DTU2xx Data Logger Series
User Guide. r. 2.1 | 2021-11-10
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29
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Parameter
Description
Default
Value options
- Temperature sensor
(DMT-12)
- Opening sensor
- Not used
- Temperature sensor
(1-Wire)
- Engine hours counter
- High frequency meter
- Current loop
Active level
Active input level for engine hours counting. This
option is active only when the input type "Engine
Hours" is selected".
closed
- closed
- open
Meter value
Accumulated value of the number of pulses, that is
read from the measuring device. When selecting
the "Temperature sensor" input type, this field dis-
plays not the number of pulses, but the technolog-
ical information on connecting the temperature
sensor.
read from the
metering device
0 and above
Measured resistance
The value of the input resistance measured at the
time of connection to server. This parameter is ap-
plicable only to those types of sensors whose oper-
ation is based on the measurement of resistance.
read from the
metering device
0 and above
Closed contact
resistance
If you select the two-state (level) scheme, the val-
ues of these two parameters should match. When
the NAMUR circuit (four-state) is selected, it is nec-
essary to set different values for the closed and
open states.
- IO1
–
IO4:
3 585 Ohm
500 – 100 000 Ohm
Open contact
resistance
- IO1
–
IO4:
3 585 Ohm
500 – 100 000 Ohm
Input status
Current input status, that is read from the measur-
ing device (non-setting parameter).
Read from the meter
Closed, Opened
Open, short circuit
Emergency
discharge value
Maximum pulse repetition rate at the input for
10 minutes. When the pre-established threshold is
exceeded, data logger will send an alarm message
to the server. If the frequency is 0, discharge con-
trol is disabled.
0 pulses
(discharge control
disabled)
0 – 600 000 000 pulses
Threshold
monitoring
Only for input mode
"Current loop"
The parameter enables the option of monitoring
the maximum and minimum values of the current
at the input, which operates in the
"Current loop" mode.
When the current indicators go beyond the
permissible values, the DTU will transmit alarm
messages to the server. When the values return
within the "normal" range, data logger will also
send notifications to the server.
Switched off
Off , On
Upper threshold
Only for input mode
"Current loop"
The upper limit of the permissible value of the
current at the input. The parameter is intended for
monitoring impermissible
deviations of input current values.
0
0 and above
Lower threshold
Only for input mode
"Current loop"
Lowwer allowable limit value of the current at the
input. The parameter is intended to control invalid
deviations of input current values.
0
0 and above
Hysteresis
Only for input mode
"Current loop"
The parameter sets the delta of deviations from
the threshold values and is designed to protect
the system from repeated tripping in the case
when the current level fluctuates within this delta.
0
0 and above (but not more
than the upper/lower
threshold of values)
