ACR Systems TRH-1000 Manuale utente
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ACR Systems Inc. assumes no responsibility for errors or omissions, or for damages
resulting from the use of information contained in this document or from the use of
programs and source code that may accompany it. In no event shall the publisher and the
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Copyright © 2010 ACR Systems Inc. All Rights Reserved.
TRH Data Loggers
TrendReader is a Registered Trademark of ACR Systems Inc.
TRADEMARK NOTICES
ACR Systems Inc. warrants the hardware to be free from defects in workmanship and
components provided they are not abused or subjected to detrimental conditions. Refer to
the warranty information included with your logger for details.
Software is warranted for one year from the date of purchase, to operate in accordance
with its programmed instructions. It is not warranted to be error-free. If the product does
not perform in accordance with this Limited Warranty, ACR will at its discretion, either
repair or replace the product free of charge. There will, however, be a charge for freight
and Canadian Customs clearance (if applicable). Any replacement hardware or software
will be warranted for the remainder of the original warranty period. To the maximum
extent permitted by applicable laws, ACR Systems Inc. disclaims all other warranties,
either expressed or implied, including but not limited to, implied warranties of fitness for a
particular application. In no event shall ACR Systems Inc. be liable for any
inconveniences, loss, damages, etc., whatsoever arising out of the use of this product.
ACR's policy is not to proceed with any repairs or replacement unless first discussed with
ACR's Technical Support Analysts and an RMA (Return Material Authorization) number is
issued.
LIMITED WARRANTY
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Contents
Copyright © 2010 ACR Systems Inc. All Rights Reserved.
Table of Contents
Section I TRH Data Loggers 1
............................................................................................................................................ 11 Introduction to TRH
........................................................................................................................................................... 1Features
........................................................................................................................................................... 1
Description
........................................................................................................................................................... 2
Programmed Operation
........................................................................................................................................................... 2How TRH Loggers Take Readings
........................................................................................................................................................... 3
How to Use TRH Loggers
........................................................................................................................................................... 5
Specifications
........................................................................................................................................................... 6Product Approvals
............................................................................................................................................ 72 TRH Software Driver
........................................................................................................................................................... 7Logger Status
................................................................................................................................................. 7
Logger Sampling
................................................................................................................................................. 8
Logger Memory
........................................................................................................................................................... 10Logger Channels
................................................................................................................................................. 10
Channel Information
................................................................................................................................................. 11
Channel Calibration
............................................................................................................................................ 123TRH-1000 Temperature & Relative Humidity Logger
........................................................................................................................................................... 12Description
........................................................................................................................................................... 12Setup
........................................................................................................................................................... 13
Troubleshooting
........................................................................................................................................................... 13
Relative Humidity Calibration
............................................................................................................................................ 144APPENDIX A TRH-1000 Sample Rates
........................................................................................................................................................... 14
How a Data Logger Stores Readings
........................................................................................................................................................... 14
Sample Rate Table
Index 16
WELCOME
Congratulations on your purchase of a TRH-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 TRH-1000 data loggers work and how to use them,
read the Introduction to TRH-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 TRH-1000 logger you have.
TRH Data Loggers 1
Copyright © 2010 ACR Systems Inc. All Rights Reserved.
SECTION 1 TRH Data Loggers
1.1 Introduction to TRH
The TRH-1000 data logger 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
TRH-1000 is available to directly measure and record temperature and relative humidity
variables. It can reliably record time-based data for later analysis by TrendReadersoftware.
[****]
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
TRH-1000 data logger features make them a useful tool for data collection:
·Pocket-sized
·Solid-state components - no moving parts
·Low-power microprocessor controlled circuitry
·8-bit resolution readings
·High capacity lithium battery
·Quartz clock crystal
·Magnetic backing and secure locking hole
·Rugged die-cast Cycoloy® case
1.1.2 Description
TRH-1000 loggers can run continuously, constantly measuring and recording readings from
both channels. 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 TRH-1000 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.
TRH Data Loggers
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Copyright © 2010 ACR Systems Inc. All Rights Reserved.
Main Components
The main components of the TRH-1000 data loggers include:
·a memory chip that has the capacity to store up to 32,640 readings (see Specifications
)
·a microprocessor and an 8-bit analog-to-digital converter (A/D) that converts all
temperature and relative humdity signals to digital values
·a quartz clock crystal that accurately keeps track of time and regulates the taking of
readings
·a lithium battery that provides power to the logger and internal sensors
1.1.3 Programmed Operation
TRH-1000 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
·take readings from both channels
·associate each 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 TRH Loggers Take Readings
Each TRH-1000 data logger has an on-board temperature and relative humidity sensor that
you can use to record ambient temperature and relative humidity.
TRH-1000 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. The sample rate you select will apply to both channels. At a sample rate of eight
seconds, one reading is taken from both channels every eight seconds and saved to memory.
TRH-1000 data loggers can store readings using one of two sampling 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
TRH Data Loggers 3
Copyright © 2010 ACR Systems Inc. All Rights Reserved.
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
time-based data ready for detailed graphing and analysis.
1.1.5 How to Use TRH Loggers
Using your TRH-1000 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
TRH-1000 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 TRH-1000 data logger you must first have TrendReader software installed and
running on your computer. You can then configure your logger with various options by talking
to it via the interface 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 TRH-1000 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,
assign different equations, change sample rate, etc.).
Test
You can directly read the values that your TRH-1000 data logger is sensing using the Realtime
capability of TrendReader software. This test gives you the opportunity to check your logger
TRH Data Loggers
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Copyright © 2010 ACR Systems Inc. All Rights Reserved.
setup and make any necessary changes before starting the logging session.
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 lock your logger to a permanent
fixture using the security loop or take advantage of its small size and hide it completely out of
view. Because TRH-1000 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. Note that covering the logger may affect the
relative humidity readings.
When you place your TRH-1000 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 TRH-1000 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
Indice
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