Accsence VersaLog User manual

User’s Manual
Accsense VersaLog
12628 Chillicothe Rd., Unit J
Chesterland, Ohio 44026
Toll Free:
800-956-4437
www.dataloggerinc.com
Multi-Channel Data Loggers
VersaLog
12628 Chillicothe Rd., Unit J
Chesterland, Ohio 44026
Phone: 440-729-2570
Toll Free: 800-956-4437
Fax: 440-729-2586
Email: support@dataloggerinc.com
Web: http://www.dataloggerinc.com

Accsense VersaLog Data Loggers User’s ManualPage 1
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This manual contains operational information for Accsense VersaLog Data Loggers. Please read
this manual before using the data loggers.
Limits of Liability and Disclaimer of Warranty:
The manual contained in this document is furnished for informational use only and is subject to
change without notice.
Accsense VersaLog shall not be liable for errors contained herein or for incidental or
consequential damages in connection with the furnishing, performance, or use of this material.
Copyright and Trademarks
This manual contains proprietary information which is protected by copyright. All rights are
reserved. No part of this document may be photocopied, reproduced, or translated to another
language without prior written consent of Accsense VersaLog.
Accsense and VersaLog are the trademarks of Accsense VersaLog.
All other trademarks and registered trademarks are the property of their respective owners.
Accsense VersaLog
12628 Chillicothe Rd., Unit J
Chesterland, Ohio 44026
Toll Free: 800-956-4437
Web-Site: http://www.dataloggerinc.com
Rev 2.4 For Accsense Site View 3.3.4. Feb. 2018

Accsense VersaLog Data Loggers User’s ManualPage 2
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Accsense VersaLog and the Buyer agree to the following terms and conditions of Sale and Purchase:
1. Limited Warranty.
ACCSENSE VERSALOG warrants its product(s) to be free from defects in materials and workmanship for a period of one
year from the date of registered purchase. Any unit which is found to be defective will, at the discretion of ACCSENSE
VERSALOG, be repaired or replaced.
ACCSENSE VERSALOG will not be responsible for the repair or replacement of any unit damaged by user modification,
negligence, abuse, improper installation, or mishandling.
ACCSENSE VERSALOG reserves the right to alter any feature or specification at any time.
2. Limitation of Liability.
The product must NOT be used in applications where failure of the product could lead to physical harm or loss of human life.
Buyer is responsible to conduct their own tests to meet the safety regulation of their respective industry.
IN NO EVENT WILL ACCSENSE VERSALOG BE LIABLE TO ANY PARTY FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, CONSEQUENTIAL OR PUNITIVE DAMAGES FOR USE OF THE PRODUCT, INCLUDING,
WITHOUT LIMITATION, LOST PROFITS OR REVENUES, COSTS OF REPLACEMENT, BUSINESS
INTERRUPTIONS, LOSS OF DATA OR DAMAGES RESULTING FROM USE OF OR RELIANCE ON THE PRODUCT,
EVEN IF ACCSENSE VERSALOG IS EXPRESSLY ADVISED ABOUT THE POSSIBILITY OF SUCH DAMAGES.
3. Extended Warranty.
Extended 2-year warranty service is available to purchase on new products at time of order entry and up to ninety days
thereafter. The extended warranty protects you from unbudgeted service expenses and provide additional 2 years of protection
at a fraction of the price of a repair.
4. Return Policy.
Defective Product Return:
A Buyer may return a defective product to ACCSENSE VERSALOG for repair or replacement, at ACCSENSE VERSALOG
option, in the event ACCSENSE VERSALOG determines that the product is defective. The defective product must be returned
to ACCSENSE VERSALOG within the warranty period. The Buyer shall be responsible for all shipping costs. Repaired or
replaced products are warranted for the balance of the original warranty period, or at least 90 days.
Non-defective Product Return:
Products that are not defective may be returned to ACCSENSE VERSALOG within 30 days from the date of shipment. All
non-defective product returns are subject to a 20% restocking fee. If the product is unsatisfactory for the application for which
it was purchased, ACCSENSE VERSALOG shall, at its option, either refund the purchase price paid by the Buyer or replace
the product with one that is satisfactory for the application. The Buyer shall be responsible for all shipping costs and restocking
fee determined by ACCSENSE VERSALOG.
Method of Return:
Prior to returning the product, completely fill out the RMA Application Form, send it to ACCSENSE VERSALOG or contact
ACCSENSE VERSALOG directly for a Return Material Authorization number. All products returned to ACCSENSE
VERSALOG must be securely packaged in the original shipping materials and reach ACCSENSE VERSALOG without
damage and shipped in accordance with Applicable laws, rules, and regulations. The products must contain all software and
accessories that were shipped to the Buyer in connection with the product.
5. ACCSENSE VERSALOG reserves the right to alter any feature or specification at any time.
Notes to Buyer:
If you disagree with any of the above terms or conditions you should promptly return the unit to the
manufacturer or distributor within 30 days from date of purchase.

Accsense VersaLog Data Loggers User’s ManualPage 3
TABLE OF CONTENTS
ABOUT THIS MANUAL................................................................................................................ 1
LIMITS OF LIABILITY AND DISCLAIMER OF WARRANTY: ................................................................ 1
COPYRIGHT AND TRADEMARKS ...................................................................................................... 1
1. INTRODUCTION........................................................................................................................ 6
1.1 FEATURES OF THE LOGGER........................................................................................................ 6
1.2 APPROVALS............................................................................................................................... 6
1.3 CARE OF THE LOGGER ............................................................................................................... 7
1.4 IDENTITY OF THE LOGGER ......................................................................................................... 7
1.5 BATTERY................................................................................................................................... 7
1.6 RECALIBRATION........................................................................................................................ 8
1.7 SAFETY WARNING .................................................................................................................... 8
Maximum Input Voltage Range ................................................................................................. 8
Maximum Input Current Range................................................................................................. 8
External Power Supply .............................................................................................................. 8
Grounding.................................................................................................................................. 8
2. HARDWARE & MECHANICAL DIMENSION..................................................................... 9
Logger Diagram:....................................................................................................................... 9
3. CHANNELS AND SENSOR CONNECTIONS...................................................................... 10
VL-DCV-2 –VOLTAGE INPUTS,PROGRAMMABLE RANGE .......................................................... 10
Channel and Sensor Specifications: ........................................................................................ 11
VL-DCC-HR –CURRENT INPUTS................................................................................................. 11
Channel and Sensor Specifications: ........................................................................................ 12
VL-DCVC-HR –VOLTAGE &CURRENT INPUTS,RANGE PROGRAMMABLE ................................ 12
Channel and Sensor Specifications: ........................................................................................ 13
VL-DCVC –VOLTAGE &CURRENT INPUTS,RANGE PROGRAMMABLE ....................................... 13
Channel and Sensor Specifications: ........................................................................................ 14
VL-TC –THERMOCOUPLE INPUTS,RANGE PROGRAMMABLE....................................................... 14
Channel and Sensor Specifications: ........................................................................................ 15
Measure Temperature:............................................................................................................. 15
VL-TH –THERMISTOR /RESISTOR INPUTS................................................................................... 16
Channel and Sensor Specifications: ........................................................................................ 17
Measure Resistance:................................................................................................................ 17
Measure Temperature:............................................................................................................. 17
VL-BR-- EXCITATION/SENSE INPUT, VOLTAGE INPUT, FIXED RANGE....................... 20
What is a Strain Gauge............................................................................................................ 21
Quarter Bridge Circuit:........................................................................................................... 21
Half Bridge Circuit:................................................................................................................. 21
Full Bridge Circuit: ................................................................................................................. 22
Connect Strain Gauge to a Data Logger................................................................................. 22
Channel and Sensor Specifications: ........................................................................................ 25

Accsense VersaLog Data Loggers User’s ManualPage 4
VL-P –STATE/EVENT/PULSE INPUTS,RANGE PROGRAMMABLE .................................................. 25
VL-RTD-1 (FOR PT100) .............................................................................................................. 27
Channel and Sensor Specifications: ........................................................................................ 28
Choose Right Equation for RTD Sensors:............................................................................... 28
4 BASIC FUNCTIONS.................................................................................................................. 29
BUILT-IN EQUATIONS ................................................................................................................... 29
MEASURING &LOGGING .............................................................................................................. 30
Start Time: ............................................................................................................................... 30
End Time:................................................................................................................................. 31
Sampling Interval: ................................................................................................................... 31
Logging Mode:......................................................................................................................... 31
DOWNLOADING DATA .................................................................................................................. 31
FIELD ACTIVATION ....................................................................................................................... 31
STATUS LED................................................................................................................................. 33
ALARM1&A2/EXT TERMINALS.................................................................................................. 33
ALARM OUTPUT............................................................................................................................ 34
EXCITATION OUTPUT.................................................................................................................... 36
5. SOFTWARE............................................................................................................................... 37
SYSTEM REQUIREMENTS............................................................................................................... 37
COMMUNICATIONS INTERFACES ................................................................................................... 37
INSTALL ACCSENSE VERSALOG.................................................................................................... 39
INSTALL USB DRIVER .................................................................................................................. 44
CONNECT DATA LOGGER.............................................................................................................. 45
ACTIVATE ACCSENSE VERSALOG................................................................................................. 48
MAIN WINDOW FRAME................................................................................................................. 50
Communication Panel.............................................................................................................. 50
Menu Bar ................................................................................................................................. 50
Tool Bar................................................................................................................................... 50
Main Working Panel................................................................................................................ 50
Information Log Panel............................................................................................................. 51
VIEW LOGGER STATUS ................................................................................................................. 51
General .................................................................................................................................... 52
Alarm & Excitation.................................................................................................................. 52
CONFIGURE LOGGER..................................................................................................................... 53
Description: ............................................................................................................................. 54
Sampling Interval: ................................................................................................................... 54
On-Board LED......................................................................................................................... 54
When Memory Full .................................................................................................................. 54
Time to Start & Time to End.................................................................................................... 55
Total Time Span....................................................................................................................... 55
Enabled.................................................................................................................................... 55
Channel Range......................................................................................................................... 55
Description............................................................................................................................... 55
Equation................................................................................................................................... 55
Cali. Low & Cali. High............................................................................................................ 56

Accsense VersaLog Data Loggers User’s ManualPage 5
Alarm/Excitation Selection ...................................................................................................... 56
Alarm-On Delay....................................................................................................................... 56
Excitation Warm-up Delay ...................................................................................................... 57
Channel Alarm Settings ........................................................................................................... 57
DOWNLOAD LOGGER .................................................................................................................... 58
Filename & Browse ................................................................................................................. 59
Start Time & End Time ............................................................................................................ 59
REAL-TIME DISPLAY .................................................................................................................... 60
Show List.................................................................................................................................. 62
Show Graph ............................................................................................................................. 62
Vertical..................................................................................................................................... 62
Time Span................................................................................................................................. 62
Dataset..................................................................................................................................... 62
Settings..................................................................................................................................... 63
CALIBRATE A CHANNEL................................................................................................................ 63
Understand Cali. Low & Cali. High........................................................................................ 63
Decide On-Line or Off-Line Calibration................................................................................. 64
6. SPECIFICATIONS.................................................................................................................... 68
COMMON SPECIFICATIONS............................................................................................................ 68
LOGGING CAPACITY ..................................................................................................................... 69

Accsense VersaLog Data Loggers User’s ManualPage 6
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1.1 Features of the logger
Congratulations on purchasing the Accsense VersaLog series data loggers! These portable
battery powered data loggers allow recording information and saving measurements to a 4MB
flash memory for later retrieval.
The internal lithium battery provides up to 10 years of instantaneous logging operation when
sampling at interval of one minute.
Accsense VersaLog data logger can be manipulated by VersaLog SiteView Windows software
for data downloading, logging management, and property configuration. It has both TTL-
compatible serial port and USB interface for different communications requirements.
Accsense VersaLog data loggers feature a wide sampling interval range from 20 milliseconds to
12 hours, providing an alternative to data acquisition devices and paper chart recorders.
Accsense VersaLog data loggers provide alarm outputs controlled by the low and high
programmable alarm thresholds of each enabled channel. The alarm control outputs can be used
to turn on/off external alarm devices such as strobe lights, sirens or alarm telephone diallers.
Accsense VersaLog data loggers also have an excitation control output used to switch the power
supply of the external transducer/transmitter.
Accsense VersaLog data loggers contain one internal thermistor channel, and seven external
process signal channels. The 16-bit analog-to-digital converter makes the measurements more
precise and accurate.
Accsense VersaLog data loggers also have a rugged, splash-resistant aluminum enclosure, and
internal electronics are protected against moisture ingress by conformal coating.
1.2 Approvals
All Accsense VersaLog Series data loggers are in conformity with the EN standard(s) listed
below:
EN 61000-6-2:[2005]
General standards –Immunity for industrial environments

Accsense VersaLog Data Loggers User’s ManualPage 7
EN 61000-6-3:[2007]
General standards –Emission standard for residential, commercial and light-
industrial environments
following the provisions of the following directive(s)
2004/108/EC Electromagnetic compatibility (EMC)
All Accsense VersaLog Series data loggers comply with Part15 of the FCC Rules. Operation is
subject to the following two conditions:
1. These devices may not cause harmful interference, and
2. These devices must accept any interference received, including interference that may cause
undesired operation.
1.3 Care of the logger
Although the Accsense VersaLog data loggers are weather resistant, the loggers are designed to
work in humid atmospheres of up to 95% RH non-condensing. They should be protected
against immersion. The environment temperature should be within –40 to +70°C (-40 to +
158°F).
1.4 Identity of the logger
Each logger has its own unique serial number, which can be found on the back of the enclosure.
The serial number is used to identify the logger and enable us to keep a record of its history like
calibrations and warranty. Please reference it in any correspondence with ACCSENSE
VERSALOG.
1.5 Battery
The battery lasts in excess of 10 years when sampling at 1-minute intervals. When the battery is
nearing the end of its service life, the on-board status LED will glow in amber each time the
logger is sampling the data. The battery indicator on the status window in VersaLog SiteView
software will also display warning of low battery level. The battery operates approximately one
or two weeks from the time the logger first indicates a low battery, but we recommend that the
battery be changed as soon as the warning is displayed. The battery is factory replaceable only.

Accsense VersaLog Data Loggers User’s ManualPage 8
1.6 Recalibration
Any Accsense VersaLog data logger is supplied with all channels pre-calibrated and should not
require any further recalibration for a period of 12 months.
We recommend the logger be recalibrated every year. You may recalibrate the logger longer
than a year depending on your application standard.
You may return the logger to the supplier for recalibration service or recalibrate it on your own
via VersaLog SiteView software.
VersaLog SiteView software provides two-point calibration for the most of the loggers.
1.7 Safety Warning
Maximum Input Voltage Range
For logger model: VL-DCV-2, VL-DCVC-HR, VL-TH, VL-TC:
The logger is designed to measure single common ground DC voltages in the range up to 20
VDC. Any voltages over this range may cause permanent damage to the device.
Maximum Input Current Range
For logger model: VL-DCC-HR, VL-DCVC-HR:
The logger is designed to measure single common ground DC current in the range up to 50
mA. Any current over this range may cause permanent damage to the device.
External Power Supply
When using external power supply (via USB, Serial Port, Device Server, or thirty party +5
VDC power supply) to power the logger please make sure that the external power supply has
the same common ground with the external input process signals.
When using other third party external power supplies, please make sure the voltage of the
external power supply is +5 VDC (+/- 5% ripple).
Grounding
The common ground of the Accsense VersaLog data logger is connected directly to the
ground of the input process signals and the ground of the external power supply (if
applicable).

Accsense VersaLog Data Loggers User’s ManualPage 9
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Logger Diagram:
For Model VL-DCV-2, VL-DCC-HR, VL-DCVC-HR, VL-TC, VL-TH:

Accsense VersaLog Data Loggers User’s ManualPage 10
Dimension: 88 X 64.2 X 24 MM
3.46 X 2.53 X 0.95 Inches
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All Accsense VersaLog data loggers have one on-board thermistor located beside the status
LED.
All “COM” terminals are connected together and should be connected to the common ground of
the process signals.
VL-DCV-2 –Voltage Inputs, Programmable Range
Besides the on-board thermistor channel, the VL-DCV-2 logger has seven external voltage DC
channels used to measure single-ended voltage DC signals maximum of 20 volt. The following
figure illustrates the correct input connections:

Accsense VersaLog Data Loggers User’s ManualPage 11
CH1
A2/E
A1
COM
CH7
CH6
COM
CH5
CH4
COM
CH3
CH2
COMTransducer #1
VDC
GND
Transducer #2
VDC
GND
Voltage External Input Connections
Note: All inputs must share the same common ground.
Channel and Sensor Specifications:
Connections
Pluggable terminal block for 7 external channels, excitation
controls and alarm outputs.
Channels
One on board thermistor temperature (-40C ~ 70C, -40F ~
158F).
Seven external Voltage DC.
Software programmable input range selections for each channel:
0 ~ 20 V, -5 ~ +5 V
Resolution
0.0018%
Accuracy
Thermistor channel: +/-0.2C (0c ~ 70C, 32F ~ 158F)
+/-0.05% FSR @ 25C
Input Impedance
> 1 MOhms
Over-voltage protection
+/- 40 VDC
VL-DCC-HR –Current Inputs
Besides the on-board thermistor channel, VL-DCC-HR logger has seven external current DC
channels used to measure single-ended current DC signals maximum of 20 mA. The following
figure illustrates the correct input connections:

Accsense VersaLog Data Loggers User’s ManualPage 12
CH1
A2/E
A1
COM
CH7
CH6
COM
CH5
CH4
COM
CH3
CH2
COM
Transducer #2
Current DC
GND
Transducer #1
Current DC
GND
Current External Input Connections
Note: All inputs must share the same common ground.
Channel and Sensor Specifications:
Connections
Pluggable terminal block for seven external channels, excitation
controls and alarm outputs
Channels
One on-board thermistor temperature (-40°C ~ 70°C, -40°F ~
158°F).
Seven external Current DC inputs: 0 ~ 20 mA
Resolution
0.0018%
Accuracy
Thermistor channel: +/- 0.2°C(0°C ~ 70°C, 32°F ~ 158°F)
Current channels: +/- 0.1% FSR @ 25°C
Load Resistor
12 Ohms
Over-current protection
+/- 100 mA
VL-DCVC-HR –Voltage & Current Inputs, Range Programmable
Besides the on-board thermistor channel, the VL-DCVC-HR logger has seven external voltage
and current channels. The first four external channels are used to measure single-ended voltage
maximum of 20 VDC and the remaining three external channels are used to measure single-
ended current DC signals maximum of 20 mA. The following figure illustrates the correct input
connections:

Accsense VersaLog Data Loggers User’s ManualPage 13
CH1
A2/E
A1
COM
CH7
CH6
COM
CH5
CH4
COM
CH3
CH2
COMTransducer #1
VDC
GND
Transducer #2
VDC
GND
Transducer #3
Current DC
GND
Voltage and Current External Input Connections
Note: All inputs must share the same common ground.
Channel and Sensor Specifications:
Channels
CH1 ~ CH4 (voltage): programmable range for each channel:
0 ~ 20 V, 0 ~ 2 V.
CH5 ~ CH7 (current) programmable range for each channel:
0 ~ 20 mA.
Accuracy
Reference Temperature : 0.36°F
Voltage channels:
+/- 0.05% FSR @ 25°C for 20V channels
+/- 0.1% FSR @ 25°C for 2V channels
Current channels:
+/- 0.15% FSR @ 25°C
Load Resistor
For current channel: 12 Ohms
Protection
Voltage channel: +/- 40 VDC
Current channel: +/-100 mA
VL-DCVC –Voltage & Current Inputs, Range Programmable
Besides the on-board thermistor channel, the VL-DCVC logger has seven external voltage and
current channels. The first four external channels are used to measure single-ended voltage
maximum of 20 VDC and the remaining three external channels are used to measure single-

Accsense VersaLog Data Loggers User’s ManualPage 14
ended current DC signals maximum of 20 mA. The following figure illustrates the correct input
connections:
CH1
A2/E
A1
COM
CH7
CH6
COM
CH5
CH4
COM
CH3
CH2
COMTransducer #1
VDC
GND
Transducer #2
VDC
GND
Transducer #3
Current DC
GND
Voltage and Current External Input Connections
Note: All inputs must share the same common ground.
Channel and Sensor Specifications:
Channels
CH1 ~ CH4 (voltage): programmable range for each channel:
0 ~ 20 V, 0 ~ 2 V.
CH5 ~ CH7 (current) programmable range for each channel:
0 ~ 20 mA.
Accuracy
Reference Temperature : 0.36°F
Voltage channels:
+/- 0.15% FSR @ 25°C from 0.1 V and up
+/- 0.5% FSR @ 25°C from 0 to 0.1 V
Current channels:
+/- 0.15% FSR @ 25°C from 2.5 mA and up
+/- 0.5% FSR @ 25°C from 0 to 2.5 mA
Load Resistor
For current channel: 12 Ohms
Protection
Voltage channel: -3VDC - 40 VDC
Current channel: +/-100 mA
VL-TC –Thermocouple Inputs, Range Programmable

Accsense VersaLog Data Loggers User’s ManualPage 15
Besides the on-board thermistor channel, the VL-TC logger has seven external voltage DC
channels used to measure thermocouple probes or small voltage signals. The following figure
illustrates the correct input connections:
CH1
A2/E
A1
COM
CH7
CH6
COM
CH5
CH4
COM
CH3
CH2
COM
+
-
+
-
Thermocouple Probe
Thermocouple Input Connections
Note: All inputs must share the same common ground.
Channel and Sensor Specifications:
Channels
One on-board thermistor reference temperature ( -40°F ~
158°F).
Seven external thermocouple inputs.
Type: E, N, J, K, T
Software programmable input range selections for each
channel
Accuracy
Reference Temperature : 0.36°F Thermocouple Inputs: +/-
0.2% + T/C Accuracy @ 25°C
Over-voltage protection
+/- 40 VDC
Measure Temperature:
Based on the thermocouple type you want to use and the desired temperature range you want
to measure you can select one of four channel’s available ranges and the correct factory
thermocouple equation:

Accsense VersaLog Data Loggers User’s ManualPage 16
For detailed temperature range and voltage –temperature look-up table of a specific
thermocouple type please refer to NIST’s website at:
http://srdata.nist.gov/its90/download/download.html
VL-TH –Thermistor / Resistor Inputs
Besides the on-board thermistor channel, the VL-TH logger has seven external channels used to
measure the external thermistors or resistors. The following figure illustrates the correct input
connections:
CH1
A2/E
A1
COM
CH7
CH6
COM
CH5
CH4
COM
CH3
CH2
COM
Thermistor
Thermistor External Input Connections
Note: All inputs must share the same common ground.

Accsense VersaLog Data Loggers User’s ManualPage 17
Channel and Sensor Specifications:
Connections
Pluggable terminal block for
seven external channels,
excitation controls and alarm
outputs.
Channels
One on-board thermistor
temperature (-40°C ~ 70°C, -40°F
~ 158°F).
Seven external thermistor
channels for 10K thermistors
Accuracy
Internal thermistor channel: +/-
0.2°C(0°C ~ 70°C, 32°F ~ 158°F)
External thermistor channels:
+/- 0.2% FSR @ 25°
Measure Resistance:
Accsense VersaLog provides factory resistance equation for measuring the resistor’s value.
Based on the range you want to measure you can select either >8 Kohms, between 2 and 8
Kohms or from zero to 2 Kohms. In Configuration dialog:
Change Channel Type/Input Range to the one best fits your measuring range.
Once you selected the right range you choose Resistance equation:
Measure Temperature:
To measure temperature of an external thermistor, you need to change the channel type to
External Thermistor:

Accsense VersaLog Data Loggers User’s ManualPage 18
The simple way to measure temperature is by using built-in “Temperature” equation. You
select “Temperature” in “Equation” column:
Then you need to change temperature coefficient values by clicking “Change Coefficients”
button in “Action” column:
In the pop-up dialog enter new temperature coefficient values and click “OK” button.

Accsense VersaLog Data Loggers User’s ManualPage 19
You can also use a custom equation to do the same job or even more complicated
calculation. An example of external thermistor equation is included in the Accsense
VersaLog package. When you create your own equation you can refer to this equation and
replace those temperature coefficients with the ones obtained from the thermistor
manufacturer. The contents of the sample equation looks like this:
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