Setra-system Model ASM Bedienungsanleitung PDF herunterladen (Seite 3)

The current ows into the +EXC terminal and returns back to the power sup-

ply through the -EXC terminal (See Diagram 1). Note: The +SIG Out and -SIG

Out terminals are not used. The power supply must be a DC voltage source

with a voltage range between 9 and 30 VDC measured between the + and

- terminals. The unit is calibrated at the factory with a 24 VDC loop supply

voltage.

3.4 Cable for Bayonet Connectors

For good EMC performance, shielded cable shall be used and grounded to

earth ground. Cable shall only be used within a building and not be longer

than 30 m (100 ft.).

Diagram 1

Electrical Data

Signal Output Ranges 0-5 VDC, 0-10 VDC (4-wire); 4-20mA (2-Wire)

Nominal Excitation 24 VDC

Excitation Range 9-30 VDC (5 VDC & 4-20mA output)

15-30 VDC (10 VDC Output)

Current Consumption <23mA

Circuit Response Time <10ms (Voltage Version),

<80ms (4-20mA Version)

Warm-up, Environmental Within +/-0.02%FS after 15 min. Warm-up Time

Miswiring Reverse Excitation Protection

4.0. CALIBRATION

The ASM transducer is factory calibrated and should require no eld adjust-

ment if mounted in a vertical position. Whenever possible, any zero and/or

span osets should be corrected by software adjustment in the user’s control

system. However, ne zero and span adjustments can be made through use

of Secure-Cal

accessory (purchased separately) for calibration access. The

Model ASM transducer zero oset is trimmed in the vertical position (pressure

port pointing downward) prior to shipping from factory.

4.1 Zero/Span Adjustments with Secure-Cal

To make secure zero and span adjustments, attach SecureCal

accessory to

ASM pressure transducer. (See Diagram 2).

9 to 30 VDC

ASM

Current

Monitoring

Device

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Setra-system Model ASM Bedienungsanleitung Seite 3