Sensia CD20 Bedienungsanleitung
CLIF MOCK™
CD-20 Sample Probe Controller
User Manual
Manual No. 2350752-01, Rev. 02
Class I Groups C and D
Hazardous Locations
Important Safety Information
Symbols and Terms Used in this Manual
!WARNING: This symbol identies information about practices or circumstances that can lead to per-
sonal injury or death, property damage, or economic loss.
CAUTION: Indicates actions or procedures which if not performed correctly may lead to personal
injury or incorrect function of the instrument or connected equipment.
Important: Indicates actions or procedures which may affect instrument operation or may lead to an
instrument response which is not planned.
This product must be operated within the parameters stated in this manual and in conjunction with
the ratings printed on the product serial tag.
All Rights Reserved.
Printed in the United States of America.
Manual No. 2350752-01, Rev. 02
September 2013
iii
CD-20 Sample Probe Controller Table of Contents
Contents
Important Safety Information ...............................................................................................................................ii
Section 1—Overview .......................................................................................................................................... 5
How It Works ................................................................................................................................................ 6
Hazardous Location Safety Compliance ...................................................................................................... 6
Table 1.1—CD-20 Specications ................................................................................................................. 7
Section 2—Installation and Wiring...................................................................................................................... 7
Section 3—Maintenance .................................................................................................................................... 9
Operational Test ........................................................................................................................................... 9
Repeat Mode (Time-Proportional) Check-Out ........................................................................................... 10
External Pulse Mode (Flow-Proportional) Check-Out ................................................................................ 10
Sample Probe and CD-20 Check-Out ........................................................................................................ 10
Motor Control Assembly ..............................................................................................................................11
Table 3.1—Troubleshooting Tips for 12VDC/24VDC Controllers .............................................................. 12
Table 3.2—Troubleshooting Tips for 115VAC/230VAC Controllers ............................................................ 13
Factory Repairs .......................................................................................................................................... 14
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Table of Contents CD-20 Sample Probe Controller
5
CD-20 Sample Probe Controller
Section 1—Overview
The CD-20 Sample Probe Controller is engineered for use with the True-Cut C-Series sample probe. It
provides both pulse input (ow proportional) and repeat (time proportional) control of the sample probe.
When a “start” pulse is received, the probe is rotated to capture and discharge a 1.5-ml isokinetic sample.
When installed in a horizontal line, the probe is stopped in the closed position, while on a vertical line the
probe is stopped in the open position.
The C21 probe collects one 1.5 cc sample per 360-degree rotation.
The C22 probe collects two 1.5 cc samples per 360-degree rotation.
An explosion-proof housing encloses the complete assembly, and two ¾-in. NPT holes allow connection of
the line power and input pulse (for ow-proportional sampling). A ½-in. breather plug and a ½-in. conduit
plug are installed on opposite sides of the enclosure.
A coupling, jam nut, and hub allow the assembly to be mounted directly to the C-Series sample probe. No
brackets or supports are required; however, they are recommended for piping with signicant vibration.
The CD-20 controller (Figure 1.1) consists of the following:
• a motor control assembly (12VDC, 24VDC, 115VAC, or 230VAC)
• a DC gear motor with a gear ratio of 150:1
• a cam with two high points mounted on the gear motor output shaft
• a proximity switch
Figure 1.1—CD-20 controller components
6
CD-20 Sample Probe Controller
The motor control assembly (Figure 1.2) consists of a control card and power board mounted to a ring, which
in turn, is mounted to the back of the CD-20 gear motor. All eld connections are to terminal block 1TB on
the control card. The motor and proximity switch connections are made at the factory to terminal block 2TB
on the power board.
CD20 Power Board
(2TB)
CD20 Control Card
(1TB)
Figure 1.2—CD-20 motor control assembly
How It Works
When an input pulse from either the repeat-mode timer or an external pulse source is received, a command
is output to rotate the motor. Armature feedback controls the speed of the motor at about 12 rpm and current
feedback limits motor current to 3 amperes.
Time-proportional sampling may be congured for a sampling frequency of 3 seconds to 3 minutes.
Flow-proportional sampling requires that the pulse input be closed for at least 5 msec to produce a “start”
pulse. An electronic square wave input must have an amplitude of 12VDC.
The proximity switch input amplier provides the signal to stop the motor. Two LEDs installed on the
controller card allow the user to test the controller’s operation. The I-LIMIT LED is on when the drive is in
current limit, which is normal during acceleration.The PROX (“Hold”) LED is on when the motor is stopped.
Field wiring instructions are provided in Section 2—Installation and Wiring, page 7. A signal verifying the
180-degree rotation of the motor can be transmitted to a control room if desired.
Hazardous Location Safety Compliance
Assemblies designed for 24VDC, 115VAC and 230VAC input power are UL-listed in the US and Canada for
Class I Groups C and D Hazardous Locations.
A 12VDC controller is available without the UL listing.
7
CD-20 Sample Probe Controller
Table 1.1—CD-20 Specications
24 VDC 115/230 VAC
Temperature -40ºC to 55ºC -40ºC to 55ºC
Voltage 24VDC @2A max 115 / 230 VAC @ 1A max
Pulse Input 12VDC 12VDC
Transistor Output 12VDC max @ 100mA max 12VDC max @ 100mA max
Current Draw (Controller)
Stop Mode 30 mA 60 mA
Running Mode 0.5 Amp 150 mA
Peak Motor (Turn On) Current 1 Amp 300 mA
Current Draw (Motor)
Motor (Turn On) Current 320 mA 850 mA
Section 2—Installation and Wiring
!WARNING: This module is designed for connection to hazardous electric voltages. Ignoring
this warning can result in severe personal injury or mechanical damage. This product must
be reliably earthed and installed by qualied personnel in accordance with the prevailing local
electrical wiring regulations and safety standards.
The CD-20 controller mounts directly to the C-Series sample probe via the DC-2 coupling (Figure 2.1). The
DC-2 coupling should be hand-tightened to ensure that the internal retaining ring is not pushed out of its
groove. If the DC-2 coupling is over-tightened at the CD-20 hub, the motor shaft will not engage the DC-1
coupling on the probe.
Figure 2.1—DC-2 coupling
All eld connections are made to terminal block 1TB on the control card (Figure 2.2). Install wiring as
follows:
1. Connect power to 1TB-1 and 1TB-2.
2. Connect the ow pulse input contact to 1TB-5 and 1TB-6. If an open collector transistor driver is used,
connect the collector to 1TB-5 and connect the emitter to 1TB-6 (common).
8
CD-20 Sample Probe Controller
Note The input pulse contact must be closed for at least 5 msec to produce a start pulse. An electronic
square wave input must have a pulse amplitude of 12VDC. A 5VDC square wave will not work.
1TB-6 = Pulse Input (Emitter) ( )-
1TB-5 = Pulse Input (Collector) (+)
1TB-4 = Jumper E1 (Repeat)
1TB-9 = Transistor Output (Emitter) ( )-
1TB-8 = Transistor Output (Collector) (+)
1TB-3 = (External Pulsed)
1TB-7 = +12VDC Output
1TB-2 (N)
1TB-1 (H)
115VAC or
230VAC Power
W1 and W2
jumpers
1TB-2 (-)
1TB-1 (+)
12VDC or
24VDC Power
Figure 2.2—Field wiring of CD-20 controller
3. Congure the on-board jumper E1 to select the source of “start” pulses for the CD-20 control logic.
– For external pulsed mode, connect jumper E1 to 1TB-3.
– For the repeat mode (time-proportional sampling), connect jumper E1 to 1TB-4, as shown in Figure
2.2.
4. To power an external ow pulse circuit such as a turbine meter pre-amplier, connect the instrument to
the +12VDC output at 1TB-7. Maximum current from this supply is 50 mA.
5. If a signal verifying the rotation of the motor is desired in a control room, connect the transistor output
contact to 1TB-8 (collector) and 1TB-9 (emitter). Check the position of jumpers W1 and W2 to designate
whether the transistor will turn on or off when the proximity switch is opposite the high point on the cam
(Figure 2.3, page 9).
9
CD-20 Sample Probe Controller
PROX “Hold” LED
Repeat time
potentiometer
I-Limit LED
W2 jumper: transistor
is ON when the proximity
switch is opposite the
high point on the cam.
W1 jumper: transistor
is OFF when the proximity
switch is opposite the
high point on the cam.
Figure 2.3—CD-20 control card, full view
Section 3—Maintenance
Operational Test
The start-up procedure consists of three steps: a repeat-mode checkout, an external input pulse mode
checkout, and a sample probe/control drive checkout. The following user-supplied equipment is required to
complete these tests:
• push-button switch
• power supply
• a 100-ml graduated beaker or other applicable measuring device
Note If the CD20A controller is connected to a sample probe, disconnect it before performing the following
procedures.
10
CD-20 Sample Probe Controller
Repeat Mode (Time-Proportional) Check-Out
The repeat time potentiometer (Figure 2.3), which determines the rate of sampling when the controller is
connected to a probe, is typically set at the factory at 15 seconds. However, it can be adjusted over a range of
3 seconds to 3 minutes.
To perform the repeat mode check-out,
1. Connect jumper E1 to terminal 1TB-4 (Figure 2.2, page 8).
2. Apply input power to the CD-20 control card. Input power will be 12VDC, 24VDC, 115VAC or 230VAC,
depending on the controller model purchased.
3. Verify that the motor rotates 180 degrees and stops. This should take approximately 2.5 seconds. The pro-
cess should repeat at regular intervals as determined by the potentiometer (off delay) setting.
Note—Any input pulses that occur when the CD-20SFA is rotating are disregarded by the control logic.
4. Verify that the PROX (“Hold”) LED is on while the motor is stopped.The PROX (“Hold”) LED should be
off while the motor is running and turn on when the motor stops.
5. Verify the I-LIMIT LED blinks on momentarily during acceleration of the CD-20 motor. After the motor
reaches the 12 RPM running speed, the I-LIMIT LED should turn off.
6. Verify the CD-20 output shaft rotates in a clockwise direction as you look at the shaft from the bottom of
the CD20. The sample probe will rotate counterclockwise when the CD-20 controller is connected. If the
direction of motor rotation is wrong, swap the motor armature leads at 2TB-1 and 2TB-2.
External Pulse Mode (Flow-Proportional) Check-Out
1. Disconnect the input power from the CD-20.
2. Move the E1 jumper to 1TB-3 to select the external pulse input mode (Figure 2.2, page 8).
3. Connect a push-button switch to 1TB-5 and 1TB-6.
4. Apply power to the CD-20 control card.
5. Activate the switch to generate a pulse input to the motor control assembly. To be registered by the con-
trol logic, the input pulse must have a duration of 5 msec or longer and it must occur when the CD-20 mo-
tor is stopped and the PROX (“Hold”) LED is on.
6. Verify the CD-20 output shaft rotates 180 degrees for each external pulse.
Note—Any input pulses that occur when the CD-20 is rotating are disregarded by the control logic.
Sample Probe and CD-20 Check-Out
1. Disconnect input power from the CD-20.
2. Mount the CD-20 to the sample probe and hand-tighten the DC-2 coupling.
3. Make sure the push-button switch is still connected to 1TB-5 and 1TB-6.
4. Verify that the product line is full and pressurized.
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