Dwyer Instruments LOVE Iso Verter II SC478 User manual

February, 2000 Page1 949-0533
Iso Verter®II
Model SC478 and SCL478
INSTALLATION INSTRUCTIONS
a Division of Dwyer Instruments, Incorporated
PO Box 338 Michigan City, IN 46361-0338
[phone] [phone] FAX [phone]
www.love-controls.com
❍❍
❍
LOVE CONTROLS
®
LOVE
1 Delta Park Blvd, #12 Brampton, ON L6T 5G1
Tel [phone] or 1-800-794-5883
Fax [phone] or 1-800-830-7122
[e-mail] www.mod-tronic.com

949-0533 Page2 February, 2000
© COPYRIGHT 2000, LOVE CONTROLS, A DIVISION OF DWYER INSTRUMENTS, INC.,
ALLRIGHTSRESERVED
PRINTED IN U.S.A.
Contents
DESCRIPTION........................................................................................ 3
OUTPUT PROGRAMMING -- HARDWARE............................................ 3
MODE SELECTION SWITCH BANK (SW-3)..........................................3
RANGE SELECTION SWITCH BANK (SW-4) ........................................ 4
MOUNTING............................................................................................. 4
WIRING................................................................................................... 4
CALIBRATION ......................................................................................... 5
INPUT CALIBRATION ............................................................................. 5
OUTPUT CALIBRATION ......................................................................... 6
SPECIFICATIONS ................................................................................... 7
DIMENSIONS ......................................................................................... 8

February, 2000 Page3 949-0533
Description
The SC/SCL478 accepts a pulse frequency input. The input sen-
sitivity can be adjusted from 50mV to 5V (150V max).
The SC/SCL478 is a microprocessor-based unit. Calibration of
the input and output ranges is done with a simple push-button and three
LED display. The push-button is recessed to avoid inadvertently bumping
it by mistake. Calibration values are stored in a nonvolatile memory.
The input may be configured for a minimum span of 0.2 Hz for
frequencies between 1 to 1000 Hz. For frequencies between 1000 Hz to
10,000 Hz, the minimum span is 2 Hz. This allows the input to be pro-
grammed for almost any desired span, i.e. 10 to 15 Hz, 3456 to 5678 Hz,
or 9998 to 10,000 Hz.
Output Selection
MODE SELECTION SWITCH BANK (SW-3)
1. ForVOLTAGE OUTPUT turn switches one and two ON and switch
three OFF.
2. For CURRENT OUTPUT turn switches one and two OFF and
switch three ON.
3. For UNIPOLAR OUTPUT turn switch four ON and switch five
OFF.
4. For BIPOLAR OUTPUT turn switch four OFF and switch five ON.
5. For ZERO BASED OUTPUT (eg.0TO 20 mA) turn switch six ON
and switch seven OFF.
6. For ZERO SUPPRESSION (eg.4TO 20 mA) turn switch six OFF
and switch seven ON. If BIPOLAR is selected, do not use the
Figure1. OutputSelectionSwitches

949-0533 Page4 February, 2000
Wiring
The wiring terminals for the SC478 and SCL478 are
compression type. To open the wiring terminal, turn
the screw for that terminal counterclockwise. Slide
the wire into the terminal space. While holding the
wire in place, turn the screw clockwise to tighten.
Do not overtighten. The wire should be held snugly
in place.
Power for SC478 is 85 to 265 Vdc/Vac 50 to 400 Hz.
Power for SCL478 is 12 to 24 Vdc/Vac 50 to 400 Hz.
Wire the input, output, and power as shown on the wir-
ing label. Do not run Class 2 signal wires adjacent to
or in the same conduit as power wires.
Mounting
Mount the unit in a panel that will not be subject to excessive tempera-
ture, shock, or vibration. All models are designed for mounting on an
industry standard 35 mm DIN rail. An optional surface mounting kit is
available from the factory (P/N 35DINADPTR).
To install hold the SC478 so that the front is higher than
the rear. Place the upper slot on the rear of the SC478 on
the top edge of the DIN rail. Slowly rotate the front down
until the bottom spring clip snaps over the bottom edge of
the DIN rail.
To remove from the DIN rail, place a small slotted screw-
driver in the slot in the spring clip under the housing. Pry
the slot downward to release the SC478 from the bottom
of the rail.
ZERO SUPPRESSION switch. Use the ZERO adjustment to
suppress the output.
7. Switch eight is always OFF. (It is not connected to any circuitry.
If switch eight is turned ON there is no effect on the operation of
the device.)
RANGE SELECTION SWITCH BANK (SW-4)
Turn ON the switch for the scale desired. All other switches should
be OFF. If BIPOLAR OUTPUT is selected, the scale will be from
MINUS-SELECTION to PLUS-SELECTION (eg. -10 TO +10 VDC)
Slot
Figure2.
RemovalSlot
Figure3.
Wiring
POWER

February, 2000 Page5 949-0533
CALIBRATION
WARNING: Do not attempt to operate this device
with the cover removed. Potentially lethal voltage
is present on some of the internal components. Do
notopen the unit. Thereareno internal adjustments
or user serviceable parts in the unit.
INPUT SENSITIVITY
Input a frequency between 10 Hz and 10,000 Hz at the desired input
amplitude.
Adjust the INPUT SENS. adjustment pot until the GREEN LED stops
blinking and turns on. For best results, turn the INPUT SENS. adjustment
pot one complete revolution beyond the point where the GREEN LED
turns on.
INPUT CALIBRATION
1. Input the MAXIMUM desired frequency.
2. Press the CAL switch - the red IN LED will light.
Note: if the LEDs were flashing due to a previous error condition, they will
stop and allow calibration to continue.
3. Input the MINIMUM desired frequency
4. Press the CAL switch - the yellow OUT led will light.
If this is the first time the unit is calibrated, or it is desired to recalibrate
the output, do not release the CAL switch until the yellow OUT led flashes,
and proceed to OUTPUT CALIBRATION.
If the output has been previously calibrated and only the input is being
calibrated, the output calibration may be bypassed by releasing the CAL
switch; waiting about one second and pressing the CAL switch again. The
red IN and yellow OUT LEDs will turn off and the input calibration values
will be stored in nonvolatile memory.
RED LED -- IN
YELLOW LED -- OUT
GREEN LED -- INPUT SENS.
CAL SWITCH
INPUT SENS. Adjustment Pot
Figure4. PositionofLEDs,Switch, and Adjustment Pot

949-0533 Page6 February, 2000
OUTPUT CALIBRATION
1. Adjust the input frequency at least 15% below the maximum desired
input value, then adjust the input frequency for the desired MAXIMUM
output value.
2.Press the CAL switch. The red IN LED will turn off, and the yellow OUT
LED will stop flashing and stay on.
3. Adjust the input frequency at least 15% above the minimum desired
input value, and then adjust the input frequency for the desired MINIMUM
output value.
4. Press the CAL switch. The yellow OUT LED will turn off and the cali-
bration values will be stored in nonvolatile memory.
If the red and yellow LEDs flash after calibration, an error condition exits,
i.e. the input or output span was set too small, or the minimum/maximum
values were reversed.
If it is desired to retain the previous calibration values and exit calibration,
simply remove power to the unit before pressing the CAL switch at the
minimum input or output step.

February, 2000 Page7 949-0533
Specifications
Power Supply: SC478: 85 to 265 Vac/ Vac 50 to 400 Hz.
SCL478: 12 to 24 Vdc/Vac 50 to 400 Hz. ±20%
Isolation: 1500 VAC
Ambient Temperature Range:
Operating: 0° to 55° C (32° to 131° F)
Storage: -40° to +80°C (-40° to +176°F)
Humidity Conditions: 0 to 90% up to 40 °C non-condensing, 10 to 50%
at 55 °C non-condensing.
Linearity: 0.1%
Drift: ±0.02% per °C typical, ±0.05% maximum.
Maximum current output load: 600 ohms.
Maximum voltage output load: 20mA (500 ohms).
InputType: Frequency.
Full scale range: 1 to 10,000 Hz.
Input impedence: >50 Kohms.
Input Amplitude: 50mV to 150V RMS, overload protected to 180V RMS
Zero adjustment: 0-9998 Hz.
Span adjustment: 2-10,000 Hz.
Minimum span: Input<1,000 Hz = 0.2 Hz. Input >1,000 kHz = 2 Hz.
Input Resolution:
Maximum calibrated input frequency <1,000 Hz = 0.01 Hz
Maximum calibrated input frequency >1,000 Hz = 0.1 Hz
Output Resolution: >7000 steps (approximately 13 bits).

949-0533 Page8 February, 2000
Dimensions
a Division of Dwyer Instruments, Incorporated
PO Box 338 Michigan City, IN 46361-0338
[phone] [phone] FAX [phone]
www.love-controls.com
❍❍
❍
LOVE CONTROLS
®
LOVE
1 Delta Park Blvd, #12 Brampton, ON L6T 5G1
Tel [phone] or 1-800-794-5883
Fax [phone] or 1-800-830-7122
[e-mail] www.mod-tronic.com