6 34-ST-25-19 RMA 3000 Remote Meter Assemblies User Manual Release 1
6/04
SM Meter Assembly
The SM 3000 Meter assembly includes an integral filter plate and an associated mounting plate in the
flameproof/explosion-proof housing as shown in Figure 5. To install an SM 3000 Smart Meter:
• Remove the cap from the housing.
• Rotate the meter assembly counter-clockwise until it can be pulled from the mounting plate in the
housing.
• Connect field wiring to the terminal block in the housing.
• Align four stand-offs on the bottom of the meter assembly with holes in the mounting plate, insert
bottom of stand-offs in the holes, and turn the meter assembly clockwise to lock it in place. Ensure
that the meter is oriented properly for viewing through the cap window.
• Lubricate the threads and the o-ring on the meter housing with a silicone grease such as Dow #33 or
equivalent.
• Replace the cap.
Figure 5 SM 3000 Meter Assembly for CE Mark
Specific Parameters of the Mode of Protection (Intrinsic Safety)
The specific parameters for the mode of protection (Intrinsic Safety) for the Analog Meter (ME) and for the
Smart meter (SM) are as follows:
At field wiring terminals (+ and -):
With local Analog Meter (ME):
with local Smart Meter (SM):
Ui ≤ 30 V, Li ≤ 100 mA, Pi ≤ 1.2 W
Ci ≈ 0 (negligible); Ri ≈ 0; Li ≤ 150 µH
Ci ≈ 18 nF; Ri ≈ 0; Li ≈ 0 (negligible)
A diagram of the field connections in from the flameproof/explosion-proof housing is given in Figure 6.
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