Honeywell E-Mon Class 3200 User Manual

E-MON CLASS 3200 METER
21 62-0397—02
6.6.2 Current Sensor Diagnostics
The load current must be at least 1% of the meter’s rated load in order to use the
diagnostic function. Current sensor diagnostics can detect:
1. Reversed current sensors
2. Incorrect phase correspondence
3. Unusually low power factor (0.642 or lower)
CT Error: (ABC) is used to detect the swapping of current sensor phases. This
message could (in some rare cases) indicate a low (<65%) power factor condition.
This message may appear intermittently due to changes in line conditions. It
should not be on continuously. (See Section 6.4.1.)
NOTE: If you have connected the current sensor to all three terminals and the
error message is still appearing, reverse the black and white wires and
repeat the previous steps until the correct connection is found.
If the CT Error: message disappears, you have found the correct sensor
connection; however, the current sensor was not installed properly around the
conductor, or the sensor wires were extended and not spliced together correctly.
Correct the sensor installation, reconnect the black wire to the black terminal and
the white wire to the white terminal on the plug and reinstall the plug into the
correct phase terminal for that current sensor. The error message should
disappear and the current sensor is now installed properly.
If the CT Error: message does not disappear at any time while trying all 3 inputs
both ways, check the AC voltage input from the current sensor between the black
and white wires using an AC voltmeter. It will read approximately zero volts
indicating that the load current is very small (or zero) or the current sensors are
not secured properly (tight connection between core halves or lead splices not
secure.)
Once the first current sensor is connected properly and the error message
disappears, repeat the previous procedure for the remaining two current sensors.
When all error messages have disappeared and all sensors are installed correctly,
the meter is operational.
6.7 RS-485 Wiring
RS-485 communication allows a computer or modem to communicate with one
or more E-Mon Class 3200 meters. You can connect as many as 52 meters along
a 4000 foot RS-485 cable run.
E-Mon Class 3200 Smart meters are available with your choice of
communication options: Modbus, BACnet, Honeywell E-Mon Energy (EZ7)
standard. There are two communication protocols supported by the RS-485
connection; EZ7 and Modbus RTU. The protocol is selectable via DIP switch S2,
located on the Main Power Board. If S2 position 1 is in the ON position, EZ7 is
active. If S2 position 1 is in the OFF position, Modbus RTU* is active. S2 position 2
is not used on the Class 320. DIP switch S2 positions 3 and 4 to select the Baud
rate for the RS-485 communications. See section 6.9.3 for details on Baud rate
selection. After changing the DIP switch positions, the CPU must be rebooted by
pressing S1 to activate the changes.
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Honeywell E-Mon Class 3200 Specifications

General

Brand	Honeywell
Model	E-Mon Class 3200
Category	Measuring Instruments
Language	English