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DESCRIPTION
Description:
Featuring 6 digits of bright, 7-segment
LED displays, the Protrol is a rate, ratio
and draw meter which is field program-
mable. The two inputs (A & B) have
separate scaling factors. The unit can
be programmed to display: two sepa-
rate ratemeters (A & B), the net differ-
ence of A & B, and the ratio of A to B (A
÷B) or the draw [(A - B) ÷B]. Two
assignable set points are standard with
a programmable hysteresis (alarm
range).
Specifications:
Display:
6 digit, .55" high, 7 segment, red or-
ange, LED.
Rate Display: The ratemeters (A&B)
update once per second and are ac-
curate to 4.5 digits. The unit will
sample from 2 to 24 seconds and will
compute a weighted average (normali-
zation).
Input Power:
110 ±15% or 12 to 15VDC
220 VAC ±15% or 12 to 15VDC
24 VAC ±15% or 12 to 15VDC.
Current::
maximum 250 mA DC or 6.5 VA at
rated AC voltage.
Output Power:(AC powered units) +
12VDC @ 50mA
unregulated -10 +50%
Temperature:
Operating:
+32°F (0°C) to +130°F (+54°C).
Storage:
-40°F (-40°C) to +200°F (93°C).
Memory:
EEPROM stores data for ten years if
power is lost.
Reset:
Front Panel:
Resets (updates) normalization pro-
cess.
Remote: Resets control output (if it's in
hysteresis and below the preset).
Control Outputs:
2 each N.O. Relay - 10Amp @ 120/
240 VAC or 28 VDC. (N.C. Relay
contacts or NPN sink from 10VDC to
.5V @ 100mA available with solder
jumpers).
Input:
High Impedance (STD):
Open or 0 to 1V (low), 3 to 30V (high)
10K Ohm impedance. 10KHz max.
input speed.
Mag Pickup (Option M):
30mV input (50 V max. P/P) signals
10 KΩimp. 5 kHz max.
NOTE:
The Mag. input has filtering as fol-
lows: 30mV trigger level up to 300Hz
0.25 V trigger level at 5KHz
Set Points: Two, 5-digit control set
points are provided. The outputs have
a programmable hysteresis alarm
range from 0 to 9999
Programming: Set points, decimal
points, Scaling from .0001 to 99999,
input type, normalization factor, hys-
teresis alarm range, and security
panel lock code are all programmable
from the front panel.
Housing: Standard 1/8 DIN, high im-
pact ABS plastic case (NEMA 4 front
panel).
Shipping Weight: 2 lbs.
TYPICAL APPLICATION
This application involves the monitoring and control of a paint mixture. The paint mixture must be a ratio of .2 gallons of
pigment to every gallon of base. The flowmeter in the pigment line has a K factor of 50 PPG (pulses per gallon). The K
factor for the flowmeter in the base line is 70 PPG. The individual rates must be displayed in GPM (gallons per minute).
To yeild a reading in GPM, the K factors have to be divided by 60. K factor A (pigment) = .8333 (50 ÷60); K factor B
(base) = 1.1667 (70 ÷60). By programming a decimal in the third location, Presets A & B can be set at .201 (upper limit)
and .199 (lower limit) respectively. With both outputs assigned to display C (net value of A ÷B), output A will decrease
the amount of pigment being added and output B will increase the amount of pigment being added. This will keep the
ratio within desired limits.
1. COMMON
2. N.O. (N.C. / NPN)
3. COMMON
4. N.O. (N.C. / NPN
5. A INPUT
6. B INPUT
7. 12 V OUTPUT / +DC INPUT
8. -DC (GROUND)
9. RESET INPUT
10. NOT USED
11. AC INPUT
12. AC INPUT
A
B
INCREASE
DECREASE
BASE BLENDER
PUMP
PUMP
METER
PIGMENT
METER
