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RM3 SERIES BACKREFLECTION METER
USER’S MANUAL
On
The meter responds to single character commands sent on the serial interface. The characters must be sent individually, without a message terminating sequence such as <CR> (carriage return) or <LF> (line feed). The meter acknowledges each character that is sent with a character or a measurement reading.
The command G initiates the transmission of a measurement. The meter returns the most recent measurement. The transmission also includes the wavelength at which the measurement was made and the characters <CR> <LF>.
The character commands that control the meter via the RS232 serial interface port are listed in Table 9. When a command is accepted, the letter Y is returned. When a command is not recognized or not accepted, the letter X is returned.
Table 9: Character Commands
Command | Action |
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B | Display backreflection |
|
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A | Display absolute power |
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R | Display relative power |
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S | Store BR0 1 |
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C | Clear BR01 |
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D | Store ID 2 |
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0 | Set relative power to zero3 |
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3 | Set wavelength to the laser connected to the first LED |
| on display (eg. Model RM3750, first laser=1310nm. See |
| Figure 3) |
|
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5 | Set wavelength to the laser connected to the second |
| LED on display (eg. Model RM3750, second |
| laser=1550nm. See Figure 3) |
|
|
1Valid in Backreflection mode only.
2Valid in Absolute Power and Relative Power modes only.
3Valid in Relative Power mode only.
10112341 Rev 002 | Page 38 of 39 |