Smith Meter
®
Totalizer / Rate Meter
The
MMRT
is a combination explosion-proof totalizer and
rate meter. The unit has two eight-digit totalizers, one being
an accumulated non-resettable totalizer and the other being
an eight-digit resettable batch totalizer. The non-resettable
totalizer can be toggled from the totalizer to the rate meter
via a reed switch activated by a magnet located within the
explosion-proof housing. The MMRT has a programmable
scaler and decimal point which allows the displaying of
totals and rate in any engineering terms.
Uses
The MMRT can be used with a variety of meters,
including:
•
PRIME 4 meters
•
PD meters with transmitters
•
Turbine meters
• Mass meters
Features
•
Eight-digit non-resettable totalizer
•
Eight-digit resettable totalizer
•
Flow rate indicator (on demand)
•
Explosion-proof
•
Programmable scaler and decimal point
•
CE-compliant
Typical Application
The MMRT has the ability to provide a local non-resettable
totalizer, a resettable totalizer, and a flow rate indicator
on a meter that provides an electronic output. The meters
that provide a direct electronic output are the Smith Meter
PRIME 4 meter, the mass meter, the turbine meter, and the
multi-viscosity turbine meters. This unit can also be used
with positive displacement meters that have a
transmitter mounted on them.
Specifications
Accuracy:
100% when operated within specifications
Power
Internal Battery:
3V, Lithium
Life Expectancy:
3 years +
Inputs
Pulse Input
Type:
Low speed (contact closures to DC common
Speed:
0 to 20 Hz
Minimum Low Time:
10 milliseconds
Minimum High Time:
40 milliseconds
Impedance:
101 K Ω
Voltage Thresholds:
Low 0 to 0.4 VDC
High 2.0 to 28 VDC
Maximum High 28 VDC
Type:
High speed (requires a voltage source,
i.e., current sourcing sensor or a current
sinking sensor used with the provided
pullup resistors)
Speed:
0 to 10 KHz
Minimum Low Time:
80 microseconds
SPECIFICATIONS / INSTALLATION /OPERATION
MMRT
Bulletin SS09040 Issue/Rev. 0.2 (10/14)
