5-digit display which resets to the preset amount and counts down to zero. When the display reaches zero it will begin counting up to give the operator an indication of exactly how much product was batched. The decimal point can be changed via switch S8.
a. No switches on = 00000 (no decimal point)
b. Switch 8-1 on = 0000.0
c. Switch 8-2 on = 000.00
d. Switch 8-3 on = 00.000
Note: Only one switch should be on at a time.
Is used to compensate for the amount of product over-run due to the time it takes for a valve to close.
Is a 6-digit electromechanical counter capable of operating at a maximum count speed of 600 counts per minute. The standard totalizer runs at 1/10 the count speed of the LED display. This can be adjusted from 1/10 to 1/10000 (see Switch S18 Instructions on next page). Care should be taken to ensure that the totalizer is not run at a speed higher than 600 counts per minute, or it will not function correctly.
Will be illuminated when the main power fails and the EBU power switch is on. It indicates that the system’s memory is being retained on battery power. The battery will hold the memory for approximately one hour. Complete recharge time is 48 hours. The main power to the EBU should not be turned off unless the EBU power switch is off. This is done to prevent the battery from being discharged.
This relay is energized during the batch cycle. DPDT contacts are provided for customer use. These contacts are fused at 5 amps, and the 5-amp rating should not be exceeded or damage to the printed circuit board may occur. The contacts are brought out at TS1. CR1 is released when the LED counter counts down to the floating zero set point.
This relay is supplied with the prewarn option. DPDT contacts are provided for customer use. These contacts are fused at 5 amps, and the 5-amp rating should not be exceeded or damage to the printed circuit board may occur. The contacts are brought out at TS1. It is energized when the LED counter counts down to the prewarn set point and released at zero.
Is a 4-pole dip switch. Switch positions 1 and 2 are used to set the totalizer divider network.
| Switch Num. 1 | Switch Num. 2 | Divide By. |
| Off | Off | 10 |
| On | Off | 100 |
| Off | On | 1000 |
| On | On | 10000 |
The component failure alarm over-flow counter uses the totalizer signals if switch S17 is in the "up" position.
Switch No. 3 will disable the component failure alarm system if in the "on" position.
Switch No. 4, if in the "on" position, will release the CR1 and CR2 control relays during an alarm condition, thus stopping the batch process. To restart, push the emergency "STOP" button and then the "RUN" button.
Five rotary type code switches used to select the batch amount. Switches have black knobs with switches to the right of the decimal point having red knobs. If a field change of the decimal point is required please call factory for replacement knobs. Changing the switch setting once the batch has been started will have no effect on batch size. The preset amount is loaded into the memory when the EBU is reset.
Is used to slow down the system’s flow rate prior to final shut-off. Floating zero and prewarn cannot be supplied together.
Used to convert signals from a magnetic pick-up to a signal useable by the EBU.
Is used to start a batch. Once the EBU has been reset the reset start switch is electronically locked out until the batch is completed. To clear the EBU the power switch will have to be turned off and a new batch started. For the relay to energize upon reset the emergency stop switch must be in the “run” position.
Is illuminated to show that the EBU has reached zero and has begun to count up.
Scales the incoming pulse signals from the flow element to any desired engineering unit (i.e., pounds, 1/10 gallons, liters, etc.). Pulses are first multiplied by either 1, 10, 100 or 1000 and then divided by any number from 1 to 9999. The field adjustable scaler enables most systems to be adjusted to within .1%
This is used to select one of ten valves through which to batch. The outputs are 120 VAC – 5 amps at TS2.
This filter is used to clean up or filter incoming pulses from the flow element. Filter should be set to the maximum clean-up for the application. The filter network limits the pulse input frequency that the EBU will accept. Adjust switch S11 for your specific application.
| Frequency | Switch 11 (S11) | Application |
| 7000 Hz | All Down | High Speed Encoder |
| 3200 Hz | 1 Up, 2,3 Down | Turbine Meters |
| 375 Hz | 2 Up, 1,3 Down | PD Meters & Reed Type Pulsers |
| 5 Hz | Up, 1,2 Down | Air Actuated Diaphragm Pumps |
If S11 is set for too little clean-up, contact bounce from pulser may enter EBU as extra pulses, giving an inaccurate batch. If S11 is set for too much clean-up the bounce filter will lock up when the maximum frequency input is exceeded, giving no-flow registration and an inaccurate batch. For example, if the flow element is a 100 GPM maximum meter with a 100-pulse-per-gallon pulser, to compute maximum frequency input:
100 gpm x 100 ppm |
= 166 Hz, S11 should be set with #2 Up/On, (D,U,D) |
60 Hz |
Note: Only one switch should be on at a time.
Monitors the EBU and the flow element and alarms at these flow conditions: no flow, low flow rate, and over-flow. Can be set to release control relays CR1 and CR2 if an alarm condition exists. (see Switch S18 Instructions, Section 2.19)
The EBU comes standard in a fiberglass enclosure (NEMA 4, 4X). A stainless steel enclosure (NEMA 4, 4X) is also available as an alternate option
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| Fiberglass Enclosure | Stainless Steel Enclosure |
These are used to stop and restart a batch cycle. When the EBU is restarted it will continue counting from where it was stopped. In the stop mode relays CR1 and CR2 will be released.
