Measuring Temperature (Atmi) - Ametek Crystal HPC51 Operation Manual

MEASURING TEMPERATURE (ATMi)

Your HPC50 has the ability to measure temperature very accurately using the ATMi "true ohm" technology. True ohm resistance measurement eliminates tem-
perature reading errors by compensating for thermoelectric effects associated with the wires and connections between the ATMi and the RTD.
The HPC50 will also indicate electrical resistance (Ω) to help in troubleshooting your resistance based sensing element.
For details on the ATMi external module, see the
ATMi External Temperature Modules
!
CAUTION: ATMi modules must only be used with intrinsically safe probes provided by Ametek.
To Measure Temperature
X
1 Connect an ATMi with RTD probe to the HPC50 Chassis in either ATMi port.
Connect an ATMi module to either port 1 or 2
2 Select ATMi1 or ATMi2 .
For more information on working in the HPC50 display, see
3
Select the appropriate unit from the list.
4
The HPC50 will display the measured temperature.
Note: + OL
will be displayed if a probe is not connected to the ATMi, or if the probe resistance is greater than 400 Ohms and/or the calculated temperature is
outside the range defined for the probe. Temperature range depends on the probe type.
ATMi manual.
Navigating Through a Typical Setup.
16
Operation
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HPC50 Series Operation Manual