USER MANUAL G-913-P01
PAGE
6
PPUH „GECO” Sp. z o.o. ISSUE I
AS OF 2018.09.13
5.2
Description of the conditions for transitions between states:
From
POWERUP
(after about 5 seconds from turning on a power supply):
to
RUN
mode – after making sensor calibration and stabilization of power supply
from
RUN
mode:
to
ALARM
mode – after detecting a fault of one of the sensors
from
ALARM
mode:
to
RUN
mode –
when the sensor failure is removed
6
WORKING IN ALARM MODE
When the sensor failure is detected G-913 recorder is moving to
ALARM
state. This is signaled
by quick flashing of the LED in the specific sequence:
1 blink -> break - short circuit of the NTC-1 sensor
2 flashes -> break - opening the NTC-1 sensor
3 flashes -> break - short circuit of the NTC-2 sensor
4 flashes -> break - opening the NTC-2 sensor
If more than one alarm occurs, the alarm codes are displayed one after another. The alarm states
are recorded in the register as
Err +
(sensor opening) and
Err
(sensor short-circuit) instead of the
registered temperature.
7
POWER LOSS
If the recorder detects a loss of the main power supply, after the voltage recovery,
information about the date and time of the power supply return and the duration of the decay is
recorded in the log.
During the power outage, the recorder works on an internal built-in lithium-polymer battery.
The device "falls asleep" to avoid unnecessarily discharging the battery. During battery operation,
the recorder wakes up every 2.5 minutes to make an emergency temperature reading. Each time
an emergency temperature record is registered, and finally a "Power down!"
8
STANDARD WORK
The device has the task of recording the indications from two temperature sensors. The
device starts to work after approx. 5 seconds. since the power is detected, the recorder performs
the first measurement. Each subsequent measurement is saved at a specific frequency (default: 5
min). The device can store 30,000 measurements. Data recording is circular, i.e. after overflow of
memory the oldest measurements are overwritten, thus the last 30000 measurements are
constantly stored in memory. Mixing data to a USB drive does not delete them from the recorder.
Each correct data registration is confirmed by a short blink of the diode.
During the operation of the device, it is possible to read the measurement register at any time,
and change the date and time settings.
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