diff --git a/src/io/piconnection.cpp b/src/io/piconnection.cpp
index 93021d5e..ec00565b 100755
--- a/src/io/piconnection.cpp
+++ b/src/io/piconnection.cpp
@@ -324,6 +324,7 @@ PIIODevice * PIConnection::addDevice(const PIString & full_path, PIIODevice::Dev
 		__device_pool__->lock();
 		if (diags_.value(dev, 0) == 0) {
 			PIDiagnostics * d = new PIDiagnostics(false);
+			d->setInterval(10.);
 			diags_[dev] = d;
 			CONNECTU(d, qualityChanged, this, diagQualityChanged);
 		}
@@ -449,6 +450,7 @@ PIPacketExtractor * PIConnection::addFilter(const PIString & name_, const PIStri
 		__device_pool__->lock();
 		if (diags_.value(e->extractor, 0) == 0) {
 			PIDiagnostics * d = new PIDiagnostics(false);
+			d->setInterval(10.);
 			diags_[e->extractor] = d;
 			CONNECTU(d, qualityChanged, this, diagQualityChanged);
 		}