Automobile Parts - Air Flow Meter User Manual

Series 24-HP Instruction Manual Chapter 4 Troubleshooting & Repair
IM-24-HP 4-5
• Pressure Cal Current = Calibration value for the electronics
and pressure transducer combination. Consult Factory for
value.
• RTD1. Press the RIGHT ARROW to access:
o Ro = RTD resistance at 0°C (1000 ohms).
o A = RTD coefficient A (.0039083).
o B = RTD coefficient B (-5.775e-07).
o Slope = unique value for each set of electronics.
o Int = unique value for each set of electronics.
• RTD2 = Second RTD configuration, for special applications
only.
• Min. Delta H – Energy EMS meters only. Sets the deadband
for totalization to begin. Must be greater than this number (1
default) to initiate the totalizer.
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 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.