ACR Systems JR-1000 Manual de usuario
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Copyright © 2010 ACR Systems Inc. All Rights Reserved.
JR Data Loggers
TrendReader is a Registered Trademark of ACR Systems Inc.
TRADEMARK NOTICES
I
Contents
Copyright © 2010 ACR Systems Inc. All Rights Reserved.
Table of Contents
Section I JR-1000/1001 Data Loggers 1
............................................................................................................................................ 11Introduction to JR-1000/1001
........................................................................................................................................................... 1Features
........................................................................................................................................................... 1
Description
........................................................................................................................................................... 2
Programmed Operation
........................................................................................................................................................... 2How JR Loggers Take Readings
........................................................................................................................................................... 3
How to Use JR Loggers
........................................................................................................................................................... 5
Specifications
........................................................................................................................................................... 6Product Approvals
............................................................................................................................................ 72JR-1000/1001 Software Driver
........................................................................................................................................................... 8Logger Status
................................................................................................................................................. 8
Logger Sampling
................................................................................................................................................. 9
Logger Memory
........................................................................................................................................................... 10Logger Channels
................................................................................................................................................. 10
Channel Information
................................................................................................................................................. 12
Channel Calibration
............................................................................................................................................ 133JR-1000/1001 Temperature Logger
........................................................................................................................................................... 13Description
........................................................................................................................................................... 13Setup
........................................................................................................................................................... 13
Troubleshooting
............................................................................................................................................ 15
4APPENDIX A JR-1000/1001 Sample Rates
........................................................................................................................................................... 15How a Data Logger Stores Readings
........................................................................................................................................................... 15
Sample Rate Tables
Index 18
WELCOME
Congratulations on your purchase of a JR-1000 data logger. We are confident that you
will find it to be a most valuable and useful tool for your data collection applications.
This Reference Guide is designed to be used hand-in-hand with TrendReader Standard
software and frequently refers to TrendReader Standard conventions and procedures. To
get the most from your logger, please take time to familiarize yourself with TrendReader
Standard and its Reference Guide.
For important information on how JR-1000 data loggers work and how to use them, read
the Introduction to JR-1000 chapter. It will give you an overview of how the loggers work
and how to configure them for your application. Next, read the chapter that deals with
JR-1000 logger you have.
JR-1000/1001 Data Loggers 1
Copyright © 2010 ACR Systems Inc. All Rights Reserved.
SECTION 1 JR-1000/1001 Data Loggers
1.1 Introduction to JR-1000/1001
The JR-1000/1001 data loggers is an easy-to-use, battery-powered data logger. Pocket-sized
and rugged, it can be used in a wide range of environmental and industrial applications. The
JR-1000/1001 directly measures and records temperature variables. It can reliably record
time-based data for later analysis by TrendReader software.
TrendReader software must be installed and ready to run prior to making use of the setup
instructions in this section of the guide.
1.1.1 Features
JR-1000/1001 data loggers features make them a useful tool for data collection:
·Pocket-sized
·Solid-state components - no moving parts
·Low-power microprocessor controlled circuitry
·8-bit high resolution readings
·Precision on-board thermistor temperature sensor
·High capacity lithium battery
·Quartz clock crystal
·Magnetic backing
·Rugged polyurethane encapsulation
1.1.2 Description
JR-1000/1001 loggers can run continuously, constantly measuring and recording readings
from its temperature channel. They can also start logging at a specified time. Self-powered by
a long-life lithium battery that will provide years of reliable operation, your JR-1000/1001 can
work independently from any external power supply or computer. When you are ready to look
at the data it has collected, you can transfer all information to your computer through the use
of TrendReader software.
JR Data Loggers
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Copyright © 2010 ACR Systems Inc. All Rights Reserved.
Main Components
The main components of the JR-1000/1001 data loggers include:
·a memory chip that has the capacity to store up to 244,800 readings (see
Specifications)
·a microprocessor and an 8-bit analog-to-digital converter (A/D) that converts all
temperature signals to digital values
·a quartz clock crystal that accurately keeps track of time and regulates the taking of
readings
·an accurate on-board thermistor that the logger uses to measure ambient temperature
via changes in resistance
·a lithium battery that provides power to the logger and internal sensors
1.1.3 Programmed Operation
JR-1000/1001 data loggers run according to settings that you program. These pre-selected
settings are stored in the logger's memory and instruct it to:
·take readings at regularly spaced intervals
·associate the channel with an equation in TrendReader software
·start readings with or without a delay
·take readings continuously, or stop when memory is full
1.1.4 How JR Loggers Take Readings
Each JR-1000/1001 data logger has an on-board temperature sensor that you can use to
record ambient temperature.
JR-1000/1001 data loggers can store readings to memory using one of two sampling methods:
1. First-in, First-out (FIFO). In this method the logger continues to take readings when its
memory is full (to make room, it discards the oldest reading every time it adds a new
one). Thus, the memory will contain a "sliding window" of information.
2.Stop when Full. The logger stops recording when its memory is full.
You can set the time interval at which your logger saves readings using TrendReader
software. At a sample rate of eight seconds, one reading is taken every eight seconds and
saved to memory. JR-1000/1001 data loggers can record readings using one of two modes:
1.Average. As you slow the sample rate the logger begins to average readings before
saving them to memory. To do this the logger takes a reading every eight seconds, but
instead of transferring this directly to the logger's memory, it stores the readings in an
accumulator (a temporary memory) where it is retained until the sampling interval is
over. Then the accumulator is averaged and the result is stored to memory.
2.Spot. The logger records the value of the reading at the selected sample interval and
stores it to memory. No averaging is done.
When you backup a logger's data to your computer, the correct time and date are referenced
to each reading. All readings are then individually time and date stamped and processed by
an equation associated with each logger channel. The result is a collection of accurate
JR-1000/1001 Data Loggers 3
Copyright © 2010 ACR Systems Inc. All Rights Reserved.
time-based data ready for detailed graphing and analysis.
1.1.5 How to Use JR Loggers
Using your JR-1000/1001 data logger for most applications is a simple process. With proper
planning, setup and installation of your data logger, you can be assured that the information
you collect will be both correct and useful. The following provides general procedures for using
JR-1000/1001 data loggers. For additional and specific information on these steps, refer to
the chapter in this manual.
Planning
Proper planning is the key to successful data logging. Time spent in this stage will help you
save time and frustration later. To help you plan, answer these questions:
·What exactly do I want to measure?
·Where is the best place to measure?
·How long do I want to monitor for?
·Should other variables be monitored simultaneously?
Setup
To set up your JR-1000/1001 data logger you must first have TrendReader software installed
and running on your computer. You can then configure your logger with various options by
connecting it directly to your computer's serial port or via a serial cable.
Set Sample Rate
Always confirm the sample rate (how often the logger saves readings) to make sure it will be
acceptable for your application. You can alter the frequency at which your JR-1000/1001
logger records readings by changing the sample rate. You can choose rates from 8 seconds
to 34 minutes. The sample rate chosen will apply to all the active channels on the logger.
To help determine which sample rate you should choose, answer these questions:
·How long do I need to record data?
·How much time will elapse between when I retrieve the logger and download the data to
my computer (for example, the trip back to the office)?
·How often do readings need to be taken?
Clear Memory
Before starting a logging session, clear the logger's memory. This will help to keep the
collected files smaller as well as decrease the time needed to backup the logger later. Note
that clearing the memory is automatic if you save or apply the setup changes (for example, set
memory compression on or off, change sample rate, etc.).
Test
You can directly read the values that your JR-1000/1001 data logger is sensing using the
Realtime capability of TrendReader software. This test gives you the opportunity to check
your logger setup and make any necessary changes before starting the logging session.
JR Data Loggers
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Copyright © 2010 ACR Systems Inc. All Rights Reserved.
Label
If you are working with more than one data logger, label each logger, identifying the task and
location before you distribute them throughout a building or system. To do this, you can simply
use a shipping tag. Later, when you retrieve them to graph their data, you will know what each
graph refers to. There is a description field in the Setup that can be used for entering the tag
information. Note that after editing and saving the Description you will need to click Contact to
update the new Description in TrendReader Explorer and in the Diagnostic Log.
Mounting
Use the magnetic backing to conveniently mount your logger on metal surfaces like ductwork
or electrical control cabinets. If you are concerned about theft take advantage of its small size
and hide it completely out of view. Because JR-1000/1001 loggers are so light, you can use
special mounting fasteners like Velcro® to attach them to almost any surface. Make sure your
logger's mounting method will last the full length of your logging session.
Do not rely on the logger's magnetic strip for adhesion if the mounting surface is uneven,
unstable or above 65°C (150°F).
Cold or Humid Environments
Make sure that the environment you will be placing your logger into will be acceptable by
referring to the Specifications in this chapter. If conditions are not adequate for the logger,
consider using a protective enclosure. For humid conditions you can protect your logger
simply by placing it in a zip-lock plastic bag.
When you place your JR-1000/1001 logger in a cold environment, make sure condensation
will not settle on the logger when you bring it back into warmer surroundings, such as an
office. The best way of preventing moisture is to place the logger in a container and include a
desiccant (a material that absorbs moisture). When you bring your logger back to your
computer, leave the logger in the container until it has had a chance to warm up to the
surrounding temperature. You can then take it out and backup the data to be analyzed.
Keep Track
Make sure you keep a record of where you have placed each logger in a building or system
plan. You will save time looking for them when your data gathering session is over. Also,
keep track of when you placed the loggers in the area you are monitoring. This will help when
producing graphs on your computer. It may be helpful to label (shipping tag) each logger so
you can properly identify and differentiate it from other loggers.
Analysis
After sufficient time has passed for the logger to obtain a representative profile of data, it is
time to analyze the information. If you are retrieving the logger from the field, bring it back
immediately to your computer for analysis.
In order to analyze your JR-1000/1001 logger's data, you must first transfer a backup copy of
its data to your computer. To do this, see Backup in the TrendReader guide. After
transferring your information to the computer, the data is automatically copied to disk and time
and date stamped.
You can find a detailed description of all software functions in the TrendReader guide.
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