Internal Adjustments
The internal adjustments are factory set and should not be changed. However, if the need arises and suitable standards are available the following adjustments can be made. (see figure on page
Full Scale
The full scale potentiometer changes the display by changing the sensitivity of the instrument. Apply a calibrated +5 VDC signal to the Sig Hi and Sig Lo pins on the back of the power supply.The display of the instrument should read “100.0”, “10.00” or “1.000”depending upon the configuration.Adjust the full scale potentiometer (R11) if needed.
Analog Output
The analog output potentiometer changes the analog output voltage by changing the gain on the output buffer amplifier. Apply a calibrated pressure standard to the transducer and refer to equation (1). Adjust the potentiometer (R18) as needed.
Notes on internal adjustments:
*Both the full scale reading and the analog output voltage can change by only ± 10%.
**Zero adjustment can only be performed on the flowmeter itself. Consult your flowmeters manual for making these adjustments.
Display Configuration
The jumper position on the power supply circuit board determines the location of the decimal on the display.The jumper is factory set to match the configuration specified by the customer. Should the need arise to change the display configuration, this jumper can be easily moved (see figure on page 13).
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