1. Due EOL means the sensor end of life in days, When the value reaches 0 the sensor can no longer
read the target gas.
5. MODBUS: for G20 and G20 RTx using MODBUS, we
recommend to use a StartAddress and a DeviceID of 1
and a baudrate of 9600. Please note that for G20 RTx,
MODBUS and 4G Modem are mutually exclusive; users
can only make one selection.
6. For G20 RTx, using the 4G Modem, ensure the antenna
installation has been completed and then, set up the 4G
Modem and the Alarm triggers:
• The Modem Settings include the Access Point Name
(APN), the FTP Server Setting and SMS information for the
receipt of Alarms
• The Alarm Triggers allow users to set LOW, AVERAGE, and
HIGH gas concentration threshold values, to trigger an
email or SMS message.
Note that the Odalog software does not automatically activate
the Modem. Please follow the next step to start the modem.
Enabling the Modem (G20 RTx)
1. The G20 RTx unit will not send data or SMS message after
the initial configuration nor on first enabling logging; you
must also enable the Modem on the unit.
2. Place the magnetic tip near the “Menu” marking on the
yellow label, hold it there until “Transmit ON” appears, then
remove the magnetic end.
3. G20 RTx will send a TEST SMS when enabling the
modem for the first time and then send FTP data per
the transmission interval. An SMS trigger will happen if
gas level alarm is set in the configuration and a trigger
threshold is reached.
Care of the Odalog G20
Unit Retrieval
The new Odalog G20 unit can be deployed in the field for up
to 3 months before needing to dry the sensor3. At this time, the
unit may require battery replacement.
NOTE: When deployment time of G20 depends upon the site
temperature/humidity and the sampling rate. Humidity affects
the sensor, while the temperature and sampling time affects the
battery consumption.
When retrieving the unit from the field, please ensure to carry
out a decontamination process and clean the unit before doing
any work.
Downloading the Data
Users can download the data directly from the unit using a USB
cable or Bluetooth connection. It is also possible to retrieve the
data from the FTP server via the OdaStat-NX application.
Users can check the data download details in this manual
within the “OdaStat NX” section.
Drying the Sensor
After retrieving the unit from the field, a drying process must
commence to removing excess moisture from the sensor.
A rule of thumb, the drying time should equal the
deployment time.
For example, if the deployment time is 75 days, the drying time
should use the same time frame in an air-conditioned room
(humidity approx. 50%). Utilizing a special drying chamber
(chamber humidity approx. 25%) can reduce the drying time
by 30%.
2. Due Cal is the sensor recalibration flag. When the value reaches 0 the sensor can no longer read
the target gas.
3. Electrochemical cells need a drying cycle in between deployment periods for removing the
absorbed humidity.
Odalog Display
This section describes a brief operating procedure for the
Odalog G20 and G20 RTx, covering the basics of all
primary functionality. These functionalities are accessible
from the screen menu; use a magnetic tipped screwdriver to
make your selection.
There are three locations for the magnetic switches: "Menu"
and "No" on the right side of the screen, and "Yes" on the left
side of the screen (see Figure 5).
Figure 5. Front Label
LCD Layout
Figure 6. 7-Segment Display
Following are the parameters displayed on the LCD of the
Odalog loggers:
1. Lower 7-segment characters: Displays gas readings
and status values which are usually numerical digits, some
supplemental menu headings and prompts.
2. Upper 14-segment characters: Displays menu
headings, prompts and other visual feedback, usually
alphabetic characters and some numerical values
displayed on screens.
3. Battery Level Indicator: It displays the battery levels in 4
stages of depletion.
Figure 7. Four Stages of Battery Depletion
Operation
P1, P2, and P3 are the segments to display the battery
percentage, as shown in Figure 7. The battery percentage
display appears on all screens.
• Stage 1 have the logging and communication active
(voltage > 3.2 V).
• Stage 2 have the logging and USB communication active;
the Bluetooth may become inactive after some time
(3.2 V > voltage > 3.1 V).
• Stage 3 have the logging active but no communication
(3.1 V > voltage > 3.0 V).
• Stage 4 have all functions inactive (voltage is ≤ 3.0V).
4. Communications Symbol: This symbol indicates if
the instrument is enabled, or successfully connected, or
transferring data.
• On G20 RTx’s INST screen: The symbol may also
indicate the approximate “signal strength” of the last
transmission to the FTP server.
5. Logging Symbol: This symbol flashing indicates that the
instrument is Logging.
Note: Flashing interval does not indicate
logging interval.
6. % (Percentage): This symbol shows any units or
screens that display units as a percentage (not used at
this moment).
7. °C/ °F (Temperature units): These symbols indicate the
temperature readings on the screen in degrees Centigrade
or Fahrenheit, depending on the setting chosen in the
Odastat-NX software package [Default = ºC].
8. ppb/ppm (Gas Reading units): These symbols indicate
if gas readings shown are in “parts per million” or “parts
per billion”. [‘ppb’ is disabled in Odalog Logger G20 and
G20 RTx series instruments].
Odalog Portable Gas Loggers
Operation | 1514 | Quick Start Guide
Odalog Portable Gas Loggers
