# Sharky 775 heat meter questions **URL:** \ **Category:** Hardware\ **Tags:** heat-pump\ **Created:** [16 October 2022 21:12 UTC](https://community.openenergymonitor.org/t/sharky-775-heat-meter-questions/21591 "2022-10-16T21:12:39Z")\ **Posts on this page:** 1\ **Showing post:** 69
**Author:** ![glyn.hudson](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/glyn.hudson/32/35003_2.png) [@glyn.hudson](https://community.openenergymonitor.org/u/glyn.hudson)\ **Post date:** [21 February 2023 10:58 UTC](https://community.openenergymonitor.org/t/sharky-775-heat-meter-questions/21591/69 "2023-02-21T10:58:10Z")
> [@Zarch](#): > > It looks like @glyn.hudson also has his heat meter BEFORE both expansion vessel and the auto-air valve. > > Whereas I have mine placed after both of those. > > Is heat meter before expansion/auto valve a better way of doing it? > So you’re not dragging air out along the way as @marko suggests? Possibly, but since my meter is a Sontex even if there were air pockets in there the reading would be effected. Have you tried increasing your system pressure up to 2bar? This fixed the same issue for: > [@Kamstrup Multical 403 Stops Working During Hot Water Cycle (Interference?)](https://community.openenergymonitor.org/t/kamstrup-multical-403-stops-working-during-hot-water-cycle-interference/22896): > > I’ve recently switched to an ASHP from a boiler and, as part of the installation, OpenEnergyMonitor level 3 heat pump monitoring has been fitted. I’ve consistently had problems with the monitoring equipment, but I’ve managed to work through most of them (details at the end of this post). The only remaining issue seems to be that the heat meter, a Kamstrup Multical 403, consistently stops functioning properly during a hot water cycle. The only thing I can think of is that there is some kind of … --- _[View the full topic](https://community.openenergymonitor.org/t/sharky-775-heat-meter-questions/21591)._