KEP KEPtrol R-T Data sheet
KEPTROL R/T
Features
• Pulse or Analog Input Ordering Options
• Display T otal, Rate or Grand T otal
•Two Alarm Outputs, User Selectable for T otal,
Rate or Grand T otal
• Pulse Input to 20 kHz Count Frequency
• K-Factor Programmable to 8 Places
• Password Protection
•Two Way RS232/422/ Communications Option
• NEMA 4X/IP 65 Front Panel
• Scalable Analog Output of Rate or T otal
Flow Instruments
(optional)
• 16 Point Linearization Option
RATEMETERS/TOTALIZERS
Description:
Featuring 8 digits of bright, .55", alphanumeric display, the
pulse input version of the KEPtrol R/T can accept up to 20,000
pulses per second. The analog input version accepts inputs,
such as 4 to 20mA or 1 to 5V. The standard KEPtrol R/T has two
separate, 8 digit, floating decimal, “K” factors to convert the
inputs to meaningful total and rate data. An optional 16 point Kfactor can linearize flow from meter outputs. The user, with the
push of a button, can toggle back and forth to view the total, the
rate of flow and the grand total count. Two control outputs can be
assigned independently by the user to activate at preset limit of
total, rate or grand total for .1 to 9.9 seconds or until reset.
A scaled pulse output is also provided by an open collector
driver. Since the output frequency is user selectable at 10, 200,
2K or 20K Hz, the unit can transmit the total data to remote
electromechanical or electronic totalizers as well as computers,
programmable controllers or other monitor equipment.
An optional analog output allows the user to select low and
high settings to control strip chart recorders or other peripherals.
Up to 15 units can be connected to optional RS232 or RS422
communications port to set control points or access data.
Specifications:
Display: 8 Digit, .55" High, 15 Segment, Red Orange, LED.
Input Power (Internally Fused)
A: 110 VAC ±15% or 12 to 27 VDC
B: 220 VAC ±15% or 12 to 27 VDC
Current: Maximum 250mA DC or 3.2VA (3.2W) at rated AC
voltage.
Output Power: (On AC powered units only)
+12 VDC at 100mA. Separate Isolated 12 VDC at 100mA to
allow +12 VDC or +24 VDC regulated ±5% worst case.
DC Outputs are supplied with resettable fuses.
Memory: EEPROM stores all program and total data for minimum of 10 years if power is lost.
TOTALIZER / RATEMETER
Pulse Inputs:
3A: Standard, High impedance pulse input. Open or 0 to 1 VDC
(low), 3 to 30 VDC (high), 10K Ohm impedance, 20 kHz max.
input speed (min. on/off 25 µsec.).
3B: Same as 3A but has 4.7K Ohm input pull up resistors to +5
VDC on input for pulsing with contact to ground or NPN open
collector transistor.
Analog Inputs:
The current loop or voltage input is converted to a highly linear 0
to 10 kHz frequency . This frequency can then be scaled by the 8
digit K-Factors to total or display rate in separate engineering
units.
Accuracy over full temperature range:
Zero error: +0.175% full scale max.
Overall error: +0.5% full scale max.
5A/7A: 4-20mA, 250 Ohm impedance
5B/7B: 0-20mA, 250 Ohm impedance
5C/7C: 1-5 VDC, 15K Ohm impedance
5D/7D: 0-5 VDC, 15K Ohm impedance
5E/7E: 0-10 VDC, 15K Ohm impedance
6A: 4-20 mA, Square Law, 250 Ohm impedance
Reset:
Front push button: “Clear” resets displayed number and control
output. Remote: 3 to 30 VDC positive edge resets the totalizer
and control output. Impedance: 10K to ground
Minimum pulse: 5 msec.
Temperature:
Operating: +32°F (0°C) to +130°F (+54°C).
Storage: -40°F (-40°C) to +200°F (+93°C).
ET: Extended Temperature -40° to 158°F (-40° to 70° C)
ET not available with analog inputs or outputs
Humidity: 0-90% Noncondensing
Listing: CE Compliant
Totalizer: Each of the total and grand total counters have 8
digits. In the set-up mode choose “R0” (reset to zero) for adding
operation or “SP” (set to preset) for subtracting operation. While
viewing the total, the display can be made to flash the grand total
by pressing “ENT”. Activating “CLR” while the grand total is
flashing, resets the grand total counter.
Page 56 • Flow Instruments • F-15 Kessler-Ellis Products • 800-631-2165
Ratemeter: Accurate to 51/2 digits (+1 display digit). The rate
meter can be programmed to accept almost any number of
pulses per unit of measurement for pulse rate as low as one
pulse every 24 seconds, and autorange up to 6 digits of signifi-
cant information. The rate meter with a “K” factor of 1 displays
the rate of pulses per second. Simply dial in the proper “K” factor
to display in minutes, hours or other units of measurement.
Press the “C” button while the unit is displaying the total to
display the rate as indicated by “R” displayed on the left side of
the display.
Password Lockout: Two stage lockout is available for allowing
change of presets only or total lockout of front panel parameter
changes. Unauthorized front panel changes can be prevented
by entering a user selected four digit password code.
Factored Output: The KEPtrol R/T gives one pulse out for each
factored total count. Open collector sinks 30 VDC maximum to 1
volt maximum at 100mA maximum. Output speed is user select-
able (see table below). An internal buffer holds up to 10,000
pulses for output at the selected frequency before “DATALOST”
flashes, indicating output pulses were lost. If factored rate ex-
ceeds 7 digits “RFF…” flashes. This alarm indicates that the
maximum displayed rate has been exceeded.
Speed(HZ) 10 200 2000 20000
Min. on/off
(msec) 47.5 2.0 0.2 0.013
Control Outputs: (Each of two outputs)
1. NPN Transistor Version: (Optional)
Open collector sinks max. 250mA from 30 VDC when active.
2. SPDT Relay Version:
10A 120/240 VAC or 28 VDC (Standard).
Analog Output: Digital input or analog input (except Square
Law) versions can be ordered with an analog output of the rate
or total reading. User keys in the low and high settings at set-up.
Current Outputs:
A sinking driver generates a corresponding linear current through
the external devices, updating with each update of the rate
display. Accuracy is ±.5% worst case. Compliance voltage must
be 3 to 24 VDC, non inductive. (The KEPtrol R/T can provide the
DC source as long as the drop across all devices being driven
does not exceed 21 V).
Voltage Outputs:
When the voltage out option is ordered, a controlled voltage
output is located at terminal 3 and referenced to pin 12 (ground).
Accuracy is .1% @ 20°C ( max. drift .01%/C° ).
Preset Alarms: Two control alarms are provided on the KEPtrol
R/T. The preset numbers can be made to flash without interrupt-
ing the control function by pressing “A” (Preset A) or “B” (Preset
B). Press “ENT” to return to rate or total display. Change the
preset by clearing the flashing preset number and keying in a
new setpoint number before pressing the “ENT” button. (Count
pulses may be lost if the preset is changed while pulses are
coming in.) In the “Relay Set-Up” the user selects either or both
preset outputs to be activated by the total, grand total or rate. If
selected for total or grand total the outputs can be set to activate
at the preset total for 0.1 to 9.9 seconds or latch (0.0 setting)
until reset. If selected for rate control, the rate will be compared
with the preset at each display update and the output activated if
the rate is equal to or greater than the preset. The output drops
out again only if the rate drops below the preset. If the rate goes
out of scale the display will show all “F” and the output will
remain in the state prior to going out of scale.
K-Factor: In the standard unit a fixed K-Factor is used to convert
the input pulses or frequency generated internally by the analog
input to engineering units. The 8 digit K-Factor dividers, with
decimal keyed into any position, allow easy direct entry of any KFactor greater than 0.0001 to 99999999. Separate K-Factors
may be entered for the total and rate section. Thus, you may
totalize in gallons and display rate in liters per hour. The maximum factored count speed is 20,000 Hz. The maximum factored
rate is 7 digits.
16 POINT LINEARIZATION variable K-factor option makes flow
systems more accurate and often extends their usable range by
allowing users to dial in different K-factors for different flow rates.
It works with either pulse input or standard analog current loop or
voltage input. It is recommended for flow meters whose Kfactors change with different rates of flow . From 3 to 16 points of
frequency (0 to 10,000 Hz) and K-factors (.0001 to 999,999) are
dialed in at set up. The unit uses 8 digit floating math to
interpolate between settings. Rate per second, per minute or
per hour programmability eliminates the need to calculate separate K-factors for total and rate.
Outcard: RS232 or RS422 serial two way communication options are available. Several units can be linked together and
addressed separately to transmit unit status or accept new set
points in the standard ASCII format. Baud rates of 300, 600,1200,
2400, 4800 or 9600 as well as choice of odd, even, space or
mark parity can be selected by keypad control.
Termination:
1•Not Used
2•Scaled Pulse Output O.C.
3•Analog Output (Sink)
4•Input A (Pulse/Analog)
5•Reset Input
6•Not Used
7•Not Used
8•Not Used
9•Not Used
10•Not Used
11•Ground (-DC)
12•Ground (-DC)
13•+12 Volts Out
14• +DC Power In
15•Isolate -12 Volts
16•Isolate +12 Volts
17•AC In
18•AC In
19•Preset B Open Collector
20•Preset A Open Collector
R1•N.O.
R2•N.C.
A
R3•Common
R4•N.O.
R5•N.C.
B
R6•Common
RATEMETERS/TOTALIZERS
Flow Instruments
Kessler-Ellis Products • 800-631-2165 F-15 • Flow Instruments • Page 57
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