Sampling Run/Stop; Sample N; Sample Timing; Figure 5 Sample Timing - Fluke Hart Scientific 1575 Super-Thermometer User Manual

1575/1590 Thermometer Readout
User's Guide
7.2.1
7.2.2
7.2.3
40

Sampling Run/Stop

The RUN/STOP soft-key is used to start and stop sampling. The soft-key label
will indicate the present status by graying RUN or STOP.
The run/stop sampling function overrides any of the or disk sampling functions
(see Section 7.6.3 and 7.6.4). As long as sampling is inhibited with the STOP
soft-key, no new measurements will be transmitted via the communications in-
terfaces or written to disk.

Sample N

The SAMPLE N soft-key programs the Super-Thermometer to make a certain
number of measurements then stop. You will be prompted to enter the desired
number of measurements. Press Enter after setting the number.
The 1575/1590 will begin making measurements and then stop after the speci-
fied number of measurements has been obtained. The SAMPLE N soft-key will
indicate the number of samples remaining. The RUN/STOP soft-key will indi-
cate (by graying) RUN while the samples are being taken and STOP when fin-
ished. Channels may be switching manually or automatically without affecting
the total number of measurements made.

Sample Timing

The SAMPLE TIMING soft-key allows the user to set any of the sample timing
parameters which include conversion time, sample interval, and integration pe-
riod. (Access to the sample timing parameters can be locked out as explained in
Section 7.6.5.4.) Figure 5 below shows how these parameters affect the mea-
surement process.
new measurement

Figure 5 Sample Timing

The conversion time is the time in seconds required for the thermometer to
make a single unprocessed (raw) measurement. Normally this is set to two sec-
onds. It can be increased if more settling time is needed after the current is re-
versed (see Section ). In some cases a PRT may have excessive reactance,
leakage, or dielectric absorption and a longer than normal delay may be neces-
conversion time
sample interval
new measurement
samples
averaged
time
integration
period