Temperature recorder and printer
10
C
HAPTER
3 O
PERATION
This chapter explains how to operate the VLTS, and includes the following topics:
▲
Displaying reading values
▲
Printing
▲
Deleting all readings from the internal memory
▲
Copying data to external memory
▲
Alarm indication
D
ISPLAYING
M
EASUREMENT
V
ALUES
To turn on the VLTS, press the
key for 2 seconds. The system version will be displayed for 5
seconds and then the 4-channel screen and the POWER light will be on. If a channel deviates
from its settings, the channel value will flash, the ALARM light will come on and other alerts, if
set, such as alarm contact, buzzer (to mute, press the
key), and in the VLTSC cellular
model, also SMS messages, will be activated. For
"Setting Sensor Types", see page 18. For Alarm
Settings, see page 20. The channel name in the display consists of a letter representing the
sensor and the number of the channel. The memory contains up to 35,040 recent readings per
channel. The data range in the memory depends on the sampling. For example: in 15-minute
sampling, the memory will contain data from 4 channels, one year back.
Viewing the current reading, daily minimum and maximum
▲
Displaying current value
–
after switching on, 4 channels will appear on the display
simultaneously. In the VLTSC cellular model, a graduated sign indicating cellular reception
strength will also show, and in the center of the lower row, also an indication for GPS
reception.
▲
Displaying the daily minimum/maximum value (min/max)
–
Press
, and
sensor
value, Daily min and max
will be displayed. Press
to confirm. The minimum and
maximum values for channel 1 will be displayed.
To display minimum and maximum values for another channel (1-4), scroll with
/
.
▲
To exit and view the 4-channel screen
–
double-press
. If for 30 seconds nothing is
pressed, the current value of the 4 channels will be displayed.
Minimum and maximum data
are automatically reset every day. They can be printed
automatically every day before they are reset. The default reset time is 8:00 AM. To change
the time and set
printing daily min/max data and reset
, see
on page 24.
Notes: The minimum and maximum data in memory are the extreme values from continuous
measurement and therefore there may be more extreme values than the sampling
data in memory.
The dry circuit/contact channel will show which of the ON/OFF events took place.
Display Format of values and alerts
The display shows 4 channels simultaneously. Each channel has a name that includes the channel
letter and number, the measured value and the units of measurement. The channel letter
represents the type of sensor: H - humidity; T - temperature; V - voltage; I - current; S -