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472H Potato Harvester Owner Operator’s Manual
MULTI FUNCTION
DIGITAL
TACHOMETER
0000
1
2
3
5
6
4
HI
ALARM
ALARM
LOW
CAL
ON
OFF
Fig. #58
3.19 OPTIONS (CONT’D)
3.19.4 SHAFT MONITOR (CONT’D)
Only one channel can be displayed on the screen, but each
channel is continually monitored. During normal operation,
only the light above the displayed channel button will be on.
If a HI ALARM or LOW ALARM occurs, the light above the
alarming channel button will begin to flash. An audible alarm
will accompany the flashing light. After about 10 seconds,
the audible alarm stops, but the channel light will continue
flashing.
When the HI ALARM, LOW ALARM, or CAL button is se-
lected, the Power button does not work. To complete any
calibration, press any of the channel buttons.
HI Alarm Button
The HI ALARM button is used to calibrate the maximum
RPM alarm set points for each channel.
To set the HI ALARM, press the HI ALARM button and use
the Plus and Minus buttons to set the desired value. Once
selected, the red indicator light above the HI ALARM button
and the selected channel button will light-up. Set the HI
ALARM value to an RPM just above the normal operating
RPM.
Low Alarm Button
The LOW ALARM button is used to calibrate the minimum
RPM alarm set points for each channel.
To set the LOW ALARM, press the LOW ALARM button
and use the Plus and Minus buttons to set the desired value.
Once selected, the red indicator light above the LOW ALARM
button and the selected channel button will light-up. Set the
LOW ALARM value to an RPM just below the normal oper-
ating RPM.
Note:
The low alarm will stop when channel one (the PTO)
stops.
Cal Button
The CAL button is used to set the number of target passes
in one revolution.
To program the CAL value, press the CAL button and use
the Plus and Minus buttons to set the desired value. The
number represents the number of pickups used to calculate
the shaft speed. For example, if a single key is used the
CAL number would be “1.” If the teeth on a 12 tooth sprocket
is used, the CAL number would be 12. Setting the CAL
number to zero will deactivate the channel. Once selected,
the red indicator light above the CAL button and the se-
lected channel button will light-up.
Power Button
The Power button is used to turn off the Tachometer. Press-
ing any button turns on the Tachometer. The Power button
will not operate when the HI ALARM, LOW ALARM or CAL
buttons are selected. Only the Tachometer turns-off. All the
sensors and the Splitter Box will remain powered.
Splitter Box
The six sensor inputs of the Splitter Box are labeled 1 to 6.
The number above the sensor input identifies the monitor
channel assigned to that sensor input. For example, if a
Shaft sensor was plugged into sensor input number 4, the
RPM detected by that Shaft sensor would be displayed on
Channel 4.
Testing the Installation
It is recommended to check the Tachometer installation
before starting. Turn on the Tachometer. Check that the
Splitter Box and Shaft sensor power lights are on.
To test a Shaft sensor, repeatedly pass a spare magnet
across the end of the Shaft sensor. This will display an RPM
on the corresponding Tachometer channel.
