RST DT2350 User manual

RST INSTRUMENTS LTD.
11545 Kingston St.,
Maple Ridge, BC
CANADA V2X 0Z5
SALES + SERVICE + MANUFACTURING:
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TOLL FREE (USA & Canada) |1-800-665-5599
www.rstinstruments.com
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.