Siemens SITRANS FUH1010PVX, Operating Instructions Manual, Page: 166 / 226

4-10
1010BXFM-3
Section 4
4.6.1 RTD CALIBRATION BY DATA ENTRY
The [RTD Calibrate] menu allows you to adjust the intrinsic Resistive Temperature Device
(RTD) reading to match an external reference thermometer by directly entering its reading.
Only perform this procedure while the RTD under test is installed and currently measuring a
known temperature.
To enter the current RTD temperature:
Press to move the highlight to [RTD].
To access the [RTD] option list press .
Move the highlight to [User Cal] or [Factory Cal] then press . This triggers the pop-
up window:
ENT
To enable numeric entry press , then enter in the reading of the reference thermom-
eter (e.g., 72.0).
Calib @ deg F
=72.0
Calib @ deg F
=32.0
4.6 THE RTD CALIBRATE MENU (optional)
The RTD Calibrate Menu appears on 1010BX-3 models only. Use this menu to calibrate the
991T or 1011TN RTD Temperature Sensors to an external standard. It is important to note
that Controlotron RTD temperature sensors are factory-calibrated for high accuracy. We rec-
ommend that before deciding to perform the calibration, check the current RTD reading in
[Diagnostics/Liquid Data]. You may find that you do not even need to calibrate the sensor. In
any case, make sure that the temperature reading stabilizes before proceeding further. The
RTD Calibrate menu allows you to perform an external calibration, which can be accomplished
either by data entry of the current RTD temperature or by a 32
0
F (0
0
C) Ice-Bath procedure.
You can switch between the intrinsic and external calibration modes at any time.
NOTE: If you perform an external temperature calibration, you should mark and record
the location of each connector and sensor-cable. Once you have re-calibrated
the temperature sensors, changing the sensor/connector orientation estab-
lished during the procedure may void the calibration.
To access the RTD Calibrate menu press
RTD Calibrate RTD 1 Factory
User Cal
Ö
Ö Ú
RTD CALIBRATE MENU STRUCTURE (Single Channel 1010)
Press to register setting. This adjusts the meter’s DAC (digital-to-analog con-
verter) so that a 1 kHz output corresponds with 1 kHz on the frequency counter.
Re-check the frequency counter to make sure that it is now reading 1 kHz.
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