Series A1 & A2
Installation and Operation
Manual
Bulletin 101-0
Series A1 / A2 – Installation and Operation Manual
The series A1 and A2 are microprocessor based digital pressure gauges for
positive, negative, and differential measurement designed to be a direct
replacement for mechanical gauges. The ½” LCD display gives the gauge
improved readability and precision. These products also feature 5 user
selectable engineering units including in. w.c., mm w.c., cm w.c., kPa, and
Pa. The A2 series adds a “process arch” which gives the gauge a similar
look to mechanical gauges by giving a continuous percent output status.
Example
A2100-03
Description
Model
A
Round Panel Mount
Housing
1
LED display
Display
2
LED display & arch
Control
0
N/A
0
None
Transmitter
1
4-20 mA
0
1%
Accuracy
1
0.50%
- 01
0 – 0.50”
- 02
0 – 1”
- 03
0 – 2”
- 04
0 – 3”
- 05
0 – 4”
- 06
0 – 5”
- 07
0 – 8”
- 08
0 – 10”
- 09
0 – 15”
- 10
0 – 20”
Range
- 11
0 – 30”
Maximum Pressure: Ranges ≤ 4” w.c. = 2 PSI; Ranges ≥ 5” w.c. = 10 PSI
Media compatibility: Air and compatible non combustible, non corrosive
gasses
Accuracy*: Axxx0-xx - 1.00%; Axxx1-xx - 0.50%
Temperature Ranges:
Compensated: -10° to 140°F (-23° to 60°C)
Operating: -10° to 140°F (-23° to 60°C)
Thermal Effect*: +/- 0.012% FS/°F
Output Signal: 4-20 mA (option)
Loop Resistance: 750 Ω Max (for internally sourced power); 1800 Ω Max
(for externally sourced power of 36 VDC)
Power Supply: Universal 16-265 VAC or VDC
Housing Material: Glass Filled Nylon
Enclosure Rating: Designed to meet NEMA 4X face; with optional cover
entire product is weatherproof
Electrical Connections: screw terminals
Response Time: <100 ms
Display: 4 Digit, red LED, ½” digits
Process Connection: Push on connection for 3/16” tubing
Agency Approvals: Pending – UL, C-UL, CE
Patents Pending
* Custom calibration including improved accuracy and improved thermal
effect are available.
Flush Mounting – For new applications, cut a 4 9/16” hole in the panel.
Insert the control with the provided gasket through the hole and secure it to
the panel with the provided mounting tabs and screws. Retrofitting old
technology is also easy with the Series A1 and A2. They have been
designed to fit in industry standard holes ranging from 4 9/16” to 4 13/16” so
simply remove the old device and insert the new control into the existing
cut out.
Surface Mounting – Surface mounting the Series A1 or A2 requires the
optional weather proof cover. Once the control is wired and the weather
proof cover has been attached, the control can be mounted to any flat
surface with the four mounting screws provided with the cover.
Flush Mounting with Weather Proof cover – The Series A1 and A2 can also
be flush mounted with a weather proof cover. The procedure is the same as
above, but utilizes two extra long mounting screws (provided with the
weather proof cover) for the bottom two panel connections.
Flush Mounting Surface Mounting
Flush Mounting with Weatherproof Cover
1. INTRODUCTION
2. INSTALLATION
1.1 Model Number Configuration
1.3 Dimensional Drawings
1.2 Specifications
2.1 Mounting
Series A1 & A2
Installation and Operation
Manual
Two 3/16” pressure connections are located on the back of the unit, labeled
“High” and “Low”. For best results, connect 3/16” I.D. push on tubing to
the pressure connections. If the High connection has a greater absolute
value than the Low connection, the front display will give a positive value.
If the HI connection has a lower absolute value than the LO connection, the
front display will give a negative value.
NOTES:
1. Supply Voltage is universal from 16-265 VAC or VDC
2. For internally sourced 4-20 mA loop, maximum loop resistance is
750 Ω; for externally sourced loop at 36 VDC, maximum loop resistance
is 1800 Ω.
3. Isolation:
4-20 mA: 5000 VAC to all other inputs and outputs
The series A1 displays pressure on a 4 digit LED display and will show 3 or
4 digits depending on the range and accuracy of the product. Negative
pressure will be indicated by a negative sign before the numerical
indication. Units of measure are displayed above the 4 digit LED display
by LED indicators. The Series A2 adds a process arch, which is designed to
mimic the indicating needle of a mechanical gauge. The process arch will
light up from left to right as the pressure moves away from zero.
The A1 and A2 have four buttons located on the face of the gauge for set-up
and calibration. There is a Span, Zero, Units, and Lock button. The Units
button changes the unit of measure and the Lock button locks and unlocks
the keypad on the gauge. Span and Zero are used for calibration (see
calibration section 4.2).
By simultaneously pressing the span and zero buttons for 3 seconds, the unit
will be switched from internally sourcing the power for the current loop to
requiring an external power supply.
Optilink™ is an infrared communications technology that allows the user
to upload and download program parameters from one unit to another with
a programming key. By using the PK-01 universal programming key, the
user may program one unit, download those parameters to the universal
programming key and then upload that same program from the key to other
controls. By using a PK-02 lockout programming key, a user may
completely lock (or unlock) the face keypad of the control to eliminate the
possibility of unwanted tampering of the control.
Periodically, it may be necessary to recalibrate the gauge to maintain the
accuracy of the product. To “zero” the gauge, remove the pressure
connections from both pressure ports and hold the zero button for 3
seconds. To “span” the gauge, apply the full scale pressure to the High
pressure port and hold the span button for 3 seconds while maintaining the
full scale pressure. Pressure must be maintained at zero or span during the
calibration process. Because the span and zero are non interactive, this
should complete the calibration process.
The 4-20 mA process output is set to give a linear output from 0 to the full
scale pressure range of the product. Other pressure spans such as bidirectional or reduced ranges can be scaled with an OptiLink™
programming key, consult the factory for details.
LIMITED WARRANTY
SENSOCON warrants its products to be free from defects in materials
and workmanship for a period of one (1) year from the date of
shipment, subject to the following terms and conditions: Without
charge, SENSOCON will repair, replace, or refund the purchase price
at SENSOCON’s option products found to be defective in materials or
workmanship within the warranty period; provided that:
i. the product has not been subjected to abuse, neglect,
accident, incorrect wiring not our own, improper
installation or servicing, or use in violation of labels
or instructions provided by SENSOCON;
ii. the product has not been repaired or altered by
anyone except SENSOCON;
iii. the maximum ratings label and serial number or date
code have not been removed, defaced, or otherwise
changed;
iv. examination discloses, in the judgment of
SENSOCON, the defect in materials or workmanship
developed under normal installation, use and service;
and
v. SENSOCON is notified in advance of and the
product is returned to SENSOCON transportation
prepaid before expiration of the warranty period.
THIS EXPRESS LIMITED WARRANTY IS IN LIEU OF AND
EXCLUDES ALL OTHER REPRESENTATIONS MADE BY
ADVERTISEMENTS OR BY AGENTS AND ALL OTHER
WARRANTIES, BOTH EXPRESS AND IMPLIED. THERE ARE
NO IMPLIED WARRANTIES OF MERCHANTABLILTY OR OF
FITNESS FOR A PARTICULAR PURPOSE FOR GOODS
COVERED HEREUNDER.
Process Arch (A2 only )
LED Pressure
Indication
Unit Indication
Negative
Indication
4. OTHER FEATURES
3. OPERATION
2.3 Electrical Connections
2.2 Pressure Connection
3.2 Key Function
3.1 Display
4.1 Opti-Link
4.2 Calibration
4.3 Limited Warranty
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