Issue/Rev. 0.1 (11/18) ║ MNKS025 • Page 79
Inside the enclosure digital input #2, which is located on terminal strip CN2 terminals 3
and 4, provides the hardware seal. The meter is shipped from the factory with a jumper
(J_WM) across the terminals. When removed, no legally relevant parameters may be
changed.
The hardware seal may be wired out to a key switch or other security device supplied
by the customer in order to provide remote activation/deactivation. When this feature
is used, the customer is responsible for complying with appropriate Weights and Mea-
sures requirements.
There is also an encoder switch that may be set (using a screw driver) that allows for
maintenance. Switch position 9 forces the unit to boot to a fixed, documented, IP ad-
dress (for commissioning purposes). Switch position 8 allows for password reset to
factory default values.
6.8.2.
Software Sealing
(Path: Settings > Modes > Electronic Sealing Mode/ Electronic Seal State)
Software sealing is accomplished by a 5 level password system and two program
parameters that control software sealing. Passwords are 4 digit numbers.
The 5 levels are:
(1) Lowest security level (not used)
(2) Diagnostic parameters that are not legally relevant
(3) Commissioning parameters that are not legally relevant, such as serial comm.
parameters
(4) Owner, Legally Relevant parameters
(5) Weights and Measures, Legally Relevant parameters including sealing parameters.
The two parameters that control sealing are in the “Modes” menu under “Settings”.
“Electronic Seal Mode” determines the alarms that are generated by the various checking
facilities. This must be set to “OIML” to comply with the EU-MID sealing requirements.
“Electronic Seal State” determines whether the unit is sealed by password or not.
When set to “Sealed”, no Legally Relevant parameter may be changed. When set to
“Open”, parameters may be changed according to the security level they are assigned.
Security level 4 (Owner) and level 5 (Weights and Measures) may break a seal (switch
from Sealed to Open); only security level 5 (Weights and Measures) may seal the unit
(switch from Open to Sealed). This allows the owner control of the unit, yet allows the
Weights and Measures level to detect the unsealed condition, and then may look into
the logs for changes that have been made.
MPU Series C I/O/M Manual
Web User Interface
Summary of Contents for Smith Meter MPU 1600c
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