RST DT2350 User manual

RST INSTRUMENTS LTD.
11545 Kingston St.,
Maple Ridge, BC
CANADA V2X 0Z5
SALES + SERVICE + MANUFACTURING:
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ELM0099A
All efforts have been made to ensure the accuracy and
completeness of the information contained in this document. RST
Instruments Ltd reserves the right to change the information at any
time and assumes no liability for its accuracy.
Copyright © 2019. RST Instruments Ltd. All rights reserved.
Document Number: ELM0099A
Release Date: 09-Apr-2019
DT2350 2-Channel Strain
Gauge Load Cell Data
Logger Manual

DT2350 2-Channel Strain Gauge
Load Cell Data Logger Manual
ELM0099A
RST Instruments Ltd.
Page ii
TABLE OF REVISIONS
Rev.
Revision History
Date
Prepared
By
Approved
By
A
Initial release
09-Apr-2019
MP
JW

DT2350 2-Channel Strain Gauge
Load Cell Data Logger Manual
ELM0099A
RST Instruments Ltd.
Page iii
TABLE OF CONTENTS
1 INTRODUCTION............................................................................................................1
2 SAFETY ......................................................................................................................2
3 INSTALLATION.............................................................................................................2
3.1 Installation Tools and Materials.........................................................................2
3.2 Software Installation..........................................................................................2
3.3 Load Cell Connection........................................................................................3
4 LOGGER CONFIGURATION............................................................................................8
4.1 Logging Tab......................................................................................................8
4.2 Status Tab ......................................................................................................10
4.3 Data View Tab ................................................................................................11
4.4 Monitor Tab.....................................................................................................12
4.4.1 Graphical Monitor..................................................................................13
4.5 Sensor Tab.....................................................................................................14
4.6 Connections Tab.............................................................................................15
5 TROUBLESHOOTING ..................................................................................................16
6 BATTERY INFORMATION.............................................................................................17
6.1 Battery Type ...................................................................................................17
6.2 Estimated battery life.......................................................................................17
6.3 Changing the battery.......................................................................................18
7 SERVICE AND REPAIR................................................................................................19

DT2350 2-Channel Strain Gauge
Load Cell Data Logger Manual
ELM0099A
RST Instruments Ltd.
Page iv
LIST OF FIGURES
Figure 1-1 DT2350 load cell data logger ....................................................................................1
Figure 1-2 Cable gland nut wrench ............................................................................................1
Figure 3-1 Loosen the cable gland using two 20 mm wrenches.................................................3
Figure 3-2 Loosen the cable gland using the cable gland nut wrench ........................................4
Figure 3-3 Remove the cable plug from the cable gland ............................................................4
Figure 3-4 DT2350 sensor connections......................................................................................5
Figure 3-5 Tighten the cable gland.............................................................................................6
Figure 3-6 Activate the battery...................................................................................................7
Figure 3-7 Tighten screws in the following order and pattern .....................................................7
Figure 3-8 Mini-B USB Port........................................................................................................7
Figure 3-9 Port and status indicators..........................................................................................8
Figure 4-1 The logging tab.........................................................................................................9
Figure 4-2 The status tab.........................................................................................................11
Figure 4-3 The data view tab....................................................................................................12
Figure 4-4 The monitor tab.......................................................................................................12
Figure 4-5 The graphical monitor .............................................................................................13
Figure 4-6 Sensor tab .............................................................................................................14
Figure 6-1 Tighten screws in the following order and pattern ...................................................19
LIST OF TABLES
Table 3-1 Wiring chart for 4- and 6-pin connectors.....................................................................5
Table 4-1 Logging tab options and description.........................................................................10
Table 4-2 Sensors tab options and description.........................................................................15
Table 4-3 Connections tab options and description..................................................................16
Table 5-1 Common Troubleshooting Problems and Solutions..................................................16
Table 6-1 Battery types............................................................................................................17
Table 6-2 Estimated battery life................................................................................................18

DT2350 2-Channel Strain Gauge
Load Cell Data Logger Manual
ELM0099A
RST Instruments Ltd.
Page 1
1 INTRODUCTION
The DT2350 Strain Gauge Load Cell Data Logger is a 2-channel data logger
purpose-built for resistance strain gauge load cells and other strain gauge sensors,
such as pressure transducers.
FIGURE 1-1 DT2350 LOAD CELL DATA LOGGER
A mini-B USB connector cable and RST Resource DVD are included in a standard
DT2350 data logger shipment.
Contact RST Instruments if any items are missing from the shipment.
Visit https://www.rstinstruments.com/Geotechnical-Videos.html ‘Data Logger
Hardware Connections’ for an instructional installation video.
An optional Cable Gland Nut Wrench (Figure 1-2) may be purchased from RST for
effortless cable gland access. Contact RST for more details.
FIGURE 1-2 CABLE GLAND NUT WRENCH

DT2350 2-Channel Strain Gauge
Load Cell Data Logger Manual
ELM0099A
RST Instruments Ltd.
Page 2
2 SAFETY
Avoid potential electrical faults when wiring the DT2350 Strain Gauge Load Cell
Data Logger.
Do not wire the DT2350 data logger in a lightning storm.
The DT2350 data logger uses a 3.6 V lithium-thionyl chloride battery. Standard
batteries (defined as SAFT LSH 20 D-cell, or equivalent) are used for radio-enabled
loggers and compact batteries (defined as either one SAFT LSH 14 light C-cell
battery, two SAFT LS 14500 AA batteries, or equivalent) are used for stand-alone
data loggers. For more information about batteries, please see Section 6.
CAUTION:
DO NOT ATTEMPT TO RECHARGE THE BATTERY.
DO NOT REPLACE THE BATTERY WITH AN ALKALINE OR ZINC-CARBON BATTERY.
DO NOT SHIP THE DT2350 DATA LOGGER WITH THE BATTERY INSIDE.
3 INSTALLATION
3.1 INSTALLATION TOOLS AND MATERIALS
•Desktop or laptop computer with USB port.
◼Supported operating systems include Microsoft™ Windows Vista, 7, 8, and 10.
•Phillips #2 screwdriver.
•Flat-head 2.5 mm screwdriver.
•Two 20 mm open wrenches or small crescent wrenches.
◼Optional: Cable Gland Nut Wrench.
3.2 SOFTWARE INSTALLATION
1Insert the supplied RST Resource DVD into your computer’s DVD drive. The disk
contains an auto-run feature.
2Click the install button. Follow the on-screen instructions. The default directory is:
C:\Program Files\RST Instruments\DT Logger Host\
The drivers will automatically install. Refer to Section 5 if they do not install.

DT2350 2-Channel Strain Gauge
Load Cell Data Logger Manual
ELM0099A
RST Instruments Ltd.
Page 3
3.3 LOAD CELL CONNECTION
There are two cable glands on the exterior of the DT2350 logger. The following
instructions detail the steps necessary to loosen the glands and insert and connect
the cable.
CAUTION:
AVOID OPERATIONS WITH THE LOGGER COVER OFF IN RAIN OR SNOW.
DO NOT ALLOW RAIN OR SNOW TO ENTER THE ENCLOSURE.
DO NOT INSTALL IN FLOODABLE LOCATIONS.
THE LOGGER IS RAIN-TIGHT ONLY AND NON-SUBMERSIBLE.
NOTE: THE PICTURES IN THIS SECTION ARE INSTRUCTIONAL AND MAY FEATURE A
LOGGER OTHER THAN THE DT2350 TO ILLUSTRATE THE INSTRUCTIONS.
1Loosen the cable glands using two 20 mm wrenches. For each gland, hold the
bolt in place with one wrench. Loosen the cap with the other wrench. Refer to
Figure 3-1 for proper wrench placement.
Alternatively, the cable gland nut wrench may be used. Refer to Figure 3-2 for the
cable gland nut wrench placement.
CAUTION: ENSURE THE ENTIRE NUT BODY DOES NOT LOOSEN.LOOSEN ONLY THE
GLAND.
FIGURE 3-1 LOOSEN THE CABLE GLAND USING TWO 20 MM WRENCHES

DT2350 2-Channel Strain Gauge
Load Cell Data Logger Manual
ELM0099A
RST Instruments Ltd.
Page 4
FIGURE 3-2 LOOSEN THE CABLE GLAND USING THE CABLE GLAND NUT WRENCH
2Remove the black cable plug from the cable gland. Refer to Figure 3-3.
FIGURE 3-3 REMOVE THE CABLE PLUG FROM THE CABLE GLAND
3Loosen the 4 Phillips screws on the top of the logger. Lift the cover off.
4Insert the sensor cable with stripped wire ends through the cable glands and into
the logger. Ensure the cable sheathes are inside the enclosure.
5Connect the leads. Refer to Figure 3-4 and Table 3-1.

DT2350 2-Channel Strain Gauge
Load Cell Data Logger Manual
ELM0099A
RST Instruments Ltd.
Page 5
FIGURE 3-4 DT2350 SENSOR CONNECTIONS
NOTE: IGNORE PS+ AND PS-TERMINALS WHEN CONNECTING THE 4-WIRE
SENSORS.
TABLE 3-1 WIRING CHART FOR 4- AND 6-PIN CONNECTORS
4 Pin Connector
Wires
6 Pin Connector
A
P+
Red
A
P+
B
S+
Green
B
S+
C
S-
White
C
S-
D
P-
Black
D
P-
➔P-
E
PS-
➔P+
F
PS+
6Secure the wires to the logger circuit by tightening each wire with a 2.5 mm flat-
blade screwdriver.

DT2350 2-Channel Strain Gauge
Load Cell Data Logger Manual
ELM0099A
RST Instruments Ltd.
Page 6
CAUTION:ENSURE NO BARE WIRES ARE VISIBLE.
7Tighten the cable gland using the same method as described in step 1. See
Figure 3-5. Tug gently on the cable after each half turn to inspect cable mobility.
8Perform a final half turn once the cable is immobile. Do not overtighten or under
tighten.
CAUTION:
OVERTIGHTENING THE CABLE GLAND COULD DAMAGE THE CABLE.
UNDER TIGHTENING THE CABLE GLAND COULD CAUSE A LEAKAGE AND WATER
DAMAGE.
FIGURE 3-5 TIGHTEN THE CABLE GLAND
9For a stand-alone data logger, insert the battery into the battery adapter (see
Section 6.1 for information regarding the types of batteries suitable for this
logger). Place the adapter into the battery holder.
For radio-enabled loggers, place the battery into the battery holder. Roll the
battery back and forth to clean the contacts.
If the batteries are already installed, hold the battery in place and pull the tab out
to activate the logger. Refer to Figure 3-6.

DT2350 2-Channel Strain Gauge
Load Cell Data Logger Manual
ELM0099A
RST Instruments Ltd.
Page 7
FIGURE 3-6 ACTIVATE THE BATTERY
10 Replace the cover. Loosely tighten each screw in the X pattern as shown in
Figure 3-7. Then securely tighten each screw in the X pattern.
FIGURE 3-7 TIGHTEN SCREWS IN THE FOLLOWING ORDER AND PATTERN
CAUTION:ENSURE THE DT LOGGER HOST SOFTWARE AND USB DRIVERS ARE
INSTALLED BEFORE PROCEEDING FURTHER.
11 Unscrew the cover of the mini-B USB port. Refer to Figure 3-8.
FIGURE 3-8 MINI-B USB PORT

DT2350 2-Channel Strain Gauge
Load Cell Data Logger Manual
ELM0099A
RST Instruments Ltd.
Page 8
12 Connect the supplied USB connector cable to the DT2350 data logger and
computer’s USB port.
13 Launch the DT Logger Host software. Wait for the port and status indicator to
turn green. Refer to Figure 3-9. Refer to Section 5 if the indicators do not turn
green.
FIGURE 3-9 PORT AND STATUS INDICATORS
The DT2350 is now ready to be configured for data logging.
4 LOGGER CONFIGURATION
The following sections detail how to correctly configure the DT2350 for data logging.
It is important to ensure the logger is properly configured before beginning data
collection.
4.1 LOGGING TAB
Configure the logger in the Logging Tab prior to data collection.
Refer to Figure 4-1 and Table 4-1 for Logging settings and descriptions.
NOTE: SOME LOGGER CONFIGURATION PARAMETERS WILL BE CONTROLLED BY THE
RTU BASE STATION WHEN THE LOGGER IS IN RSTAR ENABLED MODE.ANY
SUCH PARAMETERS WILL BE INACCESSIBLE BY THE DT LOGGER HOST
SOFTWARE.

DT2350 2-Channel Strain Gauge
Load Cell Data Logger Manual
ELM0099A
RST Instruments Ltd.
Page 9
CAUTION: DATA LOSS WARNING
ENSURE THE DATA HAS BEEN DOWNLOADED PRIOR TO APPLYING SETTINGS.ALL
EXISTING LOGGER DATA WILL BE ERASED DURING LOGGER SETTINGS UPLOAD.
FIGURE 4-1 THE LOGGING TAB

DT2350 2-Channel Strain Gauge
Load Cell Data Logger Manual
ELM0099A
RST Instruments Ltd.
Page 10
TABLE 4-1 LOGGING TAB OPTIONS AND DESCRIPTION
Setting
Application
A
Interval
Select 'Use Fixed Interval' to adjust the intervals and set the logging frequency.
Select 'Use Multi Interval Table' and click on ‘Multi Interval’ to set up to 12 custom, multiple
logging frequencies.
Note: The hour, minute, second, and number of iterations per interval must be specified.
Each interval MUST have an iteration except the last iteration which must be set to zero.
This tells the program that the logger will continue at the last iteration rate.
B
Logger Options
(24 Hour Time)
Check 'Use Start Time' to select the desired logging start time (24-hour format).
Note: The logger will not start until it reaches the custom start time even if the time has
already passed. E.g., if the current time is 13:01 and the start time is set to 13:00, the
logger will not start logging data until 13:00 the next day. The status will read Log Pending
until the custom start time is reached.
Select 'Wrap on Memory Full (Overwrite Data)' to overwrite the logger memory when
logger memory is full.
Select 'Stop Logging when Memory Full' to stop collecting data when logger memory is
full. This option is recommended for locations with access issues where data may not be
retrieved prior to battery failure.
C
Clock Options
Select a custom date and time or click 'Sync to computer date/time' to sync it to the
computer’s current date and time.
Select 'Auto sync date/time' to always sync to the computer’s date/time when connected
via USB.
D
Logger Label
Type a custom name for the logger. Click 'Update Label' to apply the label.
This name will appear in the data files.
E
Apply Settings
Click 'Apply Settings' to save any changes and upload them to logger memory. 'Apply
Settings' must be clicked to ensure settings are saved.
CAUTION: DATA LOSS WARNING
ALL EXISTING LOGGER DATA WILL BE ERASED DURING LOGGER SETTINGS
UPLOAD.ENSURE THE DATA HAS BEEN DOWNLOADED PRIOR TO APPLYING
SETTINGS.SENSOR CONFIGURATION WILL NOT BE AFFECTED.
Clicking ‘Apply Settings’ will display a prompt reminding the user to download
existing logger data.
Only click ‘yes’ if the data has already been downloaded. Click ‘no’ to return to the
Logging Tab.
4.2 STATUS TAB
View general information about the currently connected DT2350 data logger (such
as logger information, logger status, battery life, and current memory usage) in the
Status Tab (Figure 4-2).

DT2350 2-Channel Strain Gauge
Load Cell Data Logger Manual
ELM0099A
RST Instruments Ltd.
Page 11
FIGURE 4-2 THE STATUS TAB
Ensure the serial number displayed matches the logger serial number.
Click 'Collect Data' to download the data into a *.csv file. A prompt will appear
asking to append or overwrite data. Append will continue to add data to existing
readings in the memory. Overwrite data will erase all data in the logger and restart
the logging process.
4.3 DATA VIEW TAB
The Data View tab provides a quick preview of the logger’s data files (Figure 4-3).
NOTE: DATA VIEW DISPLAYS MAJOR DATA LOGGER SETTINGS AND ALL SAVED DATA
RECORDS.USE A TEXT FILE VIEWER OR SPREADSHEET PROGRAM (E.G.
MICROSOFT EXCEL™)TO VIEW THE ENTIRE FILE.

DT2350 2-Channel Strain Gauge
Load Cell Data Logger Manual
ELM0099A
RST Instruments Ltd.
Page 12
FIGURE 4-3 THE DATA VIEW TAB
4.4 MONITOR TAB
The following section details the features of the Monitor Tab (Figure 4-4).
FIGURE 4-4 THE MONITOR TAB

DT2350 2-Channel Strain Gauge
Load Cell Data Logger Manual
ELM0099A
RST Instruments Ltd.
Page 13
Set the data logger into monitor mode in the Monitor Tab. The screen reports in
mV/V and mm.
Click the check boxes to change the display to Engineering Units.
NOTE: ENGINEERING UNITS ARE ONLY AVAILABLE WHEN SENSOR CALIBRATION
DATA AND CONVERSION METHOD IS SET IN THE SENSORS TAB.
The sensor reading will update approximately every two seconds when successfully
connected to the data logger. A green indicator will flash each time a sensor data is
updated.
The program will display "----" in each Sensor Reading field until communication is
established with the data logger.
The program will display "RANGE_ERR" when the Sensor Reading is outside of
valid range.
4.4.1 Graphical Monitor
Click the 'Graph' button to invoke the data logger graphical monitor (Figure 4-5). The
graphical monitor displays the recently monitor readings in a Sensor Reading vs.
Time graph.
FIGURE 4-5 THE GRAPHICAL MONITOR
The graphical monitor will update approximately every two seconds when
successfully connected.

DT2350 2-Channel Strain Gauge
Load Cell Data Logger Manual
ELM0099A
RST Instruments Ltd.
Page 14
The real-time sensor reading is displayed below the graph window. The pre-set
default range is applied in Range mode. Uncheck 'Auto' to apply a custom range.
Minimum and maximum sensor reading values are automatically adjusted to display
the entire graph. Uncheck 'Auto' to apply custom values. The time range (x-axis) can
be adjusted between 1 –120 minutes.
Click the 'Settings' button to open the Graph Settings dialog and manipulate graph
properties such as line style, background color, and grid lines.
4.5 SENSOR TAB
The Sensors tab shows current sensor configurations (Figure 4-6). Readings are
reported in mV/V by default but can be adjusted from mV/V to Engineering Units, if
desired. Data required for the conversion to engineering units is found on the
calibration sheet provided by RST with each shipment. Contact RST if the
calibration sheet is missing from the shipment or you require a replacement.
FIGURE 4-6 SENSOR TAB
The DT2350 can be configured to read one or two sensors.
Refer to Table 4-2 for Sensors settings and descriptions.
CAUTION: DO NOT DISCONNECT THE LOGGER BEFORE EXITING THE SOFTWARE.

DT2350 2-Channel Strain Gauge
Load Cell Data Logger Manual
ELM0099A
RST Instruments Ltd.
Page 15
TABLE 4-2 SENSORS TAB OPTIONS AND DESCRIPTION
Setting
Application
Enable Engineering
Units
Click the checkbox to apply Engineering Units.
Linear Conversion
Method
Enter the Calibration Factor and Zero Reading from the supplied calibration sheet.
Range Input
An alternate way to calculate coefficient parameters given range values.
Units Conversion
Units Type: Select unit type from drop-down menu.
Input Units: Select the calibration unit corresponding to the calibration sheet.
Output Units: Select desired output units from drop-down list.
Output Offset: User-defined offset value of pressure transducer elevation.
Display Format
Click to customize monitor display settings.
Upload to Logger
Click to update logger with current sensor settings.
Note: 'Upload to Logger' must be clicked to update logger with new settings.
CAUTION: DATA LOSS WARNING
THE PROGRAM WILL PROMPT THE USER TO RESTART LOGGING OR ERASE DATA
CURRENTLY CONTAINED IN THE LOGGER.CURRENT READINGS AND ALL PREVIOUS
DATA WITH CURRENT SENSOR CALIBRATION SETTINGS WILL BE
DOWNLOADED TO A *.CSV FILE NEXT TIME DATA IS COLLECTED IF THE LOGGER
MEMORY IS NOT ERASED.
Load from File
Click to load previously saved sensor settings.
Save to File
Click to save current sensor settings to file for later retrieval.
4.6 CONNECTIONS TAB
The connections tab can be used to access logger settings and advanced features.
Advanced features should be used only with the assistance of RST Instruments
technical personnel. Contact RST for more information.

DT2350 2-Channel Strain Gauge
Load Cell Data Logger Manual
ELM0099A
RST Instruments Ltd.
Page 16
TABLE 4-3 CONNECTIONS TAB OPTIONS AND DESCRIPTION
Problem
Solution
Browse
Click to change the *.csv save folder location.
Open Folder
Click to open the *.csv save folder location.
Wireless Settings
Click to select RSTAR or DT Link mode.
Wireless Loggers
Click to display list of Wireless Loggers.
▼Options
Click to access advanced features.
Logger Options
Click to enable Fahrenheit temperature units.
Advanced
Click to access advanced features. Advanced features should
be used only with the assistance of RST Instruments technical
personnel.
Default Settings
Click to revert logger settings back to default.
Admin Password
Click to change logger password.
Update Check
Click to check for software update.
Update Options
Click to adjust software update frequency and downloads folder
location.
5 TROUBLESHOOTING
Press F1 or click the help button to activate the help system. Answers to common
problems and troubleshooting tips may be found by browsing help topics or by
searching keywords.
TABLE 5-1 COMMON TROUBLESHOOTING PROBLEMS AND SOLUTIONS
Problem
Solution
Failed Drivers Installation
Manual installation of the USB drivers:
Start Menu > RST Instruments > DT Logger Host > Tools >
Install USB Drivers
Status Message:
Port Not Open
Close other windows applications.
Select the correct logger using logger mode buttons.
Status Message: Connecting
to the logger
Verify that the communication cable is tightly connected.
Replace logger batteries.
Reading Errors
Close and restart Multichannel DT Logger Host Software.
Transmission Error
Check the battery state on the Status tab. Drained battery may
cause data transmission errors.
Damaged USB port cover
Contact RST for a replacement cap.
Battery voltage below 3V
Contact RST for replacement batteries. Do not replace the
battery with an alkaline or zinc-carbon battery.