Acromag DT233-0600 User manual

Model DT233-0600
USB Programmable, DIN Rail Mounted Transmitter,
w/ Dual Isolated Thermocouple/millivoltage Inputs,
and Passive 4-20mA Loop-Powered Outputs,
USER’S MANUAL
ACROMAG INCORPORATED Tel: [phone]
30765 South Wixom Road email: sales @acromag.com
Wixom, MI 48393-2417 U.S.A.
Copyright 2018, Acromag, Inc., Printed in the USA.
Data and specifications are subject to change without notice. 8501128E

Model DT233-0600
Dual Two-Wire mV/TC Input Transmitters
Acromag, Inc. Tel: [phone] - 2 -
http://www.acromag.com
- 2 -
https://www.acromag.com
Table of Contents
GETTING STARTED
DESCRIPTION.......................................................................................................4
Key Features........................................................................................................................4
Application..........................................................................................................................5
Mechanical Dimensions .......................................................................................................5
DIN Rail Mounting & Removal..............................................................................................6
ELECTRICAL CONNECTIONS............................................................................7
Input Connections................................................................................................................7
Output/Power Connections .................................................................................................8
Earth Ground Connections .................................................................................................11
USB Connections................................................................................................................12
CONFIGURATION SOFTWARE...................................................................... 13
Quick Overview –Android Reconfiguration........................................................................13
Quick Overview –Windows ...............................................................................................19
OPERATION STEP-BY-STEP.......................................................................... 21
Connections.......................................................................................................................21
Thermocouple Millivoltage Versus Temperature Reference Table ......................................22
Setup Communication........................................................................................................23
Configuration.....................................................................................................................24
Calibration (Optional) ........................................................................................................26
Diagnostics ........................................................................................................................28
BLOCK DIAGRAM ............................................................................................. 29
How It Works.....................................................................................................................29
TROUBLESHOOTING....................................................................................... 30
Diagnostics Table...............................................................................................................30
Service & Repair Assistance ...............................................................................................32
ACCESSORIES .................................................................................................... 33
Software Interface Package................................................................................................33

Model DT233-0600
Dual Two-Wire mV/TC Input Transmitters
Acromag, Inc. Tel: [phone] - 3 -
http://www.acromag.com
- 3 -
https://www.acromag.com
USB Isolator.......................................................................................................................33
USB A-B Cable....................................................................................................................33
USB A-mini B Cable............................................................................................................33
ACCESSORIES .................................................................................................... 34
USB OTG Cable ..................................................................................................................34
End Stops...........................................................................................................................34
SPECIFICATIONS .............................................................................................. 35
Model Numbers.................................................................................................................35
Inputs (Each)......................................................................................................................35
Outputs (Each)...................................................................................................................38
USB Interface.....................................................................................................................39
Enclosure & Physical..........................................................................................................40
Environmental...................................................................................................................41
Agency Approvals ..............................................................................................................42
Reliability Prediction..........................................................................................................42
Configuration Controls.......................................................................................................42
REVISION HISTORY......................................................................................... 43
All trademarks are the property of their respective owners.
IMPORTANT SAFETY CONSIDERATIONS
You must consider the possible negative effects of power, wiring, component, sensor, or software failure in the design of
any type of control or monitoring system. This is very important where property loss or human life is involved. You must
perform satisfactory overall system design and it is agreed between you and Acromag, that this is your responsibility.
The information of this manual may change without notice. Acromag makes no warranty of any kind regarding this
material, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose.
Further, Acromag assumes no responsibility for any errors that may appear in this manual and makes no commitment
to update, or keep current, the information contained in this manual. No part of this manual may be copied or
reproduced in any form without the prior written consent of Acromag, Inc.
This manual is for DT233-0600 dual isolated transmitters that convert thermocouple or millivoltage input signals to
isolated 2-wire/loop-powered passive current outputs. If your application requires dual isolated 4-wire (output separate
from DC power) transmitters that drive active (sourcing) voltage/current outputs, please refer to similar SP333 models.
For DC current/voltage input, please refer to other SP200 (2-wire loop-powered) and SP300 (4-wire DC powered) models.

Model DT233-0600
Dual Two-Wire mV/TC Input Transmitters
Acromag, Inc. Tel: [phone] - 4 -
http://www.acromag.com
- 4 -
https://www.acromag.com
GETTING STARTED
DESCRIPTION
Symbols on equipment:
Means “Refer to User’s Manual
(this manual) for additional
information”
The DT233-0600 Dual Transmitter provides two isolated ANSI/ISA Type II
transmitter channels for thermocouple/mV input signals that drive two isolated
loop-powered passive current outputs. This model interfaces with thermocouple
Type J, K, T, R, S, B, E, N, or ±100mV input signals at separately isolated inputs, and
modulates two isolated 2-wire current loops proportional to their respective input.
This dual channel transmitter may optionally operate as a single channel 1
transmitter, or as a channel 1 signal splitter.
Channels of this transmitter are setup and calibrated using a wired USB connection
to a Windows-based PC running configuration software (Windows 7 and later
versions only), or an Android-based tablet or smartphone running our Agility mobile
APP. The unit provides isolated output signals linearized to isolated input
temperatures with independently adjustable input and output ranges, °C or °F unit
selection, variable input filtering, and user-programmable or Namur output range
clamp/fault levels.
Key Features
•Two isolated DT transmitter channels in a 17.5mm wide enclosure for high-
density DIN-rail mounting doubles the density of our TT series.
•This dual transmitter is very flexible in that it may also function as a single
transmitter, or signal splitter.
•Unit is digitally setup/calibrated via wired USB to a Windows-based personal
computer, or USB-OTG to an Android tablet or smartphone.
•Adjustable input ranges and adjustable output ranges. Transmitter inputs
and outputs can be scaled independently and differently for each channel.
•Unit supports TC Type J, K, T, R, S, B, E, N, or ±100mV inputs.
•Each transmitter channel has high measurement accuracy & linearity w/24-bit
input & 16-bit output conversion.
•Its passive current outputs are linearized with respect to TC temperature and
include accurate Cold Junction Compensation in each channel.
•Supports both Celsius and Fahrenheit temperature configuration Variable
input filter adjustment for each channel.
•Supports up-scale or down-scale lead-break/burnout detection.
•Variable input filter adjustment (none, low, medium, high).
•Each 2-wire loop-powered transmitter has non-polarized output connections.
•Transmitters have very low loop burden with terminal voltage down to 7V.
•Can transmit Normal or reverse acting output(s).
•You may program your own output clamp limits or select Namur compliant
range/limits, helpful to discern over-range conditions from fault detection.
•Extra output connection screw for optional “sourced”output wiring.
•Wide ambient temperature operation.
•Thoroughly tested and hardened for harsh environments.
•CE Approved.
•FCC Conformity Class B
•cULus Listed - Class I/Division 2 - Haz. Loc., ATEX, & IECEx.
!

Model DT233-0600
Dual Two-Wire mV/TC Input Transmitters
Acromag, Inc. Tel: [phone] - 5 -
http://www.acromag.com
- 5 -
https://www.acromag.com
Application
For additional information on this
device and related topics, please
visit www.acromag.com and
download whitepaper 8500-904,
Introduction to Two-Wire
Transmitters.
This dual channel transmitter is designed for high-density mounting with channel
pairs mounted side-by-side on 17.5mm centers to 35mm T-type DIN rails.
DT233 models isolate two channels of thermocouple or millivoltage input. Each
channel is independently configured and modulates a corresponding isolated 4-
20mA current loop that is linear to sensor temperature or input voltage.
Each transmitter output is a passive 2-wire current loop, allowing it to transmit 4-
20mA over long distances with high noise immunity. The inherent live-zero 4mA
offset of the current loop offers built-in output fault detection, should an output
wire break. An extra connection screw at each transmitter output allow it to be
optionally wired as a “sourced” 4-20mA output (see Optional Output Wiring).
Mechanical Dimensions
Units may be mounted to 35mm
“T” type DIN rail (35mm, type
EN50022), and side-by-side on
0.69-inch centers.
WARNING: IEC Safety Standards
may require that this device be
mounted within an approved
metal enclosure or sub-system,
particularly for applications with
exposure to voltages greater than
or equal to 75VDC or 50VAC.

Model DT233-0600
Dual Two-Wire mV/TC Input Transmitters
Acromag, Inc. Tel: [phone] - 6 -
http://www.acromag.com
- 6 -
https://www.acromag.com
DIN Rail Mounting & Removal
NOTE: It is recommended that this
unit be mounted upright on a DIN
rail allowing free air flow intake
from the bottom vent to flow
through the unit and out the top
vent. This will allow the unit to
run cooler, improving performance
and helping to extend the life of
the electronics.
Refer to the following figure for attaching and removing a unit from the DIN rail. A
spring-loaded DIN clip is located on the input side bottom. The opposite rounded
edge at the bottom of the output side allows you to tilt the unit upward to lift it
from the rail while prying the spring clip back with a screwdriver. To attach the
module to T-type DIN rail, angle the top of the unit towards the rail and place the
top groove of the module over the upper lip of the DIN rail. Firmly push the unit
downward towards the rail until it snaps into place. To remove it from the DIN rail,
first separate the input terminal blocks from the bottom side of the module to
create a clearance to the DIN mounting area. You can use a screwdriver to pry the
pluggable terminals out of their sockets. Next, while holding the module in place
from above, insert a screwdriver into the lower path of the bottom of the module to
the DIN rail clip and use it as a lever to force the DIN rail spring clip down while
pulling the bottom of the module outward until it disengages from the rail. Then
simply lift it from the rail.

Model DT233-0600
Dual Two-Wire mV/TC Input Transmitters
Acromag, Inc. Tel: [phone] - 7 -
http://www.acromag.com
- 7 -
https://www.acromag.com
ELECTRICAL CONNECTIONS
WARNING –EXPLOSION HAZARD –Do not disconnect equipment unless power has
been removed or the area is known to be non-hazardous.
WARNING –EXPLOSION HAZARD –Substitution of any components may impair
suitability for Class I, Division 2.
WARNING –EXPLOSION HAZARD –The area must be known to be non-hazardous
before servicing/replacing the unit and before installing.
Wire terminals can accommodate 14–28 AWG (2.08–0.081mm2) solid or stranded
wire with a minimum temperature rating of 90oC. Input wiring may be shielded or
unshielded type. Ideally, output wires should be twisted pair, or shielded twisted
pair. Terminals are pluggable and can be removed from their sockets by prying
outward from the top with a flat-head screwdriver blade. This model supports two
separate isolated input signals at TB1 and TB3. Strip back wire insulation 0.25-inch
on each lead and insert the wire ends into the cage clamp connector of the terminal
block. Use a screwdriver to tighten the screw by turning it in a clockwise direction
to secure the wire (0.5-0.6Nm torque). Since common mode voltages can exist on
signal wiring, adequate wire insulation should be utilized and proper wiring
practices followed. As a rule, output wires are normally separated from input wiring
for safety, as well as for low noise pickup.
Important –End Stops: For hazardous location installations (Class I, Division 2 or
ATEX/IECEx Zone 2), it should utilize two end stops (like Acromag 1027-222) to help
secure modules to the DIN rail (not shown).
Input Connections
Sensor input wires are wired directly to transmitter input terminals at the bottom of
the module (the spring-loaded DIN clip side), as shown in the connection drawing
below. Observe proper polarity when making input connections.
•Separate transmitter inputs at TB1 and TB3 are isolated from each other and
from their outputs at TB4 and TB6.As a single transmitter, input 1 is to
TB1/channel 1 and output/power are wired to TB4/output 1. As a signal
splitter, input 1 is to TB1/channel 1 and this signal is transmitted to isolated
outputs at both TB4 and TB6.
•Inputs are polarized ±, observe proper polarity. The left-most terminal is the
positive sensor input and labeled “+”. The center terminal is signal return. The
rightmost terminal is not used in this model. See the connection figure below.
TIP (Mounting): For best performance, it is recommended that the unit be
mounted upright on a DIN rail such that the thermocouple input connections face
downward. This allows cool air intake to the unit at the bottom vents to pass
through the circuit and exit as warm air at the top, for cooler operation and a more
even heat distribution, which improves the accuracy of its thermocouple cold
junction compensation, overall performance, and helps to extend its operating life.
!

Model DT233-0600
Dual Two-Wire mV/TC Input Transmitters
Acromag, Inc. Tel: [phone] - 8 -
http://www.acromag.com
- 8 -
https://www.acromag.com
Output/Power Connections
The transmitter output is
passive. It modulates loop
current relative to its input and
does not drive power to the
load (a separate external loop
power supply is required to
excite the current loop).
This dual transmitter has two isolated ANSI/ISA Type 2 outputs in which their
channel’s power and output signal share the same two leads, and each transmitter
output has a “floating” connection with respect to earth ground. Connect a DC
power supply and load in series in each of the two-wire output loops as shown in
the drawings that follow.
•Passive output connections are not polarized. The output + and –designations
are for reference only with current normally input to Output+ and returned via
Output- (current sinking).
•Loop supply voltages should be from 7-32V DC with the minimum voltage level
adjusted above 7V (transmitter) to supply over-range current to the loop load,
plus any transmission line drop.
•Variation in power supply voltage has negligible effect on transmitter
accuracy between the 7V minimum required (transmitter only) and 32V
maximum allowed.
•Variation in load resistance has negligible effect on output accuracy if the loop
supply voltage level is set correctly for the load resistance.
•Note the traditional placement of earth ground in a current loop. Output
Earth ground is normally applied at the loop power supply minus terminal.
Each 2-wire transmitter output varies off this ground by the voltage drop in the
load resistance and lead-wire of the loop.

Model DT233-0600
Dual Two-Wire mV/TC Input Transmitters
Acromag, Inc. Tel: [phone] - 9 -
http://www.acromag.com
- 9 -
https://www.acromag.com
Output/Power
Connections…
The traditional loop-powered 2-wire “sinking” output connections are shown above.
The transmitter wired as shown is a passive device that does not drive power to the
loop and only modulates the current in the loop according to its input level.
Shielded twisted-pair wiring is often used in the output to connect the longest
distance between the field transmitter and the remote receiver(s) as shown. Each
output of this transmitter is isolated and will fluctuate relative to earth ground by
the voltage drop in the output loop load and connection wire. This makes the 2-
wire transmitter flexible in the way it connects to various “Receiver” devices.
This passive device does not drive power to the loop and a separate loop power
supply is required. In most installations, the output loop power supply will be local
to either the transmitter, or local to the remote receiver of the loop. Common
receiver devices may include the input channel of a Programmable Logic Controller
(PLC), a Distributed Control System (DCS), or a panel meter. Some receiver devices
already provide excitation for the transmitter loop and these are referred to as
active or “sourcing inputs”. Other receivers that do not provide loop excitation are
referred to as passive or “sinking” inputs, and these require that a separate power
supply connect within the loop. These types of receivers are depicted in the figures
on the next two pages.

Model DT233-0600
Dual Two-Wire mV/TC Input Transmitters
Acromag, Inc. Tel: [phone] - 10 -
http://www.acromag.com
- 10 -
https://www.acromag.com
Output/Power
Connections…
WARNING: For compliance to applicable safety and performance standards,
the use of twisted pair output wiring is recommended. Failure to adhere to
sound wiring and grounding practices as instructed may compromise safety,
performance, and possibly damage the unit.
TIP - Ripple & Noise: Place additional capacitance at the load to help reduce the
60Hz/120Hz ripple sometimes present in industrial applications. For large 60Hz
ripple, connect an external 1uF or larger capacitor directly across the load to reduce
excess ripple. Most modern systems will use high-speed acquisition at the load
making them more sensitive to noise--high frequency noise may be significantly
reduced in these applications by placing a 0.1uF or 0.01uF capacitor directly across
the load, as close to the load as possible (this may also raise RF immunity).
TIP - Inductive Loads: If either two-wire current loops include a highly inductive
load (such as an I/P current-to-pressure transducer), this may reduce output
stability. In this case, place a 0.1uF capacitor directly across the inductive load(s)
and this will typically cure the problem.

Model DT233-0600
Dual Two-Wire mV/TC Input Transmitters
Acromag, Inc. Tel: [phone] - 11 -
http://www.acromag.com
- 11 -
https://www.acromag.com
Output/Power
Connections…
This model includes an extra termination screw at each output marked “C” which is
intended to provide a convenient tie point for a “sourcing” wiring variation as
shown below. The C terminals do not connect to the internal circuit but are used to
simply join wired connections. Use of this terminal in your wiring scheme allows
you to connect external power local to the transmitter and form a “sourcing” entity
from this “sinking” output as shown below.
Earth Ground Connections
IMPORTANT: A USB isolator is
recommended when configuring
or calibrating a unit to avoid the
ground loop that occurs if your
input signal is also earth grounded
(A PC commonly ties earth ground
to its USB port signal and shield
ground, which is held in common
to the input circuit ground of this
transmitter).
The unit housing is plastic and does not require an earth ground connection to
itself. If the module is mounted in a metal housing, an earth ground wire
connection to the metal housing’s ground terminal (green screw) is usually required
using suitable wire per applicable codes. As a rule of good practice, isolated circuits
are normally earth grounded at one point. See the Electrical Connections Drawing
for Output/Power connections and note the traditional position of earth ground for
a 2-wire output current loop. That is, earth ground is normally applied at the output
loop power minus terminal and in common with the loop load or loop receiver
minus terminal. The Type II transmitter output terminals will have a “floating”
connection relative to earth ground and their potential varies with the voltage drop
in the load and connection wire. Circuits wired to isolated analog inputs should be
earth grounded as reflected in their input connection diagram. Ground connections
noted are recommended for best results and help protect the unit and its isolated
circuitry by giving it a low impedance path to ground for shunting destructive
transient energy away from sensitive module circuitry. Respect the traditional
position of earth ground in a two-wire current loop and avoid inadvertent
connections to earth ground at other points in the same loop, which would drive
ground loops and negatively affect operation.

Model DT233-0600
Dual Two-Wire mV/TC Input Transmitters
Acromag, Inc. Tel: [phone] - 12 -
http://www.acromag.com
- 12 -
https://www.acromag.com
USB Connections
Transmitter is setup, configured, and calibrated via configuration software that runs
on a Windows-based PC connected via USB (Windows 7 or later required), or a USB
connection to a compatible Android-based tablet or smartphone with our Agility
mobile APP installed. Refer to the drawing below to connect your PC or laptop to
the transmitter for reconfiguration and calibration using this software (the optional
connection to an Android smartphone or tablet would typically not require the use
of an isolator, because those devices are battery powered).
WARNING: The intent of mating
USB with this transmitter is so that
it can be conveniently set up and
calibrated in a safe area, then
installed in the field which may be
in a hazardous area. Do not
attempt to connect a PC or laptop
to this unit while installed in a
hazardous area, as USB energy
levels could ignite explosive gases
or particles in the air.
•USB Signal Isolation is Required (See Below) - You may use Acromag model
USB-ISOLATOR to isolate your USB port, or you can optionally use another USB
signal isolator that supports USB Full Speed operation (12Mbps).
•Configuration Requires USB and Loop Power - This transmitter draws power
from both the current loop and from USB during set up.
IMPORTANT: USB logic signals to the unit are referenced to the potential of its
internal signal common. This ground is held in common with the USB ground and
shield ground. The potential of a transmitter’s current output pin (output minus)
relative to earth ground varies with the load current and resistance (net IR drop).
Without isolation, IR drop would drive a potential difference between the normally
grounded current loop and grounded USB connection at the PC, causing a ground
loop that would inhibit set up & calibration, or may even damage the transmitter. It
is recommended you use an isolated USB connection. Alternatively, you could avoid
using an isolator if a battery powered laptop is used to connect to the transmitter,
and the laptop has no earth ground connection, either directly or via a connected
peripheral.
!
Note: Output/Power to Transmitter must
be applied before USB connection
(See Output/Power Connections).

Model DT233-0600
Dual Two-Wire mV/TC Input Transmitters
Acromag, Inc. Tel: [phone] - 13 -
http://www.acromag.com
- 13 -
https://www.acromag.com
CONFIGURATION SOFTWARE
Quick Overview –Android Reconfiguration
This transmitter can be configured & calibrated via the
Acromag Agility™Config Tool App. This software app can
be downloaded free of charge from the Google Play store
at play.google.com and is compatible with Android devices
that use Ice Cream Sandwich (4.0) or later OS.
To connect to this transmitter, a USB OTG (On-The-Go) cable (Acromag
5028-565) and USB A to Mini-B cable (Acromag 4001-113) are also required.
When you start the app, the initial Agility Connection screen at left will be
presented and if you have also connected a module using a USB OTG cable,
your module will be listed in the “Selected Device:” field of the Connection
screen as shown.
The ability to select other devices only applies to Bluetooth devices which
also utilize this app. Tap the [CONNECT] button to open communication
with the device indicated to the right of “Selected Device” and move to the
main portion of the app shown in the second screen at left. Note Android
requires user permission to access external hardware--If the Device List
displays “No Device Permission”, select the device and when prompted to
give permission to access the USB device, and select [OK].
If you wish to view a wiring diagram for your transmitter model, tap the
arrow next to “Wiring Diagram”. You may swipe left or right to view more
diagrams.
The main screen also has three icons across the top: an Acromag logo
w/connected model indicated, a question mark, a gear icon, and three
vertical dots. These icons access additional features of this software as
follows:
This icon located in the top left-hand corner of most app screens
serves as a Home button, which when tapped will return you to
the Connection page of the app from subsequent pages.
Tapping the question mark will access a Self-Test utility useful for
testing your device connection.
Tapping the Gear/Settings icon will access a Utility Page to do a
device Reboot, Reset Factory Calibration, or restore factory
Settings.
Tapping this icon will return “About” & “Contact Acromag”
Information.
A short description of what each icon does follows:

Model DT233-0600
Dual Two-Wire mV/TC Input Transmitters
Acromag, Inc. Tel: [phone] - 14 -
http://www.acromag.com
- 14 -
https://www.acromag.com
Quick Overview –Android Reconfiguration...continued
The HELP area of the application invokes a Self-Test feature that
can be used to determine if your smart phone or tablet has its
Bluetooth wireless technology enabled (useful for microBlox
product applications), whether any modules can be detected by rescanning,
whether a device is connected, and whether the microcontroller of the
connected module is operational. You simply tap [BEGIN SELF-TEST] to
perform the diagnostic exchange and review the results returned. If one or
more tests indicate Failed, you can also tap the down arrow message below
the self-test report to access additional information regarding failed tests.
Optionally, you can review an online video tutorial on working with the unit
by tapping the Video Tutorial URL line.
Or, if you wish to contact Acromag for assistance, you can tap the [CONTACT
ACROMAG] bar to obtain the phone and email information window shown
below for talking to Acromag directly (the same information is also obtained
via the menu dotted action bar icon and “Contact Acromag” selection).
You may also refer to the Troubleshooting Table in this manual which lists
common issues related to working with these transmitters and some
recommended remedies.

Model DT233-0600
Dual Two-Wire mV/TC Input Transmitters
Acromag, Inc. Tel: [phone] - 15 -
http://www.acromag.com
- 15 -
https://www.acromag.com
Quick Overview –Android Reconfiguration...continued
Tap the [Gear] icon in the Action bar to access the Utility Page
shown at left. Utilize these features if you if you encounter erratic
behavior with your transmitter and need to get out of trouble,
perhaps if you ever inadvertently misconfigure or improperly calibrate a
transmitter.
You can tap [REBOOT DEVICE] on this page to reset/restart the connected
transmitter, perhaps if it ever appears to freeze, or exhibits erratic
operation. This is akin to a power-on reset of the transmitter.
You can tap [RESET FACTORY CALIBRATION] to get out of trouble if you ever
miscalibrate a transmitter (this only affects transmitter calibration).
You can tap [RESTORE FACTORY SETTINGS] to get out of trouble if you ever
misconfigure or miscalibrate a transmitter (this affects both transmitter
calibration and configuration). You can also use this feature to de-
commission a transmitter.
If you tap the right-most dotted Menu icon of the action bar at the
top right of your screen, you will get a selection menu for “About”
information on this software application, and “Contact Acromag”
for contact information, both shown at left
Below the icons of the top line are file three tabs: Configuration, Calibration,
and Diagnostic Center, each of which are described in the following pages.
Quick Overview –Android Reconfiguration...continued

Model DT233-0600
Dual Two-Wire mV/TC Input Transmitters
Acromag, Inc. Tel: [phone] - 16 -
http://www.acromag.com
- 16 -
https://www.acromag.com
Input/Output Configuration
The I/O Configuration screen is shown at left and is used to Configure your
transmitter channels Input and Output. You can set your input
type/range, digital filtering level, break detect, CJC, rescale each channels
input and output, and set the input units via this screen.
Note that if your unit is connected when you select this tab, the app
automatically reads your transmitter’s current I/O and scaling information
and displays it.
Likewise, changing any option on this page sends the changes to the
transmitter immediately.
Note that the Device Status is indicated at the bottom of all pages and will
report if changes were sent successfully (Connected).
Input Calibration
If you have setup your unit and encounter excessive error, you may click
the Calibration tab to display the Calibration control screen shown at left,
which presents Input calibration controls first, followed by Output
calibration controls as you scroll down the page.
IMPORTANT: The transmitter has already had its input & output channels
factory calibrated with high precision. If you attempt to recalibrate the
input or outputs, you may degrade its performance if done improperly, or
by using low grade equipment. Consider recalibration carefully.
The selected input range being calibrated is indicated at the top. The
software does not use your scaled sub-range zero to calibrate, but the
zero of the nominal range selected. Some sub-ranges have their
calibration extrapolated from the calibration of a larger native range.
Calibrate the largest native range first to keep its recalibration from over-
writing any sub-range calibration. These transmitters have two input
terminals specific to input ranges--be sure to connect your input signal to
the proper terminals.
For input zero calibration, connect a precise input signal level for the zero
of your range, then tap the [CALIBRATE INPUT ZERO] button one time to
set the input ADC level to its input range zero (0%) point.
For full-scale calibration, connect a precise input signal level for the full-
scale value of your range, then tap [CALIBRATE INPUT FULL-SCALE] one
time to set the input ADC level to its input range full-scale (100%).
The device status at the bottom of the page will report if the calibration
was sent successfully.

Model DT233-0600
Dual Two-Wire mV/TC Input Transmitters
Acromag, Inc. Tel: [phone] - 17 -
http://www.acromag.com
- 17 -
https://www.acromag.com
Quick Overview –Android Reconfiguration...continued
Output Calibration (Each of Two Outputs)
Scroll down the Calibration page to access the Output Calibration controls:
output channel selector, adjustment controls, and the [CALIBRATE
OUTPUT ZERO] and [CALIBRATE OUTPUT FULL-SCALE] buttons.
First select the Output channel to calibrate, and its output range will be
displayed along with some instructions on how to proceed.
For Output Zero calibration, use the output adjustment slider and the
coarse and fine adjustment controls to precisely set your output zero level
while precisely monitoring your output signal. Be sure to use a meter with
an accuracy at least 4x better than the signal you are measuring for best
results. Note that the output adjustment controls temporarily remove
control of the output from the input to accomplish calibration (control of
the output level returns to the input signal after 30 seconds).
Once your output level is precisely set to its zero point (4.000mA for this
transmitter), tap the [CALIBRATE OUTPUT ZERO] button one time to set
the output DAC level (its corresponding digital count) to correspond to the
zero (0%) of your output range.
For Full-Scale calibration, use the output adjustment slider and the coarse
and fine adjustment controls to precisely set your output full-scale level
while precisely monitoring your output signal. Be sure to use a meter with
an accuracy at least 4x better than the signal you are measuring for best
results. Note that the output adjustment controls temporarily remove
control of the output from the input level to accomplish calibration
(control of the output level returns to the input signal after 30 seconds).
Once your output level is precisely set to its full-scale level (20.000mA for
this transmitter), tap the [CALIBRATE OUTPUT FULL-SCALE] button one
time to set the output DAC level (its corresponding digital count) to
correspond to the full-scale (100%) level of the output range.
Repeat the Output Calibration of zero and full-scale for the second output
as required by selecting the opposite channel.
If following calibration, your output acts erratic or appears imprecise, you
may need to repeat input or output calibration, being very careful to take
accurate measurements and input correct signal levels. If you are
measuring voltage across an output load resistance to measure the
current level (recommended), make sure that you use exact resistance
when calculating the measured loop current. When rescaling I/O, make
sure that you have adequate I/O span, as “too-tight”input or output spans
will have diminished resolution and magnify error.

Model DT233-0600
Dual Two-Wire mV/TC Input Transmitters
Acromag, Inc. Tel: [phone] - 18 -
http://www.acromag.com
- 18 -
https://www.acromag.com
Quick Overview –Android Reconfiguration...continued
Performing Diagnostics (Polling & Trending the Inputs)
The Diagnostic Center screen tab is shown at left and used to verify input
(ADC) operation of your transmitter. This page can be used to poll the
input data and display its value or graph the input data and trend its value.
The input type currently set is shown at the top of the screen (the input
value, not the scaled input value is polled).
Select the Indicator pointer to set your desired indication to “Digital”
(value) or “Graph” (trend).
You can specify a polling period to set the interval between polled
readings by over-typing the value in the Polling Period field.
Start polling the input by tapping the [START POLLING] button.
Clear the polling data by tapping [CLEAR DATA].
Check the “Save Data” box if you wish to log the polled values to a CSV
(Comma Separated Value) data file for reference.
Note the Communication Status of the device is indicated at the bottom of
the screen.

Model DT233-0600
Dual Two-Wire mV/TC Input Transmitters
Acromag, Inc. Tel: [phone] - 19 -
http://www.acromag.com
- 19 -
https://www.acromag.com
Quick Overview –Windows
Click “Open” to connect to the DT233-0600
and your screen will look like:
For detailed configuration and calibration
procedures, see the Operation Step-By-Step
section of the Technical Reference on page 22 of
this manual.
In addition to the Android Agility mobile app, this transmitter can
be optionally configured and calibrated via its USB Configuration
Software and a USB connection to a Windows PC or laptop. The
configuration software can be downloaded free of charge from our
web site at https://www.acromag.com. This software is also
included on a CDROM bundled with the Configuration Kit TTC-SIP
(see Accessories section). For the DT233 model, look for program
DT233Config.exe. This software is compatible with Windows 7 or
later versions of the Windows operating system.
The initial configuration software screen for the DT233 model is
shown at left after clicking [Open] to open communication with a
connected module. The Configuration screen is divided into three
pages as follows: Communication Set up, I/O Config/Test, and
Calibration. A short description of each of these pages follows.
Communication Setup–First Select/Connect to Unit Here
•Select from connected transmitters using the Device scroll field
and Open/Close communications with them.
•Display the Model, Serial Number, and Manufacturer of the
connected transmitter, and report connection Status, or reset
a connected unit.
I/O Config/Test –Reconfigure and/or Test the Unit Here
•You can click the [Get I/O Config] button to retrieve the I/O
configuration of the currently connected transmitter.
•Select the Input Range for the model. For an DT233, you can
select current ranges ±20mA, 0-20mA, 4-20mA, 0-11.17mA, or
±1mA for inputs at TB1, or voltage ranges of ±0.5V and 0-
500mV for inputs at TB2.
•Set the level of digital filtering to High, Medium, Low, or None.
Note that the corresponding I/O response time varies with
filter selection (see Specifications).
•View the unit’s communication status in the Status field.
•Use the I/O Scaling fields to specify the specific input range
endpoints that are to correspond to the 4mA and 20mA output
endpoints of each output. You can scale the input differently
for each output.
•You may set your own output range limits or enable
Namur limits that differentiate fault levels from over and
under range detents.
•Last, after making I/O changes, send your settings to the unit
by clicking the [Send I/O Config] button and following the on-
screen prompts.

Model DT233-0600
Dual Two-Wire mV/TC Input Transmitters
Acromag, Inc. Tel: [phone] - 20 -
http://www.acromag.com
- 20 -
https://www.acromag.com
Quick Overview - Windows..
HELP –You can press F1 for Help on a selected or
highlighted field or control. You can also click the
[?] button in the upper-right hand corner of the
screen and then click to point to a field or control
to get a Help message pertaining to the item you
pointed to.
TEST I/O - Optionally, Verify Unit Operation Here
After making CONFIGURE I/O changes, I/O Scaling, setting Output
limits, and Sending your configuration to the unit, you can TEST I/O
and Start/Stop Polling the input channel, as required to check your
input readings.
•Click [Start Polling] to periodically read your input channel and
validate its operation. Click [Stop Polling] to stop polling the
input channel. Note the simulated red lamp left of the button
flashes slowly when the software is polling the input channel.
CALIBRATION - Calibrate the Input and/or Output if Needed
The unit has already been factory calibrated, but if you encounter
excessive error, you can click the Calibration tab to display the
Calibration control page shown in the screen at left. To calibrate the
Input or Output stage of this model, simply click the respective Input
or Output “Instructions”button to get started and follow the on-
screen prompts.
Input…
Set the Input Range to calibrate on the I/O Config/Test page and
click [Send I/O Config] before attempting calibration. On the
Calibration page, click the [Input Cal Instructions] button to begin
input calibration.
When you click the [Zero] or [Full Scale] buttons of CALIBRATION -
Input, you will be prompted to apply a current at TB1, or voltage
level at TB2. Once you have applied the signal to the correct input
terminals, click [OK]of the prompt to calibrate it and follow the on-
screen instructions.
Output…
Click [Output Cal Instructions] to begin output calibration. You will
be prompted to adjust the input as required to drive the output to
precisely 4.000mA (Zero), or 20.000mA (Full-Scale). Once the
output is set to zero or full-scale, you simply click the corresponding
[Zero] or [Full-Scale] button of CALIBRATION –Output to set the
output zero or full-scale endpoint.
Factory Settings (In Case of Trouble or for Sanitation Purposes)
•Restores a transmitter to its original factory calibration.
•Restores a transmitter to its initial factory configuration.
You can click [Restore ...]buttons if you misconfigure or improperly
calibrate a transmitter such that its operation appears erratic.
Calibration Status (Bottom of Screen)
•Displays communication status messages for the calibration
process.
The CALIBRATION STATUS field at the bottom of the screen will
display status messages relative to calibration.