Panametrics PanaFlow MV80, Руководство пользователя, Страница: 145 / 184

PanaFlow™ MV80, MV82 & MV84 User’s Manual 133
Chapter 5. Troubleshooting and Repair
• RTD1 Press the
RIGHT
arrow to access:
• Ro = RTD resistance at 0°C (1000 ohms).
• A = RTD coefficient A (.0039083).
• B = RTD coefficient B (-5.775e-07).
• RTD1 Max Deg. F = 500
• RTD1 Min Deg. F = -330
• RTD2 = Second RTD configuration, for special applications only.
• Correction Pairs
• ft3/sec (1 through 10)
• %Dev. (1 through 10)
• Roughness = Factory use only.
• Force Recal? = Factory use only.
• Min. Delta H - Energy EM meters only. Sets the deadband for totalization to begin. Must be greater than this
number (1 default) to initiate the totalizer.
• Init Displ. (sec) = Enter a value in seconds to initialize the display every xxx seconds. Enter a value of 0 to disable
initializing the display.
5.2 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
column of the hidden diagnostics) and then press the
ENTER
key twice. This action will cause the meter to output its 4
mA or 20 mA signal. If the DVM indicates a current variation greater than ± 0.006 mA from the 4 mA or 20 mA signal,
adjust the setting up or down until the output is calibrated.
Note: These settings are not for adjusting the output zero and span values to match a flow range. That function is
located in the Output Menu.
5.3 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” arrow to lighten it.
3. Push the “Enter” button to save the contrast setting.