Source Mode - Time Electronics 7000 User Manual

Time Electronics
7000 RTD Calibrator
4.2

Source Mode

An RTD (Resistance Temperature Detector) probe resistance varies with temperature.
The resistance for a given temperature is different depending on the type of probe.
For process applications the type of probe and instrument is selected based on the required
temperature range and resolution. In the Source Mode the 7000 unit can simulate the most
commonly used probes to facilitate the calibration of RTD type input process instruments.
Establish the process instrument probe type input requirement
•
(e.g. Pt100 DIN alpha coeff. 0.003850)
Establish the required engineering units and temperature range (e.g. –100 to 150°C).
•
Check that the probe type and range are compatible, ie within the specification range
•
–200 to 250 ºC (refer to the specification section).
Establish the required input wiring connection type (3 or 4 wire)
•
• Set the 3/4 wire select button 'A' to the required connection.
o IN position for 3-wire
o OUT position for 4-wire
• Connect the calibrator to the process instrument.
See the wiring connections on previous page.
Turn on the calibrator via the side switch.
•
• Select the engineering units by repeatedly pressing until the required
units are displayed.
Select the type of RTD by repeatedly pressing until the desired
•
RTD is displayed (e.g. Pt 100 DIN a3.850).
Select measure mode by releasing selector button
•
'B' to the IN position.
• Determine the current Zero and Span settings by repeatedly pressing
The lower part of the display will show the 0, 25, 50 ,75 and 100% calibration points and
their corresponding temperature values.
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User Manual