TSI Instruments SIZER 3321, User Manual

Page: 71 / 101

Using Serial Data Commands C-7
SCE
—Set Calibration Environment
SCE lets you set the temperature and pressure.
SCE p,t
where:
p = absolute pressure at calibration (in millibars).
t = absolute temperature at calibration (in degrees K).
SCE with no parameters echoes the current values of p and t, which are
saved in EEPROM and loaded into RAM when the instrument is powered
up.
Example:
To set the absolute pressure and temperature to 970.4 millibar and
393.3 K:
SCE970.4,393.3
SCR
—Set Calibration Resolution
SCR lets you set the number of side scatter channels that will report.
SCR x
where:
x = 1, 2, 4, 8, 16, 32, or 64.
Note : 64 is the default on power up.
Example:
To set the number of side scatter channels that will report to 16:
SCR16
SD
—Set Digital Output
SD sets the logic level of the three digital I/O connector output pins 11, 12,
and 13. (See Figure 3-3, Figure 3-5, and Table 3-2 for the location and
pinout of I/O Port on back panel. (Referenced to pins 4, 5 Digital GND.)
SD h
where:
h = 0 to 7 and is a hex value representing three binary bits. If a bit is 0,
the corresponding output is set to 0 volts. If a bit is a 1, the output
is set to 5 volts.
Table C-2 shows the equivalent voltage level (in volts) of pins 11, 12, and
13 for all possible settings.