Process Technology T-DE20 User manual

Specifications ..................................................................1
GeneralDescription............................................................................2
InstallationProcedure.........................................................................2
OvertemperatureProtection..............................................................3
SetPoint&Features...........................................................................4
AlarmFeature......................................................................................4
ErrorConditions...................................................................................4
ErrorMessages...................................................................................4
PowerandRelayWiring....................................................................5
Calibration.............................................................................................6
2WireRTDSensorCalibration........................................................6
ResistanceSignalCalibration...........................................................7
3WireRTDCalibration......................................................................7
ThermocoupleCalibration.................................................................8
VoltageSignalCalibration..................................................................8
CurrentInputCalibration.................................................................10
FrequencySignalCalibration......................................................... 10
Configuration(Setup)....................................................................... 11
MainMenuSummary...................................................................... 11
SensorType(U1)............................................................................. 12
SignalOffset(U2)............................................................................. 12
SignalFilterSetting(U4).................................................................. 12
SetPointDeadBand(U5).............................................................. 13
DisplayStabilizer(U8)...................................................................... 13
SetPointLimit(L).............................................................................. 13
HeatingorCoolingSwitch(F2)...................................................... 13
AlarmOn/OffSwitch(F3)................................................................ 14
UnitDisplayEnable(F4).................................................................14
TemperatureUnitsConversion(F5)............................................. 14
SensorDIPSwitchSettings........................................................... 14
ElectricalNoiseandInterference................................................... 15
IllustrationofaTypicalHeater
InstallationinaProcessTank......................................................... 15
7010 Lindsay Drive •Mentor, Ohio 44060 •Phone: [phone]
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COPYRIGHT 2016 Process Technology
DE20 / T-DE20 Instruction Manual
TABLE OF C O N T EN TS
DE20 / T-DE20 Digital Temperature
Control

M-33-01-05-3/19/18 1 DE20/T-DE20 Manual
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
100V to 240V +/- 10% VAC, 50-60 Hz, 13VA
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)
Equipment protected throughout byDouble Insulationor Reinforced Insulation.

2 DE20/T-DE20 Manual
General Descriptio n
The DE20 digital temperature control is a micropro-
cessor 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 com-
pares 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.
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 rear
cover. Select
from the four (4)
knockouts on
the rear cover
that which offers
the most con-
venient routing
for external wir-
ing. Remove the knockouts before reattaching the
rear cover or inserting the control in the panel.
M-33-01-05- 3/19/18
Remove the
panel retaining
collar by insert-
ing 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.
Avoid damaging circuitry. Remove rear cover be-
fore 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.
Insert the DE20
through the pre-
pared 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 en-
sure a secure
fit.
Install a suitable liquid tight conduit fitting through the
knockout opening following manufacturer’s instruc-
tions and install field wiring. Using the wiring diagram
Retaining collar
Retaining
collar screws

3 DE20/T-DE20 Manual
supplied with the controller, install the required input
andoutputwires.UseNationalElectric Codeand
local codes fordetermining 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: Thisdoesnotapply to THERMOCOUPLES. You
MUSTusespecific thermocouple wire when extend-
ing the sensor wire length. Use of incorrect exten-
sionwire cancausehazardous operating conditions.
Overtemperature Protection
Component failure (sensors, relays, temperature con-
troller, etc.) in a temperature controlled process can
result in damage to the product, heater over tempera-
ture, and the possibility of a fire.
Tosafeguard against these events, installover tem-
perature 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 heat-
er’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.
M-33-01-05 - 3/19/18
Overtemperature protection is necessary in
any system where a fault condition could pro-
duce a fire or any other hazardous condition.
Operation without thorough safety precautions
can result in equipment failure, property dam-
age 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 condi-
tion dangereuse. L'opération sans les précau-
tions complètes de sécurité pourrait mener à la
défaillance de l'equipement, l'endommagement
de la propriété, ou des blessures.
Overtemperature Protection Device with Low Level
Cutoff Sample Wiring Diagram
(your wiring may differ)

4 DE20/T-DE20 Manual
Set Point and Features
ControlSetPoint
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 con-
troller. SeeF2 instructions onpage12forchanging
set point relay from reverse to direct acting.
Press both the “SET” key and the decrease “”keys
simultaneously and hold for 3 seconds. When re-
leased 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. De-
press the “SET” key to enter your new value.
Note: If the “SET” key is not pressed within 5 sec-
ond s , t h e n e w va lu e will b e lo sta nd t h eset poin tvalue
will revert to its previoussetting.
The controller will automatically return to the operat-
ing mode and display the current temperature.
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- ond s , t h e n e w va lu e will b e lo sta nd t h eset poin t
value will revert to its previoussetting.
To change the “ALARM SET POINT”, press the
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.
The controller will automatically return to the operat-
ing mode and display the current temperature.
M-33-01-05 - 3/19/18
Error C ondi t ion s
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 con-
trol 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” causea new junction/
measurement point to be created. This will lead to
false readings and dangerous operating 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 set-
tings. 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.

M-33-01-05 3/19/18 5 DE20/T-DE20 Manual
Power, Heating and Cooling Relay Wiring (rear view ofcontroller)
Power and Relay: Wiring Procedure
Unit is intended for a single power
source. To complete the wiring procedure,
you will need these tools and materials:
1. #2 Phillips head screwdriver.
2. 1/8” (x-small) straight blade screwdriv-
er.
3. Power supply wire, 18 awg minimum.
4. Relay connection wires (see state and
local electrical requirements for proper
65ºC wire gauge).
Referring to the “Power, Heating and Cool-
ing Relay Wiring (rear view of controller)”
illustration above, locate and identify termi-
nal locations for the power supply voltage,
the set point relay, and the appropriate
sensor. Connect wires into their designated
terminals and tighten the retaining screw
which will secure the wire into place.
HOT NEUTRAL
POWER SUPPLY
85-265 VAC
50-60 hZ, 13VA
H EATE R , CONTACTOR or
SOLENOID
20 AMPS @ 240 VAC
1 HP @ 240 VAC

6 DE20/T-DE20 Manual
Calibration
This section includes calibration procedures for 2 & 3
wire RTDs, Resistance, Voltage, Current Input, Fre-
quency, and Thermocouples.
2 Wire RTD Sensor Calibration
The 2 wire, 1000 ohm RTD sensor must be connected
across terminals #1 AND #2 of the terminal block.
Calibration Procedure for the 2 Wire RTD:
RTD devices are precision resistors whose resistance
value varies with temperature. The DE20 control
measures the RTD resistance and compares that
measurement with a “standard” set of values stored in
the control memory. To restore, update or verify that
this “standard” set of values is correct, do the follow-
ing:
Equipment needed:
1. Two precision resistors (tolerance +/0.1% or bet-
ter) with a fixed value equal to the nominal value
of the RTD (i.e. 1000 ohms).
2. A suitable jumper cable to facilitate changing in-
put resistance.
Calibration procedures require the removal of
the rear cover of the control. It also requires that
power is ON, exposing the technician to poten-
tially lethal voltages. Exercise EXTREME CARE
and wear tested electrician’s gloves whenever
power is on.
Les procédures de calibration nécessitent
l'enlèvement du panneau arrière du contrôle.
Ça exige aussi que le courant électrique est
allumé ce qui expose le technicien à des ten-
sions potentiellement létales. Utilisez toujours
un soin extrême et portez des gants certifiés
d'électricien quand le courrant est allumé.
Step 1: Turn OFF all power.
Step 2: Remove rear cover.
Step 3: Remove RTD sensor.
Step 4: Install the precision resistors in place of the
RTD sensor, as shown.
M-33-01-05 3/19/18
Step 5: Install the jumper cable between the loose
end of one of the resistors and the fixed end of the
other resistor to establish an input value of a single
resistor (i.e. 1000 ohms), as shown.
Step 6: Carefully restore power to the control, taking
precautions not to make contact with any exposed
voltage sources.
Step 7: Press the decrease “”key and increase
“”buttons simultaneously and hold for approximately
6 seconds. The display will indicate “AC.0”. While
the “0”is flashing, use the increase key to change
this to “22”. Press the “SET” key. The control display
will read “CAL1”.
Step 8: Press and hold the “SET” key for 1 second.
The display will read “HoLd”. Wait for the display to
change to “CAL2”.
Step 9: Proceed with caution to avoid SHOCK haz-
ard. Remove and relocate one end of the jumper cable
to the loose end of the second precision resistor for
the second resistance value (i.e. 2000 ohms), as
shown.

M-33-01-05 3/19/18 7 DE20/T-DE20 Manual
2 Wire RTD Sensor Calibration (Continued)
Step 10: Press and hold the “SET”key for 1 second.
The display will read “HoLd”. WAIT for the display to
reset. After resetting, the display should indicate the
approximate temperature value for the connected pre-
cision resistors (i.e. 511ºF or 266ºC).
Step 11: Turn OFF power and remove the precision
resistors. Reinstall the RTD sensor and the rear cover
of the controller. Return the calibrated control to service .
Resistance Signal
Optional Item Number 5415 board needed.
The configuration and calibration procedures used
for measuring pure resistance are the same as are
used to configure and calibrate a two wire RTD sen-
sor. However, in the setting configuration mode, the
“U1”sensor type parameter must be set to “12”. See
the “U1”instructions on page 11. The unit will then
measure pure resistance from 0-1000 ohms.
3 Wire RTD Sensor
Note: For a 1000 ohm sensor, the DIP switches
should be OFF, OFF, OFF. For 100 ohm, the DIP
switches should be ON, OFF, OFF (see page 13).
RTD devices are precise resistors whose resistance
value varies with temperature. The DE20 control mea-
sures the RTD resistance and compares that mea-
surement with a “standard” set of values stored in the
control memory. To restore, update or verify that this
“standard” set of values is correct, do the following:
Equipment needed:
1. Two precision resistors (tolerance +/- 0.1% or bet-
ter) with a fixed value equal to the nominal value of
the RTD (i.e. 1000 ohms or 100 ohms).
2. A suitable jumper cable to facilitate changing in-
put resistance.
3. A short piece of jumper wire (simulates third wire).
Calibration procedures require the removal of
the rear cover of the control. It also requires that
power is ON, exposing the technician to poten-
tially lethal voltages. Exercise EXTREME CARE
and wear tested electrician’s gloves whenever
power is on.
Les procédures de calibration nécessitent
l'enlèvement du panneau arrière du contrôle.
Ça exige aussi que le courant électrique est
allumé ce qui expose le technicien à des ten-
sions potentiellement létales. Utilisez toujours
un soin extrême et portez des gants certifiés
d'électricien quand le courrant est allumé.
Calibration procedure for the 3 Wire RTD:
Step 1: Turn OFF all power.
Step 2: Remove rear cover.
Step 3: Remove RTD sensor
Step 4: Install the short piece of jumper wire from
terminal #1 to #3.
Step 5: Install the precision resistors in place of the
RTD sensor, as shown in terminals #2 and #3.
Step 6: Install the jumper cable between the loose
end of one of the resistors and the fixed end of the
other resistor to establish an input value of a single
resistor (i.e. 1000 ohms or 100 ohms), as shown.

8 DE20/T-DE20 Manual
3 Wire RTD Sensor Calibration (Continued)
Step 7: Carefully restore power to the controller, en-
suring that you do not come in contact with any ex-
posed voltage.
Step 8: Press the decrease “”key and increase
“”buttons simultaneously and hold for approximately
6 seconds. The display will indicate “AC.0”. While
the “0”is flashing, use the increase key to change this
to “22”. Press the “SET” key. The display will read
“CAL1”.
Step 9: Press and hold the “SET”key for one sec-
ond. The display will read “HoLd”. Wait for the display
to change to “CAL2”.
Step 10: Proceed with CAUTION to avoid SHOCK
hazard. Remove and relocate one end of the jumper
cable to the loose end of the second precision resistor
for the second resistance value (i.e. 2000 ohms or
200 ohms), as shown.
Step 11: Press and hold the “SET” key for one sec-
ond. The display will read “HoLd”. Wait for the display
to reset. After it resets, the display should indicate the
approximate temperature value for the connected pre-
cision resistors (i.e. 511ºF or 266ºC).
Step 12: Turn OFF power to the controller and
remove the precision resistors. Retain for future
M-33-01-05 3/19/18
use. Reinstall the RTD sensor and rear cover of con-
troller. Return the calibrated control to service.
Th erm o c oupl e
The DE20 can be equipped with an optional thermo-
couple sensor board (Item Number 5417*). Installa-
tion requires configuration for the specific thermo-
couple used. The two wire thermocouple is polarized,
therefore it is necessary to connect the negative lead
wire of the thermocouple to the #1 terminal, and the
positive lead to the #2 terminal to maintain proper po-
larity.
Equipment needed:
A precise, NIST traceable, thermocouple calibrator
with suitable extension leads to match the thermo-
couple type used.
Calibration procedures require the removal of
the rear cover of the control. It also requires that
power is ON, exposing the technician to poten-
tially lethal voltages. Exercise EXTREME CARE
and wear tested electrician’s gloves whenever
power is on.
Les procédures de calibration nécessitent
l'enlèvement du panneau arrière du contrôle.
Ça exige aussi que le courant électrique est
allumé ce qui expose le technicien à des ten-
sions potentiellement létales. Utilisez toujours
un soin extrême et portez des gants certifiés
d'électricien quand le courrant est allumé.
*Input board 5417 is no longer available

9 DE20/T-DE20 Manual
Calibration procedure for a thermocouple:
Step 1: Turn OFF all power.
Step 2: Remove rear cover.
Step 3: Remove T/C sensor.
Step 4: Install the thermocouple calibrator to terminal
#1 and #2.
Step 5: CAREFULLY restore power to the controller,
making sure that you do not come in contact with any
exposed voltage.
Step 6: Press the decrease “”key and increase
“”buttons simultaneously and hold for approximately
6 seconds. The display will indicate “AC.0”. While
the “0”is flashing, use the increase key to change
this to “22”. Press the “SET” key. The control display
will read “CAL1”.
Step 7: Adjust the thermocouple calibrator to 0.0ºC
(32.0ºF).
Step 8: Press and hold the “SET”key for one sec-
ond. The display will read “HoLd”. Wait for the display
to change to “CAL2”.
Step 9: Adjust the thermocouple calibrator to
250.0ºC (482.0ºF).
Step 10: Press and hold the “SET”key for one sec-
ond. The display will read “HoLd”. Wait for the display
to reset and display 250.0ºC (482.0ºF).
Step 11: Turn OFF power to the control and remove
the thermocouple calibrator. Reinstall the
thermocouple sensor and the rear cover of the
control. Return the control to service.
VoltageSignalCalibration
The DE20 control measures DC voltage andcom-
pares that measurement with a “standard” set of val-
ues in the control memory. To restore, update or
merely verify that this “standard” set of values is cor-
rect, dothe following:
Make sure that the DIP switch settings are OFF, ON,
OFF (see page 13). The voltage signal must be
con-nected across terminals #1 and #2 of the Adder
Board
M-33-01-05 3/19/18
(Item Number 5415). Terminal #1 is common (nega-
tive), and terminal #2 is the signal connection (posi-
tive). Note: Polarity must be observed.
Calibration procedures require the removal of
the rear cover of the control. It also requires that
power is ON, exposing the technician to poten-
tially lethal voltages. Exercise EXTREME CARE
and wear tested electrician’s gloves whenever
power is on.
Les procédures de calibration nécessitent
l'enlèvement du panneau arrière du contrôle.
Ça exige aussi que le courant électrique est
allumé ce qui expose le technicien à des ten-
sions potentiellement létales. Utilisez toujours
un soin extrême et portez des gants certifiés
d'électricien quand le courrant est allumé.
Calibration procedure for voltage signal:
Step 1: Turn OFF all power.
Step 2: Remove rear cover.
Step 3: Remove sensor.
Step 4: Install the voltage calibrator to terminal #1 and
#2.
Step 5: CAREFULLY restore power to the controller,
ensuring that you do not come in contact with any ex-
posed voltage.
Step 6: Press the decrease “” key and increase “”
buttons simultaneously and hold for approximately 6
seconds. The display will indicate “AC.0”. While the
“0” is flashing, use the increase key to change this to
“22”. Press the “SET” key. The control display will
read “CAL1”.
Step 7: Adjust the power supply to 1.0 volts.
Step 8: Press and hold the “SET” key for one second.
The display will read “HoLd”. Wait for the display to
change to “CAL2”.
Step 9: Adjust the power supply to 10.0 volts.
Step 10: Press and hold the “SET” key for one sec-
ond. The display will read “HoLd”. Wait for the display
to reset and display 10.0.
Step 11: Turn OFF power to the control and remove
the power supply. Reinstall the voltage input and the
rear cover of the control. Return the calibrated control
to service.