FLATBED AGITATION SYSTEM MANUAL

MODELS PFS42 and PFS84

VERSION A

Operation Service - Maintenance

HELMER LABS, INC. 15425 HERRIMAN BLVD., NOBLESVILLE, IN 46060 USA PHONE (317) 773-9073 FAX (317) 773-9082

USA and CANADA 1-800-743-5637

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INSTALLATION

1. Place your new flatbed agitator in an area that is free from direct sunlight or temperature fluctuations.

2. Plug the power cord into a standard grounded power outlet. See the label on the back of the unit

for correct electrical requirements. 3. An additional top shelf is included with the unit for storage of extra or larger bags. The top shelf

is pre-assembled and ready to use. (If you are installing the flatbed agitator in an incubator or an area that restricts the height you have the option of removing this top shelf.)

4. The motor is turned on and off with the switch located on the front of the unit. 5. Platelet bags are laid flat on the drawer shelves. It is highly recommended to avoid stacking of

platelet bags so that maximum air circulation may be maintained. 6. The drawers may be removed by sliding them all the way forward, pressing in the two spring-

loaded stops (located in the plastic drawer guides on each side of the drawer), and then pulling the drawer out.

7. The drawers slide easiest when both hands are spaced evenly on the drawer handle. Lightly lift

up on the drawer handle when sliding it in or out. If the drawers should "stick" when accessing, do not force them! Gently move them back to their beginning position and start again.

8. Do not set your unit on any material that could prevent air circulation to the motor by blocking

the fan located in the bottom of the unit. 9. The circuit board that controls the alarm functions is divided into two sections divided by a line of

holes in the board. The section with the battery controls the alarm functions. The other section holds the transformer, which converts AC to DC power and charges the ni-cad battery.

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MOTION ALARM FUNCTION The built-in motion alarm monitors the motion of the storage frame and sounds an alarm when the frame does not move for a preset period of time. (The default set time is approximately 2 1/2 minutes). A magnetic actuator is mounted underneath the storage frame and a sensor is mounted on the stationary base. As the magnet moves in and out of the range of the sensor a timing circuit is set to zero and begins timing again. When the magnet fails to change position for the preset period of time the alarm will sound. (See Adjusting the Time Interval Mechanism.) The alarm controls located on the front right and right side of the base unit function as follows: On-Off Switch - Turns the power on and off for the alarm only. The only time this switch should be in the "off" position is when the rotator is not being used. It should never be used when accessing platelet bags. Audible Alarm - The continuous tone sounds when the circuit is in alarm mode. Visual Alarm - The light is illuminated when the circuit is in alarm mode. Power Source - The alarm circuit is powered by one 9-volt rechargeable ni-cad battery located on the circuit board inside the unit. It is continuously charged on the board as long as the power cord is plugged in to a live outlet. The main power switch does not have to be "On" for the battery to charge. Test Alarm Regularly - The alarm should be tested weekly. Simply stop the agitator and wait the designated time for the alarm to sound. Adjusting the Time Interval Mechanism:

1. Unplug the unit from its power source.

2. Remove the hole plug from the right side of the base.

3. Locate the electronic trimmer dial (P1) on the circuit board. (Refer to the wiring schematic portion of this manual for a diagram of the circuit board.)

4. The round dial on the trimmer pot is used when adjusting the time interval mechanism

(from zero to 5 minutes). With the alarm switch "on" turn the dial in one direction until it stops. If the alarm sounds immediately this is the zero setting. If the alarm does not sound immediately this is the 5 minute (approximately) setting. Adjust the dial between these two extremes for the setting you desire.

5. To verify the length of the time interval, stop the agitator and time the length of the delay

before the alarm sounds. If adjustments need to be made to the amount of time delay, simply turn the trimmer dial as needed and monitor the length of the time delay.

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Central Alarm Connections: 1. Unplug the unit from its power source. 2. Refer to the section on "Accessing the Internal Components" and remove the storage frame from

the base. 3. Run the leads from the central alarm system through the grommetted hole on the right side of the

base to the terminal block (T1), ports 1 and 2, on the circuit board. It does not make any difference as to which leads from the central alarm system connect to the two ports. (Do not connect to port 3 on the circuit board. It is not used for the central alarm connection.)

4. The relay supplied for the circuit functions in the normally opened mode and connects the alarm

circuit when the alarm mode is activated. If the alarm system that is to be attached requires a normally closed relay then you will need to replace relay Q2 with a Magnacraft #W171DIP-12 (contact Helmer if needed).

5. If the central alarm requires a voltage input a battery may be connected in series on one incoming

lead. With this in place the battery voltage is available when the relay closes in alarm mode. Extension Alarm Connection to Model A40: 1. Unplug the unit from its power source. 2. Refer to the section on "Accessing the Internal Components" and remove the storage frame from

the base. 3. Run the cable from the extension alarm through the grommetted hole on the right side of the base.

After the cable is through the hole knot the cable so that it cannot pull back through the hole. 4. Connect the black wire lead from the extension alarm to the terminal block (T1), port 3, on the

circuit board. Then connect the red wire lead from the extension alarm to port 2. (Do not connect to port 1, it is not used for the extension alarm connection).

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SERVICING Accessing the Internal Components: 1. Unplug the power cord and remove the drawers from the storage frame as described previously. 2. Locate the set of screws in the slots at the rear of the platform. 3. Loosen the screws 1/2 turn and pull them to the forward position of the slot. 4. Retighten them in this position. 4a. (230 volt units only) - Locate and remove the single screw in the back right corner of the

platform. This is the ground connection. (115 volt units do not need to have storage frame grounded.)

5. Rotate the storage frame forward on the base until the rear of the frame is 1 1/2 inches (4 cm)

above the base. 6. Slide the frame toward the back of the base until the drive track lip is clear of the lip on the front

of the base. 7. Lift the frame up and off of the base. Reassembly: 1. Push the four roller wheels to their extreme rear positions. 2. Set the frame assembly back on top of the base. 3. Tip the frame assembly forward and maneuver the frame so that the drive track lip moves back

into position under the lip on the front of the base. 4. Position the front wheels so they set between the two walls of the drive track. 4a. (230 volt units only) - Before setting the rear in place, reconnect the ground strap to the underside

of the frame with the screw previously removed. 5. Set the frame into position. (The rear wheels may need to be repositioned at this time for proper

placement in the track. Also, be sure that the drive bearing on the motor engages between the two bearing blocks on the frame.)

6. Reposition the safety bracket screw to the rear of their slots and tighten. 7. Replug the power cord and continue use.

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Troubleshooting Notes: If power is disrupted to the unit check electrical components in this order: 1. Power cord connection to rear of unit. 2. Fuse in power entry module. (An extra fuse is located in the entry module. See fuse rating on specification label if replacement

is needed.) 3. Main power switch. 4. Internal line connections. 5. Fan or motor. Annual Maintenance: Conduct a visual inspection of the internal components, checking for general cleanliness and condition of the motor bearing assembly and roller wheels. Lubricate or replace as necessary. Suggested Lubrication: 10 w Oil Cleaning: All exposed parts may be cleaned with non-abrasive soap and water or disinfectant solution. The drawers may be removed for cleaning, as described above. Limited Warranty: The flatbed agitators are warranteed for one year for materials and labor at our factory. Liability in all events is limited to the purchase price.

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MODELS PFS42 AND PFS84 PARTS LIST To order parts for your flatbed agitator indicate quantity, part number and description. Please state the model and serial number also. STOCK NUMBER DESCRIPTION

400257 Motor 115V 60 Hz (Does not include gearbox) 400258 Motor 220/240v 50 Hz (Does not include gearbox) 220053 Gearbox 120047 Capacitor, 250 VAC 4uF (115V models) 120301 Capacitor, 430 VAC .9 uF (230V models) 120150 Fan, shaded pole 3.1" 115V 120151 Fan, shaded pole 3.1" 230V 120155 Power cord 120V 120156 Power cord 240V, Continental Europe plug 120157 Power Switch 125V 120158 Power Switch 240V 120202 Alarm Rocker Switch 120214 Alarm Light 120160 Audible Alarm 400238 Circuit Board 120124 Motion Sensor 120125 Motion Actuator 220050 Ball Bearing (For motor crank) 220052 Rubber Motor Mount 220060 Wheel Bushing 1-320282 Wheel 400089 Drawer Assembly PFS42 400310 Drawer Assembly PFS84 400174 Drawer Stop Assembly (Spring-loaded stop)

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MODELS PFS42 and PFS84VERSION AOperation Service - Maintenance