Communications Ports; Led Indicators; Comm Status; Cpi Port - Campbell TEMP 120 Product Manual

7.1.1 Communications ports

One micro-B USB port, labelled USB, is for communicating with a computer through SURVEYOR
or Device Configuration Utility software.
CPI is a proprietary protocol that supports GRANITE Measurement Modules. Two RJ45 ports
labelled CPI enable communications with a Campbell Scientific data logger and other GRANITE
Measurement Modules.

7.1.2 LED indicators

7.1.2.1 COMM status

When the TEMP 120 has successfully been configured by a data logger, the COMM Status LED
will flash green. For scan rates 500 ms or slower, it will flash at the scan rate. For faster scan rates,
the LED will flash green every few scans. See Table 12-2 (p. 25).

7.1.2.2 CPI port

When the TEMP 120 has successfully been configured by a data logger, the green LED on the CPI
port will flash. For scan rates 500 ms or slower, it will flash at the scan rate. For faster scan rates,
the green LED will flash every few scans. A flashing orange LED indicates bus activity. A solid
orange LED indicates a bus error. See Table 12-3 (p. 25).

8. Specifications

All Standard Duty (SD) TEMP 120 units meet electrical specifications in a temperature range of
-40 to 70 °C, non-condensing environment. Extended Duty (XD) units are tested over an
extended temperature range of -55 to 85 °C. Recommended calibration interval of XD units is
every three years.
8.1 Thermocouple measurement
specifications
Thermocouple measurements use a 24-bit Analogue-to-Digital (A-to-D) converter. One channel
at a time is measured in numeric succession.
TEMP 120 10