Emerson NELSON HEAT TRACE CM-2201, NELSON HEAT TRACE CM-2202 Installation And Operating Instructions Manual

™

NELSON

CM-2201/CM-2202

HEAT TRACE CONTROLLERS

Installation and Operating Instructions

Contents

CM-2201/CM-2202

©2017 Nelson Heat Tracing Systems

www.nelsonheaters.com

2

1.0

Introduction 4

1.1 Getting Started

2.0

3.0

4.0

5.0

General Application Information 5

Installation 6

3.1 Selecting Installation Location

3.2 Mounting

3.3 Wiring

Initial Set-up

4.1 Display Modes

4.2 Password Protection

4.3 Security Levels

General Operation

5.2 Display

5.3 Keypad

5.4

LED Functions

5.5 Monitoring

5.6 Alarm Management

5.7 Current-Limiting Feature

5.8 Ground Faults

5.9 Soft Start Feature

8

6.0

7.0

Control Modes

6.1 On-Off Control

6.2 Proportional Control

6.3 Forced Control Feature

Programming

7.1 Setpoints

7.2 Heater Setup

7.3 System Setup

8.0 Communications

9.0 Troubleshooting

10.0 Maintenance

11

12

18

20

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GA2497 Rev.5

CM-2201/CM-2202

Contents

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3

Appendix A – Specifications

25

Appendix B – Wiring Diagrams

Appendix C – Typical Installation Diagram

Appendix D – Modbus Parameters

Appendix E – RTD Tables

Appendix F – Warranty

26

28

29

39

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4

Introduction

1.1

Introduction

The Nelson Heat Trace CM-2201 is designed to monitor and
control one heating circuit in ordinary and Class I, Division 2,
Class I, Zone 2, and Zone 2 hazardous locations.

The CM-2202 can monitor/control two heating circuits in
those same locations.

This manual provides information pertaining to the Installation,
operation, testing, communications and maintenance of these
controllers. See Appendix A for detailed specifications

1.2

Getting Started

The CM-2201/CM-2202 is typically connected to external RTDs,
power or communication based on Appendix B and C. Detailed set­up of the operating/control/monitoring
throughout the following sections.

For addition help, call Nelson Technical Support or follow the
Troubleshooting section.

program is entered

CM-2201/CM-2202

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5

CM-2201/CM-2202

Application Information

2.0 General Application Information

The CM-2201/CM-2202 are designed to operate on input
voltages between 100 and 277 Vac and 50/60Hz. Load
switching is handled by a 2-Pole solid-state relay and can
control resistive loads of 30A continuous @ 40°C ambient.

The CM-2201/CM-2202 are designed to control heating
circuits by monitoring one or two temperature inputs for
each circuit via industry standard 3-wire, 100Ω, Platinum
RTDs. The two separate RTDs for each circuit maybe
utilized to customize the temperature control inputs.
Several different modes are user
sensor failure operational

The CM-2201 and CM-2202 can be operated in
temperatures of -40°F t o +104°F (-40°C to +40°C).

mode.

selectable as well as the

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Installation and Initial Set up CM-2201/CM-2202

3.1

Installation

The CM-2201/CM-2202 must be installed only in areas for
which it has been approved and in accordance with all
applicable electrical codes and ordinances. All conduit entry
holes must be appropriately installed and sealed to maintain
ingress protection rating.

Do not install this unit prior to functional testing if shipping
container or internal packaging shows signs of damage.
Notify the appropriate individuals immediately if damage is
suspected.

3.2

Selecting Installation Location

The CM-2201/CM-2202 should be installed in an area
protected from the elements as much as possible. It is
possible to install the unit in unprotected areas but such
often limits maintenance/access. Further, installation in
unprotected areas must be carefully considered to ensure it
is always in operating conditions consistent with
specifications. See Appendix A for additional details.

implemented by connecting appropriate jumpers.
Refer to Wiring Diagram in Appendix B for details.

3.3

Mounting

The CM-2201/CM-2202 should be mounted at a convenient
height to suit operator interaction. Conduit entries should
be made in the bottom of the enclosure to prevent damage to
the internal electronics from moisture intrusion. Conduit
entries should be drilled and the use of suitable bushings is
required to maintain the environmental ratings.

3.4

Wiring

Electrical wiring diagrams and schematics are provided in
Appendix B and C of this manual. Ensure that all wiring
and connections are in accordance with applicable wiring
codes. Enclosure grounding must be in accordance with
applicable wiring codes for non-metallic devices.

The power supply for the CM-2201 is derived from the
power provided for the load. However, the power supply
for the CM-2202 can be provided independent of the
power supply for the loads being controlled. For
example, the power supply for the CM-2202 can be 120
VAC while the loads being controlled can be 277 VAC.
Further, the power supply for the CM-2202 may also be
derived from either of the loads being controlled – this is

6

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7

CM-2201/CM-2202

4.1

Initial Set-Up

Upon initial power-up, the CM-2201/CM-2202 display will
run self-check, display the software version and then start
the main program.

4.2

Display Modes

This feature
displayed during normal operations. If set to “normal user” only
basic information i
controller information is displayed. Each parameter shown in
this manual will list the Display Mode required to view
information and access each function duringprogramming.

4.3

Password Protection

The CM-2201/CM-2202 may have password protection enabled
to ensure that sensitive operating parameters are not
inadvertently adjusted. If password protection is enabled,
the user will be prompted to enter a valid value to access any
protected features. The user may also replace the default
password value (1234) with their own unique value for greater
protection of operational parameters.

determines what messages and functions are

s displayed. If set to “advanced user” all

Installation and Initial Set up

4.4

Security Levels

CM-2201/CM-2202 has two levels of security. The high level
(Advanced Display) requires password protection. Disabling
the password from the Password Enable/Disable menu will keep
the password disabled indefinitely – any parameter can
changed without the use of a password. At this level all the
functions and monitoring parameters are open. The low
level (Normal Level) does not give access to parameters
settings, but is open for few parameters monitoring like
temperature, current, GFI, etc.

If the password is “Enabled”, when going directly to the
parameter to be changed, after the ‘up’ or ‘down’ arrow is
pressed, the controller will ask for the password. Then the
parameter can be changed and saved. The password will
disabled for 15 min, then be automatically re-enabled.
the 15 min period when the password is disabled,
parameters can be changed and saved.

be

stay

During

other

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CM-2201/CM-2202

5.1

General Operation

5.2

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.

General Operation

5.2.2 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.

5.2.1 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
Values” is displayed, then press
scroll through the various values.
To review the statistics that have been collected,
press Actual

Right

or

statistics.

To change the control and monitoring settings
(including alarm settings), press the
then

Right

settings. Any setting can be altered by pressing the

Up

or
may be required to change certain settings – when
required, the cursor will flash on the left most 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.

until “Statistics” is displayed then press

Left

arrow to scroll through the various

or

Left

arrow to scroll through the various

Down

arrow. Note that a 4-digit password

Actual

Right

until “Operating

or

Left

Program

arrow to

key and

To change to Channel 2, simply press the “
key and then
displayed. To change the channel, press the Up

In general, when the active channel is displayed
(eg. "CH.2"), the channel can be changed by
pressing the Up or Down arrow.

right

arrow – the active channel will be

Actual”

arrow.

To view alarms, press the
or

Left

arrow to scroll through the various alarms.
Alarms that are not active can be erased by pressing
the

Reset

key.

8

Alarms

key and then Right

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General Operation

CM-2201/CM-2202

5.3 Keypad

The keypad is “capacitive” touch sensitive and keys
are activated by simply touching the area of the
desired key with a finger, even when wearing gloves.
Note that a stylus or other item used to touch the
keypad will usually not activate the keys.

5.4

LED Functions

LED indicators will show the status of the respective
functions. The power LED will be illuminated when the
controller is connected to a source voltage. The heater
LED will be illuminated when voltage is applied to any
heater. The system LED will illuminate if there is an
internal hardware issue with the controller. The comm
LED will illuminate when the controller is sending data
through external communication. The alarm LED will
flash when there is a current active alarm condition or any
circuit; the alarm LED will illuminate solid when an alarm
was previously present but is not currently active.

5.5

Monitoring

By touching the“

Actual”

button follow the arrow
and the controller will scroll through all
the activeparameters.

5.6

Alarm Management

All alarm(s) will be saved in the alarm log. If no
alarms are active (alarm LED solid red) the Alarm
LED can be turned off by touching “Reset” once for
every alarm that previously occurred. If any alarm is
active (alarm LED flashing red) the user cannot reset
the alarm. The two alarm relays are SSR type. To set
the contacts of the relays go to Settings – Heater
Setup – Alarm contact. By choosing up/down arrow,
the contacts can be selected to function as Normally
Open or Normally Closed. Press “Enter” to save the
selection. Note: By setting the contacts to NC,
these contacts will be open when there is no power
applied to the unit (this can be useful for signaling
loss of power to the unit) OR there is an active

alarm OR there previously was an active alarm that
has not been acknowledged.

5.7

Current-Limiting Feature

The Current-Limiting feature operates similarly to the
Soft-Start in that it restricts the amount of time the
cable is energized during any given period thereby
reducing the average current draw of the cable
during that period. For example, if a cable normally
draws 8 Amps, but current limit is set to 6 Amps, then
the cable would be energized only 75% ofthetime.

5.8

Ground Faults

Ground faults typically are the result of damaged or
improperly installed cables which allow current­carrying conductors/surfaces/parts to be in contact
with grounded objects. For example, if a heating
cable has been secured to a pipe with a clamp, and
if the clamp has been overtightened, then the
ground braid and/or the pipe may come in contact
with current carrying parts within the cable. This
would result in current leakage to ground through the
ground braid of the cable and/or the pipe itself. This
type of fault can eventually become serious, resulting
in overheating/fire/shock hazards. Current leakage to
ground can be monitored by electronic circuitry and
the SPC can be programmed to either alarm or trip
when leakage

cu r r e n t e x c e e ds t he s p e c i f i e d

ma x i m u m a l l ow a bl e a m o u n t .

The alarm contacts function as follows:

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CM-2201/CM-2202

General Operation

5.9 Soft-Start Feature

The Soft-Start feature enables self-regulating cables to be
energized at low temperatures without causing excessive load
on the electrical system and extending cable life by reducing
cable internal heating due to inrush currents. The
of self-regulating cables decreases as the cables get
colder, which results in higher current and can result in
breaker trips if temperatures are very cold and the
installed length of cable is long. The Soft-Start feature
operates by initially only energizing the cable for a very short
period of time – while the current draw may be high during
this period, the period is usually short enough to reduce
average load on the electrical system.

This short energization period is repeated and eventually
increased; after a few minutes, the cable is usually warm
enough
current decreased to the point where it can be continuously
energized.

such that the resistance has increased and the

resistance

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10

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Control Modes

CM-2201/CM-2202

6.1

Control Modes

The CM-2201/CM-2202 allows the user to select different
control modes based on their individual process control
parameters.

6.2

On-Off Control

This control method simply energizes the cable until the
actual monitored temperature rises to the set point value
plus half the deadband value (upper limit). The cable is then
de-energized until the actual monitored temperature

drops to
the setpoint value minus half the deadband value. Note that
this type of control can result in some temperature
“overshoot;”. This is because the cable is de-energized when
the monitored temperature reaches the upper limit.

However,
the residual heat in the cable continues to transfer to the
pipe, and this will cause the pipe temperature to increase
slightly above the upper limit. Similarly, there can be some
temperature “undershoot.”

6.3

Proportional Control

This control method uses the typical proportional control
algorithm wherein the cable is cycled on and off at a rate
proportional to the difference between the setpoint value and
the actual monitored temperature. As the difference
between the set point value and the actual monitored
temperature increases, the amount of time the cable is
energized increases proportionately. This helps reduce the

“overshoot”and“undershoot”commonly associated with

On/Off control.

B) If the Temperature setpoint is a specific value

(eg 55C), then the setpoint will be maintained as
per normal operation ONLY when the external
signal is present or the external contact is closed
– otherwise, the heater will be disabled.

6.4

Forced Control Feature

This control method simply allows the user to force the
cable on or off as desired using an external signal (eg +5
VDC or 24 VAC) applied to the IN and G terminals or an
external dry contact across the +5V and IN terminals.
The External Disable must be set to “ON” to allow for
external control, at which point the controller operates
as follows:

If the Temperature setpoint is “OFF” or “None”,

A)

then the heater gets energized by applying the
external signal or closing the external contact.

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CM-2201/CM-2202

Programming

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7.1 Programming

7.2 Program-Setpoints

7.2.1 Setpoint Value

This message displays the name of the sub-menu when
entered.

7.2.2 Maintain Temp

This value sets the control setpoint temperature for all
operating modes. For On-Offcontrol, the circuit is
energized if the control temperature is less than the
maintain temperature minus the deadband. The circuit is
de-energized if the control temperature is greater than
the maintain temperature plus the deadband. If maintain
temp is set to None then the heater circuit will have
temperature monitoring with no control temperature. If the
maintain temp is set to Off then the heater circuit will have
no temperature monitoring or control.

7.2.3 Low Temp Alarm

This value sets the Low Temperature Alarm setpoint. It
must be less than the maintain temperature minus the
Deadband. To disable this alarm set the value to “Off’.
When the measured temperature of either RTDA or RTD
B (if activated) is less than or equal to this setpoint,the
Low Temperature Alarm is activated and a “LOW TEMP
ALARM” message is added to the alarm stack. This
alarm deactivates when the temperature rises above
the alarm setpoint value.

1.

Display Mode: All

2.

Range: N/A

3.

Default: N/A

1.

Display Mode: All

2.

Range: -50 to 500°C, none or -58°F to 932°F,
none, Off

3.

Default: 10° or 50°F

1.

Display Mode: All

2.

Range: -50C to Maintain Temperature, Off, -58°F to
Maintain Temperature, Off

3.

Default: 5°C or 41°F

4.

Restrictions: Message does not exist if Maintain
Temperatureis set to Off.

7.2.4 High Temp Alarm

This value sets the High Temperature Alarm setpoint.
It must be greater than the maintain temperature plus
deadband. To disable this alarm set the value to “Off”.
When the measured temperature of either RTDA or RTDB (if
activated) is greater than or equal to this set point, the High
Temperature Alarm is activated and a “HIGH TEMP ALARM”
message is added to the alarm stack. The alarm deactivates
when the temperature falls below this alarm

1.

Display Mode: All

2.

Range: Maintain Temperature to +500°C, Off,
Maintain Temperature to +932°F, Off

3.

Default: Off

4.

Restrictions: Message does not exist if Maintain
Temperatureis set to Off.

7.2.5 Low Current Alarm

This value sets the Low Current Alarm setpoint. It must be
less than the high current alarm setpoint. To disable this
alarm set the value to “Off’. When the heater current is less
than or equal to this setpoint, the Low Current Alarm is
activated and a “LOW CURRENT ALARM” message is added
to the alarm stack. The alarm deactivates when the Heater
Current rises abovethis alarmsetpoint. Note: This set point
is based on the heater at 100% power. If Proportional
Control or Current Limiting is enabled, all current
measurements will be scaled to 100% power, based on a
constant resistive load, before being compared to the alarm
setpoint.

7.2.6 High Current Alarm

This value sets the High Current Alarm setpoint. It must be
greater than the low current alarm setpoint. To disable this
alarm set the value to “Off’. When the heater current is
greater than or equal to this setpoint, the High Current Alarm
is activated and a “HIGH CURRENT ALARM” message is
added to the alarm stack. The alarm deactivates when the
heater current falls below this alarm set point. This

is based on the heater at 100% power.

1.

Display Mode: All

2.

Range: 0.1A to High Current Alarm, Off

3.

Default: Off

set point.

setpoint

GA2497 Rev.5

Programming

CM-2201/CM-2202

7.1.6 High Current Alarm Continued

If Proportional Control or Current Limiting is enabled, all
current measurements will be scaled to 100% power, based
on a constant resistive load, before being compared to the
alarm setpoint.

1.

Display Mode: All

2.

Range: Low Current Alarm to 30.0A, Off

3.

Default: Off

7.1.7 Ground Fault Alarm

This value sets the Ground Fault Alarm setpoint. It must be
less than the ground fault trip setpoint. To disable this
alarm set the value to "Off'. When the Ground Fault Current

greater than or equal to this setpoint, the Ground Fault
Alarm is activated and a "GROUND FAULT ALARM" message
is added to the alarm stack. The alarm deactivates when
the Ground Fault Current falls below this alarm setpoint.

1.

Display Mode: All

2.

Range: 10 to Ground Fault Trip, Off

3.

Default: 30mA

is

Low Voltage Alarm Continued

1.

Display Mode: All

2.

Range: 85VAC to High Voltage Alarm, Off

3.

Default: Off

7.1.10 High Voltage Alarm

This value sets the High Voltage Alarm setpoint. It must
begreater than the Low Voltage Alarm setpoint. To
disable this alarm set the value to “Off’. When the Heater
Voltage is greater than or equal to this setpoint, the High
Voltage Alarm is activated and a “HIGH VOLTAGE ALARM”
message is added to the alarm stack messages. The
alarm deactivates when the Heater Voltage drops below
this alarm

7.2

setpoint.

1.

Display Mode: All

2.

Range: Low Voltage Alarm to 280VAC, Off

3.

Default: Off

Program- Heater Setup

7.1.8 Ground Fault Trip

This value sets the Ground Fault Trip setpoint. It must be
greater than the ground fault alarm setpoint. To disable this
trip alarm set the value to “Off’. When the Ground
Fault Current is greater than or equal to this setpoint, the
heater circuit is de-energized, the Ground Fault TripAlarm
is activated and a “GROUND FAULT TRIP” message is added
to the alarm stack.This is a latching alarm and trip.
When the cause of the alarm has been corrected, the
circuit may

7.1.9 Low Voltage Alarm

This value sets the Low Voltage Alarm setpoint. It must be
less than the high voltage alarm setpoint. To disable this
alarm set the value to “Off’. When the Line Voltage is less
than or equal to this setpoint, the Low Voltage Alarm is
activated and a “LOW VOLTAGE ALARM” message is added
to the alarm stack. The alarm deactivates when the Line
Voltage rises above this alarm setpoint.

be energized by the manual reset function.

1.

Display Mode: All

2.

Range: Ground Fault Alarm to 500mA, Off

3.

Default: 50mA

7.2.1 Heater Setup

This message displays the name of the sub-menu when
entered.

7.2.2 Enable Heater

This selection enables control and monitoring of the heater
circuit. Setpoints and measured value messages cannot be
accessed unless the heater is enabled. Select “No” if the
circuit is not used.

1.

Display Mode: Advanced

2.

Range: N/A

3.

Default: N/A

1.

Display Mode: All

2.

Range: yes, no

3.

Default: yes

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CM-2201/CM-2202

Programming

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www.nelsonheaters.com

7.2.3 Heater ID

This selection allows for user defined Heater Identification.
It provides a unique, identifiable tag or label for each heater
circuit. The Heater Name allows up to 20 alphanumeric
characters which are entered one at a time from left
to right. The cursor indicates which character is being
selected. Press the [SELECT UP/DOWN] arrow keys to change
the character. Move to the nextcharacter by pressing [NEXT]
arrow. Press [ENTER] in the last character position to save the
Heater ID.

1.

Display Mode: Advanced

2.

Range: 20 Characters

3.

Default: Blank

7.2.4 Manual Override

This selection sets the response of the heater circuit to the
Override inputs. The Override inputs respond to contact closure.
If the Over ride is set to “Off”, the over ride inputs are ignored
and control of the heater circuit operates normally based on the
measured temperature and maintain temperature setpoint. If
the Override is set to“On”, an open contact on the Override
inputs forces the heater Off. When the contact on the Override
input is closed, the heater control resumes in normal manner.

1.

Display Mode: Advanced

2.

Range: On, Off

3.

Default: Off

7.2.5 Deadband

The Deadband is defined as the difference between the
setpoint temperature and the actual maximum temperature
that is ideally allowed in excess of the setpoint temperature.
Decreasing the deadband increases the temperature control
accuracy but also increases the heater switching frequency.

1.

Display Mode: Advanced

2.

Range: 1 C° to 5 C°, 1 F° to 10 F°

3.

Default: 2 C° or 5 F°

4.

Note: Deadband is disabled for Proportional Control
mode.

Control Type

This selection determines the type of control method
used by the controller, either On-Off (Deadband) or
Proportional
for all heating devices. Proportional Control mode is only
available for series type heating devices.

Warning:

for use with self-regulating heating cable types due to
the constantly changing characteristics of self-regulating
cables – this will cause the control to be unstable. Further,
the continual cycling associated with Proportional Control
result in internal heating of the cable and lead to reduced
life expectancy.

5.

Display Mode: Advanced

6.

Range: On-Off, Proportional

7.

Default: On-Off

8.

Selection does not exist if Maintain Temperature is set
to Off.

7.2.6 Current Limiting

This selection sets the maximum average current limit
allowed for the heater circuit. It is useful for reducing the
power output of constant wattage heaters. The load will be
turned on for a period of time and then turned off for a
period of time to maintain the average current draw to the
value set.

1.

Display Mode: Advanced

2.

Range: 0.5 to 30.0 A, Off

3.

Default: Off

4.

Note: The value range is in 0.5A increments.

7.2.7 Soft Start Mode

This function ramps the heater output from Off to nominal
current of the heater over the set soft start cycle time. It
is useful for reducing inrush currents of self-regulating
heaters. At the end of the soft start cycle time, the load will
no longer be controlled by the soft start function.

1.

Display: Advanced

2. Range: 10 to 999 seconds, Off

3.

Default: Off

Control. The On-Off control mode is available

Proportional Control should never be selected

can

GA2497 Rev.5

14

Programming

CM-2201/CM-2202

7.2.8 Auto Test Cycle

This value sets the frequency at which the Auto Test Cycle is
activated. Auto Test is a feature that exercises the system by
automatically applying power to the heater at specified
time intervals. If an alarm condition is detected during this
period the Auto Test Alarm is activated and an “ALARM
DURING AUTO TEST” message is added to the System Status
messages. This is a latching alarm. To clear the alarm,

locate the alarm messsage in the Alarm Menu and press
[ENTER].

The Auto Test Cycle does not operate if heater is forced off for
any reason, including ground fault trip.
Auto Test decreases maintenance by providing an early
warning of problems that would otherwise go undetected
until the heater was needed.

7.2.9 RTD Operation

This selection determines how the control temperature is
utilized by the RTD inputs.

In One RTD Mode, the temperature is based on the measured
temperature from RTD-A.

In Backup Mode, control temperature is based on RTD-A.
If for any reason RTD-A fails, then RTD-B takes over.

To disable this feature, set the value to “Off”.

1.

Display Mode: Advanced

2. Range: 1 to 720 hours, Off

3.

Default: 24 hours

Functions requiring two RTDs to operate, such as Average,
Lowest, Highest and High Temperature Cutoff, will

operate in One RTD mode if one of the two

7.2.10

This selection sets the controllers fail-safe mode. The
controller detects if RTD-A has failed and will use RTD-B if
available. If RTD-B is not installed or has also failed, the
heater will be set to its fail-safe state as selected in
this mode. For freeze protection where there is no

hazard from overheating, you may select "On" to operate
the heater continuously and prevent freeze up.

For processes where there is a potential hazard from
overheating, you may select “Off”, to de-energize the circuit
until one of the RTD’sbecomes available.

RTD Operation Continued

1.

Display Mode: Advanced

2.

Range: One RTD, Backup, Average, Lowest, Highest,
High Temperature Cutoff

3.

Default: One RTD

4.

Restrictions: Message does not exist if Maintain
Temperature is set to Off.

RTD Failure Mode

1.

Display Mode: Advanced

2.

Range: On, Off

3.

Default: Off

4.

Restrictions: Message does not exist if Maintain
Temperature is set to Off.

RTDs fail.

In Average Mode, the control temperature is based on the
average of RTD-A and RTD-B measured temperatures.

In Lowest Mode, control temperature is basedon the lowest
of the two temperature measurements.

In Highest Mode, control temperature is based on the
highest of the two temperature measurements.

In High Temperature Cutoff Mode, control temperature is
based on RTD-A, but if the temperature from RTD-B
exceeds the high temperature alarm, the heater is turned
Off and a high temperature alarm is activated. The High
Temperature cutoff mode will operate in one RTD mode if
the high temperature alarm is turned Off.

©2017 Nelson Heat Tracing Systems

7.3

Program– System Setup

7.3.1 System Setup

This message displays the name of the sub-menu when
entered.

7.3.2 Password

This selection determines if password protection is required
for programming changes. The display will show “disable”
if program access is currently enabled and show “enable” if
program access is currently disabled.

www.nelsonheaters.com

1.

Display Mode: Advanced

2.

Range: N/A

3.

Default: N/A

1.

Display Mode: All

2.

Range: Enable or Disable

3.

Default: Enable

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CM-2201/CM-2202

Programming

©2017 Nelson Heat Tracing Systems

www.nelsonheaters.com

7.3.3 Change Password

This selection allows the user to change the default password.
The user is prompt to enter the old password, press [ENTER].
If verified, the user is then to enter the new password, press
[ENTER). The user is prompt to re-enter the new password.
By not entering a password and pressing [ENTER], the
controller assumes no password.

1.

Display Mode: Advance

2.

Range: Any combination of 2 to 16 characters 0 – 9,
A– Z.

3.

Default: 1234

7.3.7 Default Display

This function specifies the information that will be
displayed when no key has been pressed for the Display

Time out interval as described below.

VALUE

System status

Heater status

Heater temp

INFORMATION

DISPLAYED

Alarm status of all the

heaters
Alarm status of the
heater

Temperature of the

heater

7.3.4 Units

This selection determines the unit of measure for
temperature values. All temperatures are displayed in the
selected units of either Celsius degrees (C°) or Fahrenheit
degrees (F°).

1.

2.

3.

7.3.5 Operational Costs

This value sets the cost per kWh of electrical power. This is
used to calculate energy costs for operating this control
circuit.

1.

2. Range: $0.01 to 1.00

3. Default: $0.05

7.3.6 Display Mode

This selection determines what messages are displayed by
the controller for operations personnel. If set to "advanced

user" all messages are displayed.

only the basic messages are displayed. Each message
listed throughout this manual shows the Display Mode
required to see the message. “Advanced only” indicates
that the display mode must be set to “advanced user” to
view the message.

1.

2.

3.

Display Mode: Advance
Range: Celsius, Fahrenheit
Default: Celsius

Display Mode: Advance

If set to “normal user”,

Display Mode: All
Range: Normal, Advance
Default: Advance

Display Mode: Advance

1.

Range: System Status, Heater Status, Heater Temp

2.

Default: system status
Restrictions: Temperature messages are not

3.
if Maintain Temperature is set to Off.

7.3.8 Display Timeout

This function sets the length of time from the last key press,
to automatically return to the Default Display information.
Selecting “Off’ disables this function.

1.

Display Mode: Advance

2. Range: 5 to 600 seconds, Off

3.

Default: 120 seconds

7.3.9 Modbus Address

This selection sets a unique address to ensure only one
CM- 2201 attempts communications with the master unit
at any time. See Section 8.0 for complete information on
Modbus communications.

1.

Display Mode: Advance

2.

Range: 1 to 255 to accommodate multiple devices on
same network.

3.

Default: 1

7.3.10 Baud Rate

Sets the communication baud rate for the RS485 serial port.
All controllers connected to the same data highway must
operate on the same baud rate.

1. Display Mode: Advance

2. Range: 1200, 2400, 4800, 9600, 19200

3. Default: 9600

displayed

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16

Programming

CM-2201/CM-2202

7.3.11 Reset Module

This selection resets controller memory parameters to
factory default values. If the controllers memory becomes
corrupt, resetting the module will force the controller to
overwrite each register and may correct any problems that
exist.

1.

Display Mode: Advance

2.

Range: yes, no

3.

Default: no

7.4

Program- System Test

7.4.1 System Test

This message displays the name of the sub-menu when
entered.

1.

Display Mode: Advanced

2.

Range: N/A

3.

Default: N/A

Ground Fault Test

This function will test the ground fault trip function of the
controller t
controller will generate an artificial ground fault current;
the ground fault current is sensed as being greater than 30
mA, the test passes. The GF test function will verify actual
ground fault current and heater trip. Status of the test will
be displayed
If this test has been

passes, the user is prompted to reset the ground fault
trip, at which time the load is capa- ble of being re­energized as required. If this test has been invoked by
the “Autotest” option and it passes, the load is allowed
to be reenergized as required. If this test has been
invoked by the Autotest cycle and it fails, an Autotest
alarm is generated but the load is allowed to be
reenergized

4.

5.

6.

o ensure proper operation. When selected, the

as pass or fail.

as required.

Display Mode: Advanced
Range:Autotestcycle,Now,Disabled
Default: Disabled

invoked

by the “Now” option and it

if

7.4.2 Alarm Output Test

This function is used for testing and commissioning
purposes allowing the alarm output to be forced On either for
a short period of time or continuously. At the end of the
specified time duration, the testing option is automatically
disabled. The alarm test function will not operate if the
alarm configuration is set to disable and the message
“ALARM DISABLED” will appear.

1.

Display Mode: Advanced

2.

Range: 1-24 hours, Disabled, Continuously

3.

Default: disabled

7.4.3 Heater Test

This function overrides heater control for maintenance
purposes. For normal operation, set to “disable”. If a period
of time is selected, the heater is forced On or Off for the
selected interval. If “continuous” is selected the heater is
forced On or Off until “disable" is selected.

1.

Display Mode: Advanced

2.

Range: 1-24 hours, Disabled, On Continuously

3.

Default: disabled

©2017 Nelson Heat Tracing Systems

17

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GA2497 Rev.5

©2017 Nelson Heat Tracing Systems

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CM-2201/CM-2202 Communications

8.0 Communications

The Nelson Heat Trace CM-2201 supports a subset of the
Modbus® RTU protocol format that provides monitoring,
programming, and control functions using Read (03) and
Write (05-06) register commands.

8.1

General Information

Serial Port:

Select the serial portthat
corresponds to your RS-485
adapter. USB to Serial adapter
may be used for devices without

Baud Rate:

serial connections.
User Defined at 1200,
4800, 9600 or 19200

2400,

Data Bits: 8
Stop Bits:
Parity:
Device Address:

1
None
User Defined between 1 and 255

8.2

Modbus Registers

For all Modbus registers, see Appendix D.

Example of checking alarms via Modbus from a remote
terminal.

Controller SETTINGS and Status used on this example:

a. Modbus address 04
b. Baud rate 19200; non-parity; Stop bit 1.
c.

High Temperature alarm active

To check if any alarm is activated, send the

1.

following instruction:

04 03 0046 0026 2590
04 = controller Modbus number
03 = Modbus function code 3
0046 = start reading from data address
70
0026 = the next 38 addresses
2590 = CRC

The controller will answer with value 0x02 (High

2.

Temperature Alarm) active Alarm

Once the alarm condition has been resolved, the

3.

alarm can be cleared by sending the following
instruction:

04 05 0045 FF00 9C4C
04 =controller Modbus number
05 = Modbus function code 5

If the command to check if any alarm is

4.

activated (as shown in (1) above) is now sent to
the controller, and assuming no other alarms
have since been activated, the controller will
answer with 0x0000 (no active alarms).

To check the alarm log memory, issue the

5.

following instructions:

6.

The High Temperature Alarm will be listed here,
so the controller will answer 0x02. The Alarm
log can hold 20 alarms. After 20 alarms the

0045 = writing to data address 165
FF00 = erase command
9C4C = CRC

At this point the controller enters the
alarm into the alarm log memory and
clears the active alarm. To check the
alarm log memory, see below.

04 03 006E 0026 A598
04 = controller Modbus number
03 = Modbus function code 3
006E = start reading from data address

110
0026 = the next 38 addresses
A598 = CRC

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Communications

oldest alarm will be erased to allow for storage of
the new alarm. To erase all alarms on alarm log,
see below.

To erase all alarms on the Alarm log from the

7.

remote terminal, send the following instruction:

04 05 0097 FF00 3D83
04 = controller Modbus number
05 = Modbus function code
0097 = data address 151 to write FF00 =
command to erase all memory log.

3D83 = CRC

CM-2201/CM-2202

19

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CM-2201/CM-2202

Troubleshooting

9.1 Troubleshooting

Terminal No.

Description

GND Bus

Shield

RA

RTD A Source (RED)

WA RTDA Common (WHT)

RA

RTDASense(RED)

GND Bus

Shield

RB

RTD B Source (RED)

WB RTDBCommon(WHT)

RB

RTD B Sense (RED)

9.2

Operator Checks

Upon receipt of the controller, or to check the controller
for an indication of normal operation, follow the

operational procedures shown below.
These procedures are designed to familiarize the operator with

the controller and to provide an understanding of its operation.

In order to determine if a fault is associated with the heat
tracing, wiring or the controller, it will be necessary to
troubleshoot the wiring and tracer circuit. If the fault
remains, remove power from the controller and exchange it
with another controller. This may require some

reprogramming of the new CM2201/CM-2202.
Refer to the following sections for the appropriate topic.

9.2.1 RTDs

RTD failures after installation can generally be attributed
to incorrect wiring or improper installation of the sensor.

Troubleshooting of these failures is a very simple
procedure if the proper steps are undertaken in the
correct order. Some specific RTD problems and the correct

methods for troubleshooting are outlined as follows.

When wiring to theCM2201/CM2202, the terminals are marked

as follows:

The RTD manufacturer will typically color code the leads with
the source and sense being the same color, and the

common a different color. Ensure that the RTD extension
shield is terminated at one end only, normally using the
terminal block provided at the terminal board.

Note:

triad color code for the RTD connections. Usually, the RED
lead is the common connection (same as the White-White­Red color scheme) and the White and Black connections may
be used interchangeably.

wire

Some manufacturers use the common Black-White-Red

1. RTD Failure Alarm(s)

If the CM2201/CM-2202 controller indicates a failure of an
RTD:

a)

Ensure that the RTD is a 3-wire 100 (Platinum Type).

TURN THE POWER TO THE CONTROLLER OFF BEFORE
PROCEEDING!

b)

Disconnect the RTD wiring from the input terminals.

c)

Measure the RTD’s resistance between the source
(RED) and sense (RED) leads at the controller (it should
not exceed 40 Ω). Excessive lead resistance will cause
a RTD FAILURE ALARM and must be corrected. Look for
loose

terminals, excessive lead length, or insufficient wire

gauge and correct as necessary.

Measures the RTD’s resistance between the source

d)

(RED) or sense (RED) lead and the common (WHT) lead
of the RTD at the controller (should be between 60
and 330 Ω depending on the temperature and the lead
resistance. Verify that the RTD is wired correctly —the
heat tracing conrtrollers will always be terminated in

the

order: source

(RED), common(WHT), sense (RED).

2. Temperature Verification

If you consider that the indicated or displayed temperature
is not correct, thecontrollerandthe RTDcanbequickly
checked for correct operation. To verify the RTD:

TURN THE POWER TO THE CONTROLLER OFF BEFORE
PROCEEDING!

a)

Disconnect the RTD wiring from the input terminals.

b)

To calculate the temperature indicated by the RTD,
measure the resistance from source (red wire) or sense
(redwire) to common (white wire) and subtract the
resistance measured between source and sense. This
will give a compensated resistance value that can be
cross- referenced to one of the RTD tables found in
Appendix
resistance and
obtained from the RTD table to the indicated or displayed
value. These should agree
standards of the CM2201/CM2202 and the RTD.

E or Appendix F. Compare the measured

cross-referenced temperature value

to within the accuracy

20

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Troubleshooting

CM-2201/CM-2202

Note:

Ensure you refer to the correct RTD table for the type

of RTD you are using.

2. Temperature Verification ( Continued)

To verify the Controller:

TURN THE POWER TO THE CONTROLLER OFF BEFORE
PROCEEDING!

a)

Disconnect the RTD wiring from the input terminals.
Connect a 100 Ω resistor across the source or sense

b)

terminal and common. Insert a jumper between the
source and sense terminals.

Apply power to the controller.The indicated or

c)

displayed temperature should be about 3 2°F (0°C)
depending on the actual resistance of the test resistor
if RTD TYPE is
may have a +/- 10%

3. Unstable Temperature

An erratic indication of temperature can be caused by
several factors external to the controller. The controller’s
accuracy and resolution will result in an indicated
temperature change of a couple of degrees if the measured
resistance temperature falls between two discrete
values (this is sometimes referred to as quantization
error).
If the instability is excessive, check:

a)

Wire used for extension of the RTD should be three-wire,
twisted and shielded with the shield grounded at the
controller only. Each of the three lead wires must be of
the same gauge.

b)

The ideal installation has a separate conduit for the RTD
leads (if they have been extended).It is not usually a
problem to run low signal levels in the same conduit as
the power leads even in high power applications, as long
as the RTD wire is a twisted, shielded type with an
insulation rating equal to or greater than the highest
voltage in the conduit. Follow the proper Electrical Code
requirements for your particular installation.

c)

Check the specifications for the particular cable
being used to ensure that it does not have excessive
capacitance when used in long lengths.This can
cause a
reads and
normally not a problem since the controller compensates
for all but the worst cases of this.

temperature offset between what the controller

what the RTD actually measures. This again is

set to 100 Ω Platinum. Any resistor

tolerance.

3. Unstable Temperature (Continued)

Check one by one if the all RTD leads are connected to

d)

connector.

Lastly,it is possible for the RTD itself to fail on an

e)

intermittent basis but this failure mode should be
considered unusual. This kind of failure is probably the
most difficult to find but fortunately it is also the least
likely as a failure mechanism.

9.3 Ground Fault

Ground fault warning /alarms can be caused by incorrect
installation as well as current leakage resulting from wet
system components or damaged cables.

The CM2201/CM2202 Controller detects ground faults by
summing the outgoing and return trace currents through an
internal current transformer.Under normal operating
conditions (no ground fault condition) this current will be
zero. When there is a flow of current from one of the trace
supply wires to ground, a ground fault condition occurs.

If a ground fault alarm is present on start-up of a new
installation it is likely due to a wiring error or damaged
cable. To verify this condition:

a)

Check that the heating circuit neutrals return to
controller and are not connected directly to the
distribution panel. This can be a common problem if the
installation is a retrofit situation.

b)

On paralleled circuits, be certain that ALL neutrals

return. The late addition of a circuit may not be obvious

Note:

The controller monitors the integrity of the ground
fault(GF) detection. If a fault is detected, the controllerwill
generate a GFI warning/alarm depend of the settings.

9.4

Common Warnings/Alarms - What to Look for

The CM-2201/CM-2202 has a wide range of warning and
alarming features that may be selectively enabled or
disabled to allow the monitoring and indication of trouble
conditions. Described below are the different warming and
alarm conditions available on the CM-2201/CM-2202, their
meanings, and possible causes. The warning settings must
be below alarm settings. If an alarm will be activated the
two SSR low power will be activated.

the

the

.

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CM-2201/CM-2202

Troubleshooting

9.4.1 High RTD A/ RTD B Temperature Reading

This warning/alarm appear when the temperature exceeds the
HIGH RTD WARNING/ALARM temperature setting.

Cause ofWarning/Alarm:

Warning/Alarm temperature setting too close to maintain

•

temperature

•

Flow of hot product

•

Steaming out lines

•

Incorrect tracer wiring

9.4.2 Low RTD A/ RTD B Temperature Reading

This warning/alarm appears when the temperature
decreases below the LOW RTD WARNING/ALARM temperature
setting.

Cause ofWarning/Alarm:

•

•

•

•

•

9.4.3 RTD A/ RTD B Failure

This alarm indicates a sensor is not operating properly. The
temperature sensor may fail due to an “open” or “shorted”
condition.

Warning/Alarm temperature setting too close to maintain

temperature

Flow of cold product
Empty pipe
Damaged, wet, or missing insulation
Heating cable notsized properly for the application

High Current Warning/Alarm (Continued)

Cause ofWarning/Alarm:

•

Warning/Alarm setting too close to normal operating current

High in-rush current from “cold start” of self regulating

•

cable

•

Damaged or partially shorted heating cable

•

“As built” cable length is greater than design value

9.3.4 Low Current Warning/Alarm

This alarms current levels which are less than the LOW
CURRENT WARNING/ALARM setting.

Cause of Warnings/Alarm:

Warning/Alarm setting too

•

Low source voltage

•

•

Damaged or inoperative heating cable

•

Open connection—wiring problem

•

SSR or contactor failed open

9.3.5 High GFI Warning

This warning ground
than the HIGH GFI WARNING setting.

Cause of Warning:

•

Warning setting too close to normal leakage current

•

Damaged cable insulation and/or moisture present

•

Moisture in junction box

•

Poor splice or termination

•

Moisture provides conductive ground path which allows

ground fault current.

fault current levels which are greater

to normal operating current

close

Cause of Alarm:

Incorrect or damaged field wiring - open leads or excess

•

resistance (either intermittent or continuous) may be
due to broken or damaged wires or loose terminals.

•

Damaged or inoperative temperature sensors

9.4.4 High Current Warning/Alarm

This Warning/alarms current levels that are greater than the
HIGH CURRENTWARNING/ALARM setting for the application.

22

9.3.6 GFI Alarm

This value sets the upper limit of allowable ground fault
leakage. Exceeding this limit will result in the output switch
being latched off and the alarm activated to indicate a
ground fault condition.

GA2497 Rev.5

Troubleshooting

©2017 Nelson Heat Tracing Systems

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CM-2201/CM-2202

9.3.7 GFI Alarm (Continued)

Cause of Alarm:

•

Trip setting too close to normal leakage current

•

Damaged cable insulation and/or moisture present

•

Moisture in junction box

•

Poor splice or termination

•

Moisture provides conductive ground path which allows

ground fault current

9.3.8 High Voltage Warning/Alarm

This warning/alarms voltage levels that are greater than the
HIGH VOLTAGE WARNING/ALARM setting.

Cause ofWarning/Alarm:

•

Warning/Alarm setting too close to normal operating voltage

•

Incorrect wiring

•

Powersurge

9.3.9 Low Voltage Warning/Alarm

This warning/alarms voltage levels are less than the LOW
VOLTAGE WARNING/ALARM setting.

Cause ofWarning/Alarm:

•

Warning/Alarm setting too close to normal operating voltage

•

Damaged power cable

•

Incorrect VOLTAGE TURNS RATIO

•

“Brown-out” conditions

•

Loss of power to the circuit

Switch Failure

This alarm indicates that the controller senses current flow
when the output switch should
be off.

Cause of Alarm

•

Some other device energized heat trace

•

Output switch has failed “closed”

9.3.11 Power Limiting (Current Limiting)

This alarm indicates that the solid state relay is limiting
the average amount of power that is applied to the trace
circuit as defined by the MAXIMUM POWER setting.

Cause of Alarm:

•

Power applied to trace circuit is being limited to the

MAXIMUM POWER setting

9.3.12 EEPROM Data Failure

This alarm indicates that the controller has detected a
failure in its non-volatile memory (this is where all of the
controller’s configuration and calibration settings are
stored). This indicates an internal problem and the CM2201/
CM2202 should be replaced and returned to the factory for

repair.

Cause of Alarm:

•

The CM-2201/CM2202 cannot bypass the failed area of its

memory and has loaded factory defaults into this failed area.

9.3.10 Overcurrent Trip

If the controller is unable to start the cable due to high
current or after attempting to soft start it, the controller will
trip its output switch off.

Cause of Alarm:

•

Excessive in-rush current

•

Incorrect CM-2201/CM2202 settings

•

Incorrect wiring

•

Damaged cable

9.3.13 Continuity Failure

The “Continuity Failure” alarm indicates that the current
being drawn by the load is less than about 0.5 Amps and
hence the load is assumed to be disconnected.

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CM-2201/CM-2202

Maintenance

10.0 Maintenance

The CM-2201/CM-2202 should be regularly maintained as
follows:

a)

b)

c)
d)
e)

Do not use any cloth from synthetic material or similar. On
the cleaning process the front label may charge electrostatic
and by touching the front panel may generate sparks.

Check fit of door gasket and adjust as required. Clean
door gasket.
Verify that moisture is not entering enclosure; repair as
required.

Check terminals to ensure connections are secure.

Check wiring for any signs of overheating.

Clean front panel with mild soap on damp cloth.

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Appendices

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CM-2201/CM-2202

Appendix A– Specifications

Model:
Rating:

Maximum Current:
Frequency:
Switching:

Enclosure:
Alarm Outputs:

Agency Approval for
Hazardous Locations:

Temperature Code:

CM-2201/CM-2202
277Vac,30Amps(Solid State
Relays)
30 Amps per Channel
50 or 60 Hz
Solid State Relay (DPST)
Normally Open (NO)
NEMA 4X

1.

2. 30VDC@ Max. 0.1 Amps (Solid State Relay - requires Min. 50mA load)
cCSAus

Class1, DIV.2, Groups A, B, C, D
Class 1, Zone 2: IIC

T4 (135 °C)

24 VAC to277 VAC@Max.0.5 Amps (Solid State Relay - requires Min. 100mA load)

110–

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CM-2201/CM-2202

Appendices

Appendix B - Wiring Diagram: CM-2201

Notes:

1.

Solid State Contact

2.

Install Jumper at JP1 (120 OHM Resistor) on both terminals if CM-2201 is last device on network. Else install jumper on one terminal only of JP1.

3.

If “Force “ feature is activated by external “dry contact”, use “+5V” and “IN” terminals; Ground connection is not required. If activated by external voltage signal, use

“IN” and “G” (Ground) terminals as noted.

26

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Appendices

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GA2497 Rev.5
DRAFT

CONTROL POWER

SOURCE

PJ1

(L1 - CONN3)

PJ2

(L2/N - CONN3)

INDEPENDENT

NO CONNECTION

CH.1

L1 - CONN4

L2/N - CONN4

CH.2

L1 - CONN5

L2/N - CONN5

CM-2201/CM-2202

Appendix B - Wiring Diagram: CM-2202

Notes:

1.

All Alarms Output are SSR N.O.

2.

All RTD’s must have the Shield connected to Ground Bus.

3.

Remove Jumper JP1 only if the controller is in RS485 Network AND is not the last unit on the Network.

4.

Connect Power Supply Jumpers PJ1 & PJ2 as follows;

27

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GA2497 Rev.5
DRAFT

CM2202

CM·2201/CM·2202

PAJ'IEL BOARD

e

Appendices

Appendix

C -

Typical Installation Diagram

POWER

CONNECTION

-HEA

TRACE

CABLE

CONDUIT DRAIN

R'TIJA

RS485/Al.ARM

WIRING

D

\CS

POWE;R

CONNECTION

POWER

CONNECTION

HEAT TRACE

CABL'E CT2

CKT1

CON!ltJIT DRAIN

R'TIJA

28

Appendices

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GA2497 Rev.5
DRAFT

CM-2201/CM-2202

Appendix D

29

CM-2201/CM-2202

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GA2497 Rev.5
DRAFT

Appendices

30

Appendices

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GA2497 Rev.5
DRAFT

CM-2201/CM-2202

31

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DRAFT

Appendices

32

Appendices

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GA2497 Rev.5
DRAFT

CM-2201/CM-2202

33

CM-2201/CM-2202

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GA2497 Rev.5
DRAFT

Appendices

34

Appendices

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GA2497 Rev.5
DRAFT

CM-2201/CM-2202

35

Appendices

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GA2497 Rev.5
DRAFT

CM-2201/CM-2202

36

CM-2201/CM-2202

©2017 Nelson Heat Tracing Systems

www.nelsonheaters.com

GA2497 Rev.5
DRAFT

Appendices

37

Appendices

©2017 Nelson Heat Tracing Systems

www.nelsonheaters.com

GA2497 Rev.5
DRAFT

CM-2201/CM-2202

38

CM-2201/CM-2202

Appendices

©2017 Nelson Heat Tracing Systems

www.nelsonheaters.com

GA2497 Rev.5
DRAFT

Appendix E - RTD Tables

Temperature Conversion
Platinum Resistance (-200°C to 239°C)
Temperature Coefficient - 0.00385 Ohms/Ohm/OC

°C

Ohms

°C

Ohms

C

Ohms

°C

Ohms

°C

Ohms

°C

Ohms

-200

18.49

-137

45.11

-74

70.73

-11

95.69

51

119.78

114

143.80

-199

18.93

-136

45.52

-73

71.13

52

120.16

115

144.17

-198

19.36

-135

45.94

-72

71.53

-10

96.09

53

120.55

116

144.55

-197

19.79

-134

46.35

-71

71.93

-9

96.48

54

120.93

117

144.93

-196

20.22

-133

46.76

-8

96.87

55

121.32

118

145.31

-195

20.65

-132

47.18

-70

72.33

-7

97.26

56

121.70

119

145.68

-194

21.08

-131

47.59

-69

72.73

-6

97.65

57

122.09

-193

21.51

-68

73.13

-5

98.04

58

122.47

120

146.06

-192

21.94

-130

48.00

-67

73.53

-4

98.44

59

122.86

121

146.44

-191

22.37

-129

48.41

-66

73.93

-3

98.83

122

146.81

-128

48.82

-65

74.33

-2

99.22

60

123.24

123

147.19

-190

22.80

-127

49.23

-64

74.73

-1

99.61

61

123.62

124

147.57

-189

23.23

-126

49.64

-63

75.13

62

124.01

125

147.94

-188

23.66

-125

50.06

-62

75.53

0

100.00

63

124.39

126

148.32

-187

24.09

-124

50.47

-61

75.93

1

100.39

64

124.77

127

148.70

-186

24.52

-123

50.88

2

100.78

65

125.16

128

149.07

-185

24.94

-122

51.29

-60

76.33

3

101.17

66

125.54

129

149.45

-184

25.37

-121

51.70

-59

76.73

4

101.56

67

125.92

-183

25.80

-58

77.13

5

101.95

68

126.31

130

149.82

-182

26.23

-120

52.11

-57

77.52

6

102.34

69

126.69

131

150.20

-181

26.65

-119

52.52

-56

77.92

7

102.73

132

150.57

-118

52.92

-55

78.32

8

103.12

70

127.07

133

150.95

-180

27.08

-117

53.33

-54

78.72

9

103.51

71

127.45

134

151.33

-179

27.50

-116

53.74

-53

79.11

72

127.84

135

151.70

-178

27.93

-115

54.15

-52

79.51

10

103.90

73

128.22

136

152.08

-177

28.35

-114

54.56

-51

79.91

11

104.29

74

128.60

137

152.45

-176

28.78

-113

54.97

12

104.68

75

128.98

138

152.83

-175

29.20

-112

55.38

-50

80.31

13

105.07

76

129.37

139

153.20

-174

29.63

-111

55.78

-49

80.70

14

105.46

77

129.75

-173

30.05

-48

81.10

15

105.85

78

130.13

140

153.58

-172

30.47

-110

56.19

-47

81.50

16

106.24

79

130.51

141

153.95

-171

30.90

-109

56.60

-46

81.89

17

106.63

142

154.32

-108

57.00

-45

82.29

18

107.02

80

130.89

143

154.70

-170

31.32

-107

57.41

-44

82.69

19

107.40

81

131.27

144

155.07

-169

31.74

-106

57.82

-43

83.08

82

131.66

145

155.45

-168

32.16

-105

58.22

-42

83.48

20

107.79

83

132.04

146

155.82

-167

32.59

-104

58.63

-41

83.88

21

108.18

84

132.42

147

156.19

-166

33.01

-103

59.04

22

108.57

85

132.80

148

156.57

-165

33.43

-102

59.44

-40

84.27

23

108.96

86

133.18

149

156.94

-164

33.85

-101

59.85

-39

84.67

24

109.35

87

133.56

39

Appendices

CM-2201/CM-2202

©2017 Nelson Heat Tracing Systems

www.nelsonheaters.com

GA2497 Rev.5
DRAFT

Appendix E - RTD Tables

Temperature Conversion
Platinum Resistance (-200°C to 239°C)
Temperature Coefficient - 0.00385 Ohms/Ohm/OC

-163

34.27

-38

85.06

25

109.73

88

133.94

150

157.31

-162

34.69

-100

60.25

-37

85.46

26

110.12

89

134.32

151

157.69

-161

35.11

-99

60.66

-36

85.85

27

110.51

152

158.06

-98

61.06

-35

86.25

28

110.90

90

134.70

153

158.43

-160

35.53

-97

61.47

-34

86.64

29

111.28

91

135.08

154

158.81

-159

35.95

-96

61.87

-33

87.04

92

135.46

155

159.18

-158

36.37

-95

62.28

-32

87.43

30

111.67

93

135.84

156

159.55

-157

36.79

-94

62.68

-31

87.83

31

112.06

94

136.22

157

159.93

-156

37.21

-93

63.09

32

112.45

95

136.60

158

160.30

-155

37.63

-92

63.49

-30

88.22

33

112.83

96

136.98

159

160.67

-154

38.04

-91

63.90

-29

88.62

34

113.22

97

137.36

-153

38.46

-28

89.01

35

113.61

98

137.74

160

161.04

-152

38.88

90

64.30

-27

89.40

36

113.99

99

138.12

161

161.42

-151

39.30

-89

64.70

-26

89.80

37

114.38

162

161.79

-88

65.11

-25

90.19

38

114.77

100

138.50

163

162.16

-150

39.71

-87

65.51

-24

90.59

39

115.15

101

138.88

164

162.53

-149

40.13

-86

65.91

-23

90.98

102

139.26

165

162.90

-148

40.55

-85

66.31

-22

91.37

40

115.54

103

139.64

166

163.27

-147

40.96

-84

66.72

-21

91.77

41

115.93

104

140.02

167

163.65

-146

41.38

-83

67.12

42

116.31

105

140.39

168

164.02

-145

41.79

-82

67.52

-20

92.16

43

116.70

106

140.77

169

164.39

-144

42.21

-81

67.92

-19

92.55

44

117.08

107

141.15

-143

42.63

-18

92.95

45

117.47

108

141.53

170

164.76

-142

43.04

-80

68.33

-17

93.34

46

117.85

109

141.91

171

165.13

-141

43.45

-79

68.73

-16

93.73

47

118.24

172

165.50

-78

69.13

-15

94.12

48

118.62

110

142.29

173

165.87

-140

43.87

-77

69.53

-14

94.52

49

119.01

111

142.66

174

166.24

-139

44.28

-76

69.93

-13

94.91

112

143.04

175

166.61

-138

44.70

-75

70.33

-12

95.30

50

119.40

113

143.42

176

166.98

Temperature Conversion
Platinum Resistance (240°C to 629°C)
Temperature Coefficient - 0.00385 Ohms/Ohm/OC

°C

Ohms

°C

Ohms

C

Ohms

°C

Ohms

°C

Ohms

°C

Ohms

240

190.45

301

212.37

362

233.87

423

254.93

484

275.56

545

295.75

241

190.81

302

212.73

363

234.22

424

255.27

485

275.89

546

296.08

242

191.18

303

213.09

364

234.56

425

255.61

486

276.23

547

296.41

243

191.54

304

213.44

365

234.91

426

255.95

487

276.56

548

296.74

244

191.90

305

213.80

366

235.26

427

256.29

488

276.89

549

297.06

245

192.26

306

214.15

367

235.61

428

256.63

489

277.23

246

192.63

307

214.51

368

235.96

429

258.98

550

297.39

40

CM-2201/CM-2202

Appendices

©2017 Nelson Heat Tracing Systems

www.nelsonheaters.com

GA2497 Rev.5
DRAFT

Appendix E - RTD Tables

Temperature Conversion
Platinum Resistance (240°C to 629°C)
Temperature Coefficient - 0.00385 Ohms/Ohm/OC

247

192.99

308

214.86

369

236.31

490

277.56

551

297.72

248

193.35

309

215.22

430

257.32

491

277.90

552

298.04

249

193.71

370

236.65

431

257.66

492

278.23

553

298.37

310

215.57

371

237.00

432

258.00

493

278.56

554

298.70

250

194.07

311

215.93

372

237.35

433

258.34

494

278.90

555

299.02

251

194.44

312

216.28

373

237.70

434

258.68

495

279.23

556

299.35

252

194.80

313

216.64

374

238.04

435

259.02

496

279.56

557

299.68

253

195.16

314

216.99

375

238.39

436

259.36

497

279.90

558

300.00

254

195.52

315

217.35

376

238.74

437

259.70

498

280.23

559

300.33

255

195.88

316

217.70

377

239.09

438

260.04

499

280.56

256

196.24

317

218.05

378

239.43

439

260.38

560

300.65

257

196.60

318

218.41

379

239.78

500

280.90

561

300.98

258

196.96

319

218.76

440

260.72

501

281.23

562

301.31

259

197.33

380

240.13

441

261.06

502

281.56

563

301.63

320

219.12

381

240.47

442

261.40

503

281.89

564

301.96

260

197.69

321

219.47

382

240.82

443

261.74

504

282.23

565

302.28

261

198.05

322

219.82

383

241.17

444

262.08

505

282.56

566

302.61

262

198.41

323

220.18

384

241.51

445

262.42

506

282.89

567

302.93

263

198.77

324

220.53

385

241.86

446

262.76

507

283.22

568

303.26

264

199.13

325

220.88

386

242.20

447

263.10

508

283.55

569

303.58

265

199.49

326

221.24

387

242.55

448

263.43

509

283.89

266

199.85

327

221.59

388

242.90

449

236.77

570

303.91

267

200.21

328

221.94

389

243.24

510

284.22

571

304.23

268

200.57

329

222.29

450

264.11

511

284.55

572

304.56

269

200.93

390

243.59

451

264.45

512

284.88

573

304.88

330

222.65

391

243.93

452

264.79

513

285.21

574

305.20

270

201.29

331

223.00

392

244.28

453

265.13

514

285.54

575

305.53

271

201.65

332

223.35

393

244.62

454

265.46

515

285.87

576

305.85

272

202.01

333

223.70

394

244.97

455

265.80

516

286.21

577

306.18

273

202.36

334

224.06

395

245.31

456

266.14

517

286.54

578

306.50

274

202.72

335

224.41

396

245.66

457

266.48

518

286.87

579

306.82

275

203.08

336

224.76

397

246.00

458

266.82

519

287.20

276

203.44

337

225.11

398

246.35

459

267.15

580

307.15

277

203.80

338

225.46

399

246.69

520

287.53

581

307.47

278

204.16

339

225.81

460

267.49

521

287.86

582

307.79

279

204.52

400

247.04

461

267.83

522

288.19

583

308.12

41

Appendices

CM-2201/CM-2202

©2017 Nelson Heat Tracing Systems

www.nelsonheaters.com

GA2497 Rev.5
DRAFT

Appendix E - RTD Tables

Temperature Conversion
Platinum Resistance (240°C to 629°C)
Temperature Coefficient - 0.00385 Ohms/Ohm/OC

340

226.17

401

247.38

462

268.17

523

288.52

584

308.44

280

204.88

341

226.52

402

247.72

463

268.50

524

288.85

585

308.76

281

205.23

342

226.87

403

248.07

464

268.84

525

289.18

586

309.09

282

205.59

343

227.22

404

248.41

465

269.18

526

289.51

587

309.41

283

205.95

344

227.57

405

248.76

466

269.51

527

289.84

588

309.73

284

206.31

345

227.92

406

249.10

467

269.85

528

290.17

589

310.05

285

206.67

346

228.27

407

249.45

468

270.19

529

290.50

286

207.02

347

228.62

408

249.79

469

270.52

590

310.38

287

207.38

348

228.97

409

250.13

530

290.83

591

310.70

288

207.74

349

229.32

470

270.86

531

291.16

592

311.02

289

208.10

410

250.48

471

271.20

532

291.49

593

311.34

350

229.67

411

250.82

472

271.53

533

291.81

594

311.66

290

208.45

351

230.02

412

251.16

473

271.87

534

292.14

595

311.99

291

208.81

352

230.37

413

251.50

474

272.20

535

292.47

596

312.31

292

209.17

353

230.72

414

251.85

475

272.54

536

292.80

597

312.63
293

209.52

354

231.07

415

252.19

476

272.88

537

293.13

598

312.95

294

209.88

355

231.42

416

252.53

477

273.21

538

293.46

599

313.27

295

210.24

356

231.77

417

252.87

478

273.55

539

293.79

296

210.59

357

232.12

418

253.22

479

273.88

600

313.59

297

210.95

358

232.47

419

253.56

540

294.11

601

313.91

298

211.31

359

232.82

480

274.22

541

294.44

602

314.24

299

211.66

420

253.90

481

274.55

542

294.77

603

314.56

360

233.17

421

254.24

482

274.89

543

295.10

604

314.88

300

212.02

361

233.52

422

254.59

483

275.22

544

295.43

605

315.20

42

CM-2201/CM-2202

Appendices

©2017 Nelson Heat Tracing Systems

www.nelsonheaters.com

GA2497 Rev.5
DRAFT

Appendix E - RTD Tables

100W Platinum RTD Ω- 0.00385 coefficient
°F

0 1 2

3 4

Resistance in Ohms

5 6

7

8 9 10

°F

-320

20.44

20.20

19.96

19.72

19.48

19.24

19.00

18.76

18.52

-320

-310

22.83

22.59

22.35

22.11

21.87

21.63

21.39

21.16

20.92

20.68

20.44

-310

-300

25.20

24.97

24.73

24.49

24.25

24.02

23.78

23.54

23.30

23.06

22.83

-300

-290

27.57

27.33

27.10

26.86

26.62

26.39

26.15

25.91

25.68

25.44

25.20

-290

-280

29.93

29.69

29.46

29.22

28.98

28.75

28.51

28.28

28.04

27.81

27.57

-280

-270

32.27

32.04

31.80

31.57

31.34

31.10

30.87

30.63

30.40

30.16

29.93

-270

-260

34.61

34.38

34.14

33.91

33.68

33.44

33.21

32.98

32.74

32.51

32.27

-260

-250

36.94

36.71

36.47

36.24

36.01

35.78

35.54

35.31

35.08

34.84

34.61

-250

-240

39.26

39.03

38.80

38.56

38.33

38.10

37.87

37.64

37.40

37.17

36.94

-240

-230

41.57

41.34

41.11

40.88

40.65

40.42

40.19

39.95

39.72

39.49

39.26

-230

-220

43.88

43.65

43.42

43.19

42.96

42.73

42.49

42.26

42.03

41.80

41.57

-220

-210

46.17

45.94

45.71

45.48

45.26

45.03

44.80

44.57

44.34

44.11

43.88

-210

-200

48.46

48.23

48.00

47.78

47.55

47.32

47.09

46.86

46.63

46.40

46.17

-200

-190

50.74

50.52

50.29

50.06

49.83

49.60

49.38

49.15

48.92

48.69

48.46

-190

-180

53.02

52.79

52.56

52.34

52.11

51.88

51.65

51.43

51.20

50.97

50.74

-180

-170

55.29

55.06

54.83

54.61

54.38

54.15

53.93

53.70

53.47

53.25

53.02

-170

-160

57.55

57.32

57.10

56.87

56.65

56.42

56.19

55.97

55.74

55.51

55.29

-160

-150

59.81

59.58

59.35

59.13

58.90

58.68

58.45

58.23

58.00

57.78

57.55

-150

-140

62.06

61.83

61.61

61.38

61.16

60.93

60.71

60.48

60.26

60.03

59.81

-140

-130

64.30

64.08

63.85

63.63

63.40

63.18

62.95

62.73

62.50

62.28

62.06

-130

-120

66.54

66.31

66.09

65.87

65.64

65.42

65.20

64.97

64.75

64.52

64.30

-120

-110

68.77

68.55

68.33

68.10

67.88

67.66

67.43

67.21

66.99

66.76

66.54

-110

-100

71.00

70.78

70.55

70.33

70.11

69.89

69.66

69.44

69.22

68.99

68.77

-100

-90

73.22

73.00

72.78

72.56

72.33

72.11

71.89

71.67

71.45

71.22

71.00

-90

-80

75.44

75.22

75.00

74.78

74.55

74.33

74.11

73.89

73.67

73.45

73.22

-80

-70

77.66

77.43

77.21

76.99

76.77

76.55

76.33

76.11

75.88

75.66

75.44

-70

-60

79.86

79.64

79.42

79.20

78.98

78.76

78.54

78.32

78.10

77.88

77.66

-60

-50

82.07

81.85

81.63

81.41

81.19

80.97

80.75

80.53

80.31

80.09

79.86

-50

-40

84.27

84.05

83.83

83.61

83.39

83.17

82.95

82.73

82.51

82.29

82.07

-40

-30

86.47

86.25

86.03

85.81

85.59

85.37

85.15

84.93

84.71

84.49

84.27

-30

-20

88.66

88.44

88.22

88.00

87.78

87.56

87.34

87.13

86.91

86.69

86.47

-20

-10

90.85

90.63

90.41

90.19

89.97

89.75

89.54

89.32

89.10

88.88

88.66

-10

43

Appendices

CM-2201/CM-2202

©2017 Nelson Heat Tracing Systems

www.nelsonheaters.com

GA2497 Rev.5
DRAFT

Appendix E - RTD Tables

100W Platinum RTD Ω- 0.00385 coefficient
°F

0 1 2 3 4 5 6 7 8 9 10

°F

Resistance in Ohms

0

93.03

92.82

92.60

92.38

92.16

91.94

91.72

91.50

91.29

91.07

90.85

0

0

93.03

93.25

93.47

93.69

93.91

94.12

94.34

94.56

94.78

95.00

95.21

0

10

95.21

95.43

95.65

95.87

96.09

96.30

96.52

96.74

96.96

97.17

97.39

10

20

97.39

97.61

97.83

98.04

98.26

98.48

98.70

98.91

99.13

99.35

99.57

20

30

99.57

99.78

100.00

100.22

100.43

100.65

100.87

101.09

101.30

101.52

101.74

30

40

101.74

101.95

102.17

102.39

102.60

102.82

103.04

103.25

103.47

103.69

103.90

40

50

103.90

104.12

104.34

104.55

104.77

104.98

105.20

105.42

105.63

105.85

106.07

50

60

106.07

106.28

106.50

106.71

106.93

107.15

107.36

107.58

107.79

108.01

108.23

60

70

108.23

108.44

108.66

108.87

109.09

109.30

109.52

109.73

109.95

110.17

110.38

70

80

110.38

110.60

110.81

111.03

111.24

111.46

111.67

111.89

112.10

112.32

112.53

80

90

112.53

112.75

112.96

113.18

113.39

113.61

113.82

114.04

114.25

114.47

114.68

90

100

114.68

114.90

115.11

115.33

115.54

115.76

115.97

116.18

116.40

116.61

116.83

100

110

116.83

117.04

117.26

117.47

117.68

117.90

118.11

118.33

118.54

118.76

118.97

110

120

118.97

119.18

119.40

119.61

119.82

120.04

120.25

120.47

120.68

120.89

121.11

120

130

121.11

121.32

121.53

121.75

121.96

122.18

122.39

122.60

122.82

123.03

123.24

130

140

123.24

123.46

123.67

123.88

124.09

124.31

124.52

124.73

124.95

125.16

125.37

140

150

125.37

125.59

125.80

126.22

126.44

126.65

126.86

127.08

127.29

127.50

150

160

127.50

127.71

127.93

128.35

128.56

128.78

128.99

129.20

129.41

129.62

160

170

129.62

129.84

130.05

130.47

130.68

130.90

131.11

131.32

131.53

131.74

170

180

131.74

131.96

132.17

132.59

132.80

133.01

133.23

133.44

133.65

133.86

180

190

133.86

134.07

134.28

134.71

134.92

135.13

135.34

135.55

135.76

135.97

190

200

135.97

136.19

136.40

136.82

137.03

137.24

137.45

137.66

137.87

138.08

200

210

138.08

138.29

138.51

138.93

139.14

139.35

139.56

139.77

139.98

140.19

210

220

140.19

140.40

140.61

141.03

141.24

141.45

141.66

141.87

142.08

142.29

220

230

142.29

142.50

142.71

143.13

143.34

143.55

143.76

143.97

144.18

144.39

230

240

144.39

144.60

144.81

145.23

145.44

145.65

145.86

146.07

146.28

146.49

240

250

146.49

146.70

146.91

147.32

147.53

147.74

147.95

148.16

148.37

148.58

250

260

148.58

148.79

149.00

149.41

149.62

149.83

150.04

150.25

150.46

150.67

260

270

150.67

150.88

151.08

151.50

151.71

151.92

152.13

152.33

152.54

152.75

270

280

152.75

152.96

153.17

153.58

153.79

154.00

154.21

154.42

154.62

154.83

280

290

154.83

155.04

155.25

155.66

155.87

156.08

156.29

156.49

156.70

156.91

290

300

156.91

157.12

157.33

157.74

157.95

158.15

158.36

158.57

158.78

158.98

300

310

158.98

159.19

159.40

159.81

160.02

160.23

160.43

160.64

160.85

161.05

310

320

161.05

161.26

161.47

161.88

162.09

162.29

162.50

162.71

162.91

163.12

320

44

CM-2201/CM-2202

Appendices

©2017 Nelson Heat Tracing Systems

www.nelsonheaters.com

GA2497 Rev.5
DRAFT

Appendix E - RTD Tables

100W Platinum RTD Ω- 0.00385 coefficient
°F

0 1 2 3 4 5 6 7 8 9 10

°F

Resistance in Ohms

330

163.12

163.33

163.53

163.74

163.95

164.15

164.36

164.57

164.77

164.98

165.18

330

340

165.18

165.39

165.60

165.80

166.01

166.21

166.42

166.63

166.83

167.04

167.24

340

350

167.24

167.45

167.66

167.86

168.07

168.27

168.48

168.68

168.89

169.09

169.30

350

360

169.30

169.51

169.71

169.92

170.12

170.33

170.53

170.74

170.94

171.15

171.35

360

370

171.35

171.56

171.76

171.97

172.17

172.38

172.58

172.79

172.99

173.20

173.40

370

380

173.40

173.61

173.81

174.02

174.22

174.43

174.63

174.83

175.04

175.24

175.45

380

390

175.45

175.65

175.86

176.06

176.26

176.47

176.67

176.88

177.08

177.29

177.49

390

400

177.49

177.69

177.90

178.10

178.30

178.51

178.71

178.92

179.12

179.32

179.53

400

410

179.53

179.73

179.93

180.14

180.34

180.55

180.75

180.95

181.16

181.36

181.56

410

420

181.56

181.77

181.97

182.17

182.38

182.58

182.78

182.98

183.19

183.39

183.59

420

430

183.59

183.80

184.00

184.20

184.40

184.61

184.81

185.01

185.22

185.42

185.62

430

440

185.62

185.82

186.03

186.23

186.43

186.63

186.84

187.04

187.24

187.44

187.65

440

450

187.65

187.85

188.05

188.25

188.45

188.66

188.86

189.06

189.26

189.46

189.67

450

460

189.67

189.87

190.07

190.27

190.47

190.67

190.88

191.08

191.28

191.48

191.68

460

470

191.68

191.88

192.09

192.29

192.49

192.69

192.89

193.09

193.29

193.49

193.70

470

480

193.70

193.90

194.10

194.30

194.50

194.70

194.90

195.10

195.30

195.50

195.71

480

490

195.71

195.91

196.11

196.31

196.51

196.71

196.91

197.11

197.31

197.51

197.71

490

500

197.71

197.91

198.11

198.31

198.51

198.71

198.91

199.11

199.31

199.51

199.71

500

510

199.71

199.91

200.11

200.31

200.51

200.71

200.91

201.11

201.31

201.51

201.71

510

520

201.71

201.91

202.11

202.31

202.51

202.71

202.91

203.11

203.31

203.51

203.71

520

530

203.71

203.91

204.11

204.31

204.51

204.71

204.90

205.10

205.30

205.50

205.70

530

540

205.70

205.90

206.10

206.30

206.50

206.70

206.89

207.09

207.29

207.49

207.69

540

550

207.69

207.89

208.09

208.29

208.48

208.68

208.88

209.08

209.28

209.48

209.67

550

560

209.67

209.87

210.07

210.27

210.47

210.67

210.86

211.06

211.26

211.46

211.66

560

570

211.66

211.85

212.05

212.25

212.45

212.64

212.84

213.04

213.24

213.44

213.63

570

580

213.63

213.83

214.03

214.23

214.42

214.62

214.82

215.02

215.21

215.41

215.61

580

590

215.61

215.80

216.00

216.20

216.40

216.59

216.79

216.99

217.18

217.38

217.58

590

600

217.58

217.77

217.97

218.17

218.37

218.56

218.76

218.96

219.15

219.35

219.55

600

610

219.55

219.74

219.94

220.13

220.33

220.53

220.72

220.92

221.12

221.31

221.51

610

620

221.51

221.70

221.90

222.10

222.29

222.49

222.68

222.88

223.08

223.27

223.47

620

630

223.47

223.66

223.86

224.06

224.25

224.45

224.64

224.84

225.03

225.23

225.42

630

640

225.42

225.62

225.82

226.01

226.21

226.40

226.60

226.79

226.99

227.18

227.38

640
650

227.38

227.57

227.77

227.96

228.16

228.35

228.55

228.74

228.94

229.13

229.33

650

660

229.33

229.52

229.72

229.91

230.11

230.30

230.49

230.69

230.88

231.08

231.27

660

45

Appendices

CM-2201/CM-2202

©2017 Nelson Heat Tracing Systems

www.nelsonheaters.com

GA2497 Rev.5
DRAFT

Appendix E - RTD Tables

100W Platinum RTD Ω- 0.00385 coefficient
°F

0 1 2

3 4

Resistance in Ohms

5 6

7

8 9 10

°F

670

231.27

231.47

231.66

231.86

232.05

232.24

232.44

232.63

232.83

233.02

233.21

670

680

233.21

233.41

233.60

233.80

233.99

234.18

234.38

234.57

234.77

234.96

235.15

680

690

235.15

235.35

235.54

235.73

235.93

236.12

236.31

236.51

236.70

236.89

237.09

690

700

237.09

237.28

237.47

237.67

237.86

238.05

238.25

238.44

238.63

238.83

239.02

700

710

239.02

239.21

239.41

239.60

239.79

239.98

240.18

240.37

240.56

240.75

240.95

710

720

240.95

241.14

241.33

241.52

241.72

241.91

242.10

242.29

242.49

242.68

242.87

720

730

242.87

243.06

243.26

243.45

243.64

243.83

244.02

244.22

244.41

244.60

244.79

730

740

244.79

244.98

245.18

245.37

245.56

245.75

245.94

246.13

246.33

246.52

246.71

740

750

246.71

246.90

247.09

247.28

247.47

247.67

247.86

248.05

248.24

248.43

248.62

750

760

248.62

248.81

249.00

249.20

249.39

249.58

249.77

249.96

250.15

250.34

250.53

760

770

250.53

250.72

250.91

251.10

251.30

251.49

251.68

251.87

252.06

252.25

252.44

770

780

252.44

252.63

252.82

253.01

253.20

253.39

253.58

253.77

253.96

254.15

254.34

780

790

254.34

254.53

254.72

254.91

255.10

255.29

255.48

255.67

255.86

256.05

256.24

790

800

256.24

256.43

256.62

256.81

257.00

257.19

257.38

257.57

257.76

257.95

258.14

800

810

258.14

258.33

258.52

258.70

258.89

259.08

259.27

259.46

259.65

259.84

260.03

810

820

260.03

260.22

260.41

260.60

260.78

260.97

261.16

261.35

261.54

261.73

261.92

820

830

261.92

262.11

262.29

262.48

262.67

262.86

263.05

263.24

263.43

263.61

263.80

830

840

263.80

263.99

264.18

264.37

264.56

264.74

264.93

265.12

265.31

265.50

265.68

840

850

265.68

265.87

266.06

266.25

266.44

266.62

266.81

267.00

267.19

267.37

267.56

850

860

267.56

267.75

267.94

268.12

268.31

268.50

268.69

268.87

269.06

269.25

269.44

860

870

269.44

269.62

269.81

270.00

270.18

270.37

270.56

270.75

270.93

271.12

271.31

870

880

271.31

271.49

271.68

271.87

272.05

272.24

272.43

272.61

272.80

272.99

273.17

880

890

273.17

273.36

273.55

273.73

273.92

274.11

274.29

274.48

274.67

274.85

275.04

890

900

275.04

275.22

275.41

275.60

275.78

275.97

276.15

276.34

276.53

276.71

276.90

900

910

276.90

277.08

277.27

277.46

277.64

277.83

278.01

278.20

278.38

278.57

278.75

910

920

278.75

278.94

279.13

279.31

279.50

279.68

279.87

280.05

280.24

280.42

280.61

920

930

280.61

280.79

280.98

281.16

281.35

281.53

281.72

281.90

282.09

282.27

282.46

930

940

282.46

282.64

282.83

283.01

283.20

283.38

283.56

283.75

283.93

284.12

284.30

940

950

284.30

284.49

284.67

284.86

285.04

285.22

285.41

285.59

285.78

285.96

286.14

950

960

286.14

286.33

286.51

286.70

286.88

287.06

287.25

287.43

287.62

287.80

287.98

960

970

287.98

288.17

288.35

288.53

288.72

288.90

289.08

289.27

289.45

289.64

289.82

970

980

289.82

290.00

290.19

290.37

290.55

290.73

290.92

291.10

291.28

291.47

291.65

980

990

291.65

291.83

292.02

292.20

292.38

292.56

292.75

292.93

293.11

293.30

293.48

990

46

CM-2201/CM-2202

Appendices

©2017 Nelson Heat Tracing Systems

www.nelsonheaters.com

GA2497 Rev.5
DRAFT

Appendix E - RTD Tables

100W Platinum RTD Ω- 0.00385 coefficient
°F

0 1 2

3 4

Resistance in Ohms

5 6

7

8 9 10

°F

1000

293.48

293.66

293.84

294.03

294.21

294.39

294.57

294.76

294.94

295.12

295.30

1000

1010

295.30

295.48

295.67

295.85

296.03

296.21

296.40

296.58

296.76

296.94

297.12

1010

1020

297.12

297.31

297.49

297.67

297.85

298.03

298.21

298.40

298.58

298.76

298.94

1020

1030

298.94

299.12

299.30

299.49

299.67

299.85

300.03

300.21

300.39

300.57

300.75

1030

1040

300.75

300.94

301.12

301.30

301.48

301.66

301.84

302.02

302.20

302.38

302.56

1040

1050

302.56

302.75

302.93

303.11

303.29

303.47

303.65

303.83

304.01

304.19

304.37

1050

1060

304.37

304.55

304.73

304.91

305.09

305.27

305.45

305.63

305.81

305.99

306.17

1060

1070

306.17

306.35

306.53

306.71

306.89

307.07

307.25

307.43

307.61

307.79

307.97

1070

1080

307.97

308.15

308.33

308.51

308.69

308.87

309.05

309.23

309.41

309.59

309.77

1080

1090

309.77

309.95

310.13

310.31

310.49

310.67

310.85

311.02

311.20

311.38

311.56

1090

1100

311.56

311.74

311.92

312.10

312.28

312.46

312.64

312.81

312.99

313.17

313.35

1100

1110

313.35

313.53

313.71

313.89

314.07

314.24

314.42

314.60

314.78

314.96

315.14

1110

1120

315.14

315.31

315.49

315.67

315.85

316.03

316.21

316.38

316.56

316.74

316.92

1120

1130

316.92

317.10

317.27

317.45

317.63

317.81

317.98

318.16

318.34

318.52

318.70

1130

1140

318.70

318.87

319.05

319.23

319.41

319.58

319.76

319.94

320.12

320.29

320.47

1140

1150

320.47

320.65

320.82

321.00

321.18

321.36

321.53

321.71

321.89

322.06

322.24

1150

1160

322.24

322.42

322.59

322.77

322.95

323.13

323.30

323.48

323.66

323.83

324.01

1160

1170

324.01

324.18

324.36

324.54

324.71

324.89

325.07

325.24

325.42

325.60

325.77

1170

1180

325.77

325.95

326.12

326.30

326.48

326.65

326.83

327.00

327.18

327.36

327.53

1180

1190

327.53

327.71

327.88

328.06

328.24

328.41

328.59

328.76

328.94

329.11

329.29

1190

1200

329.29

329.46

329.64

329.82

329.99

330.17

330.34

330.52

330.69

330.87

331.04

1200

1210

331.04

331.22

331.39

331.57

331.74

331.92

332.09

332.27

332.44

332.62

332.79

1210

1220

332.79

1220

47

Appendices

CM-2201/CM-2202

Appendix F - Warranty

Nelson Heat Trace Products
LIMITED WARRANTY AND LIABILITY

other conditions differ from those represented by you, any warranties
or other provisions contained herein which are affected by such
conditions

shall be null and void.

AppletonGrp LLC - d/b/a Appleton Group warrants that if there are any
defects in material or workmanship in any heating cable or accessory
during the first year after the date of purchase, we will provide new
products to replace any defective items, or we will refund the
purchase
other
cable or accessory at our factory with all shipping and other removal costs
borne

We further warrant that, for a period of twelve (12) months after the
date of performance, any services performed here under will be in a
and skillful manner, based on our understanding of pertinent technical
data as of the date of performance of such services. Appleton Group’s
sole responsibility and liability in the event of any defect, error,
omission, or failure in the services rendered here under shall be to
provide corrected services of the type provided for herein, designed to
correct such defect, error, omissions, or failure, and in no event shall
Appleton Group’s liability with respect to such warranty exceed the
amount received by it from the Buyer on account of such services.

Our obligation to provide corrected services, new products, refund the
purchase price, or perform the repair described above is conditioned
(a) the installation of the accessory or cable conforming to the directions
set forth in our installation instructions and (b) the accessory or cable
not having been damaged by mechanical or electrical activities
unrelated to the operation of the accessory or cable.

A refund of your purchase price, provision of replacement products,
repair of the accessory or cable or provision of corrected services as
described above, shall be your sole and exclusive remedy for a breach of
this warranty. THESE ARE THE SOLE AND EXCLUSIVE WARRANTIES GIVEN
BY APPLETON GROUP WITH RESPECT TO THE GOODS AND SERVICES AND
ARE IN LIEU OF AND EXCLUDE ALL OTHER WARRANTIES, EXPRESS OR
IMPLIED, ARISING BY OPERATION OF LAW OR OTHERWISE,
WITHOUT LIMITATION, MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE WHETHER OR NOT THE PURPOSE OR USE HAS
BEEN DISCLOSED TO NELSON IN SPECIFICATIONS, DRAWINGS OR
OTHERWISE, AND WHETHER OR NOT APPLETON GROUP’S PRODUCTS ARE
SPECIFICALLY DESIGNED AND/OR MANUFACTURED BY NELSON FOR YOUR
USE OR PURPOSE.

This warranty does not extend to any losses or damages due to
misuse, accident, abuse, neglect, normal wear and tear, negligence,
unauthorized modification or alteration, use beyond rated capacity,
or improper installation, maintenance or application. To the extent that
you or your agents have supplied specifications, information,

representation of operating conditions
in the selection or design of the Goods and the preparation of Appleton

Group’s quotation, and in the event that actual operating conditions or

price paid for the accessory or cable, not including any labor or

installation costs. As an alternate, we may elect to repair the

by the purchaser.

INCLUDING

or other data to Appleton Group

good

upon

If within thirty (30) days after your discovery of any warranty defects
within the warranty period, you notify Appleton Group thereof in writing.
Appleton Group shall, at its option, repair, correct or replace F.O.B.
point

of manufacture, or refund the purchase price for, that portion of the
Goods found by Appleton Group to be defective. Failure by you to give
such written notice within the applicable time period shall be deemed an
absolute and unconditional waiver of your claim for such defects. Goods
repaired or replaced during the warranty period shall be covered by the
foregoing warranty for the remainder of the original warranty period
or ninety (90) days from the date of shipment of the repaired or replaced

goods, whichever is longer.

This limited warranty does not cover any costs relating to the repair
or replacement of any accessory or cable at the installation site. Our
accessories and cables are not easily accessible. A failed accessory
or cable usually cannot be easily repaired. Replacement of a failed
accessory or cable will require that the materials under which it is
installed be removed to permit replacement of the accessory or
cable. We will not reimburse any costs relating to the repair or
replacement of any accessory or cable at the installation site.

IN NO EVENT, REGARDLESS OF THE FORM OF THE CLAIM OR CAUSE OF
ACTION (WHETHER BASED IN CONTRACT, INFRINGEMENT,
NEGLIGENCE,
APPLETON
EXCEED THE PRICE PAID BY YOU FOR THE SPECIFIC GOODS PROVIDED
BY APPLETON GROUP GIVING RISE TO THE CLAIM OR CAUSE OF
ACTION. YOU AGREE THAT WE SHALL NOT BE LIABLE TO YOU OR YOUR
CUSTOMERS FOR ANY INCIDENTAL, SPECIAL OR CONSEQUENTIAL OR
PUNITIVE DAMAGES. No agent, employee or representative of ours has
authority to bind us to

concerning the goods sold

warranty is specifically

To obtain new products, arrange repair of existing product, or a
refund under this warranty, please contact Appleton Group
(800-621-1506) with a description of the defect and proof of purchase
at the address

AppletonGrp LLC-d/b/aAppletonGroup
9377 W.Higgins Rd.
Rosemont, IL 60018

STRICTLIABILITY, OTHER OR OTHERWISE), SHALL

GROUP’S LIABILITY TO YOU AND/OR YOUR CUSTOMERS

any affirmation, representation of warranty

unless such affirmation, representation or

incorporated by written agreement.

noted herein.

Appleton Grp LLC d/b/a Appleton Group. The Appleton, O-Z/Gedney, SolaHD, EasyHeat, Nelson and Emerson logos are registered in the U.S. Patent and Trademark
Office. EasyHeat, Inc. is a wholly owned subsidiary of Appleton Grp LLC. All other product or service names are the property of their registered owners.
© 2017, Appleton Grp LLC. All rights reserved.

48