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6.8.1 User Mode
This is the normal operating mode that is used when identifying the phase of properties or
equipments. It provides all the required indications.
When in this mode, the displays used are as described in previous sections, but with the addition
of two further indications.
a.
Loss of Communications with the Reference Unit - indicated by the inner most LED
of each of the phase vectors switching on and off in turn, giving a rotation effect.
b.
Loss of GPS Information – The two outer LEDs of each of the three phase vectors
flashing on and off at the same time.
If the PIU is indicating either of the above conditions, then the displayed phase is not verified.
Also, the reference phase cannot be set if either or both of the above conditions are being
displayed. However, brief loss of GPS signal e.g. when shaded by buildings will not nullify the
displayed phase accuracy. However, the location (if uploaded) will not be known.
6.8.2 Engineering Mode
When in User mode a short press and release of the F3 button will change the operation mode
into the Engineering Mode.
If the PIU is operating normally and receiving all of the reference data and GPS information, then
the unit displays operate in the same way as when the unit is in User Mode. However, should
the unit not be working correctly, then this mode provides the user with further information:
a.
Outer portion of the Vector Display flashing – indicates that the reference phase has
not been set. This is the same as all three vectors displaying in User Mode. The PIU is
actually displaying the instantaneous phase of the E-Field probe. F1 will upload this
information and may be used to recover the detected phase.
b.
The inner most LED of each of the phase vectors switching on and off in turn, giving a
rotation effect – Loss of communications with the Reference Unit. This could be loss
of mobile phone connectivity or a problem with the reference unit. This indication is
also present in User Mode.
6.8.3 Status Mode
When in Engineering mode a short press and release of the F3 button will change the operation
mode into the Status Mode.
In this mode, the PIU will operate the same as when in User Mode but will now provide
additional status information:
a.
Gradient Display D2 will now display the units Battery Charge level.
A further short press and release of the F3 button will change the operation mode back to the
User Mode.
6.9 Error Indications
The PIU requires a minimum level of data and battery charge in order to operate.