Adtech ARB 96 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 ADTECH 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 ADTECH ARB 96 is a Non-Isolated Adjustable Ramp
Buffer that accepts a process input signal of 1-5 vdc or 4-20 ma
de and limits/controls the rate of output change. If the input
rate of change exceeds the preset high and/or low rate limits,
the output will ramp at the preset rate only.
An external contact input allows the output to be instantaneously
reset to 0% of range for the duration of the contact command
as standard.
Optionally the ARB 96 may be specified with a TRACK/HOLD
feature. In the TRACK mode the output follows the input as a
standard Rate Limited Transmitter. On command (i.e.) HOLD,
the output signal is held '1rozen" until the HOLD command is
removed; Option 137.
Power Option P 1 Non-Isolated 24 vdc provides negative
output signal and negative DC power common rail connection.
The output is a true current source and provides process
signals such as 4-20 ma, 0-1 ma, 0-10 ma, 1-5 ma and 10-50
ma dc or alternatively, a voltage signal of 5 vdc full scale. Other
current and voltage Inputs/Outputs (1/0) are available as
specified on the Data Bulletin.
3.0 INSTALLATION
The instrument is supplied in a general purpose enclosure as
standard. NEMA 4, 7 or 12 and plug in chassis enclosures are
optionally available. Installation area/location must agree with
the supplied instruments including operating temperature and
ambient conditions.
Mounting
Refer to the appropriate outline drawing for mounting and
clearance dimensions. The instrument is surface mounted
with two #10-32 screws on 8.00 inch centers.
Electrical Connections
The used to connect the instrument to the control system
wire
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 negative of the
ADTECH instrument and left floating at the sensor).
A 12 position barrier terminal block with #6-32 screws and
3/8" spacing is provided for 1/0 and power connection.
A housing ground terminal marked G is also provided.
ARB96
Adjustable Ramp Buffer
Instruction Manual
Controls
Multiturn INPUT ZERO, OUTPUT ZERO, SPAN, UP-RATE
and DOWN-RATE controls are provided to calibrate the
instrument. The multiturn controls are accessible through the
instrument front panel and are clearly marked for ease of use.
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 aretracedto 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 oron attached supplementary sheets.
<D
- )
(
INPUT
+ )
(D
(
24
©
· )
(
OUTPUT
©
( + )
(D
COMMAND�
@ + 24 VDC
®
(· FOR DC )
Ai
®
L( + FOR DC )
rt=P
NOTE: No customer connection to Terminals 3 & 4.
- 1 -
24VDC TWO-WIRE POWER
OPTION "O 15"
-
I
4 20MA
�
voe LOOP
0
+l @
(
0
+ )
(
AUXILIARY TWO-WIRE
TRANSMlillR
INPUT RI
"""
(-)
voe
24 AT 20 MA
CURRENT- LIMITED
SUPPLYTO 2-WIRE
FIELD TRANSMITTER
190-A-000017-A