diff --git a/sd-card/html/edit_config_param.html b/sd-card/html/edit_config_param.html
index d5ef7007..5cc65890 100644
--- a/sd-card/html/edit_config_param.html
+++ b/sd-card/html/edit_config_param.html
@@ -495,7 +495,7 @@ textarea {
 				<label for=PostProcessing_AnalogDigitalTransitionStart_enabled><class id="PostProcessing_AnalogDigitalTransitionStart_text" style="color:black;">analogDigitalTransitionStart</class></label>
 			</td>
 			<td>
-				<input type="number" id="PostProcessing_AnalogDigitalTransitionStart_value1" step="0.1" value="9.2">
+				<input type="number" id="PostProcessing_AnalogDigitalTransitionStart_value1" step="0.1" min="6.0" max="9.9" value="9.2">
 			</td>
 			<td style="font-size: 80%;">
 				If you have false Values, but the recognition is correct. Look for the start of changing of the first digit and note the analog pointer value behind. Set it here.