Liquid Controls SCAMP - Manual (Page 12)

12
FAULT INDICATOR / ELECTROMECHANICAL TOTALIZER (Optional)
Function F (Terminals 9 & 10
or 9 & 6) can be utilized for either of two purposes:
1. To operate a fault indicator such as a LED or relay.
2. To operate an electromechanical or electronic counter as a long-term meter totalizer.
IMPORTANT: PERFORM THIS OPERATION BEFORE PROCEEDING!
When accessing the electromechanical totalizer k-Factor, ensure that the “0/1” jumper is
in the “0” position.
STEP 9: To operate as a fault indicator, set the Function Switch in the “F” position, and
confirm the default setting of “F0” on the scrolling LED display. If some other value is
indicated, set all of the Data Switches to “0”, and press the Data Entry pushbutton to
load “0” into memory. The LED should now show “F0”, and the Terminal 9 output will be
programmed for fault indication (i.e., pulled low into current-sinking state during non-
fault conditions to provide “fail-safe” fault indication). Applications of this feature include
indication of a fault condition or shut down of a pump during a fault.
Function F can also operate as a scaled pulse output (with multi-point errors and
temperature
compensation applied) to drive an electromechanical or electronic counter
as a long-term meter totalizer. The pulse from this output is a single-shot 20 millisecond
ON pulse. The k-Factor for the counter is entered into SCAMP by setting the Function
Switch to the “F” position, setting the k-Factor value on the Data Switches, and then
depressing the Data Entry pushbutton to enter the value into memory. The value of the
k-Factor is a number in the range from 40.00 to 9999. Output terminals 9 & 10 can now
be used to drive an external totalizer. Note that due to the fixed pulse width timing of 20
milliseconds ON, the maximum frequency out of terminal 9 should be scaled such that it
does not exceed 25 pulses per second.
FINAL CHECKOUT FLOW TEST
STEP 10: Begin by moving the “0/1” jumper to the “0” position. Set the Function Switch
in the “0” position for Gross Delivery Mode (non-compensated deliveries), or in position
“1” through “A” for Net Delivery Mode (temperature-compensated deliveries). The actual
switch position reflects the Compensation Table (0-A) that has been selected. Then, run
forward flow through your meter. If the dispenser counter counts backwards during
forward flow, reverse the “A” and “B” wires on either the pulser or the counter. Your unit
is now fully commissioned and ready for operation. Be sure the RTD probe is connected
for temperature compensated systems.
IMPORTANT: Before sealing the SCAMP in its enclosure, move the “LOCK”
jumper to the “LOCK” position to protect the calibration data fields, and ensure
that the “0/1” jumper is in the “0” position.