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SWITCH #
ON/OFF
SW1 – 1:
ON
SW1 – 2:
ON
SW1 – 3:
ON
SW1 – 4:
Not used
Termination Resistor
The CG1000 is equipped with a termination resistor that can be used for
the last CG1000 on the network. Switch 3 on SW1 of the display module
allows you to place a 120-ohm termination resistor into the RS-485 circuit.
Switch 3 ON = Termination Resistor in Circuit
You may need to experiment to get optimum performance over long
lengths of communication wiring to see if having a termination resistor on
the last CG1000 analyzer on the network improves communications.
Remember to insert a termination resistor only on the last CG1000 on
the network and not on all the CG1000 analyzers.
NOTE
The factory default setting is to have Switch 3 turned OFF, allowing for no
termination resistor in the circuit.
Select 115/230 Volt Operation
To change selected voltage, disconnect the AC line power cord from the
analyzer, open the top cover of the power entry module using a small-
blade screwdriver, select the desired voltage by rotating the fuse holder so
the desired voltage aligns with the window, then snap into place.
If you later want to switch the voltage source for the analyzer, you will
also need to change the fuses in the power entry module:
115 VAC - Fuse Rating: 2 amp, 250 VAC - Slow Blow
230 VAC - Fuse Rating: 1 amp, 250 VAC - Slow Blow
The fuse sizes are 1/4" x 1 1/4". Do not use 5 x 20 mm fuses.
Termination Resistor
Sets type of RS485 communication
Termination Resistor
Installation
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3-11
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