Process Technology T-DE20 Instruction Manual
Specifications .................................................................. 1
DE20 / T-DE20 Instruction Manual
TABLE OF CONTEN
TS
DE20 / T-DE20 Digital Temperature
General Description ............................................................................ 2
Installation Procedure ......................................................................... 2
Overtemperature Protection .............................................................. 3
Set Point & Features ........................................................................... 4
Alarm Feature ...................................................................................... 4
Error Conditions ................................................................................... 4
Error Messages ................................................................................... 4
Power and Relay Wiring .................................................................... 5
Calibration ............................................................................................. 6
2 Wire RTD Sensor Calibration ........................................................ 6
Resistance Signal Calibration ........................................................... 7
3 Wire RTD Calibration ...................................................................... 7
Thermocouple Calibration ................................................................. 8
Voltage Signal Calibration .................................................................. 8
Current Input Calibration ................................................................. 10
Frequency Signal Calibration ......................................................... 10
Configuration (Setup) ....................................................................... 11
Main Menu Summary...................................................................... 11
Sensor Type (U1) ............................................................................. 12
Signal Offset (U2) ............................................................................. 12
Signal Filter Setting (U4) .................................................................. 12
Set Point Dead Band (U5) .............................................................. 13
Display Stabilizer (U8) ...................................................................... 13
Set Point Limit (L) .............................................................................. 13
Heating or Cooling Switch (F2) ...................................................... 13
Alarm On/Off Switch (F3) ................................................................ 14
Unit Display Enable (F4) ................................................................. 14
Temperature Units Conversion (F5) ............................................. 14
Sensor DIP Switch Settings ........................................................... 14
Electrical Noise and Interference ................................................... 15
Illustration of a Typical Heater
Installation in a Process Tank ......................................................... 15
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DE20 Specifications
Standard Input
2 wire1000 ohm RTD TCR (alpha),
0.00385 ohm/ohm/°C
RTD Self Heating Coefficient:
5° C/w in 0.2 m/s water; 200° C/w in
1 m/s air measurement current, 0.1 to 0.2 mA
Input Range
-40°F (-40°C) to 1000°F (538°C)
°F or °C field selectable
Set Point Range
Selectable throughout the input range
Sensor Break or
Short Protection
De-energize control output (No sensor short
protection with Thermocouple sensor)
Accuracy
± 0.25% span, ± 1 digit
Enclosure
Type 12, IP54
Face suitable for panel mounting
(#20 ga. through 1/4 thick panels)
Display
4 digit, (1/2" nominal), LED display screen
Control Function
ON/OFF Electromechanical Relays
Control Outputs
SP1 Set Point
(reverse acting) SPDT 20A resistive@240 VAC max
1HP@240 VAC max, 1/2 HP@120VAC
ON/OFF Differential
Field adjustable
1° (F or C) to 99°
Memory
Nonvolatile
Supply Voltage
Operating Conditions
• Indoor Use Only
• 20°F (-7°C) to 130°F (54°C)
• Max Altitude: 3000m
• Max Relative Humidity: 80%
• Pollution Degree 2
• Installation Category II
Input Options
RTD 2 & 3-wire 100 ohm 0.00385 ohm/ohm/ºC or
0.00392 ohm/ohm/ºC
Thermocouples - (types J, K, T, R)
NIST Monograph 175, revision ITS-90 (Obsolete)
Current 4-20mA DC
Voltage (1-10 VDC)
Frequency (0-200 Hz, counts/second),
+/- 6 VDC p to p (up to 30VDC peak with Sw2 ON)
100V to 240V +/- 10% VAC, 50-60 Hz, 13VA
M-33-01-05-3/19/18 1 DE20/T-DE20 Manual
Equipment protected throughout by Double Insulation or Reinforced Insulation.
General Descriptio
Avoid damaging circuitry. Remove rear cover before removing knockouts with a hammer/punch.
Évitez d'endommager les composants du DE20. Enlevez
le panneau arrière avant d'enlever le plastique pour
faire des trous avec un marteau ou un poinçon.
Retaining collar
Retaining
collar screws
The DE20 digital temperature control is a microprocessor based device that operates one relay. The
relay’s contact state is indicated as SET POINT on the
front panel.
The temperature sensor (i.e. RTD or thermocouple)
sends a signal to the DE20 controller. The DE20 compares this signal to a value, determined by the operator
and set in the control’s memory for the SET POINT. In
the heating mode if the sensor signal is lower than the
set point value, the DE20 energizes the relay and its
isolated contacts close.
The DE20 is also equipped with an “ALARM
CONDITION” feature. This feature is activated by
using the “F3” parameter (described on page 13). The
DE20 enters an “ALARM CONDITION” any time the
sensor signal has exceeded the ALARM SET POINT.
Under this condition, the DE20 de-energizes the relay
and the letters “AAA” flash on the
LED display.
n
Installation Procedure
Suitable for indoor use only.
Unpack and inspect the controller for damage upon
receipt. Any shipping damage claims must be made
through the freight carrier that delivered the controller.
Remove the rear cover and inspect the controller for
internal damage.
Remove the
panel retaining
collar by inserting a flat head
screwdriver
under the collar
on alternating
sides while sliding the collar back.
Cut a 1/8 DIN finished opening: 1.750" x 3.625" (44
mm x 92 mm) in the panel where the DE20 is to be
mounted.
.
Remove the rear
cover. Select
from the four (4)
knockouts on
the rear cover
that which offers
the most convenient routing
for external wiring. Remove the knockouts before reattaching the
rear cover or inserting the control in the panel.
M-33-01-05- 3/19/18
Insert the DE20
through the prepared opening
and slide the
retaining collar
over the case
from the rear of
the panel. After
hand tightening
the collar, tighten
the two (2) collar
screws to ensure a secure
fit.
Install a suitable liquid tight conduit fitting through the
knockout opening following manufacturer’s instructions and install field wiring. Using the wiring diagram
2 DE20/T-DE20 Manual
supplied with the controller, install the required input
Overtemperature protection is necessary in
any system where a fault condition could produce a fire or any other hazardous condition.
Operation without thorough safety precautions
can result in equipment failure, property damage and personal injury.
La protection de surchauffe est nécessaire
dans n'importe quel système où une condition
fausse avec résultat d'une temperature haute
pourrait produire une incendie ou autre condition dangereuse. L'opération sans les précautions complètes de sécurité pourrait mener à la
défaillance de l'equipement, l'endommagement
de la propriété, ou des blessures.
and output wires. Use National Electric Code and
local codes for determining wire sizing, insulation,
terminations, etc.
The factory supplied 1000 ohm RTD sensor can be
extended using standard electrical hookup wire (22
awg or larger). The effect of additional 22 awg sensor
wire length on control calibration is approximately 1ºF
for every 65 feet.
Note:
This does not apply to
MUST use specific
ing the sensor wire length. Use of incorrect extension wire can cause hazardous operating
thermocouple wire when
THERMOCOUPLES.
extend-
conditions.
You
Overtemperature Protection
Component failure (sensors, relays, temperature controller, etc.) in a temperature controlled process can
result in damage to the product, heater over temperature, and the possibility of a fire.
To safeguard against these events, install over temperature protection. This will interrupt the heater power
supply in the event of low solution level.
Process Technology heaters include a thermal device
(Protector 1, 2, or 3) on the heater to monitor the heater’s surface temperature. When wired properly, these
devices cut the power to the heater in low solution level
conditions. In addition to thermal protection, Process
Technology requires the use of liquid level controls to
monitor the solution level and shut off the heaters prior
to an overtemperature condition occurring.
Ensure you read and adhere to all Over-temperature
protector installation instructions and warnings.
Overtemperature Protection Device with Low Level
Cutoff Sample Wiring Diagram
(your wiring may differ)
M-33-01-05 - 3/19/18
3 DE20/T-DE20 Manual
Set Point and Features
Control Set Point
The set point value will be displayed whenever the
“SET” key is pressed. This value can be changed by
the following procedure:
Note: The units displayed, ºC, ºF, Hz, volts, mA or
ohms are established during the setup of the controller. See F2
set point relay from reverse to direct acting.
Press both the “SET” key and the decrease “” keys
simultaneously and hold for 3 seconds. When released the set point value and a decimal point will
appear, release both keys. Wait approximately one
second, then using the decrease “” key or increase
“” key, adjust the display to your new value. Depress the “SET” key to enter your new value.
Note: If the “SET” key is not pressed within 5 sec-
onds, the new
will revert to its previous setting.
The controller will automatically return to the operating mode and display the current temperature.
instructions
value
will be lo
on page 12 for changing
st and the set
poin
t value
Alarm Feature
Note: This is not a safety device.
The Alarm feature, which is enabled using the “F3”
set-ting during setup (see page 13), allows the
user to establish a set point above which the control
will enter into an alarm condition. This set point
should be higher than the set point setting on the
control. During the alarm condition the control relay
will de-energize the set point relay and flash “AAA”
on the display.
After enabling this feature, you may view and adjust
the “ALARM SET POINT” on the display. The alarm
set point value will be displayed and can be adjusted
by pressing the “SET” key and the increase “” key
simultaneously and holding them for approximately
three seconds. The alarm set point value will appear
as a flashing display.
Note: If the “SET” key is not pressed within 5
sec-
onds, the new
value will revert to its previous setting.
To change the “ALARM
increase “” or decrease “” keys while the display
is flashing. Press the “SET” key to enter your new
value. If you wish to accept the current value, press
the “SET” key.
value
will be lo
SET POINT”,
st and the set
press the
poin
t
Error C
Sensor values that are out of range will generate an
error display. For Celsius: <-40ºC or >+538ºC. For
Fahrenheit: <-40ºF or >+1000ºF.
In the event of an improperly connected RTD sensor
or thermocouple, or if the control reads an “open”
circuit, the message “HHH” is displayed and the control de-energizes the control relay. In the event the
RTD sensor “shorts”, the message “UUU” is displayed
and the control de-energizes the control relay.
Note:
Thermocouple “shorts”
measurement point to be created. This will lead to
false
readings
and
ondition
dangerous operating
s
cause a
new
junction/
conditions.
Error Messages
If the calibration and setup information stored within
the memory becomes corrupt or erased, the control
will switch to its default calibration/configuration settings. The display will flash the letter “c” on the left
side when default values are activated. The physical
size and position of the letter “c” will define the exact
nature of the problem.
Note: Shorted thermocouples will not result in an
error condition. Instead, incorrect readings will be
displayed.
A small “c” in the upper left-hand corner indicates the
control is relying on default (factory set) calibration
values. This happens when the control is new and
has not yet been calibrated (setup).
A small “c” in the lower left-hand corner indicates the
control is relying on default configuration values. This
is a rare condition, but may occur if the control has been
calibrated for use with a two-wire RTD sensor but the
configuration parameters have not been changed from
their default values. Changing any of the configuration
or set point variables will turn off this indication.
A large “C” on the left side of the display indicates the
control is using the default values for the configuration
and the calibration. This can occur in a new control
that has never been calibrated or configured, or in a
control wherein the memory has been erased.
The controller will automatically return to the operating mode and display the current temperature.
M-33-01-05 - 3/19/18
4 DE20/T-DE20 Manual
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