User's Guide
Model 42270 Temperature & Humidity Datalogger Module
Model 42275 Temperature & Humidity Datalogger Kit
Model 42260 Temperature Datalogger Module
Model 42265 Temperature Datalogger Kit
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
FAX 781.665.0780 - TestEquipmentDepot.com
Introduction
Congratulations on your purchase of the Extech Datalogging Module or Datalogging kit.
The following models are covered in this manual:
Model 42270: Temperature and Humidity Datalogging Module
Model 42275: Temperature & Humidity Datalogging Module plus docking station & Windows
Model 42260: Temperature-only Datalogging Module
Model 42265: Temperature-only Datalogging Module plus docking station & Windows
TM
Software
TM
Software
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 readings that can later be transferred
to PC or directly printed using the Model 42276 Programmer/Printer. Careful use of this
device will provide years of reliable service.
Activating The Digital Display
The datalogger module display will not switch on until it is placed in the docking station,
connected to the PC, and 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.
Specifications
Display 3-digit multi-function LCD
Front panel status LEDs Two (2): RECORD and ALARM
Temperature range -40 to 185
Temperature resolution 0.1
Temperature accuracy ±1.2
±2.4
Humidity range & accuracy 0.0 to 99.9% Relative Humidity; Accuracy: ± 3%
Datalogger storage 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 (1) CR2 or 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’
Cable length 60’’ (150cm)
Operating Temperature 32 to 104
Operating Humidity 10 to 80% RH (docking station)
Dimensions 4.9 x 3.6" (124 x 92mm)
o
F (-40 to 85oC)
o
up to 99.9o; 1o from 100o to 185o
o
F (0.6oC) from -4 to 122oF (-20 to 50oC)
o
F (1.2oC) all other ranges
o
F (0 to 40oC) (docking station)
2
Model 42270/75 42260/65 Version 3.1 December 2004
Description
Refer to Figure 1.
1. LCD display
2. Mounting hole
3. Docking station
4. Interface Cable
5. Status LEDs
6. Supplied
Software CD
Displays
6
2
3
5
1
4
FIGURE 1
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 communication 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%
o
C
o
F
3
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
FAX 781.665.0780 - TestEquipmentDepot.com
Model 42270/75 42260/65 Version 3.1 December 2004
Loading...