7.5 Units
This mode is identified by “Units: C/Ω/F/K/R” that appears on the display.
This mode allowsyou to select the unit of measurement: C for degrees Celsius,
Ωfor resistancein ohms, F for degrees Fahrenheit, K for Kelvin, and R for
Rankine.The Up and Down buttons are used to select one of the displayed
units.The underline cursor indicates which of the units is selected. The ENT
button stores the selection. If the MODE button or CLR button is pressed with-
out pressing ENT the unitremains unchanged. Once the unit is selected, subse-
quent measurements appear in that unit. The Min/Max and Delta(x) values
areautomatically converted when changing to C, K, F, or R units.
When measuring in units of ohms, makesure that the appropriate probe type
has been selected in the Cal Mode menu. For example,to measure a sensor be-
tween 0 and 400 ohms, setthe units to ohms and select the probe type "CVD".
Tomeasure a sensor between 400 and 500K ohms, set the units to ohms and se-
lectthe probe type "THERM".
7.6 Rate
This modeis identified by “Rate: 00000" that appears on the display.
This mode allowsyou to set the samples that are transmitted through the serial
port. The samplefor a 2-wire and a 4-wire probe is approximately one second
and for a 3-wire probe is approximatelytwo seconds. For example, if the rate is
set to 2, everyother sample is sent through the serial interface. Note: If the
probe wire isset to 3, the time between samples is twice as long. A value of 0
disables transmission. The Up and Downbuttons are used to increase or de-
crease thevalue for the underlined digit. The ENT button moves to the next
digit. If the ENT button ispushed when the last digit is underlined, the setting
is stored.If the MODEbutton o r CLRbutton is p ressed, the valueremain s un-
changed. Once the valueis set, measurements are transmitted through the serial
port atthe given interval.
7.7 Resolution
This mode isidentified by “Resol: XXX.XXX” that appears on the display.
This mode allowsy ou to set the resolution of measurements to one, two, or
three digitsafter the decimal point. The Up and Down buttonsareusedtoin
-
crease or decrease the resolution setting. The ENT button stores the setting. If
the MODE button or CLR button is pressed, the setting remains unchanged.
Once the resolution is set, measurements are displayed and transmitted from
the serialport at the given resolution if possible. The resolution may be reduced
if necessary for largevalues of temperature or resistance.
1521 Handheld Thermometer Readout
User’s Guide
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