General Operation
CM-2201/CM-2202
©2018 Nelson Heat Tracing Systems
www.nelsonheaters.com
GA2497 Rev.6
6
5.1
Display
The CM-2201/CM-2202 utilizes a 2-line x 16-character
alphanumeric display viewable from the front keypad. The top
line is reserved for the function or operation and the
bottom line displays the value range.
5.1.1
Navigation for CM2201
The CM2201 monitors one heating circuit consisting of load
(typically a heating cable) and controls the load based on the
temperature of the item being heated (typically a pipe) as
provided via one or two RTD’s attached to the pipe and
connected to the controller. To monitor the load, press
Actual until “Operating Values” is displayed, then press
Right or Left arrow to scroll through the various values.
To review the statistics that have been collected, press Actual
until “Statistics” is displayed then press Right or Left arrow to
scroll through the various statistics.
To change the control and monitoring settings (including
alarm settings), press the
Program key and then Right or
Left arrow to scroll through the various settings. Any
setting can be altered by pressing the Up or Down arrow.
Note that a 4-digit password may be required to change
certain settings – when required, the cursor will flash on the
leftmost digit – use the Up arrow to increase this digit value
or the Down arrow to decrease it. Move the cursor to the
second leftmost digit using the Right or Left arrow and it
will flash until adjusted using
Up/Down
arrows. When the last digit has been selected, press Enter
and then changes will be allowed to the setting. Once the
setting is adjusted, press the Enter key to store it.
To view alarms, press the Alarms key and then Right or
Left arrow to scroll through the various alarms. Alarms
that are not active can be erased by pressing the Reset
key.
5.1.2
Navigation for CM2202
The CM2202 can monitor/control two separate heating
circuits (channels). The controller defaults to Channel 1
upon first start-up. All parameters for Channel 1 can be
displayed and modified using standard techniques
as described for the CM2201 in Section 5.2.1.
To change to Channel 2, simply press the “Actual”
key and then Right arrow – the active channel will
be displayed. To change the channel, press the Up
arrow.
In general, when the active channel is displayed (e.g.
"CH.2"), the channel can be changed by pressing the
Up or Down arrow.
