Sierra 241-VTP, 240-VTP instruction manual Analog Output Calibration

Series 24-HP Instruction Manual Chapter 4 Troubleshooting & Repair

•Pressure Cal Current = Calibration value for the electronics and pressure transducer combination. Consult Factory for value.

•RTD1. Press the RIGHT ARROW to access:

oRo = RTD resistance at 0°C (1000 ohms).

oA = RTD coefficient A (.0039083).

oB = RTD coefficient B (-5.775e-07).

oSlope = unique value for each set of electronics.

oInt = 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.

IM-24-HP 4-5