al-yeti Posted November 4 Posted November 4 15 minutes ago, james.wilson said: I suppose I'd test it by running it on a lead to another location not fixed to the wall This is why we need you! Quote
james.wilson Posted November 5 Posted November 5 well at least you think so Al! Quote securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount.
Oisín Posted November 5 Author Posted November 5 Could anyone with a HKC SW10270 panel tell me what the typical AC voltage is between DC output to earth. I'm trying to rule out AC interference as I read that this can affect touch screens. I am getting 36 V AC when measuring between DC supply on the panel and the mains earth. Quote
james.wilson Posted November 5 Posted November 5 8 hours ago, Oisín said: Could anyone with a HKC SW10270 panel tell me what the typical AC voltage is between DC output to earth. I'm trying to rule out AC interference as I read that this can affect touch screens. I am getting 36 V AC when measuring between DC supply on the panel and the mains earth. 22.3 on mine 1 Quote securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount.
Oisín Posted November 5 Author Posted November 5 35 minutes ago, james.wilson said: 22.3 on mine Thank you. A bit lower than mine. I don't have any alarm cables running parallel to mains cables, so all the leakage is through the PSU. Might be a next step for me to try a new PSU if moving the keypad doesn't work. Quote
james.wilson Posted November 5 Posted November 5 or try removing the ac power (pull fuse) for a bit and see if it continues when on battery only. Also measure your induced ac with the mains off to see the difference between the psu on and off 1 Quote securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount.
Oisín Posted November 5 Author Posted November 5 47 minutes ago, james.wilson said: or try removing the ac power (pull fuse) for a bit and see if it continues when on battery only. Also measure your induced ac with the mains off to see the difference between the psu on and off Thank you so much. Looks like the problem has been found. I removed the mains supply from the panel. Induced AC dropped from 36.6 V to 1.1 V. I watched the keypad for 10 minutes and there was no wakeups. Powered up the AC, and watched the keypad again, 3 wakeups within the first minute. So it's looking like a faulty PSU that is leaking too much AC. Quote
james.wilson Posted November 5 Posted November 5 Excellent 1 Quote securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount.
PeterJames Posted November 5 Posted November 5 1 hour ago, Oisín said: Thank you so much. Looks like the problem has been found. I removed the mains supply from the panel. Induced AC dropped from 36.6 V to 1.1 V. I watched the keypad for 10 minutes and there was no wakeups. Powered up the AC, and watched the keypad again, 3 wakeups within the first minute. So it's looking like a faulty PSU that is leaking too much AC. You could try an ACT1313 https://www.actmeters.co.uk/alarm-troubleshooting/1313-12v-spike-suppressor 1 Quote
al-yeti Posted November 5 Posted November 5 1 hour ago, Oisín said: Thank you so much. Looks like the problem has been found. I removed the mains supply from the panel. Induced AC dropped from 36.6 V to 1.1 V. I watched the keypad for 10 minutes and there was no wakeups. Powered up the AC, and watched the keypad again, 3 wakeups within the first minute. So it's looking like a faulty PSU that is leaking too much AC. Good job 1 Quote
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