AEMC L452 User manual

DATA LOGGER
MODEL L452
ENGLISH User Manual
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Before using your Data Logger Model L452 for the rst time, please take a moment to review the following.
Signies that the instrument is protected by double or reinforced insulation.
CAUTION - Risk of Danger! Indicates a WARNING that the operator must refer to the User Manual for instructions before
operating the instrument in all cases where this symbol is marked.
Risk of electric shock. The voltage at the parts marked with this symbol may be dangerous.
Bluetooth enabled.
Ground/Earth.
Important instructions to read and understand completely.
Important information to acknowledge.
Battery.
Fuse.
USB socket.
Compliance with the Low Voltage & Electromagnetic Compatibility European directives (73/23/CEE & 89/336/CEE)
In the European Union, this product is subject to a separate collection system for recycling electrical and electronic compo-
nents in accordance with directive WEEE 2002/96/EC.
The product has been declared recyclable.
Denition of Measurement Categories (CAT)
■CAT II Measurements taken on circuits directly connected to low-voltage installations.
Example: power supply to domestic electrical appliances and portable tools.
■CAT III Measurements taken on building installations.
 Example:distributionpanel,circuit-breakers,machinesorxedindustrialdevices.
■CAT IV Measurements taken at the source of low-voltage installations.
 Example:powerfeeders,countersandprotectiondevices.
PRECAUTIONS FOR USE
These warnings are provided to ensure the safety of personnel. Please read and comply with these precautions.
■Do not use this instrument in an explosive atmosphere or in the presence of ammable gases.
■Observe the maximum voltages and intensities assigned between terminals and ground/earth.
■Do not use the instrument if it appears damaged, incomplete, or improperly closed.
■Before each use, check the condition of the insulation of cables, case, and accessories. Anything which appears damaged
(even partially) must be reported for repair or scrapping.
■Use only leads and accessories that meet instrument specications.
■Observe the environmental specications for the use of this instrument, as specied in § 7 of this User Manual.
■Do not modify the instrument. Use only original replacement parts. Repairs or adjustments must be performed by authorized
personnel.
■Replace the batteries when they can no longer hold a charge. Disconnect all cables from the instrument before opening the
access door to the batteries, as explained in § 8.1.3.
■Use protective equipment as required by the environment in which you are operating this instrument.
■When handling probes, probe tips, current sensors, signal conditioners, and alligator clips, keep ngers behind the guard.
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Data Logger Model L452 3
TABLE OF CONTENTS
1. INTRODUCTION............................................................................................................................... 6
1.1 Receiving Your Shipment ........................................................................................................................................6
1.2 Ordering Information ...............................................................................................................................................6
1.2.1 Accessories ..................................................................................................................................................6
1.2.2 Replacement Parts.......................................................................................................................................6
2. PRODUCT FEATURES..................................................................................................................... 7
2.1 Model L452 Features ..............................................................................................................................................7
2.2 Electrical Power.......................................................................................................................................................8
2.3 Using the Model L452 User Interface......................................................................................................................8
2.3.1 Model L452 Screens ....................................................................................................................................8
2.3.2 Front Panel Buttons ...................................................................................................................................10
2.3.3 Entering Text .............................................................................................................................................. 11
3. CONFIGURATION .......................................................................................................................... 12
3.1 Instrument Conguration .......................................................................................................................................12
3.1.1 Choosing the Language for the Interface...................................................................................................13
3.1.2 Setting the Instrument Date and Time........................................................................................................13
3.1.3 Enabling and Conguring Bluetooth...........................................................................................................14
3.2 Channel Conguration...........................................................................................................................................15
3.2.1 Enabling and Disabling Channels ..............................................................................................................16
3.2.2 Selecting the Input Type.............................................................................................................................16
3.2.2.1 Analog ................................................................................................................................................16
3.2.2.2 Pulse Count........................................................................................................................................16
3.2.2.3 Event..................................................................................................................................................16
3.2.3 Dening Units.............................................................................................................................................17
3.2.4 Selecting Low and High Scaling Factors....................................................................................................17
3.2.5 Enabling and Dening Alarm Triggers........................................................................................................19
3.2.6 Dening Equivalence (Pulse Input Only)....................................................................................................20
3.2.7 Selecting Event Trigger (Event Input Only) ................................................................................................20
3.3 Restoring Conguration to the Original Settings ...................................................................................................21
3.4 Viewing Instrument Information.............................................................................................................................21
3.4.1 Model, Serial Number, and Firmware Revision..........................................................................................22
3.4.2 Name and Location Screen........................................................................................................................22
3.4.3 Recording Session Screen.........................................................................................................................22
3.4.4 Recording Name Screen............................................................................................................................23
4. CONNECTING TO INPUTS AND VIEWING MEASUREMENTS ................................................... 24
4.1 Connecting Probes, Signal Conditioners, and Sensors .......................................................................................24
4.2 Viewing Measurement Data ..................................................................................................................................25
4.2.1 Analog Measurement Data.........................................................................................................................25
4.2.2 Pulse Count Measurement Data................................................................................................................27
4.2.3 Event Measurement Data ..........................................................................................................................27
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4 Data Logger Model L452
5. RECORDING DATA ........................................................................................................................ 29
5.1 Recording Session Overview ................................................................................................................................29
5.2 Recording Screens................................................................................................................................................29
5.3 Conguring a Recording Session..........................................................................................................................30
5.4 Starting a Recording Session................................................................................................................................31
5.5 Scheduling a Recording Session ..........................................................................................................................31
5.6 Stopping or Cancelling a Recording Session ........................................................................................................32
6. DATAVIEW®....................................................................................................................................................................................................................................... 34
6.1 Installing DataView................................................................................................................................................34
6.2 The Data Logger Control Panel.............................................................................................................................37
6.3 Connecting the Model L452 to the Computer........................................................................................................37
6.3.1 USB Connection.........................................................................................................................................38
6.3.2 Bluetooth Connection.................................................................................................................................38
7. SPECIFICATIONS.......................................................................................................................... 39
7.1 Reference Conditions............................................................................................................................................39
7.2 Electrical................................................................................................................................................................39
7.2.1 Input Types.................................................................................................................................................39
7.2.2 Power Supply.............................................................................................................................................39
7.3 Recording and Data Storage.................................................................................................................................40
7.4 Communication .....................................................................................................................................................40
7.5 Mechanical ............................................................................................................................................................40
7.6 Environmental .......................................................................................................................................................40
7.7 Safety ...................................................................................................................................................................40
8. MAINTENANCE AND TROUBLESHOOTING................................................................................ 41
8.1 Model L452 Maintenance ......................................................................................................................................41
8.1.1 Erasing Memory .........................................................................................................................................41
8.1.2 Upgrading to the Latest Firmware..............................................................................................................42
8.1.3 Installing and Replacing the Batteries........................................................................................................42
8.1.4 Cleaning the Instrument.............................................................................................................................43
8.2 Troubleshooting the Model L452 ...........................................................................................................................43
8.2.1 L452 Does Not Turn ON.............................................................................................................................43
8.2.2 L452 Turns ON But Does Not Function......................................................................................................43
8.2.3 Overload (OL) Icon is Displayed ................................................................................................................44
8.2.4 Cannot Congure the L452........................................................................................................................44
8.2.5 Cannot Congure a Recording Session.....................................................................................................44
8.2.6 Recording Sessions Do Not Start ..............................................................................................................44
8.2.7 Recording Sessions End Prematurely .......................................................................................................45
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Data Logger Model L452 5
8.2.8 Cannot Connect to a Computer .................................................................................................................45
8.2.9 Cannot Turn OFF the Model L452 .............................................................................................................45
APPENDIX A. USER INTERFACE SCREENS................................................................................... 46
A.1 Measurement Data Screens .................................................................................................................................47
A.2 Recording Screens ...............................................................................................................................................48
A.3 Channel 1 and Channel 2 Conguration Screens.................................................................................................49
A.4 Instrument Conguration Screens ........................................................................................................................52
A.5 Instrument Information Screens............................................................................................................................53
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6 Data Logger Model L452
1. INTRODUCTION
1.1 Receiving Your Shipment
Upon receiving your shipment, make sure that the contents are consistent with the packing list. Notify your distributor of any missing
items. If the equipment appears to be damaged, le a claim immediately with the carrier and notify your distributor at once, giving a
detailed description of any damage. Save the damaged packing container to substantiate your claim.
1.2 Ordering Information
Data Logger Model L452...................................................................................................................................................... Cat. #2153.51
Includes Data Logger Model L452, 6 ft USB cable, US 120V Wall-to-USB plug, 6-pin screw terminal block, 2 AA rechargeable NiMH bat-
teries, quick start guide, and a USB stick containing DataView®software and a user manual.
1.2.1 Accessories
Multix (Universal Mounting System) .................................................................................................................................... Cat. #5000.44
Small Carrying Pouch............................................................................................................................................................ Cat. #2154.71
Hard Carrying Case................................................................................................................................................................Cat. #2118.09
Wall Mount Holster (gray)...................................................................................................................................................... Cat. #2138.61
1.2.2 Replacement Parts
Cable – Replacement 6 ft USB.............................................................................................................................................. Cat. #2138.66
Adapter – Replacement US Wall-to-USB plug ..................................................................................................................... Cat. #2153.78
Screw Terminal Block (6-pin)................................................................................................................................................. Cat. #2153.77
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Data Logger Model L452 7
2. PRODUCT FEATURES
The AEMC Data Logger Model L452 is a two-channel data logger. The instrument is Bluetooth-enabled and records DC voltage, DC
current, pulse count, and event input. Typical applications include process control and measurement, utility metering, and environmental
monitoring.
Figure 1. Data Logger Model L452
2.1 Model L452 Features
The Model L452 combines the functionality of three earlier Simple Logger II products: the Model L322 (4 to 20mA logger), Model L432
(user-selectable ±100mV, ±1V, and ±10V logger), and Model L404 (event logger). Voltage and current measurements can be sampled
from 200ms to 1 minute; sampled quantities can be averaged (mean value) from 200ms to 1 hour and recorded.
Primary features include:
■Multiple data input types. The Model L452 can log DC voltage, DC current, pulse count, or event data, using either one or
two inputs. Measurements can be performed directly on the instrument through a variety of sources, such as sensors. This
data can be stored in the instrument’s 32MB internal memory.
■ User interface. You can set up the instrument and view measurement data through the front panel LCD screen and input
buttons. The L452 features an on-board interface for navigating measurement data and selecting conguration options.
■ DataView support. The instrument connects to a computer using either Bluetooth or USB. Once connected, recorded data
can be downloaded, analyzed, and formatted into reports using DataView’s Data Logger Control Panel. This Control Panel
also enables you to change settings on the instrument, view real-time measurements, schedule recording sessions, and
perform other conguration tasks.
The Model L452 includes two modes of operation:
■Local mode provides setup and measurement data display through the instrument’s LCD screen. In Local mode, you can
select conguration settings, start and stop a data recording session on the instrument, and view measurement data.
■ Remote mode controls the L452 from “outside.” You can connect the instrument directly to a computer and then work with it
through the DataView Data Logger Control Panel (see § 6). Remote mode can be enabled automatically (when the instrument
is actively communicating with the computer) or manually by selecting an option in the Control Panel.
Working environments for the Model L452 include factory oors, utilities, and any area being monitored for environmental or process
trends. Users of the Model L452 include utility personnel, factory technicians, environmental monitors, and others. Typical applications
include process measurement, utility metering, monitoring a battery’s charge, and any application involving phenomena recorded over a
period of time.
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8 Data Logger Model L452
2.2 Electrical Power
The instrument can operate on two sources of power:
■USB cable connected to an external power source, such as a computer
■Two internal 1.2V AA rechargeable NiMH batteries
You must insert the batteries into the instrument before use, even when operating on USB power. Consult §8.1.3, “Installing and Replac-
ing the Batteries,” for instructions about how to do this.
2.3 Using the Model L452 User Interface
Before using the Model L452 for the rst time, you should take a few minutes to familiarize yourself with the instrument’s user interface.
This consists primarily of a set of screens that appear on the L452’s LCD, and the buttons used to navigate these screens, select options,
and enter conguration information. These buttons and screens operate in combination to enable you to view displayed data, select the
congurable parameters, and modify these parameters. The functions performed by the buttons depend on what operational mode (navi-
gation, selection, or edit) the L452 is currently in:
■Navigation mode is the default state for the user interface. In navigation mode the Up ▲, Down ▼, Left ◄, and Right ►
buttons are used to navigate through the columns and rows of screens.
■Selection mode is initiated by pressing the Enter button while in navigation mode in any conguration screen. In selection
mode the buttons are used to select a conguration parameter, or an individual value within a multi-value parameter. The
selected user-editable option appears in blinking reversed text (light on dark background).
■Edit mode is started by pressing the button in selection mode. In edit mode buttons are used to change the value of the
currently selected congurable parameter. When in edit mode, editable elds appear in solid (non-blinking) reversed text.
2.3.1 Model L452 Screens
The screens that appear on the instrument’s 128 x 64 graphical LCD serve as the primary interface through which you interact with the
instrument locally. These screens, in conjunction with the buttons on the front panel, provide the features and functionality that enable the
Model L452 to operate as a standalone instrument.
Screens are organized into six categories:
■Measurement data screens display the measurement data (including minimum and maximum values) for the two input
channels.
■ Recording screens start, stop, schedule, and congure recording sessions.
■ Channel 1 conguration and Channel 2 conguration screens set a variety of parameters for each channel on the
instrument, including input type, measurement units, scaling, alarms, and related information. (Note that input type must be the
same for both channels.)
■ Instrument conguration screens set general parameters and perform tasks on the instrument, such as setting the display
language, erasing memory, resetting the conguration to default settings, setting date/time, and modifying Bluetooth settings.
■Instrument information screens are display-only and show current instrument information.
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Data Logger Model L452 9
These screens are described in detail in Appendix A. An example of a Model L452 screen is shown in Figure 2:
1 6
7
8
9
10
2
3
4
5
OL
1
2
mV
mV
24.5
91.8
Figure 2
Item Description
1
Recording indicates the current status of recording activity on the instrument.
- An empty (unlled) circle (shown above) indicates a recording is scheduled but has not yet started.
- A lled circle indicates a recording is currently in progress.
- If no circle appears, a recording is neither scheduled nor in progress.
2Overload indicates that the input is out of range for the selected input type and cannot be displayed.
3
Battery indicates how much electric charge remains in the Model L452’s two batteries. The lled portion of the icon cor-
responds to the percentage of remaining power. When the batteries are charging, the lled portion repeatedly moves from
the completely discharged level to the completely full level.
4Measurement data for Channel 1.
5Measurement data for Channel 2.
6Alarm indicates at least one channel is in an alarm condition.
7
Remote mode indicates that Remote mode is enabled. When this icon is displayed, all conguration screens are dis-
abled; only the measurement data screens remain operational. This symbol does not appear when the instrument is in Local
mode.
8Bluetooth when displayed indicates Bluetooth is enabled and available. This icon ashes when Bluetooth communication
is active between the instrument and a computer.
9
Memory indicates how much available memory remains in the instrument for storing recording sessions. The lled por-
tion of the icon corresponds to the percentage of memory used. No ll indicates memory is empty; completely solid indicates
memory is full.
10 Units of measurement.
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10 Data Logger Model L452
2.3.2 Front Panel Buttons
The Model L452 interface also includes a set of buttons:
Figure 3
These buttons, in conjunction with the LCD, provide the built-in ability to congure the instrument and view measurement data, without
requiring a computer connection.
Button Description
Left and Right: These buttons move from one category/column of screens to the next. Pressing ► while viewing
any measurement data screen displays the top-level recording screen. Pressing ◄ while any recording screen is
displayed returns you to the top-level measurement data screen. This functionality is “circular” – pressing ◄ while a
measurement data screen is displayed navigates to the top-level instrument information screen; pressing ► while an
instrument information screen is displayed goes to the top-level measurement data screen.
- In selection mode, ◄ and ►move within multi-part input elds such as Recording Duration.
- In edit mode, ◄ and ► are individually inactive in option selection elds, and active in text and numeric entry
elds.
- Pressing both buttons simultaneously terminates the editing session without saving any changes and returns
to navigation mode.
Up and Down: These buttons navigate through the individual screens in a category. Pressing ▼ while in the top-
level measurement data screen (Channels 1 & 2 Measurement Data) displays the Channel 1 Measurement and Min/
Max Data screen; pressing it again displays the Channel 2 Measurement and Min/Max Data screen, and so on. This
functionality is “circular” - pressing ▼ while a bottom-level screen is displayed returns you to the top-level screen in
that column.
- In selection mode ▲ and ▼ navigate to user-editable elds on the screen; as you do, the currently selected
eld blinks in reversed text.
- In edit mode ▲ and ▼ either (1) cycle through the available options for the eld, or (2) enter text characters in
text-editable elds such as Bluetooth Name.
Enter: This button, when pressed at a user-congurable screen, enables you to select and change displayed set-
tings. (Pressing at an information-only screen has no e󰀨ect.)
- Pressing once initiates selection mode. This causes the rst user-congurable eld in the screen to be
highlighted in blinking reversed (light on dark) text. You can then use ▲ and ▼ to navigate to other user-edit-
able elds on the screen; as you do, the currently selected eld blinks.
- Pressing a second time while positioned on a blinking eld initiates edit mode. This enables you to change
the settings for that eld. The selected eld stops blinking but remains highlighted in reversed text. You can
then use ▲ and ▼ to cycle through the available options for the eld, or enter text characters in text-editable
elds.
- When the desired option is displayed (or text entry is complete), pressing a third time ends the editing ses-
sion, saves the conguration changes, and returns to navigation mode.
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Data Logger Model L452 11
Power: In Local mode, pressing the Power button for longer than two seconds either turns ON the instrument
when it is OFF or turns OFF the instrument when it is ON.
- When the instrument is OFF, a short press of displays a graphic that indicates how much power remains in
the instrument’s batteries.
- When the instrument is ON, a short press of this button acts as a “home” button. No matter where you are in the
screen interface, a short press of cancels the operation and returns you to the Channels 1 & 2 Measurement
Data screen. In addition, if the instrument is ON but in screen saver mode (the display is blank), a short press of
this button displays the Channels 1 & 2 Measurement Data screen.
- In Remote mode, a short press of has no e󰀨ect. Holding down this button for approximately two seconds
displays a message informing you that you are in Remote mode. To turn OFF the instrument, continue to hold
down while the Remote Mode message is displayed; after approximately two seconds the L452 will turn
OFF.
2.3.3 Entering Text
There are two screens (Units and Bluetooth Name) in which you are prompted to enter text. To do this, you must enter edit mode and then
use the navigation buttons to move through the elds in these screens and enter text. The steps for doing this are as follows:
1. With an editable screen displayed, press the Enter button once. This initiates selection mode. The rst character of the
editable eld will blink.
2. Press again to enter edit mode. The rst character of the editable eld will appear in solid reversed text.
3. To change the selected character, use the Up ▲ or Down ▼ button. If the selected character is a number, pressing ▲
increases that number by one and pressing ▼ decreases it by one. If the character is a letter, pressing ▲ or ▼ displays the
next or previous letter respectively. If the character is a non-alphanumerical character (punctuation mark, blank space, and so
on) pressing ▲ or ▼ cycles through the list of all available characters.
For example, suppose that the selected language is English and the rst character of the eld is blank. Holding down ▲ cycles
through (1) punctuation marks, (2) the numbers 0 through 9, (3) uppercase letters, (4) lowercase letters, and (5) mathematical
symbols. Continuing to hold down ▲ displays a blank space, after which the cycle repeats. Holding down ▼ performs the
same cycle in reverse.
4. When the desired character appears, press ►to move to the next character in the eld. You can now use ▲ or ▼to change
the highlighted character.
5. If you need to modify a previous entry, press ◄to return to the character to be changed.
6. When entering numerical data in elds that allow for decimal values (such as the screens for setting low and high scaling),
you can move the decimal point by pressing the ◄ and ► buttons. For example, pressing ► when the right-most character
is highlighted moves the decimal point to the left. Similarly, pressing ◄ when the left-most character is highlighted moves the
decimal point to the right.
When you have nished entering text, press to save your changes, exit edit mode, and return to navigation mode.
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12 Data Logger Model L452
3. CONFIGURATION
Before you can use the Model L452 for the rst time, you must set the appropriate conguration variables on the instrument. Some of
these settings apply to the entire instrument (such as the instrument date and time), while others a󰀨ect a specic input channel.
Note that conguration can also be performed via the DataView Data Logger Control Panel (see § 6). Conguration changes made
through the Control Panel will overwrite previous changes made through the instrument’s front panel interface, and vice versa.
Note also that conguration through the instrument’s interface is disabled when the Model L452 is in Remote mode.
In addition, you can review instrument settings. These include parameters that have been congured through the instrument interface, as
well as settings congured through the Control Panel. You can also review display-only settings, such as the instrument’s serial number.
3.1 Instrument Conguration
The following instrument conguration parameters can be set through the front panel interface:
■Language
■Date and time
■Enabling/disabling Bluetooth
■Bluetooth name
■Enabling/disabling Bluetooth visibility
All these options are set through the instrument conguration screens. The top level screen in this set is the Language and Date/Time
Format screen. This is the starting point for all instrument conguration operations. To display this screen, proceed as follows:
1. If the Model L452 is turned OFF, turn it ON by pressing the Power button and holding it down until the message POWER
ON appears on the LCD. (This takes approximately two seconds.) The Channel 1 & 2 Measurement Data screen then
appears.
OL
1
2
mV
mV
24.5
91.8
Figure 4. Channel 1 & 2 Measurement Data Screen
This is the “Home” screen for the user interface, and serves as the starting point for navigating to other screens. If the
instrument is already ON and a di󰀨erent screen is displayed, a short press of Power returns to the Channel 1 & 2
Measurement Data screen.
2. With the Channel 1 & 2 Measurement Data screen displayed, press the Right ►button four times to display the Language and
Data/Time Format screen.
LANGUAGE:
ENGLISH
DATE/TIME:
MM/DD/YY 24h
Figure 5. Language and Date/Time Format screen
You are now at the top-level instrument conguration screen, and can press the ▲ and ▼ buttons to display other instrument conguration
screens. Some of this information can be changed, while other information is read-only.
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Data Logger Model L452 13
3.1.1 Choosing the Language for the Interface
Text on user interface screens can be displayed in English, French, Spanish, Italian, and German. To select a language, do the following:
1. With the Language and Date/Time Format screen (Figure 5) displayed, press the Enter button. This initiates selection
mode; the setting under the Language eld will change to blinking reversed text.
2. Press again to enter edit mode. The Language setting now appears in solid reversed (light on dark) text.
3. Use the ▲or ▼button to cycle through the available languages. Choices are English, Español, Italiano, Deutsch, and
Français.
4. When the desired language choice is displayed, press . The text on all screens now appears in the selected language.
3.1.2 Setting the Instrument Date and Time
The Model L452 interface enables you to set or change the instrument’s date and time. You can also choose the format in which date and
time information is displayed. To do this:
1. With the Language and Date/Time Format screen displayed, press . This initiates selection mode; the setting under the
Language eld will change to blinking reversed text.
2. Press ▼. The setting under Date/Time appears in blinking reversed text.
3. Press to initiate edit mode.
4. Press ▲or ▼to cycle through the available options for date and time format. Choices are:
MM/DD/YY AM/PM. The date will appear in month/day/year format, and the time will appear in AM/PM format. For example,
with this setting December 25, 2015 at 3:00 PM will appear as: 12/25/15 3:00 PM.
MM/DD/YY 24h. The date will appear in month/day/year format, and the time will appear in 24-hour (military) format. For
example, with this setting December 25, 2015 at 3:00 PM will appear as: 12/25/15 15:00:00.
DD/MM/YY AM/PM. The date will appear in day/month/year format, and the time will appear in AM/PM format. For example,
with this setting December 25, 2015 at 3:00 PM will appear as: 25/12/15 3:00 PM.
DD/MM/YY 24h. The date will appear in day/month/year format, and the time will appear in 24-hour (military) format. With this
setting December 25, 2015 at 3:00 PM will appear as: 25/12/15 15:00:00.
5. After you make your selection, press to save it. All elds on the Language and Date/Time Format screen should now
appear in regular text.
6. Press ▼three times. The Date and Time screen now appears.
Date:
11/12/15
Time:
10:29:15
Figure 6. Date and Time Screen
Note that in Figure 6, the date and time appear in MM/DD/YY 24h format, as selected in step 4 of this procedure.
7. Press once to initiate selection mode. The rst number in the Date eld (which in MM/DD/YY format is the month, and in
DD/MM/YY format is the day) will blink.
8. To change this number, press to initiate edit mode. Then use the ▲and ▼buttons to increase/decrease this number until
the correct value is displayed.
9. To change the other two settings in the Date eld, press ►to navigate to the number you want to set. Then press ▲or ▼to
change the setting. You can also use ◄to navigate back to a previous number.
10. To change the Time eld, press ► while the last number in the Date eld is selected. This highlights the rst number in the
Time eld.
Alternatively, if you are not in edit mode (for example, you have opened the Date and Time screen and only want to change
the time while leaving the date unchanged), press to initiate selection mode. Then while the rst number in the Date eld is
blinking, press ▼. The rst number in the Time eld will blink; press to initiate edit mode.
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14 Data Logger Model L452
11. Change the numbers in the Time eld, using the buttons as explained in the steps above.
12. When you have nished setting the Date and Time values, press to save your changes and leave edit mode.
3.1.3 Enabling and Conguring Bluetooth
The Model L452 can be connected to a computer running DataView. Once connected, you can use DataView’s Data Logger Control Panel
to view real-time data measured by the instrument, congure settings, start a recording session, and download recorded data for distribu-
tion and analysis. There are two ways to establish this connection. One is by using a USB cable to directly connect the Model L452 to the
computer (see § 6.3.1). The other is through Bluetooth, a protocol designed to allow devices to communicate wirelessly.
Connecting to a computer with Bluetooth involves three general tasks:
1. Enable and congure Bluetooth on the computer. The steps for doing this depend on the type of computer you are using, and
whether it has built-in Bluetooth capability or requires a USB-to-Bluetooth adapter. Consult the documentation that comes with
your computer for information about how to enable and congure Bluetooth.
2. Enable and congure Bluetooth on the Model L452.
3. Pair and connect the instrument to the computer using Bluetooth. This is done on the computer, and is described in § 6.3.2.
The instrument’s Bluetooth range under ideal conditions can be up to 100 meters (approximately 328 feet) line-of-sight, although outside
interference, di󰀨erent adapter types, and other factors can reduce this range. The data transmission rate is 115 kbits/s. Note that dis-
abling Bluetooth when the L452 does not need to communicate with a computer (for example, during a long recording session) decreases
power consumption and lengthens the life of the instrument’s batteries.
To enable and congure Bluetooth on the Model L452, do the following:
1. With the Language and Date/Time Format screen displayed, press ▼four times. This displays the Bluetooth Enabled/Visibility
screen:
Bluetooth:
Enabled
Visibility:
Visible
Figure 7. Bluetooth Enabled/Visibility screen
2. To change the Bluetooth setting, press once to initiate selection mode. Then press a second time to initiate edit mode.
3. Use the ▲or ▼button to toggle through the two options Enabled and Disabled. When the desired option is displayed, press
to save the selection and leave edit mode. When the Enabled option is selected, the Bluetooth icon appears in the icon
bar.
4. To change the Visibility setting, press to initiate selection mode. Then press ▼ to select the Visibility eld. Press to
initiate edit mode, then use ▲or ▼to toggle through the two options Visible and Invisible.
Typically, you will initially set this option to Visible so the Model L452 will appear in your computer’s list of Bluetooth devices
available for pairing. After you pair the instrument on the computer, you can then change this eld to Invisible to avoid it
showing up in the list of available devices for other computers within range of the Bluetooth transmitter. This prevents other
computers from gaining unauthorized access to the instrument via Bluetooth.
When the correct option is selected, press to save the setting and leave edit mode.
5. You can now change the Bluetooth name. This is the name by which the instrument will appear in the computer’s list of
available Bluetooth devices. By default, this name is “L452-” followed by the instrument’s serial number. To change this, press
▼at the Bluetooth Enabled/Visibility screen. This displays the Bluetooth Name screen.
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Data Logger Model L452 15
Bluetooth
Name:
L452-452105MLP
Figure 8. Bluetooth Name screen
6. The Bluetooth name consists of two parts. The rst part is “L452-“ and cannot be changed. The second part is editable. To
change this, press once to initiate selection mode; the rst character in the editable part of the Bluetooth name blinks.
Press a second time to initiate edit mode, and change the character using ▲or ▼.
7. You can now change other characters in the Bluetooth name. Press ►to highlight the next character and use the ▲and ▼
buttons to make your change. You can also press ◄to navigate back to a previous character.
8. When you are nished editing the name, press to save your changes.
The instrument can now be paired and connected to the computer via Bluetooth (see §6.3.2).
3.2 Channel Conguration
In addition to general instrument settings, you can also set parameters for channel 1 and channel 2. Each channel has its own set of
conguration screens; the screens for one channel are essentially identical to the screens for the other. These screens allow you to:
■Enable and disable the channel. When disabled, measurements are neither recorded nor displayed for the channel.
■Select the type of input. This can be analog (voltage or current), pulse, or event. Note that both channels must have the
same input type.
■Dene measurement units. These units are used when displaying measurement data.
■Dene scaling. This establishes the relationship between input and measurement units.
■Enable and dene alarm triggers. This determines whether or not (and under what circumstances) the L452 reports an alarm
condition.
■Dene how pulse input equates to measurement units.
■Dene the circumstances under which the Model L452 reports an event.
The following sections explain how to perform these tasks. The starting point for these procedures is either the Channel 1 Enable/Disable
screen or the Channel 2 Enable/Disable screen, depending on which channel you want to congure. These are the top-level screens for
conguring channel 1 and channel 2 respectively. To display these screens:
1. Display the Channel 1 & 2 Measurement Data screen. This screen appears when you rst turn ON the L452. If the instrument
is already ON but is displaying a di󰀨erent screen, a short press of the Power button returns you to this screen.
2. Press ►twice to display the Channel 1 Enable/Disable screen, or three times to display the Channel 2 Enable/Disable screen.
CHANNEL 1:
ENABLED
INPUT:
PULSE
Figure 9. Channel 1 Enable/Disable screen
In the following sections, we describe conguring channel 1. However, these instructions apply equally to conguring channel 2.
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16 Data Logger Model L452
3.2.1 Enabling and Disabling Channels
The rst eld shown in Figure 9 enables and disables the channel. By default, both channels are enabled. To change this setting, do the
following:
1. At the Channel Enable/Disable screen, press once to initiate selection mode. The setting under Channel will blink.
2. Press a second time to initiate edit mode.
3. Use ▲and ▼to toggle between the options Enabled and Disabled. When the correct option is displayed, press to save
the setting.
When a channel is disabled, it does not display or record measurement data.
Note that both channels cannot be disabled at the same time. If channel 1 is disabled, and you disable channel 2, channel 1 will automati-
cally become enabled. This prevents running a recording session with both channels erroneously disabled.
3.2.2 Selecting the Input Type
The second eld shown in Figure 9 denes the input type for the two channels. This input type applies to both channels, and needs to
match the output type of the sensor, signal conditioner, or probe connected to this channel. The following input types are supported:
■Voltage (±100mV, ±1V, and ±10V)
■Current (4 to 20mA)
■Pulse
■Event
Voltage and current input types are collectively known as analog input.
3.2.2.1 Analog
Voltage and current input can be scaled to user-selected measurement units. For example, if a temperature sensor outputs 4mV at -50°F
and 40mV at 200°F, you can specify the following:
■Input type: ±100 mV
■Units: degF (see § 3.2.3)
■Low scaling: display a measurement of -50 degF when the input is 4mV (§ 3.2.4)
■High scaling: display a measurement of 200 degF when the input is 40mV (§ 3.2.4)
Sampling period, storage period, and other user-congurable parameters associated with recording and displaying data, can be set for
both voltage and current input as explained in § 5.
3.2.2.2 Pulse Count
You can dene the “equivalence” setting for a pulse – in other words, the actual displayed measurement value that each pulse represents
(see § 3.2.6).
3.2.2.3 Event
Event input can range from -10V to +10V, sampled 16 times per second. An event is dened as a transition between a sample that mea-
sures higher than 1V and an adjacent sample (either preceding or following) that measures 1V or lower.
To select the channel’s input type:
1. At the Channel Enable/Disable screen, press once to initiate selection mode. The setting under Channel will blink.
2. Press ▼to highlight the input setting.
3. Press to initiate edit mode.
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Data Logger Model L452 17
4. Use ▲and ▼to cycle through the available input type options: ±100 mV, ±1 V, ±10 V, 4-20 mA, Event, and Pulse.
5. When the correct input type is selected, press to save the setting.
Note that both channels must have the same input type; you cannot select one input type for one channel and a di󰀨erent type for the
second. For instance, if you select Pulse for channel 1 and then select Event for channel 2, the input type setting for channel 1 will auto-
matically be changed to Event to match channel 2.
3.2.3 Dening Units
If the input type is set to analog (voltage or current) or pulse, you can specify the units to which the input measurements will be converted
for display. The following steps explain how to do this:
1. At the Channel Enable/Disable screen, press ▼. This displays the Units screen. (This screen does not appear if the input type
is set to Event.)
CHANNEL 1:
UNITS
Figure 10. Units screen
2. Press once to enter selection mode, then press a second time to begin edit mode.
3. Enter the units, using the buttons as explained in § 2.3.3. These units can be anything you choose. The maximum length of the
unit name is four characters.
4. When you have nished entering the units, press to save the setting.
Note that if you do not specify a unit, the following defaults will be used, depending on input type:
■mV for ±100mV input
■V for ±1V and ±10V input
■mA for 4-20mA input
■Wh for pulse input
3.2.4 Selecting Low and High Scaling Factors
As noted previously, the analog input received by each channel can be “scaled” to its dened units. To do this, you must dene both the
low scale (the measurement value when the input is at a pre-set low value) and high scale (the measurement value when the input is at
maximum). This enables the L452 to correctly interpret the input it receives from the connected probe or sensor and then display mea-
surement data in the selected units.
Scaling determines the accuracy of the instrument’s displayed measurements. Di󰀨erent sensors and probes have di󰀨erent scaling require-
ments; consult the specications that come with your sensor/probe to set the scaling correctly on the L452.
For example, suppose a temperature probe measures a range from -40 to 80°C. At -40°C, the probe’s current output is 4mA, and at
80°C the output is 20mA. To ensure the L452 displays data from this probe correctly, you must scale 4mA input received from the probe
to display a reading of -40°C, and scale 20mA input to 80°C. This scaling is then used to convert the input to the displayed temperature
readings. To do this:
1. At the Channel Enable/Disable screen, press ▼twice. This displays the Scale Low screen. (This screen does not appear if the
input type is set to either Pulse or Event.)
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18 Data Logger Model L452
CHANNEL 1
4.00 mA
=-40.00 degC
SCALE LOW:
Figure 11. Scale Low screen
2. This screen displays the low input value, as determined by the input type. For example, if the input type is set to 4-20 mA,
the displayed value is 4.00 mA, as shown in Figure 11. Below this eld is the value to which the input setting will scale. This
is expressed in the measurement units dened in the Units screen. To change this setting, press once to enter selection
mode, then press a second time to begin edit mode.
3. Enter the low scale measurement value, using the buttons as explained in § 2.3.3. Allowable values are oating point numbers
in the range of +/- 0.999 to 999.9; these values must not fall outside the range dened by the selected input. The value can be
a negative number.
In Figure 11 we have set the low scale measurement value to “-40.00 degC.” This means that when channel 1 receives 4mA
input from the probe, the LCD will display this data as “-40 degC.”
4. When you have nished entering the low scale measurement value, press to save the setting and exit edit mode.
5. You must now set the high scale value. In our example, we will scale 20mA input to a measurement value of 80°C. To do this,
with the Scale Low screen displayed press ▼once. This displays the Scale High screen.
CHANNEL 1
20.00 mA
= 80.00 degC
SCALE HIGH:
Figure 12. Scale High screen
6. This screen functions similarly to the Scale Low screen except (as the name suggests) it denes what the measurement value
should be when the input reaches its maximum value. Note that the measurement value entered in the Scale Low screen
can be higher than the value entered in the Scale High screen. This is useful in cases where a rising input voltage or current
corresponds with a decreasing measurement value.
In Figure 12 we have set the high scale value to “80.00 degC.” This means that when channel 1 receives 20mA input from the
probe, the LCD will display this data as “80 degC.”
7. When you have nished entering the high scaling value, press to save the setting.
Note that by default, scaling is one-to-one. In other words, one input unit equals one measurement unit. Also note that neither scaling
screen is displayed if the input type is set to Pulse or Event.
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Data Logger Model L452 19
3.2.5 Enabling and Dening Alarm Triggers
When enabled, an alarm is triggered when the measurement on either channel meets a user-dened criterion such as exceeding or falling
below a certain value. When this happens, the Alarm icon appears in the icon bar at the top of the LCD.
To enable and dene an alarm, do the following:
1. At the Channel Enable/Disable screen, press ▼four times. This displays the Alarm Trigger screen. (This screen does not
appear if the input type is set to Pulse or Event.)
ALARM TRIGGER:
ABOVE UPPER
Figure 13. Alarm Trigger screen
2. Press to enable selection mode, and then press again to begin edit mode. You can now set the Alarm Trigger eld.
Options are:
Disabled. When disabled, alarm detection is not active for this channel.
Outside Limits: The alarm is triggered when the measurement falls outside the range dened by the upper and lower limits
settings (see below). The Alarm icon is displayed if the measurement falls either below the lower limit or rises above the
upper limit.
Within Limits: The alarm is triggered when the measurement falls within the range dened by the upper and lower limits
settings. The Alarm icon is displayed if the measurement is both above the lower limit and below the upper limit.
Below Lower: The alarm is triggered when the measurement falls below the lower limit setting.
Above Upper: The alarm is triggered when the measurement exceeds the upper limit setting.
3. Use ▲or ▼to cycle through the options. When the correct option is displayed, press to save the selection.
4. You can now set the upper and/or lower limits that will trigger the alarm. Do this by pressing ▼at the Alarm Trigger screen.
This displays the Upper and Lower Limits screen.
UPPER LIMIT:
50.00 degC
LOWER LIMIT:
-10.00 degC
Figure 14. Upper and Lower Limits screen
If the trigger you selected in step 3 is Above Upper, the Lower Limit eld is inactive because it is irrelevant for dening the
alarm condition. Similarly, if the trigger is Below Lower the Upper Limit eld is inactive. The steps below assume that both the
Upper Limit and Lower Limit elds are active.
5. To change the upper limit setting, press to initiate selection mode, then press a second time to begin edit mode. Set the
upper limit, using the instrument’s buttons as described in § 2.3.3. When nished, press to save the change and leave edit
mode.
6. To change the lower limit, press to initiate selection mode. Then press ▼to select the lower limit value.
7. Press to begin edit mode, and enter the lower limit value. Note that if both limits are used (in other words, the trigger is set
to either Outside Limits or Within Limits), the lower limit cannot be higher than the upper limit.
8. When you have nished setting the lower limit, press to save your change.
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20 Data Logger Model L452
3.2.6 Dening Equivalence (Pulse Input Only)
Similar to analog input, pulse input can be “mapped” to measurement units. To do this, you must dene the relationship between one pulse
and the measurement units you have selected:
1. At the Channel Enable/Disable screen, press ▼ twice. This displays the Equivalence screen. (This screen only appears when
the input type is set to Pulse.)
CHANNEL 1
EQUIVALENCE:
1.00 Pulse
= 0.1 Wh
Figure 15.Equivalencescreen
2. Press to initiate selection mode, then press again to begin edit mode. Then type in the measurement value that each
pulse represents, using the buttons as described in § 2.3.3. Allowable values for the pulse equivalence are positive oating
point numbers in the range of .0001 to 9999. For example, in the preceding illustration we have dened one pulse as being
equivalent to 0.1Wh.
3. When you have nished entering the equivalent measurement value of one pulse, press to save your changes.
Note that by default, one pulse equals one Wh.
3.2.7 Selecting Event Trigger (Event Input Only)
Event input consists of data that indicates whether or not an event (a transition between low and high states) has taken place. You can
enable event input by selecting Event in the Channel Enable/Disable screen (see Figure 9). An event can be either rising or falling:
■A rising event is triggered when input transitions from a low state (input equals 1V or less) to a high state (input exceeds 1V).
■A falling event is triggered when input transitions from high to low.
To dene which type of event you want the L452 to report, do the following:
1. At the Channel Enable/Disable screen, press ▼. This displays the Event Trigger screen. (This screen only appears when the
input type is set to Event.)
TRIGGER:
RISING
Figure 16.EventTriggerscreen
2. Press to initiate selection mode, then press again to begin edit mode. Press ▲or ▼to toggle between the available
options Rising and Falling.
3. When you have nished selecting the event trigger type, press to save your changes.
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