4-85
1010GCNFM-3C
Section 4
3. Press <ENT>. This triggers a 2.00 Volts pop-up window. The multimeter should now be reading 2.00
Volts.
4. If the multimeter reading does not match, use the numeric keys to type in the multimeter reading.
5. Press <ENT> to register setting. This adjusts the meter’s DAC (digital-to-analog converter) so that a
2.00 Volts output corresponds with 2.00 Volts on the multimeter.
6. Re-check the multimeter to make sure that it is now reading 2.00 Volts.
Pgen Output Trim (Pgen 1 & Pgen 2)
Not available in Custody Transfer flowmeters.
(Note: Can be trimmed to within 1.25 Hz of nominal.)
To calibrate a pulse rate output (Pgen1 or Pgen2):
1. Connect a frequency counter to the supply and return terminals of the pulse rate output under test.
2. Move the highlight to the port to be tested, press the <Right Arrow>, then press the <Down Arrow>
to move the cursor to [Trim @ 1kHz].
3. Press <ENT>. This triggers a 1 kHz pop-up window. The frequency counter should now be reading 1
kHz.
4. If the frequency counter reading does not match, use the numeric keys to type in the frequency
counter reading.
5. Press <ENT> to register setting. This adjusts the meter’s DAC (digital-to-analog converter) so that a
1 kHz output corresponds with 1 kHz on the frequency counter.
6. Re-check the frequency counter to make sure that it is now reading 1 kHz.
4.12.6 THE RTD CALIBRATE MENU (optional)
The RTD Calibrate Menu appears on all Sitrans 1010N models. Use this menu to calibrate the 991T or
1011TN RTD Temperature Sensors to an external standard. It is important to note that Siemens RTD
temperature sensors are factory-calibrated for high accuracy. We recommend that before deciding to
perform the calibration, check the current RTD reading in [Diagnostics/Gas 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 tempera-
ture sensors, changing the sensor/connector orientation established during the proce-
dure may void the calibration.
To access the RTD Calibrate menu press the <Right Arrow>.
RTD Calibrate RTD 1 Factory
User Cal
RTD 2 Factory
User Cal
Ö
Ö
Ö
Ú
Ú
RTD CALIBRATION MENU STRUCTURE (Single Channel)
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