Functions
7.4 Hardware key
SITRANS FUS080 transmitter
Operating Instructions, 07/2012, A5E03059912-02
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7.4
Hardware key
HW key
To gain access to protected parameters of the transmitter, a hard-ware jumper (HW key)
must be installed as shown below. The HW key place is located internally on the right top
part of PCB behind the display as shown.
Figure 7-3
HW key behind the display (pins to the right)
Note
Important
In this mode, with the HW key installed, many parameters in PDM are opened. If these
parameters are changed, it can seriously affect the meter accuracy and operation. Be careful
when writing new parameters.
Changing the HW-protected parameters
1.
Disconnect power supply to transmitter, i.e. battery plug and/or the mains power supply
2.
Remove frame and display from transmitter.
3.
Insert HW key as shown in figure above.
4.
Remount display and frame on transmitter.
5.
Restart device.
6.
Make parameter changes via PDM.
7.
Download parameter changes to device.
8.
Remove HW key by following the steps above.