VorTek Pro-T, Instruction Manual

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Series M22/M23/M24 Instruction Manual Chapter 5 Troubleshooting & Repair
M-000-00010 5-7
Analog Output Calibration
To check the 4 – 20 mA circuit, connect a DVM in series with the
output loop. Select zero or full scale (from the second level of the
hidden diagnostics) and then actuate the enter key twice. This
action will cause the meter to output its 4 mA or 20 mA condition.
If the DVM indicates a current greater than ± 0.006 mA from 4 or
20, adjust the setting up or down until the output is calibrated.
Note: these settings are not for adjusting the output zero and span
to match a flow range, that function is located in the Output Menu.
Display Contrast Adjustment
The flow meter display contrast is set at the factory but if the
display characters appear too dark or too light proceed as follows:
1) Hold down the “Exit” button on the front panel for 5 to 10
seconds. “Setting Contrast” will appear.
2) Push the “Up” arrow to darken the display or the “Down” arr ow
to lighten it.
3) Push the “Enter” button to save the contrast setting.