18
SPECIFICATIONS – GX MODEL
Applications:
Use for indoor or outdoor applications where occasional
moisture is common.
Materials:
Acetal, Amorphous Nylon, Silicone Rubber, Polyester (de-
cals), Viton (gasket & seals), Stainless Steel (fasteners).
Power Source:
2-wire, loop powered. 8.5 VDC to 35 VDC loop voltage re-
quired for correct operation.
Outputs
*
:
Analog Primary: 4-20 mA current loop. With loop voltage
maintained within specified limits, will maintain advertised
linearity over 4 mA to 20 mA range, with good linearity in
over-range conditions to about 1.5 mA and 25 mA.
Analog Auxiliary: 0 to 5 VDC. Relationship to primary current
output: V (volts) = l (ma) ÷ 5 . Will maintain advertised linearity
over 0.8 V to 4.0 V range, with good linearity in over-range
conditions to about 0.1 V and 4.9 V.
Recommended minimum driven impedance = 10K Ohms.
Digital (Pulse-Out): Open Collector, square wave. Will switch
up to 60 V and up to 200 mA. Closed circuit voltage drop
typically 0.1 V; guaranteed less than 0.5 V at any current up
to 200 mA.
Configuration:
2-Totals (1 cumulative and 1 batch), Rate, 2 Cals (Factory
calibration, field calibration).
Time Base:
Minutes
Unit of Measure:
U.S. gallons, litres or cubic feet.
Accuracy/Performance:
Possible conversion error, in addition to any inaccuracy of
coupled flowmeter, as follows:
Max. Conversion Error: (Nonlinearity plus span, any input,
loop current output, 0° C to +70° C, loop voltage supply
12 VDC to 24 VDC) 0.5% of span plus possible resolution
uncertainty.
Max. Conversion Resolution Uncertainty: (Loop current
output, when properly calibrated) Larger of 0.1 mA or
[20 mA / (10 x ( f
20
–f
4
)]. Where f
20
= frequency at 20 mA,
f
4
= frequency at 4 mA.
Speed of Response: After step change in input frequency,
loop output guaranteed stable within 3 x accumulating time
(Accumulating time user selectable from 0.3 sec, 0.7 sec,
1.3 sec, 2.6 sec, 5.2 sec).
Frequency Range:
0.25 to 1,000 hertz
Batch Total:
Up to 999,999 x 100 (99,999,999)
Cumulative Total:
Up to 999,999 x 100 (99,999,999)
Temperature:
Ambient Temperature: +32° F to +140° F (0° C to +60° C)
Cable:
20 ft., 3 conductor, shielded (Belden 9363).
Mechanical Connections:
Display is mounted directly to flow meter body via 1-inch NPT.
Electrical Connections:
One strain relief port: one threaded plug (1/2 x 20).
Weight:
1.1 lb. (.5 kg) (Additional)
*
If you want to use the 4-20 mA output and one or both of the other outputs
at the same time, you must provide electrical isolation between the current loop
and all other circuit elements. Failure to do so will result in incorrect 4-20 mA
signal conversion, and possible damage to the unit.
Summary of Contents for TM Series
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