PA-1001A1AP1X [ETC]

SIGNAL CONDITIONER & CONVERTERS; 信号调理器和转换器


型号：	PA-1001A1AP1X
厂家：	ETC
描述：	SIGNAL CONDITIONER & CONVERTERS 信号调理器和转换器转换器
文件：	总11页 (文件大小：189K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

INSTALATION, OPERATION & MAINTENANCE

MANUAL

FOR

PA-1001A Series

SIGNAL CONDITIONER

& CONVERTORS

PA1001A – 7/02

Page 1 of 11

SIGNAL CONDITIONER &

CONVERTERS

PA1001A Series

INTRODUCTION:

The PA1001A series preamplifiers/signal conditioners and converters are suitable for use

with either magnetic or RF type pickup coils and allow convenient interfacing with process

measuring devices and digital electronics.

When used with Magnetic type pickups they accept low level signals and produces a pulse

output, while providing rejection of unwanted noise and false signals.

A RF type pickup reduces the pickup drag associated with conventional magnetic pickups,

resulting in a significant increase in the usable range. The PA1001A series excite a RF type

pickup with a 20KHz signal. Motion of ferrous material is sensed and the motion modulates

the coil field and subsequent conditioning provides a pulse output signal.

The output signal of the PA1001A series have a square pulse wave form, each pulse

representative of an actuator (rotor blade, gear tooth, turbine blade, etc.) passing by the

sensing area of the pickup.

Four output signal options are available:

TTL/CMOS compatible

ii.

Open collector

iii.

iv.

0 to 10VDC square wave and

A square wave that is tied to the input power

The unit is powered by a user supplied 8 to 30 VDC filtered power supply. An on-board

regulator provides the required regulation and noise rejection.

Optional features include factory installed pulse scaling and field installable plug in modules

for Analog output. Pulse scaling provides the user with scaling options of ÷2, ÷4, ÷8, ÷16,

÷32, ÷64, or ÷128, which is useful when a remote device has a maximum count speed that

is less than the pulse-generating device. Analog output provides a current and voltage

outputs proportional to RPM, flow rate etc.

PA1001A – 7/02

Page 2 of 11

CHARACTERISTICS AND SPECIFICATIONS:

POWER INPUT:

•

Voltage: 8-30 VDC

Current Draw: 125mA @ 24VDC, with all options equipped.

Reverse polarity protected

PICKUP INPUT:

RF Pickup:

•

Modulation Carrier Frequency: 20KHz

Input Frequency: 2 Hz to 5KHz, adjustable trigger level

Trigger Sensitivity: 20 millivolt peak to peak (minimum)

Carrier Adjustment: to allow precise tuning of carrier signal to physical environment (e.g. air gap,

wall thickness)

•

Maximum Air Gap: 0.160”

Preferred Coil Inductance: 1.0 milliHenry +/- 10%

Maximum Distance From Pickup To Preamplifier 100 feet

Magnetic Pickup:

•

Input protected, RF and band pass filtered

Input Frequency: 0 to 10KHz, adjustable trigger level

Trigger Sensitivity: 4 millivolt RMS (minimum)

NOTE: At 4mV frequency range 10 Hz to 3KHz

Input Impedance: 40K Ohms (nominal)

•

Maximum Input Signal: 600 Volts RMS

Maximum Distance From Pickup To Preamp: 100 feet

PULSE OUTPUTS:

•

TTL/CMOS (Standard); Fan-out of 5 TTL/CMOS loads

Open Collector: Maximum OFF state voltage 30 VDC

Maximum ON current 0.40 amps

•

0 to 10 VDC square wave

Square wave tied to input voltage

Pulse scaling (option): ÷2, ÷4, ÷8, ÷16, ÷32, ÷64, or ÷128 user selectable.

CURRENT OUTPUT OPTION:

•

Accuracy +/- 0.05% of full-scale +/-200 PPM/°C.

Available range 4 to 20mA.

Output suitable for driving floating or grounded loads.

Maximum loop impedance 500 ohms.

Response time 0.3 seconds for 10 to 90 %.

VOLTAGE OUTPUT OPTION:

•

Accuracy +/- 0.05% of full-scale +/-200 PPM/°C.

Available range 0 to 5VDC or 0 to 10VDC, user selectable.

Impedance less than 10 ohms.

Response time 0.3 seconds for 10 to 90 %.

PA1001A – 7/02

Page 3 of 11

ENVIRONMENTAL:

•

OPERATING: -40°C TO 85°C

STORAGE: -40°C TO 150°C

ENCLOSURES:

•

Unit is intended for mounting in a conduit box and comes with 2 ½” on center mounting holes. An

optional explosion proof or NEMA-4x enclosure is available upon request.

APPROVALS:

•

EN50081-1:1992 Generic Emission Standard

EN50082-2:1995 Generic Immunity Requirements

CE compliant to EMC Directive 89/336/EECfor uses in residential, commercial, light or heavy

industrial environments.

INSTALLATION AND WIRING DETAILS:

In considering the interconnections between the PA1001A and the measurement system some

attention must be given to anticipated noise sources and to the coupling of these noise sources to the

interconnecting wiring.

Noise signals may be coupled into the wiring between the pickup coil, the PA1001A, and the

electronic measuring systems. In general, utilizing a shielded, twisted pair for the interconnection

greatly reduces this coupling. The shield should be grounded on both ends of the cable.

However, even with proper interconnecting cabling, cross talk with other signal lines or power lines

may still occur and should be avoided. Physical isolation of the wiring reduces the chance of

potential problems.

The pickup coil should not be located more than 100 feet from the PA1001A preamplifier. It is

recommended that the PA1001A be installed on or near the pickup coil to assure optimum

performance.

INSTALLATION:

The Model PA1001A should be placed in a convenient location that maintains access to the unit

should repairs or readjustment is required.

Connections to the terminal block should be carefully dressed to avoid having bare wires extend pass

the screw clamp on the terminal block. This is particularly important when the PC card is mounted

within an explosion proof enclosure. Wires should be neatly dressed near bottom of enclosure to

prevent problems when cover is installed.

For compliance with EMI/RFI requirements the pre-amplifier must be installed in a metal enclosure

such as a suitable NEMA 4 (e.g. GUAC) junction box. The enclosure must be properly grounded.

Also a grounding strap is required from the enclosure to the power supply common (pin 7).

The cable entry requires 360° grounding coverage to the enclosure case. This is obtained by using

twisted pair with full braid cable and a cable fitting that provides a metal to metal cable clamping

connection. The insulation of the cables should be stripped back to allow for connection to the

terminal block and allow for the cable fitting to clamp onto the braided shield. Any open areas should

then be covered using foil tape.

In hazardous locations where metal conduit is used, 360° grounding are achieved. All cable shields

should be terminated to the enclosure-grounding stud.

PA1001A – 7/02

Page 4 of 11

Wiring For RF Pickup Coil:

1. Connect a two conductor shielded cable from the pickup to Terminals 5 and 6. Connect the

shield to Terminal 4 (see Figure 1). NOTE: It is also preferable that the pickup coil be grounded

to the shield.

2. Connect a power source, which must be within 8-30 VDC, to Terminals 7 and 8. The Plus

voltage is connected to Terminal 8 and the Return to Terminal 7 (see Figure 1).

3. Connect the Pulse output wire to Terminal 3, and connect the Pulse common to Terminal 4 (see

Figure 1).

4. Set Jumper HD2 (see Figure 3) to the RF position.

5. Configure Jumper HD1 (see Figure 3) to the desired pulse output as follows:

Pulse Output Type

Open Collector

HD1 Jumper Configuration

JP2

Square Wave to Vin

TTL/CMOS

JP1 and JP2

JP1, JP2 and JP3

JP1, JP2 and JP4

0-10 VDC Square Wave

6. Install pickup (e.g. in meter) and provide power to PA1001A. Use a digital voltmeter set to DC

voltage and attach the positive lead to Terminal 6 and the common lead to Terminal 2. Adjust the

Carrier Adjustment (R2) (see Figure 3) to a reading of 3.00 VDC to fine-tune the pickup for air

gap, wall thickness, etc.

7. With power still supplied to PA1001A determine if pulse output is being generated in the absence

of motion. Adjust the RF Trigger (R24) (see Figure 3) clock wise until the false pulsation has

stopped. If pulsation continues when adjusted fully clock wise, check that all shields have been

properly terminated and grounded.

PA1001A – 7/02

Page 5 of 11

Wiring For Magnetic Pickup Coil:

1. Connect a two conductor shielded cable from the pickup to Terminals 1 and 2. Connect the

shield to Terminal 4 (see Figure 2). NOTE: It is also preferable that the pickup coil be grounded

to the shield.

2. Connect a power source, which must be within 8-30 VDC, to Terminals 7 and 8. The Plus

voltage is connected to Terminal 8 and the Return to Terminal 7(see Figure 2).

3. Connect the Pulse output wire to Terminal 3, and connect the Pulse common to Terminal 4 (see

Figure 2).

4. Set Jumper HD2 (see Figure 3) to the MAG position.

5. Configure Jumper HD1 (see Figure 3) to the desired pulse output as follows:

Pulse Output Type

Open Collector

HD1 Jumper Configuration

JP2

Square Wave to Vin

TTL/CMOS

JP1 and JP2

JP1, JP2 and JP3

JP1, JP2 and JP4

0-10 VDC Square Wave

5. Install pickup (e.g. in meter) and provide power to PA1001A. Determine if pulse output

is being generated in the absence of motion. Adjust the MAG Trigger (R19) (see Figure

3) clock wise until the false pulsation has stopped.

PA1001A – 7/02

Page 6 of 11

Analog Output Option:

1. For current output, wire two conductor, shielded cable to terminals 2 (common) and 3 (current

output).

2. For voltage output, wire two conductor, shielded cable to terminals 2 (common) and 1 (voltage

output).

PA1001A – 7/02

Page 7 of 11

CONTROLS AND ADJUSTMENTS:

STANDARD PRE-AMPLIFIER ADJUSTMENTS:

CARRIER ADJUSTMENT:

A twenty turn control used to precisely tune the specific sensing

depth, wall thickness, material type, air gap,

etc. of the RF pickup coil.

RF TRIGGER:

A twenty turn control used to set the trigger level of the

RF coil input above the ambient noise level.

MAG TRIGGER:

COIL SELECTION:

A twenty turn control used to set the trigger level of the

Magnetic coil input above the ambient noise level.

A two-position jumper that is used to select the desired

pickup coils to be used as the input.

Input Coil Type

HD2 Setting

Magnetic

MAG

LIN\RAW PULSE:

A two-position jumper that is used to select the desired

Pulse train.

Pulse Type

JP1 Setting

RAW

Raw pulse train

Linearized pulse train

(NOT AVAILABLE YET)

LIN

PULSE SELECTION:

A four-position jumper that is used to select the

Desired type of pulse output.

Pulse Output Type

Open Collector

HD1 Jumper Settings

JP2

Square Wave to Vin

TTL/CMOS

JP1 and JP2

JP1, JP2 and JP3

JP1, JP2 and JP4

0-10 VDC Square Wave

PULSE SCALING ADJUSTMENTS:

PULSE SCALER:

A 8 position jumper header located on PA1001 circuit board which is

used in programming the desired pulse output scaling (Division of 1,

2, 4, 8, 16, 32, 64, or 128). Factory set with division of 1 as standard.

PA1001A – 7/02

Page 8 of 11

ANALOG OUTPUT ADJUSTMENTS (PCA-121):

20mA ADJ

A twenty turn adjustment which is used to set current output to the

desired span corresponding to the equivalent full scale range. (i.e.

20 mA at 100 RPM).

4mA ADJ

V_FSADJ

A twenty-turn adjustment that is used to set the current output signal

to the desired zero value. (i.e. 4mA at zero RPM).

A twenty-turn adjustment that is used to set the voltage output to the

desired span corresponding to the equivalent full scale range. (i.e.

5VDC or 10 VDC at 100 RPM).

V_OADJ

A twenty-turn adjustment that is used to set the voltage output signal

to the desired zero value. (i.e. 0 VDC at zero RPM).

COARSE RANGE ADJ

A dual in line DIP switch which is located on the PCA-121 board,

which is used to perform a coarse range adjustment for the input

frequency range.

V_FSSELECTION

A two position jumper (JP1) that is used to select the desired voltage

output range of either 0 to 5VDC or 0 to 10VDC.

CALIBRATION PROCEDURE:

In order to perform field calibration and troubleshoot the PA1001A, the following equipments are

recommended.

MANUFACTURER

Fluke

PART NUMBER

8060A

DESCRIPTION

True RMS Multimeter

Digital Function Generator

Multi Function Counter

Adjustment Tool

Topward

Viz

8112

WD-755

8-TOOO

Spectrol

Table - 1

(Coarse Range Adjustment):

Frequency Range

Switch

Position

50 to 100Hz

100 to 200Hz

200 to 400Hz

400 to 800Hz

800 to 1600Hz

1600 to 3200Hz

3200 to 6400Hz

6400 to 12800Hz

PA1001A – 7/02

Page 9 of 11

FOR CURRENT OUTPUT:

•

Connect a digital milliampmeter or equivalent, across the current output terminals.

On the PCA-121 select the “Coarse Range Adj” that corresponds to the maximum input

frequency. Refer to Table - 1 for selection options.

•

Adjust “4mA ADJ” control for desired “Zero” current (i.e. 4mA).

Inject the full-scale test frequency while adjusting “20mA ADJ” for current equal to SET (SPAN).

Iterate above steps until no change is observed.

FOR VOLTAGE OUTPUT:

NOTE: For proper adjustment of the voltage-output, First

Perform calibration of the current output.

•

Connect a digital voltmeter across the voltage output terminals.

On the PCA-121 select the “Coarse Range Adj” that corresponds to the maximum input

frequency. Refer to Table -1 for selection options.

•

Adjust “V_OADJ” for 0.00 volts).

Inject the test frequency while adjusting “V_FSADJ” for voltage equal to SET (SPAN).

Iterate above steps until no change is observed.

Control and Adjustment Detail for the PCA-121

PA1001A – 7/02

Page 10 of 11

Ordering Information

PA-1001A

Series:

Options:

1 = Pulse Output

1A = Pulse and Analog output

1PS = With pulse scaling

Mounting:

C = Explosion Proof Enclosure

B = Nema-4X Enclosure

P = Panel Mount

Operating Voltage:

1 = 24 VDC (8 to 30 VDC)

2 = 110 VAC 50/60 Hz

3 = 220 VAC 50/60 Hz

Electrical Interface

W = Mounted Integral to Flowmeter

X = 10 feet cable attached to mating connector

Y = 25 feet cable attached to mating connector

Z = Customer Specific Length (250 feet max.)

Ordering Information For

PCA-121 For Digi-Pulse Pickup

PCA-121

Series:

Mounting:

C = Explosion Proof Enclosure

B = Nema-4X Enclosure

P = Panel Mount

Operating Voltage:

1 = 24 VDC (8 to 30 VDC)

2 = 110 VAC 50/60 Hz

3 = 220 VAC 50/60 Hz

PA1001A – 7/02

Page 11 of 11

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