[Nut-upsdev] [HCL] Tripp-Lite Omnismart500 supported by tripplite_usb

[Charles Lepple]

On Feb 14, 2012, at 12:56 PM, Matt Schulte wrote:

> Why does it say "battery.test.status: Battery bad - replace?"

Not to be too literal, but it comes from this block of code in tripplite_usb.c, which may or may not be accurate for your specific model.

        if(tl_model == TRIPP_LITE_SMARTPRO || tl_model == TRIPP_LITE_OMNIVS_2001 || tl_model == TRIPP_LITE_SMART_0004) {
                switch(s_value[2]) {
                        case '0':
                                dstate_setinfo("battery.test.status", "Battery OK");
                                break;
                        case '1':
                                dstate_setinfo("battery.test.status", "Battery bad - replace");
                                break;
                        case '2':
                                status_set("CAL");
                                break;
                        case '3':
                                status_set("OVER");
                                dstate_setinfo("battery.test.status", "Overcurrent?");
                                break;
                        case '4':
                                /* The following message is confusing, and may not be accurate: */
                                /* dstate_setinfo("battery.test.status", "Battery state unknown"); */
                                break;

Usually, after you first plug in the UPS, the status bit says "4", which apparently means that the battery charger hasn't seen much of the slope of the charge or discharge curve yet. (If the battery is just being topped off, you can't really tell its capacity by the instantaneous current or voltage.)

After a deep discharge cycle, the charging circuit has seen both the rate of discharge as well as the rate of charge, and it can guess as to whether the battery is close to the end of its life. Lead-acid batteries are usually good for 3-5 years.

-- 
Charles Lepple
clepple at gmail