V7.1 1/08

3

REC HI LOW COMM

RH%

°C

°F

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’s voltage nears the critical operating level the LCD displays ‘LO’.

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