Changes between Version 78 and Version 79 of gsc


Ignore:
Timestamp:
05/17/2021 05:28:00 PM (17 months ago)
Author:
Ron Eisworth
Comment:

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  • gsc

    v78 v79  
    13811381  * To verify the GSC current consumption, you can measure the voltage across a diode (+ probe on anode, - probe on cathode). The voltage across the diode with no power applied to the board should be approximately 300mV. If you see something in the 400mV range that means the GSC is not reset properly or there is some type of contamination causing excessive current draw. Contact support with your serial number for specifics on which diode ( support@gateworks.com ).
    13821382 * Note that bat rail voltage cannot be measured via Linux software as shown above until board power is turned off for one second or more (a second time when battery is replaced/GSC reset). When power is off, we monitor the bat voltage every 18 hours. When the board is fully powered on and booted into Linux, the bat reading cannot be continually updated and reports the last read voltage when the board was last powered off.
    1383  * The GSC can operate down to a battery voltage of 2.2V. If the battery goes below this erratic behavior can result and the battery should be either removed (operate without battery) or replaced.
     1383 * The GSC can operate down to a battery voltage of 2.2V. If the battery goes below this voltatge the GSC can get into a brownout loop. To avoid this the battery should be either removed (operate without battery) or replaced.
    13841384 * A fresh battery typically has a voltage ranging from 2.8 to 3.1V (also depends on temperature). The battery discharge rate is fairly flat but once it is discharged it can decay rapidly. Note that when the board is powered, the 3.3V power supply supplies power to the GSC and the battery will not be drained. This should be factored in when determining battery lifetime.
    13851385 * The BR1225 coin cell is rated at 50mA/hours. Battery lifetime can be calculated by taking the battery rating divided by the current drain. The GSC's typical drain depends on the version: