Comark EVt Data Logger - Manual

EVt Quick Reference Guide
LCD Layout
A B C D
E F G H I
MIN
AUTO LOG END
H
L
MAX
MAN
AVG TIME
°C °F

Fig 1 – LCD Layout
A. Alarm Indication
B. Max, Min, Ave Recorded temperature
C. Indicate current Time
D. Indicates current scale
E. Indicates battery status
F. Indicates ready for manual start
G. Indicates ready for automatic start
H. Indicates logging in progress
I. Indicates logging finished
Pre-programmed Task
All EVt loggers will be pre-programmed with a TASK from the factory for immediate use.
The pre-programmed logger TASK is as follows:
Manual Start/Stop enabled
Delayed Start of 30 minutes
Logging Interval of 15 minutes (At 3000 readings this gives a little over 30 days)
Alarms ON
High Alarm set to 41°F (5°C)
Low Alarm set to 33°F (0.5°C)
Scale °F (Easily changed when the data has been downloaded)
Alarm delay 15 minutes
The logger can therefore be activated straight away by using the pre-programmed task or
it can be re-programmed with another TASK as required. There is no need to set
date/time, because a unique feature of the EV software is that it will recognise the time
zone in which it is being downloaded, knowing also which time zone it was programmed,
and will adjust date and time accordingly. Pre-programmed loggers will not display time of
day.
Using EVt1 and EVt2
EVt1 and EVt2 programming is via the EV software.
Please refer to the software-training guide for programming options and the EVt manual
included on the software CD, part numbers EVSW or EVSW/PRO.
Once programmed the LCD on the logger will display either MAN, indicating manual start
programmed or AUTO, indicating that an automatic start has been programmed. The
battery symbol will be displayed constantly to indicate battery condition. Do not use the
logger if only a single bar is showing. Press the blue button to scroll through High alarm
setting, Low alarm setting and back to time of day.
To Start Logging
To start the logger in manual mode press and hold the blue button on the front for 5
seconds. If a delay has been programmed then the logger will indicate ‘dLAY’ on the LCD.
Logging will start automatically at the end of the delay period.
Auto logging requires no manual intervention. The logger will start at the preset time and
date.
During logging the green LED will flash periodically. If an alarm is active then the red LED
will flash. It is possible to interrogate the logger during logging. Press the blue button and
the display will scroll from time to current reading to MAX then MIN, AVG readings. If a
reading is in alarm then the ringing bell symbol will be displayed.
To Stop Logging
Stopping the logger will be either automatic or by pressing and holding down the blue
button for 5 seconds.
After logging has finished the blue button can be pressed again to review the summary.
This will automatically scroll from MAX, to MIN, then AVG, then time in high alarm and
time in low alarm. Additionally the EVt2 will scroll to display the current time.
Time in High or Time in Low Alarm is the cumulative time in hours and minutes that the
logger has been in these alarm conditions irrespective of any alarm time delay
programmed.
Data Retrieval
Press the blue button once to initiate communications. Place the logger in the PC Interface
to download the readings.
EVt1 is now spent and should be returned to the supplier or disposed of correctly. EVt2
can be re-programmed with another TASK.
Handling Instructions
EVt loggers are water and dust proof to IP67 standards. However the loggers should not
be immersed in water to clean. Use a damp cloth to wipe the logger clean with a mild
detergent if necessary. Do not put in a dishwasher.
EVT Display Images
The following images depict examples of various stages of use from standby to finished
logging:
AUTO
H
°F

Fig 2: EVt high alarm setting, auto start, not logging.
LOG MAN
Fig 3: EVt showing manual start activated with delay. Logging not yet started.
LOG
H
MAN
°F

Fig 4: EVt showing reading in high alarm while logging.
END
MAX
°F
Fig 5: EVt logging ended, showing maximum recorded reading as part of automatic scroll feature.
END
L
TIME 
Fig 6: EVt logging ended, showing cumulative time in low alarm as part of automatic scroll feature.
Note: EVt2 has been tested to meet EN12830 TDS1 governing the temperature
monitoring of quick frozen foodstuffs through the supply chain.
Comark Instruments, 52 Hurricane Way, Norwich, Norfolk, NR6 6JB United Kingdom
Tel: +44 844 815 6599 Fax: +44 844 815 6598
www.comarkinstruments.com
Comark Instruments, PO Box 500, Beaverton, OR 97077 USA
Tel: 503 643 5204 Fax: 503 644 5859
www.comarkusa.com
Part No. 18036/6 (11/12)
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