Meriam M334 4-20 Milliamp Loop Calibrator Manual de usuario descargar pdf (Pagina 3)

mA OUT, % OUT (Percent of 4 to 20 mA)

Choose this function to provide an output from 0.00 to 24.00 milliamps. The compliance voltage is a

nominal 24 VDC to provide the driving power to your milliamp receivers.

1) Disconnect one or both input wires from

the device to be calibrated.

2) Select “mA” or “% 4 to 20mA” with slide

switch

3) Select “SOURCE” using slide switch w.

4) Connect the output leads of the Meriam

Model M334 to the inputs of the device

being calibrated, making sure to check

polarity. Red lead to the plus (+) input

and black lead to the minus (-) input.

The output is adjusted by turning knob

while the EZ-CHECK™ switch e is in the

“DIAL” position, or the current can be set

at the fixed points of 4.00mA (0.0%) or

20.00mA (100.0%) with switch

READ mA, READ % (Percent of 4 to 20 mA)

Choose this function to measure from 0.00 to +52.00 milliamps or -25.0 to 300.0%.

1) Open the current loop at any conve-

nient point along the signal path.

2) Select “mA” or “% 4 to 20mA” with

slide switch

3) Select “Read” using slide switch w.

4) Connect the red input lead (+) of the

Meriam Model M334 to the more

positive point of the break and the

black input.

Signals below 0 mA or open circuits are

indicated by 0.00 mA (-25.0%) on the

display. Signals above 52 mA are current

limited by protection circuitry.

Sourcing Milliamps

Reading Milliamp Outputs

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Meriam Process Technologies

10920 Madison Ave. • Cleveland, OH 44102 Tel: 216.281.1100 • Fax: 216.281.0228 • [email protected] • www.meriam.com

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Meriam M334 4-20 Milliamp Loop Calibrator Manual de usuario Pagina 3

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