HF-MS System Operating Instructions
the measuring device again, you have to press the data button once to turn on the sender. This does not
transfer a measured value. Press the data button again to transfer a measured value.
If you move the caliper without pressing the data button thereafter it can happen that the sender has already
switched itself off although the caliper is still on. Pressing the data button does not transfer any measured
value, but simply switches on the sender again. You won’t hear any confirmation beep from the receiver.
Press the data button again to send the measured value.
Note on Measuring Devices with the RS232C Interface
To increase the life of the battery in the sender, the sender usually turns on only for the duration of a
measured value transfer. However, for technical reasons the sender of RS232C interface measuring
devices only turns off after 30 minutes if no new measured value was transferred in the meantime. Press
the data button once to turn on the sender. This does not transfer a measured value. Press the data button
again to transfer a measured value.
Transfer Problems
If you encounter transfer problems first make sure that all devices are switched on. If this is the case,
choose a different location (see step 1) and test the radio transfer using a small distance. Press the data
button on the measuring device or sender to trigger the radio transfer.
If the receiver does not issue two tones and if the red LED is not lit, no carrier signal is detected. Make sure
that the battery was inserted correctly into the sender (see step 3) and that the connection between the
measuring device and the sender was established correctly.
If you continue to encounter transfer problems and if you have tried several locations (see step 1), then
make sure that no other sender works with this frequency. If the red LED on the receiver is lit although you
did not press the data button, a carrier signal from a different device was received. Other devices which are
not used for radio transfer might also interfere. Try to localize and remove these devices.
If the receiver issues two tones, the value was received correctly. If it does not appear in the PC software,
the connection between receiver and PC is faulty or the PC software has been configured incorrectly.
Operation with Several Measuring Devices
To operate several measuring devices in one system simultaneously, you have to store a measuring device
number in the sender. This number will be sent with every measured value transfer. The number
corresponds to the canal number as it is known from cable-connected interfaces. You can choose
measuring device numbers from 1 to 8 or from 1 to 99. To store the number:
From 1 to 8
Requirement: sender—firmware version 1.xx or 2.xx, receiver—firmware version 1.xx to 3.xx
Set the measuring device to a value so that the digit directly before the point reflects the desired number.
With Mahr Extramess 2000/2001 the digit directly after the comma must correspond to the desired number.
The other digits are not relevant. Fix the measuring device (if possible) so that the value does not change.
Remove the battery from the sender and briefly insert it into the holder the wrong way round. This will reset
the sender electronics, but not short-circuit the battery. Turn the battery the right way round and press the
data button on the measuring device or sender within 2 seconds. This will save the digit before (or after) the
point as measuring device number. As it is the case every time you insert a battery, a measured value will
not be transferred, but the version number of the sender firmware will be transferred as a measured value.
The computer will receive a string with preceding measuring device number, e.g. 02A+0001.010C
R
L
Ffor
measuring device 2 and version 1.01
From 1 to 99
Requirement: sender—firmware version 3.xx or 4.xx, receiver—firmware version 4.xx
Set the measuring device to a value so that the digit directly before the point reflects the tens digit of the
desired number and the digit directly after the point the units digit. With Mahr Extramess 2000/2001 the two
