CY8CKIT-025 PSoC® Precision Analog Temperature Sensor Expansion Board Kit Guide, Doc. # 001-65791 Rev. *J
22
Kit Operation
Figure 3-6. Thermistor
3.3.3
RTD
Platinum RTD PTS080501B100RP100, which is a class B PT-100 RTD, is used on the board. See
the RTD datasheet in the following location for more details:
<Install_Directory>\PSoC Precision Analog EBK\<version>\Documentation\DataSheet
.
You can connect any external four-wire RTD. Follow these instructions to use the internal and
external RTDs.
■
External RTD: Connect the external RTD to terminal blocks J8 and J9. The silk helps in the con-
nection. Remove jumper J6.
■
Internal (onboard) RTD: Place jumper J6. On jumpers J8 and J9, short 1–2.
shows the
connections for an internal RTD.
Figure 3-7. RTD
3.3.4
Diode
Terminal block J4 provides the option to connect up to two diode connected transistors. The diodes
are connected anti-parallel (see
) to each other so that two temperatures are
measured with just four pins – two pins to pass current and two pins to measure V
BE
.
J4 (1-4) is used to connect transistor 1. Connect the collector, base, and emitter to screws J4 1, 2,
and 3, respectively. Use a small wire to short J4, 3–4. This is to support four-wire measurement so
