Setting period multiple of IMU has no effect

[ardaboluk]

Hi there,
I'm trying to set the rate at which IMU topic is published. I only need IMU, thus I close other streams. Specifically I run these commands:

rosparam set /inertial_sense_node/stream_DID_INS_1 false
rosparam set /inertial_sense_node/stream_DID_INS_2 false
rosparam set /inertial_sense_node/stream_DID_INS_3 false
rosparam set /inertial_sense_node/stream_GPS1 false
rosparam set /inertial_sense_node/stream_GPS2 false
rosparam set /inertial_sense_node/stream_GPS3 false
rosparam set /inertial_sense_node/stream_IMU true

Then I set period multiple of IMU to 100 so that I get IMU data at a rate of 10 fps:
rosparam set /inertial_sense_node/imu_period_multiple 100

Then I start inertial_sense_node with the following command:
rosrun inertial_sense_ros inertial_sense_node

However, when I echo topics in a separate terminal using the following command, I see that the data is coming at a much fater rate than I expect.
rostopic echo /imu

Is this expected behavior ?