Millennium Enterprises Net Safety MLP-A/AR - Manual (Page 22)

Net Safety Monitoring Inc.
MLP-A/AR/AD-ST1400-25 17
S ELECT D ISPLAY L ANGUAGE
Step 1: After the Restricted Menu the option Select Display Language
YES? displays. Press the Calibration Button or use the Reed Switch
to select.
The flashing
YES confirms the selection.
Step 2: When the required language displays ( English , Espanol , Francais
press the Calibration Button or use the Reed Switch to select.
The flashing YES confirms the selection.
Note: Factory default is English.
A LARMS
Sensor Fault
WARNING:
The fault detection circuitry does not monitor the operation of external response
equipment or the external wiring to these devices. It is important that these
devices be checked periodically to ensure they are operational.
Self-testing circuitry continuously checks for problems that could prevent
proper response. When power is applied, the microcontroller automatically tests
the system to ensure that it is functioning properly. During normal operation, it
continuously monitors the signal from the internal sensor source. In addition, a
"watchdog" timer is maintained to ensure the program is running correctly.
When a system fault is detected, the Status LED will Red Slow flash, the
display show
Sensor Fault and analog output change to 2.5 mA.
Non-standard O2 Levels
When levels >20.9 or <20.9 are detected, the display shows the oxygen level, in
percent, on the left side of the display and the LED will blip green. Current output
will vary, depending on the O2 level.
If an alarm set-point is reached, the %O2 still displays to the left but a High
Alarm or Low Alarm message will scroll to the right and the LED will blip/
blink red. Current output will vary, depending on the O2 level.
O ver range is reached if the O2 level exceeds 25%. The display shows
<25%O2, the LED goes solid red and 20 mA is delivered.
Sensor Life
Depending on various factors, sensor response may slowly deteriorate over
time. If calibration becomes impossible for any reason, the display will show
Fail Cal , the analog output will switch repeatedly between 3.0 mA and 3.3
mA and the Status LED alternates Red and Green flashes.
R ESET
Manual Reset
A Manual Reset is required after a calibration failure or to clear a latched relay
alarm. Simply place and hold the magnet against the Reed Switch or press and
hold the Calibration Button for 3-5 seconds. The unit will return to normal
operation using previous calibration values.
Remote Reset
If Relay Option is set to Latching (refer to "Setting Relay Options" on
page 15) and an open Push Button Switch is connected between the RST
terminal and the COM terminal on the Terminal Board, Remote Reset is
possible. Also refer to "Remote Reset" on page 9 for details.
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