To check a Gentec meter for responsivity, make an insignificant alteration to the wavelength field (e.g. change 527 to 528):

  • if the RBV for the wavelength changes, then the Gentec is live
  • if the RBV for the wavelength DOESN'T change:
    • begin first by rebooting the IOC and then test responsivity again after half a minute or more
    • if still unsuccessful, power-cycle the energy meter and reboot the IOC again
    • if still unsuccessful, begin checking for network connections, power cables, connections between the meter's head and sensor, etc.

Note: If the Gentec is responding, it may be prudent to re-initialize all the requisite settings for the Gentec meters to be internally triggered/etc. properly. This is done within meclas using the EMeters.gentec_refresh() function.

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  1. Cunningham, Eric Flint

    Other Gentec notes about external triggering (from July 2021):

    S-LINK 
    Positive External trigger 3 to 24 V @ 13 mA, optically isolated.
    External trigger pulse width 2 us minimum, no maximum time.

    The Input connector is a Female BNC. The External trigger is TTL compatible. The monitor detects a trigger on the rising side of the external trigger signal. To measure accurately, the trigger must be just before the laser pulse, or just after. For Example A QE12SP-S-MT has a 20uS rise time The External trigger must be 4 us before or 19us after the laser pulse.
    https://downloads.gentec-eo.com/prod/3e70e409/101481-Manuel-S-Link-2.9.pdf

    (QE95LP: Typical rise time: 2 ms)
    https://www.gentec-eo.com/products/qe95lp-s-mb-d0


    To Set the External Trigger for Channel 1 or 2.
    x= 0 = disable, x = 1= enable
    Default value is 0.
    Example : To disable the External trigger for Channel 1 enter *ET10 .
    Example : To enable the External trigger for Channel 2 enter *ET21 .
    You must stop the continuous acquisition (*CS1, *CS2), before sending this
    command.