Extech 42270 Manual

Extech Måling 42270

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User's Guide

Model 42270 Temperature & Humidity Datalogger

Model 42260 Temperature Datalogger

Introduction

Congratulations on your purchase of the Extech Datalogging Module. The following

models are covered in this manual.

Model 42270: Temperature and Humidity Datalogging Module

Model 42260: Temperature-only Datalogging Module

The Dataloggers 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. Instructions on how to program the

dataloggers are not included this manual. Programming and data retrieval

instructions are included in the 42275, 42265, 42276 and 42266 kits.

Description

1. Mounting hole

2. Status LEDs (Record and Alarm)

3. LCD display

Displays

LCD Display

REC: Displayed while logging readings.

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

RH%: Relative Humidity (42270 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 ash 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 ash every 1, 2, 3, or 4 seconds as programmed.

ALARM Status Indication

Both the YELLOW status LED and the display indicator ‘ALM’ will ash 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 ash 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.

Specications

Front panel status LEDs Two (2): RECORD and ALARM

Temperature range -40 to 85°C (-40 to 185°F)

Temperature resolution 0.1° up to 99.9°; 1° from 100° to 185°

Temperature accuracy ±0.6°C (1.2°F) from -20 to 50°C (-4 to 122°F)

±1.2°C (2.4°F) all other ranges

Humidity range & accuracy 0.0 to 99.9% Relative Humidity; Accuracy: ± 3%

Datalogger Memory 16,000 temperature readings (8,000 temperature and

8,000 humidity readings on the 42270)

Sampling rate Programmable from 1 to 7200 seconds (2 hours)

Power supply One 3.6V ½ ‘AA’ lithium battery

Battery Life 1 year: 5 second sample rate in sleep mode

3.8 months: 24 hour sample rate in non-sleep mode

Low battery Indicator Display shows ‘LO’

Dimensions 76.2 x 57.2 x 22.3mm (3 x 2.3 x 0.88")

The datalogger display will not switch on

until activated by software or the printer

programmer.

THESE DATALOGGERS CANNOT BE USED WITHOUT THE

SOFTWARE FROM KIT 42275 (42265) OR THE PRINTER

PROGRAMMER 42276 (42266).

Battery Replacement

When the low battery icon (‘LO’) appears on the LCD display, replace the Lithium CR2

battery.

1. Open Datalogger housing by rst removing the four (4) rear Phillips screws.

2. Carefully pry off the rear of the Datalogger.

3. The cylindrical lithium battery is located on the bottom of the PCB board.

4. Replace the battery, observing polarity.

5. Assemble the Datalogger housing.

You, as the end user, are legally bound (Battery ordinance) to return all

used batteries and accumulators; disposal in the household garbage

is prohibited!

You can hand over your used batteries / accumulators at collection

points in your community or wherever batteries / accumulators are sold!

Disposal: Follow the valid legal stipulations in respect of the disposal of

the device at the end of its lifecycle

42270_42260-EU-EN V2.2 7/09

Produkt Specifikationer

Mærke:	Extech
Kategori:	Måling
Model:	42270

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