Measurement Specialties 9116 user manual Zero and Gain Calibration Troubleshooting

Pressure Systems, Inc. Model 9116 User’s Manual

If the ping test of the host computer’s IP passed, while the ping of the Model 9116 module failed, check the following possible sources for error:

●Ensure the Model 9116 module’s IP has been assigned (as explained in Section 6.1.2.1) and that the correct IP was used for the ping test.

●Ensure the IP address of the host computer and the Model 9116 module are not duplicated on the network.

●Ensure the link LEDs are active on the scanner and the Ethernet hub or switch to which it is attached. Also ensure the link LEDs are active on the host computer’s Ethernet adapter and the hub or switch to which it is attached.

●Ensure the Ethernet adapter card installed in the host is properly configured without conflict. In Windows®95 this can be verified by entering the CONTROL PANEL under SETTINGS. Under CONTROL PANEL, select the SYSTEM icon. When the DEVICE MANAGER tab is selected, a list of all installed hardware devices will be displayed. Any possible hardware conflicts will be marked in this list with a yellow warning symbol next to the device in question.

●Ensure the Ethernet adapter is configured for 10 Mbit/Sec. Many adapters are capable of higher speeds that are not compatible with the Model 9116 modules.

6.2Zero and Gain Calibration Troubleshooting

Incorrect pneumatic setup or incorrect command usage when executing a module’s Re-zero or Span calibration command (see ‘Z’, ‘h’, and ‘C’ commands in Chapter 3) can result in unexpected module operation. A common source of errors during these operations is incorrect control of the module’s internal calibration valve and pneumatic inputs.

Pressure connections are described in Chapter 2 while details of calibration procedures are described throughout Chapter 4. Some common errors and problems are listed below. These common problems apply primarily to Model 9116 with its internal transducers and calibration manifold.

●The module’s supply air input is either not attached or does not provide enough pressure (less than 65 psig) to shift the calibration valve. This results in the calibration valve remaining in its current position even though module commands have requested movement of the valve.

●The module’s calibration valve is not placed in the correct position before executing the Span calibration command (Calculate & Set Gain). This command will not automatically shift the valve to the CAL position before taking data (as the Re-zero calibration command does). The user must manually control the calibration valve position using the Set Operating Options (‘w’) command if the CAL and CAL REF inputs are to be used.

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