Siemens SITRANS FUS1010 NEMA-4X/ IP 65 Benutzerhandbuch
3-19
1010NFM-3J
Section 3
3.2.4 CLAMP-ON RESISTIVE TEMPERATURE DEVICE (RTD) INSTALLATION NOTES
The Clamp-On RTD sensor, with which your 1010N is supplied, is extremely sensitive and precise. Its
contribution to the performance of your meter can be as important as that of the liquid flow sensors.
Please consult the installation drawings for details on physical installation and wiring of the RTD. In
order to produce the best possible tracking of the true liquid temperature, try to make your installation
conform to the notes on the installation drawing and these following tips:
contribution to the performance of your meter can be as important as that of the liquid flow sensors.
Please consult the installation drawings for details on physical installation and wiring of the RTD. In
order to produce the best possible tracking of the true liquid temperature, try to make your installation
conform to the notes on the installation drawing and these following tips:
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Prepare the pipe surface by removing paint to expose bare metal and by smoothing out any re-
maining rough spots.
maining rough spots.
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Use the thermal couplant compound (CC#117) between the face of the RTD element and the pipe
surface to improve the conductivity of the metal-to-metal contact.
surface to improve the conductivity of the metal-to-metal contact.
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Keep the RTD out of direct sunlight or other non-pipe sources of heat or cold that may affect their
temperature sensing. The foam insulator supplied helps in this regard, but consider using addi-
tional pipe insulation for all installations exposed to extreme ambient conditions. Consider mount-
ing the RTD under the pipe in order to keep it out of direct sunlight.
temperature sensing. The foam insulator supplied helps in this regard, but consider using addi-
tional pipe insulation for all installations exposed to extreme ambient conditions. Consider mount-
ing the RTD under the pipe in order to keep it out of direct sunlight.
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In installations where RTD elements are exposed to harsh conditions such as condensation, salt
spray, etc., use CC#110 couplant compound to coat the connection between the cable and the
RTD sensor. Consult Installation Drawing 991TN-7 for details.
spray, etc., use CC#110 couplant compound to coat the connection between the cable and the
RTD sensor. Consult Installation Drawing 991TN-7 for details.
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Be sure to install the supply RTD Sensors (see diagram on previous page) in the appropriate
locations.
locations.
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Be sure to correctly indicate where the flow is being measured in the “Location” item of the 1010
menu; either supply or return.
menu; either supply or return.
3.2.5 PARALLELING RTD INPUTS FOR DUAL-CHANNEL ENERGY MEASUREMENT
Should you wish to measure liquid flow in the same pipe twice (perhaps at the supply and return
location of the line) but not redundantly have to measure the temperature, the following information
may prove helpful:
location of the line) but not redundantly have to measure the temperature, the following information
may prove helpful:
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Connect terminal #2 of terminal blocks TB1 and TB2 together and terminal #3 of TB1 and TB3. You
can use any available hookup wire to do this. By doing this, you are not shorting terminals 2 and 3;
just interconnecting 2/2 and 3/3 of each terminal block.
can use any available hookup wire to do this. By doing this, you are not shorting terminals 2 and 3;
just interconnecting 2/2 and 3/3 of each terminal block.
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Connect terminal #2 terminal blocks of TB2 and TB4 as well as Terminal #3 of TB2 and TB4. This
hookup will result in the same temperature being reported for Tr and Ts for channels 1 and 2 of the
meter. It probably is a judicious idea to check the temperature to ensure that they do indeed match.
Of course, Td will be similarly identical. These temperatures can be checked in Diagnostics/En-
ergy Data.
hookup will result in the same temperature being reported for Tr and Ts for channels 1 and 2 of the
meter. It probably is a judicious idea to check the temperature to ensure that they do indeed match.
Of course, Td will be similarly identical. These temperatures can be checked in Diagnostics/En-
ergy Data.
z
Be sure to accurately indicate where the flow is being measured in the “Location” item of the 1010
menu; either supply or return.
menu; either supply or return.