Veeder-Root EMR3 XStream-PKG, Руководство по установке

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EMR
3
Inhibitors - Provisions for Sealing
The EMR
3
uses a wire with a W & M seal that prohibits tampering with the weights and measures sensitive set-up
and calibration values stored in the Display Head. Once the wire seal is installed, a physical alteration to the
Display Head is required to gain access to the parameters that control the metrological parameters called C&C
(configuration and calibration). If the seal is broken, and power applied, the user may enter the C&C mode.
In the C&C mode, metrological parameters are adjusted and calibration of the meter is performed. When in the
C&C mode, the EMR
3
will not perform a delivery.
Mechanical
The Display Head cover is secured with four bolts that have holes drilled through their heads. A sealing wire is
passed through the holes of two or more of these bolts and secured with a W & M seal (see Figure 41). This wire
sealing method is the same method used to physically seal mechanical registers whereupon removing the cover
destroys the seal.
The extended keypad is sealed by rivets and cannot be opened without destruction of the rivets. The keypad is
affixed to the register housing by means of a fastener that is attached from the inside of the housing. Removing the
optional keypad can not be accomplished without breaking the same seal that secures the Display Head cover.
The Interconnection Box (IB) cover is secured to the IB enclosure by 4 torx screws and a wire with a W & M seal.
The sealing holes are located in both the enclosure box and the cover (see Figure 42). Removing the cover will
destroy the seal.
Electronic
The EMR
3
is protected from any adjustments of metrological parameters by means of the C&C jumper or the C&C
switch located inside the Display Head. During normal operation, there are two terminal positions that must be
electrically connected on the terminal block of the Display Head, positions 16 GND and 17 CCS. Both the C&C
switch and the C&C jumper wire are protected and sealed by the cover of the Display Head housing. Two possible
C&C hardware configurations are used in the EMR
3
.
METHOD 1 - INTERNAL JUMPER WIRE
Jumper Wire: In this configuration a single wire is run between the two terminal positions, 16 and 17. The EMR
3
is
in the normal delivery mode when the jumper is installed. When this jumper wire is connected to the two terminal
positions, an operator cannot make metrological adjustments and cannot calibrate the system. To go into the C&C
mode, remove the jumper from one or both terminals.
METHOD 2 - INTERNAL CORNER SWITCH
This is a normally open switch with a mounting bracket installed in the corner position of the register housing.
When the cover bolt is inserted to secure the cover, it passes through the switch assembly and closes the normally
open switch. Conversely when the bolt is removed the switch opens and C&C access is allowed. When using the
C&C switch assembly, the sealing wire must pass through the bolt used to mount the corner switch assembly.