SA9607P
LED Pulse-rate (CLED)
Channel Select Mode (CS)
Two bits of byte D22 allow for the selection of 3 different LED
Pulse-rates as follows.
For calibration purposes, the source for the energy metering
may be selected from a specific channel. The ELT-indication
is not influenced, but the metering is taken from the selected
channel only. For normal operation, the channel select mode
is set to automatic mode so that the larger of the two channels
are used for energy measurement. Bits 3 and 2 of byte D26
sets the channel select mode as follows:
D22[1]
D22[0]
Calibration LED - Output
0
0
1
0
1
-
6400 p/KWh
3200 p/KWh
1252 pulses/second @ rated for
fast calibration
D26[3] D26[2] Metering Source
-
0
Automatic, channel 1 or 2 whichever
shows higher consumption
Refer to LED output section for details on the LED pulse width.
Counter Pulse-Width (CPW)
1
0
1
1
Channel 1
Channel 2
The pulse width for the mechanical counter driver output is
selectable to accommodate various step-motor and impulse-
counter requirements. Bit 6 from byte D24 selects the pulse
rate as follows:
Earth Leak Compensation (NE)
Earth leakage in domestic wiring systems could result in
tamper detection at low current levels. The SA9607P caters
for these conditions, by taking possible earth leakage into
account when comparing the power consumption on live and
neutral.
D24[6]
Counter Pulse-Width
71ms
0
1
142 ms
Counter Resolution (CRES)
The value for the permissible earth leakage is usually around
30mA. It has to be adjusted according to the rated meter
condition and allows for derivations from the 30mA value. The
actual value of the leak current can be calculated from the
following formula:
Bit 1 and 0 from byte D24 allow for the selection of 3 different
counter resolutions. Note that one energy pulse is represented
by a MOP pulse followed by a MON pulse.
D24[1]
D24[0]
Counter Resolution
1 p/KWh
0
1
-
0
0
1
Ileak = Rated current x Ne
10 p/KWh
100 p/KWh
Ileak is the earth leakage current in mA used for correction.
Thisvalueissubtractedfromthedifferencemeasuredbetween
live and neutral power.
Ne is made up of bits 1 and 2 of byte D26 and can be set as
follows:
D26[1] D26[0] Ne factor
0
0
1
0
1
-
0.15
0.076
0.032
8/12
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