7.1.2 Automatic Transmission of Measurements
The 1502A can beprogrammed to automatically send measurements to a re-
mote printer or terminal. The transmission interval is set using the “SA PEr”
sample period parameter.This is set in the Comm menu after the baud rate pa-
rameter.The display will briefly indicate “SA PEr” and then display the cur-
rent sampleperiod. The sample period is specified in hours, minutes, and
seconds. Setting the sampleperiod to 0 d isablesautomatic transmission of mea-
surements. Use the Land Rbuttonsto move between digits. The selected
digitwill flash. Use the Uand Dbuttons to increase or decrease the digit.
When the sample period isset as desired press Enter.
The sample period can also be set using the “SA” communications command.
The period can be specifiedin seconds, in minutes and seconds, or in hours,
minutes,and seconds. For example, SA=15<EOS> causes the 1502A to trans-
mitmeasurements at 15-second intervals.SA=10:00<EOS> causes the 1502A
to transmita measurement every ten minutes. SA=2:00:00<EOS> causes the
1502A to transmita measurement every two hours. (<EOS> represents the ter-
mination character which is either a linefeed or carriage return).
7.1.3 Time Stamp and System Clock
The 1502A has a built-in system clock that countshours, minutes, and seconds
while the poweris on. The clock can be used to time stamp measurement data
read from thecommunications interfaces. When the power is switched on the
clock isset to 00:00:00. You can set the clock to show the actual time-of-day.
This can be done withinthe Comm menu. Press theMenu button ( “SEt?”ap-
pears) and then theComm menu button. The display will briefly show “CLOC”
then the currentclock time in hours, minutes, and seconds. The time is repre-
sented in24-hour format with 00 hours meaning 12:00 a.m. and 23 hours
meaning 11:00 p.m.Use the Land Rbuttons to move between digits. The
selected digitwill flash. Use the Uand Dbuttons to chan ge the digit. Once
the digits are correct, press Enter to accept the new time. If you decide not to
change the time press the Exit button instead.
The clock can also be set using the “CL” communicationscommand:
CL=hh:mm:ss <EOS>.
The time stamp allowsyou to record th etime-o f-day with measurements that
are printed or transmitted to a computer.The g iventime is the value of the sys-
tem clock at the time of transmission. An example of time-stamped readings is
shown below.
t: 31.787 F 14:04:40
t: 31.788 F 14:04:50
t: 31.792 F 14:05:00
t: 31.793 F 14:05:10
The time stamp controlis also accessed in the Comm menu. Press the Menu
button (“SEt?” appears) and then the Commmenu button.Press Exit to skip
1502A Thermometer Readout
User’s Guide
24