Specifications

NEW!
TRANSDUCERS
1440
NEW!
TRANSDUCERS
23
WHEN YOU NEED IT RIGHT, RIGHT NOW, CALL KELE.
kele.com888-397-5353 USA
March 2014
Tools required: a multimeter and a signal generator.
The PWA-1A, PWA-2A, PWA-1T, and PWA-2T outputs are factory set at 4-20 mA and 1-5V. To change the calibration, see the
instructions below. After calibration, alternate between minimum and maximum input pulses and fine tune the mA and voltage
potentiometers for desired mA or volt outputs (typically just one more pass is necessary).
FOR APPLICATIONS REQUIRING CURRENT (mA) ONLY OR CURRENT AND VOLTAGE OUTPUT
1. Using a signal generator:
PWA-1A, -2A: Apply a minimum input pulse signal.
PWA-1T, -2T: Apply a contact closure equal to the selected time base, such as 25.5 sec, to the SIG - terminal.
2. With a multimeter connected to mA output, set MA ZERO potentiometer at desired minimum mA output.
3. Using a signal generator:
PWA-1A, -2A: Apply a maximum input pulse signal.
PWA-1T, -2T: Apply a contact closure equal to the selected time base to the SIG + terminal.
4. Set MA SPAN potentiometer at desired maximum mA output.
5. Calibration of mA output is complete. If voltage output is also required, proceed to step 6.
6. With multimeter connected to voltage output, set maximum voltage output desired with the VOLT ADJ potentiometer.
7. Determine the ratio of maximum mA output to minimum mA output (i.e., 20 mA maximum output: 4 mA minimum output = 5:1).
8. The minimum voltage is automatically set according to the ratio of maximum-to-minimum mA output. Using the example from
step 7 above for the mA range and using a 10V maximum voltage output, the ratio remains the same (i.e., 20 mA maximum: 4
mA minimum = 5:1 = 10V:2V). The minimum voltage output would be automatically set at 2V. Note: To change voltage output,
repeat Steps 3, 6, 7, and 8.
FOR APPLICATIONS REQUIRING VOLTAGE OUTPUT ONLY
1. Determine the minimum and maximum voltage output required (0-18V total range).
2. Using the following formula, determine the minimum mA output: minimum mA output = 20 mA x desired minimum volts desired
maximum volts
3. Using a signal generator:
PWA-1A, -2A: Apply a minimum input pulse signal.
PWA-1T, -2T: Apply a contact closure equal to the selected time base, such as 25.5 sec, to the SIG - terminal.
4. With a multimeter connected to mA output, set MA ZERO potentiometer at calculated minimum mA output (from formula in step
2).
5. Using a signal generator:
PWA-1A, -2A: Apply a maximum input pulse signal.
PWA-1T, -2T: Apply a contact closure equal to the selected time base to the SIG + terminal.
6. Set MA SPAN potentiometer at 20 mA.
7. With multimeter connected to voltage output, set the VOLT ADJ potentiometer to desired maximum voltage. The minimum
voltage is automatically set according to the ratio of maximum-to-minimum mA output.
ORDERING INFORMATION
MODEL
PWA-1A
PWA-2A
PWA-1T
PWA-2T
DESCRIPTION
OPTIONS
PWA-1A
47
Example: PWA-1A-47 Enclosed pulse-to-analog transducer with DIN rail mounting
Pulse-to-analog enclosed transducer
Pulse-to-analog snap-track mount transducer
Tr i-state-to-analog enclosed transducer
Tr i-state-to-analog snap-track mount transducer
47
C
DIN rail mounting adapter (For PWA-1A and PWA-1T only)
Factory calibrate for special output range (specify range when ordering)
CALIBRATION
PULSE / TRI-STATE-TO-ANALOG TRANSDUCERS
PWA SERIES