Adtech ACT 340L Instruction Manual

1.0 INTRODUCTION
These instructions refer to the above model. Supplementary
sheets are attached if the unit has special options or features.
For detailed specifications, see page 4 or refer to the Data
Bulletin. All ADTE CH instruments are factory calibrated and
supplied with a label detailing the calibration. Adjustments
are normally not necessary. A simple check should be
performed to verify calibration before installation to ensure
that it matches the field requirement.
2.0 GENERAL DESCRIPTION
The ADTE CH ACT 340L LOW POWER transmitter converts
an AC input into a standard process DC signal such as1-5
vdc and also electrically isolates the input from the output
and power supply.
This model cosumes very low power, typically 3.5 mAdc and
is specially designed for remote battery or solar panel
powered applications.
This instrument is powered by 7-42 VDC supply. The negative
of the power and the output share a common connection.
This is the reason it is called a three-wire transmitter.
The input can be either AC current or an AC voltage as per
input ranges on page 4. The AC current input signal is
terminated at terminals 1 and 3 and the voltage input signal
is terminated at terminals 1 and 2 as shown in Section 5.0.
The input frequency range is 25 Hz to 1 KHz. For the highest
accuracy calibrate the ACT 340L at the installed operating
frequency.
3.0 INSTALLATION
The instrument is supplied in a non-metallic general purpose
DIN rail mount enclosure as standard. NEMA 4 and 7
enclosures are optionally available. Installation area/location
must agree with the supplied instruments including operating
temperature and ambient conditions. For detailed mounting
and installation information refer to page 4 inside.
Electrical Connections
The wire used to connect the instrument to the control
system 1/0, should be a twisted pair(s) and sized according
to normal practice. Shielded cable is not normally necessary
(if used, the shield must be grounded at the input of the
ADTECH instrument and left floating at the sensor).
Six position compression terminal block are provided for 1/0
and power connection. A housing ground terminal is not
required due to non-metalilic housing.
ACT 340L
Isolated AC Current/Voltage Transmitter
Instruction Manual
Controls
Instrument controls consists of the following:
• A pair of two position jumpers for input range.
• One 16 position rotary switch for coarse span.
• Two front access multiturn potentiometers for fine Zero
and Span.
• A pair of two position jumpers for type of response.
• A jumper for selection of zero or live based output.
4.0 MAINTENANCE
These instruments are electronic and require no maintenance
except periodic cleaning and calibration verification. If the
unit appears to be mis-operating it should be checked as
installed per section 6.0 or removed for a bench check per
sections 6.0-7.0. MOST problems are traced to field wiring
and/or associated circuits. If the problem appears to be with
the instrument, proceed to sections 6.0 and 7.0.
5.0 CONNECTIONS
Standard connections are shown below and on the instrument
face plate, Data Bulletin or on attached supplementary
sheets.
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ADTECH
-1-
IIN
COM.
190-A-000081