diff --git a/alvra.py b/alvra.py
index 56c011e..ceb7a80 100755
--- a/alvra.py
+++ b/alvra.py
@@ -25,7 +25,7 @@ fn_channels = "./slickits/alvra/config/channel_list"
 channels = Channels(fn_channels)
 
 
-check_intensity = PVChecker("SARFE10-PBPG050:HAMP-INTENSITY-CAL", vmin=-100, vmax=300, wait_time=3)
+check_intensity = PVChecker("SARFE10-PBPG050:HAMP-INTENSITY-CAL", vmin=-100, vmax=300, wait_time=3, required_fraction=0.8)
 
 bsdaqJF = DIACounter(cfg.instrument, cfg.pgroup, default_channels=channels)