Seametrics AD30 - Manual

PUB -19560-1000
Page 1 of 2
Specifications General Information
AD30 Analog to Pulse
Converter Instructions
This simple, compact module converts a 4-20 mA ana-
log signal into a pulse frequency, typically to control a
pulse-type chemical metering pump. The most com-
mon applications involve injecting chemical proportional
to some measured variable, such as pH, ORP, or flow.
Designed for simplicity of use, the unit is encapsulated
and pre-wired, with input and output connectors as speci-
fied. Frequency at 20 mA is user settable, with a choice
of 60, 80, 100, or 150 pulses per minute. So that it can
work with a wide variety of metering pumps, the AD30 is
loop-powered and requires no other power supply. Low
impedence makes it possible to connect several units
to a single current loop.
The unit can be mounted with screws through a lug on
each side, or with the supplied double-backed tape.
Standard input cable length is 12 feet, and standard
output length is 24 inches. An LMI connector is stan-
dard; pigtails are available for other pumps.
Power 14 - 30 VDC
Minimum Current 3.9 mA
Accuracy
Linearity
±
1% FS
Zero Drift 0.06% per
°
C of full scale
Span drift 0.04% per
°
C of output frequency
Output Solid state relay
Max Output Sink 120 mA at 110 VAC/
VDC
Operating Temperature 32
°
F to 140
°
F
Storage Temperature -40
°
F to 175
°
F
Features
RED +
BLACK -
RED +
BLACK -
INPUT
4-20 mA
OUTPUT
PULSE
PPM MAXIMUM
Analog to Pulse Converter
Screw or
double-backed
tape mounting
Encapsulated
for environmental
protection
Pump connector
as specified for
convenient
hookup
Choice of maximum
pulse frequency:
60
80
100
150
4-20 mA
input
DIS
CON
TIN
UED