AdEM™-PTZ
ROMET LTD. 41
▪ ALARMS & MALFUNCTIONS
In the event when the temperature, pressure or battery malfunction occurs, the display will turn “OFF” while in
Normal Display Mode. If the ESC key is pressed or the scroll button used, the display on the AdEM®-PTZ
will indicate
one of the alarm conditions listed below.
During the temperature or pressure malfunction, the display will show all segments and dots ON (shown below)
when COR VOL parameters are accessed.
(The display with malfunction)
The following are the possible alarms:
Battery Malfunction and Low Battery Alarm
Battery life is expected to exceed 10 years. In many cases it is long enough to last during expected product’s
lifetime. However, if needed, battery can be replaced after gaining access to electronics. Replacement can
be done only by an authorized service technician on the field. The procedure follows next.
Battery malfunction (Low Battery) alarm is a critical alarm that occurs if the main battery supply voltage drops below
2.7 VDC, or calculated capacity will be sufficient for less than 6 months. The battery needs to be changed. Under
this condition the display is "OFF" while in Normal Display Mode and remaining battery life 6 months is reset to 0
months. An alarm output pulse is generated on an hourly basis, along with the flow if exists. Also, an alarm is
registered in Alarm Logger as a Battery Malfunction, which can be read through software. The other functions of
the unit work like normal. “LOW BAT” is displayed on the screen if AdEM®-PTZ is awaked by pressing Scroll Button
or ESC on the keyboard. The alarm detail information can be accessed by software. This alarm must be cleared
manually using AdEM®-PTZ pushbutton or keyboard.
Temperature or Pressure Malfunction Alarm
This alarm condition occurs if the AdEM®-PTZ temperature or Pressure sensor has malfunctioned. When this
condition occurs, the display will turn “OFF” while in Normal Display Mode and the alarm output begins pulsing every
hour while flows occurs, the COR output pulse stops pulsing and the UNC pulse output continues to pulse normally.
“TE MALF” or “PR MALF” is displayed if AdEM®-PTZ is awaked by pressing Scroll Button or ESC of keyboard. The
AdEM®-PTZ continues to integrate the UNC volume, and starts to record this volume in the FULL DISPLAY under
“UNC SINM”. The COR volume since the malfunction occurred can be calculated by applying an estimated Total
Correction to the “UNC SINM” value. The hourly UNC and COR volumes prior to the temperature or Pressure
malfunction are stored in the FULL DISPLAY under “LAST UNC” and “LAST COR” respectively, along with the
corresponding date and time under “LAST DAT” and “LAST TIM”.
Estimation of Corrected Volumes
“UNC SINM” – Uncorrected Volume since Malfunction – Unit (multiplier) is CF or 0.01M3 based on meter
attached.
After malfunction, corrected volumes can be calculated as per following formulas:
For the estimated Corrected Volume (COR VOL):
LAST COR + (TOTAL COR FACTOR x UNC SINCE MALF) = Current COR VOL
How to Clear Malfunction(s) and Install New Battery
Clearing P or T malfunction(s) automatically clears value stored in parameter "UNC SINM". The value of this
parameter is shown in the FULL DISPLAY mode and must be recorded before clearing a malfunction. The
value can also be retrieved from Event Logger that is read by software.
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