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6. How to Use EM7162 without Connecting to a Computer
When using the EM7162 without connecting to a computer, connect the 5-VDC power supply between
the power supply input terminal and the ground terminal (see Figure 1).
- The PWM output terminal outputs the PWM output signal from CDM7162 with a cycle of 1 kHz.
The PWM duty ratio of 0 ~ 100% corresponds to the CO
- The voltage output terminal outputs the concentration signal obtained by converting the PWM output
into voltage. The output voltage of 0 ~ 5 V corresponds to the CO
- A CMOS signal corresponding to the CO
With the default settings of the CDM7162, the CMOS output is High when the CO
higher than 1,000 ppm, and the output is Low when the CO
7. Notes
7-1) Connection between EM7162 and a computer
- Be sure to mount the CDM7162 onto EM7162 before connecting EM7162 to a computer.
- Do not remove CDM7162 from EM7162 while EM7162 is connected to a computer.
- Do not remove the cable connecting EM7162 and a computer while CO
measured by the measurement data management software.
7-2) Error messages of the measurement data management software
If an error message is displayed, check the following items:
(Note that the details of the error message may vary depending on the location and cause of error)
(1) Error message: [It failed on COM Port Open.]
- Check that the COM port setting is correct on the data management software.
"FT232R USB UART" should be displayed in Device Manager.
- Confirm that CDM7162 is properly mounted on EM7162.
(2) Error message: [It failed when Lamp Interval couldn't get in I2C Communication.]
- The serial communication method specified on the evaluation board does not match the
communication method selected on the data management software screen.
concentration is output from the alarm output terminal.
2
[Failed on Lamp Interval Data!]
13
concentration of 0 ~ 5,000 ppm.
2
concentration of 0 ~ 5,000 ppm.
2
concentration is below 900 ppm.
2
concentration is being
2
concentration is
2
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