.
H. AUTO POWER OFF - If no buttons are pushed for approximately
10 minutes, the meter will automatically turn off. To disable this feature,
select the Data Record function (page 5) by pressing the REC button
(6). "REC" will be displayed.
I. BATTERY REPLACEMENT - Accurate thermometer
readings may be taken for several hours after the low battery
indicator is displayed. Open the battery cover, install a fresh
9V battery and replace the cover.
J. RS232 PC SERIAL INTERFACE - This unit features an RS232
Output Socket (9) on the side of the unit. Gently lift the hinged cover
from the bottom. The output is a 16 digit data stream which can be
utilized by user's specific application. An RS232 lead with the following
connection is required to link the instrument with the PC serial input:
RS232 FORMAT: 9600, N, 8, 1
The 16 digit data stream will be displayed as follows:
D15D14D13D12D11D10D9D8D7D6D5D4D3D2D1D0
D0 End Word
D1 & D8
Display reading, DI " LSD, D8 MSD. For example: If the
display reading is 1234, then D8 to D I is: 00001234
D9
Decimal Point(DP), position from right to the left
0 = No DP, 1 = 1 DP, 2 = 2 DP, 3 = 3 DP
D10 0 = Positive, 1 = Negative
D11 & D12 Anunuciator for Display: 01=°C, 02=°F
D13 1
D14 4
D15 Start Word
Each digit indicates the following status:
Meter (3.5 mm jack plug) PC (9W "D" Connector)
Center Pin Pin 4 Pin 2 2.2K
Ground/Shield Pin 2 Pin 5 resister