Extech Instruments 42275 Bedienungsanleitung

User's Guide

Model 42275 Temperature and Humidity Datalogger Kit

Model 42265 Temperature Datalogger Kit

Model SW276 Software and Cable (for 42276/42266)

42275A 42265A SW276cd Rev 3.0 3/06

Introduction

Congratulations on your purchase of the Extech Datalogging kit. The following models

are covered in this manual:

Model 42275: Temperature & Humidity Datalogging Module plus docking station & WindowsTM Software

Model 42265: Temperature-only Datalogging Module plus docking station & WindowsTM Software

Model 42276: Temperature & Humidity Datalogging Module plus printing/docking station & Optional

WindowsTM Software

Model 42266: Temperature-only Datalogging Module plus printing/docking station & Optional WindowsTM

Software

Model 42270: Temperature and Humidity Datalogging Module

Model 42260: Temperature-only Datalogging Module

The Datalogging modules can be used to monitor the temperature of greenhouses,

warehouses, food transports, aircraft cabins, refrigerated trucks, containers, museums,

and HVAC equipment. The Model 42270 records Relative Humidity readings in addition

to temperature readings. Modules can store 16,000 (8000 temperature and 8000 %RH

for 42270) readings that can later be transferred to PC or directly printed using the Model

42276 Programmer/Printer (covered in a separate manual). Careful use of this device

will provide years of reliable service.

The datalogger display will not switch on until

activated through the software.

The datalogger module display will not switch on until it is activated by the software in the

LOGGER SET menu as described later in this manual. In LOGGER SET the user selects

the type of recording activation. When the logger begins to log data, the display and status

LEDs will switch on.

42275A 42265A SW276cd Rev 3.0 3/06

Description

1. LCD display

2. Mounting hole

3. Docking station

4. Interface Cable

5. Status LEDs

6. Software CD

Displays

LCD Display

REC: Displayed while logging readings. Read the

‘Recording Status’ section for further details.

HI and LOW: Displayed when the High or Low Alarm limit

is exceeded. See ‘Alarm Status’ below for further

information.

RH%: Relative Humidity (42270 and 42275 only)

C or F: Temperature units.

COMM: Appears when Datalogger is communicating with a PC.

Recording Status Indication

Both the RED status LED and the display indicator ‘REC’ will flash every 5 seconds if the

sampling rate is set to 5 seconds or higher. If the sampling rate is set lower than 5

seconds, the indicators will flash every 1, 2, 3, or 4 seconds as programmed.

ALARM Status Indication

Both the YELLOW status LED and the display indicator ‘ALM’ will flash when the recorded

value is higher than the user programmed High Alarm value or lower than the Low Alarm

value. The Alarm status LED and the ‘ALM’ display indicator flash every 5 seconds if the

sampling rate is programmed for 5 seconds or higher. If the sampling rate is set lower than

5 seconds, the indicators will flash every 1, 2, 3, or 4 seconds as programmed.

Low Battery Indication

When the lithium battery voltage nears the critical operating level, the LCD displays ‘LO’.

To replace the battery, refer to the Battery Replacement section of this manual.

REC HI LOW COMM

RH%



42275A 42265A SW276cd Rev 3.0 3/06

Main Screen

Diagram A: Main Screen

Cursor 1 and 2 Control

Click on a cursor line to select it. When you click the red cursor line, it turns bold red. When

you click the green, it turns bold green. The CURSOR STATUS field (lower left) shows the

cursor positions. As the Arrow keys are used to select the last record or the next record, the

cursor location numbers change to reflect their new position.

Left arrow key Moves to previous point on the current plot.

Right arrow key Moves to next point on the current plot.

<Shift>-left arrow key Moves back 10 points on the current plot.

<Shift>-right arrow key Moves forward 10 points on the current plot.

<Home> Moves to first visible point on the current plot.

<End> Moves to last visible point on the current plot.

Drag a cursor to move it

Click and drag the cursor with the mouse. The cursor tracks the mouse until you release the

mouse button. When the mouse button is released, the cursor snaps to the nearest data

point.

Offset Knob

You can use the Offset control in the DISPLAY CONTROL field (lower right) to optimize the

data viewing area. Press the up or down arrow key to increment or decrement the record

number (with corresponding date) in the graph.

42275A 42265A SW276cd Rev 3.0 3/06

Zooming and Panning on Graphs

To zoom in a point, press the <Ctrl> key and click the left mouse button over the desired

point; you can release the <Ctrl> key after you press the mouse button. The view resolution

increases until the mouse button is released. To zoom out, click on the right mouse button.

To pan, press the <Ctrl-Shift> keys and click on the left mouse button over the desired point,

then drag the mouse to another point. The graph view scrolls so that the original point now

appears under the new mouse cursor location. You can drag the mouse anywhere on the

screen.

To restore the view to its original state (after zooming or panning), press and hold the left

mouse button to drag the Offset and Range knobs’ yellow line in the DISPLAY CONTROLS

section.

Data record number or Time display selection

Press the switch button and select between Record number and Time ( HR:MN:SC). The

record number and time will display in turn while pressing the switch button .

Warning message

A warning message will appear on the lower left if the Datalogger is disconnected from the

PC.

<< WARNING: Data Logger not plugged into interface module!>>

Display Control

After downloading or retrieving a record, the numbers on the "Offset" and "Range" knobs will

change to:

Offset: 0000/5000/10000/15000

Range: 50/250/500/1K/2K/4K/8K/12K/16K.

42275A 42265A SW276cd Rev 3.0 3/06

Save File

To save a transferred data file:

Click on SAVE FILE, select a folder to save the file in, and name the data file.

42275A 42265A SW276cd Rev 3.0 3/06

Retrieve File

Click on RETRIEVE FILE to retrieve a previously saved file from your PC.

To aid in reading a graph, a grid can be drawn on the graph. A dialogue box display at the

bottom left hand corner shows the appearance of this grid.(CONTROL LOCATION Cursor 1

and 2)

After retrieving a file containing Humidity records, the labels "Temperature" and "Humidity"

will appear at the beginning of the curves. If no Humidity data is transferred, only the

Temperature curve will appear.

The date and time of the first point appears on the left hand corner. The last point’s date and

time appears on the right hand corner.

MAIN SCREEN WITH SAMPLE DATA

42275A 42265A SW276cd Rev 3.0 3/06

Com Port Setup

Select "Com. Port Setting". Select the COM port, Baud rate (9600), Data bits (8), Parity

(None) and Stop bits (1).

Select OK to accept settings, press Cancel to abort and exit.

42275A 42265A SW276cd Rev 3.0 3/06

Datalogger Settings

Press LOGGER SETTING to access the menu page

Sample Point Setup

Number of Data Points

Select the number of data samples you wish the logger to collect: 1000 / 2000 / 4000/ 8000 /

12000 / 16000 Scroll up or down to find the value and then click OK to save.

For example, if you select 1,000 samples, the logger will stop collecting data (and will power

off ) when 1000 data points have been collected. Datalogging ceases when the datalogger is

full. The yellow LED will stop flashing when datalogging ceases.

Sample Rate

Select the sampling rate in seconds(from 1 to 7200). Scroll up to increase the time or down to

decrease the time in seconds. The defaults sample rate is 2 seconds.

Start Modes :

Schedule -

Sets the desired Start Date/Start Time for datalogging. The datalogger will start when the

clock reaches the user programmed time and date. Ensure that the datalogger is set to the

current date and time.

Magnetic -

Connect the PC to the Datalogger to setup the Magnetic start mode. Select Magnetic and

ensure that the datalogger is set to the current date and time. Press "OK" , enter the desired

ID , press"OK" To confirm theMagnetic start setting . To start datalogging in Magnetic mode,

pass a strongly magnetized object by the bottom of the datalogger. The LED will start

flashing. Flashing rate depends on the sampling rate programmed.

Immediate -

The datalogger starts recording when the “OK” button is pressed.

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