INDUSTRIAL MEASUREMENT & CONTROL
Engineering Unit Display Meter
Field Instrument Solutions
Digital Display of Measurements in Real Engineering Units
Historically an analog moving coil meter was used for local measurement or control loop
displays, but the preference now in many applications is for digital display of temperature,
pressure, level, flow, or other measurements in real engineering units. Honeywell’s Engineering
Unit (EU) Display Meter provides a universal solution for 4-20mA measurement displays by
converting any 4-20mA signal into an LCD digital display in the preferred engineering units.
Configuration Features
The EU Display Meter is available for remote-mount field use or can be integrally mounted
in the STT150 or STT250 Temperature Transmitters or in the SMV 3000 Multivariable
• Calibration of the low and high
display ranges to 4 and 20mA
Transmitter. In the SMV 3000, it enables display of the flow PV4 when this is the
• Engineering unit selection
4-20mA output. In the STT250 Model STT25H with the HART* protocol or in the
• Display diagnostic check to
PC-configurable STT150 models, the transmitter LRV/URV range settings should be
duplicated in the EU Display Meter to obtain the preferred temperature unit display.
The EU Display Meter is connected in series with the 4-20mA loop and is powered by
ensure that all display segments
are operating correctly
-19990
Normal
Engineering
Unit Display
Lo
Edit Low
Range Value
Hi
Edit High
Range Value
EU
Edit
Engineering
Units
Clo
Calibrate
at 4.0mA
Chi
Calibrate
at 20mA
Lcd
Verify
Display
Elements
End
End of
Sequence
the loop power. It operates by processing the 4-20mA signal via an analog-to-digital
converter and scaling the digital measurement linearly into the desired operating
range, which the user configures into the meter. The LCD display includes a selection
of integral engineering units for temperature and pressure applications (e.g.,°C, °F, in
H2O, psi, etc. and a “K” multiplier that can be included when larger ranges require it).
The EU Display Meter also includes a bar-graph display of measured signal as a
percentage of the 16mA signal span. This enables confirmation from some distance
away that the measurement loop is operating satisfactorily or that attention is required.
The meter is configured by an integral selection switch, which enables setting the Low
(4mA) and High (20mA) display range limits.
Configuration Display Flow Chart
17-Segment Bar Graph (0 to 100%)
0
100
%
-188.80
Digital Readout (-19990 to +19990)
°F °C
%
FLOW
Status Indicators (Not used on this model)
Engineering Unit
Indicators
ANALOG
OUTPUT MODE
BAD XMTR STATUS
FAULT - LAST
KNOWN VALUE
In H 2 O
K
GPH mmHg
GPM PSI
A
K Multiplier–Indicates digital readout
is multiplied by 1,000
Configuration Toggle Switch
Condensed Specifications
Specification Summary
Digital Display Accuracy
+/-0.5% of Full Range
Digital Display Resolution
Shown as:
199.9
1999
19990
199.9 K
1999 K
19990 K
+/-0.05 for +/-199.9 reading range
+/- 0.5 for +/-1999 reading range
+/-5 for +/-19990 reading range
+/-50 for +/-199900 reading range
+/-500 for +/-1999000 reading range
+/-5000 for +/-19990000 reading range
Bar graph % Display Resolution
+/-3% of reading on 17-segment scale
Minimum loop current
3.6mA
Power supply Volts drop across meter
2.3V max with reverse polarity protection
Connection polarity
Yellow = Positive (+ve); Blue = Negative (-ve)
Rated
Extreme, Transportation, & Storage
Relative Humidity (%RH)
-40 to +185°F
-40 to +85°C
10 to 90%, non condensing
-58 to +194°F
-50 to +90°C
0 to 100%
Available Engineering Units
—Integral LCD indicator
—As stick-on label
°F, °C, %, in H2O, GPH, GPM, mmHg PSI, PSIA
Wide selection of printed units for temperature, pressure, and flow
Ambient Temperature
WARRANTY/REMEDY
Honeywell warrants goods of its manufacture as being free of defective material and faulty workmanship. Contact your local sales office for warranty information. If warranted goods
are returned to Honeywell during that period of coverage, Honeywell will repair or replace without charge those items it finds defective. The foregoing is Buyer’s sole remedy and is in lieu
of all other warranties, expressed or implied, including those of
merchantability and fitness for a particular purpose.
Honeywell Authorized Representative:
While we provide application assistance, personally, through our
literature and the Honeywell Web site, it is up to the customer to
determine the suitability of the product in the application.
Specifications may change at any time without notice. The
information we supply is believed to be accurate and reliable as
of this printing. However, we assume no responsibility for its use.
*HART is a trademark of the HART Communication Foundation.
U.S.A.: Honeywell Industrial Measurement and Control, 16404 North Black Canyon Hwy., Phoenix, AZ 85053 • Canada: The Honeywell Centre, 155 Gordon Baker Rd., North York, Ontario M2H 3N7
Latin America: Honeywell Inc., 480 Sawgrass Corporate Parkway, Suite 200, Sunrise, Florida 33325 • Japan: Honeywell K.K., 14-6 Shibaura 1-chome, Minato-ku, Tokyo, Japan 105-0023
Asia: Honeywell Pte Ltd., Honeywell Building, 17 Changi Business Park Central 1, Singapore 486073, Republic of Singapore • Pacific Division: Honeywell Pty Ltd., 5 Thomas Holt Drive, North Ryde
NSW Australia 2113 • Europe and Africa: Honeywell S. A., Avenue du Bourget 3, 1140 Brussels, Belgium • Eastern Europe: Honeywell Praha, s.r.o. Budejovicka 1, 140 21 Prague 4, Czech Republic
Middle East: Honeywell Middle East Ltd., Technology Park, Cert Complex, Block Q, Muroor Rd., Abu Dhabi, U.A.E.
Industrial Measurement and Control
www.honeywell.com/imc
SL-53-923 (2.5M) Rev. 6/02
©Honeywell International Inc.
Printed in U.S.A