aND hUMIDIty SeNSOR

In document PS501 User's Manual. MANPS501 Revision 1 (Page 37-40)

The temperature and humidity sensor requires main- tenance as well as a more scrupulous cleaning once every three months.

Weekly PROCeDURe Reservoir

Clean the water reservoir with detergent and a bottle brush to minimize the build-up of mineral deposits. If necessary, add water to the reservoir. Filling the reser- voir with water may also be required between weekly cleaning. (Jamesway recommends that only distilled water be used.)

Wick

Replace the wick every seven (7) days or more frequently, depending upon the mineral content of the water. Mineral deposits can build up in the wick, resulting in false readings.

to Install a Wick

Hold the top of the wicking with one hand. Gently slide over the extended end of the probe. Seat the wicking firmly around the probe. Place the free end of the wicking into the reservoir, Make sure it does not twist or bend. Any twists or bends will interrupt the flow of water through the wicking. The wicking should be 12 inches (30 cm) in length.

thRee MONth PROCeDURe Probes

Hard water causes the probes to develop lime and cal- cium deposits. To clean the probes remove the probe baffle. Wash the probes in white vinegar or other mild acid solvent; rinse thoroughly with water. Failure to do so may result in probe deterioration. If water quality is poor, probes may require more frequent cleaning. Make sure that the temperature probe baffle is not out of position or damaged. The baffle should be on a horizontal plane to protect the probe from coming into direct contact with the spray or stray water particles.

CalIBRatION,

GeNeRal CONSIDeRatIONS environment

It is preferred that measurements of both dry and wet bulb temperature calibrations be accomplished during a period when the most stable environment exists. The most stable environment in a Multi-Stage incubator (Space Saver, Conventional Tunnel or Side Door) is 12 hours after setting. A chicken incubator should have six (6) fully loaded racks on each side. A turkey or duck incubator should have four (4) fully loaded racks on each side. The most stable environment in a Hatchcommander is 24 hours after complete setting. In a hatcher, both 2-Door and PX, it is 12 to 24 hours after transferring.

Always calibrate with the fans running and the tem- perature near the normal operating temperature.

equipment

To ensure that this procedure is carried out correctly, you should have:

1. A digital test thermometer of known accuracy with display resolution of 0.1°F (0.05°C), and

2. A probe-holding device as described below. The holding device consists of two short sections of plastic tube taped side-by-side. The larger tube slides over the PS501 probe, while the instrument probe is inserted in the smaller one. Thus, the device effectively holds both sensing probes as close together as possible, without allowing them to touch. You may allow the shaft of the electrotherm to bend in order to obtain this desired closeness.

It is essential that the test thermometer be checked for accuracy regularly.

Procedure

With the two probes lined up and the hand-held ther- mometer read-out installed on the outside of the machine, the check can proceed.

Turn down the humidity setpoint to 80°F. Wait for about 10 minutes to allow both probes to settle and read accurately.

Calibrating the sensor - You may allow the shaft of the electrotherm (red) to bend in order to obtain this desired closeness to the probe.

Two short sections of plastic tubing taped side by side.

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TemperaTure CalibraTion Machine Sensor

Reading +/- Offset = Corrected actual reading The temperature is calibrated in dry bulb. If the dis- play panel and the test thermometer readings differ by greater than 0.1°F (0.05°C), recalibration is required.

Calibrating the Temperature readout

1. Press the button, the temperature setpoint area will show Fn.

2. Press 1 button, the temperature setpoint area will

show Fn1, the humidity setpoint area will show

the current offset from factory calibration, and the right hand digit in humidity actual area will start to blink.

3. Enter the reading from the electrotherm or calibra- tion thermometer, for example to enter 99.0 press

9 9 0.

4. Press the button to complete the calibration, or press any other command button to cancel calibration.

5. Wait 10 minutes, recheck and readjust, if necessary. When both readings are similar, the calibration procedure is complete.

If the controller displays Err message, then the new

calibration exceeds the maximum allowed offset of 9.9°F (5.5°C) and the machine restores the previous calibration. This usually happens because of incorrect calibration procedure or a faulty temperature probe.

HumidiTy CalibraTion

Machine Sensor

Reading +/- Offset = Corrected actual reading The humidity can be calibrated either as a dry bulb or as a wet bulb.

For wet bulb, insert a separate wick on the electrotherm probe. Allow 10 minutes for the probe to stabilize and read accurately. If the display panel and the test ther- mometer readings differ by greater than 0.1°F (0.05°C), recalibration is required.

Calibrating the Humidity readout

1. Press the button, the temperature setpoint area will show Fn.

2. Press 2 button, the temperature setpoint area will

show Fn2, the humidity setpoint area will show

the current offset from factory calibration, and the right hand digit in humidity actual area will start to blink.

3. Enter the reading from Electrotherm or calibration thermometer, for example to enter 86.2 press 8 6 2.

4. Press the button to complete the calibration, or press any other command button to cancel the calibration.

If the controller displays Err message, then the new

calibration exceeds the maximum allowed offset of 9.9°F (5.5°C) and machine restores previous calibration. This usually happens because of incorrect calibration procedure or faulty humidity probe.

note: If temperature and humidity measure-

ments show excessive differences, that is greater than 0.5°F (0.27°C), a further check, the following day may, be necessary. This allows the eggs more time to adapt to the new set points and the machine to stabilize to normal operational sequences.

alarm TesT

Press the button to test whether the audible alarm system and display are working. As long as the button is pressed down, the audible alarm will ring and all digits and status lights will turn on. The audible alarm will not sound if the Alarm Bypass switch is on.

note: If the audible alarm bell does not ring

for any function where the alarm is enabled, check the battery, connections or alarm circuit. (Refer to page 12 for Alarm Set-up.)

Fan moTor oFF swiTCH TesT

Turn off the fans and unplug one motor. Then, turn the fans back on. The Fan Failure LED should light, the audible alarm should ring (if enabled) and the Common Alarm lamp should flash. Repeat the process for each motor.

Remember to switch off the fans each time before unplugging each motor.

Turn Failure TesT

(InCubATOR)

Disconnect the turn cables at any location. The Turn Failure LED should light and the Common Alarm lamp should flash after five to seven (5–7) minutes. If selected, the audible alarm also should ring.

power oFF TesT

Turn off the power to the incubator. All of the LEDs on the display panel should go out, causing the audible alarm to ring.

In document PS501 User's Manual. MANPS501 Revision 1 (Page 37-40)