Dwyer DM-1200 User Manual
Bulletin P-DM-1200
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PRESSURE
CONNECTIONS
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Series DM-1200 DigiMag®Digital Differential Pressure and Air Flow Gage
Specifications - Installation and Operating Instructions
he Series DM-1200 DigiMag
T
s the ideal digital instrument to take the place of analog mechanical pressure
i
ages. The DigiMag
g
ability to be field-programmed to select pressure, air velocity or flow operation. The
®
DigiMag
applications where a set point can be input where the display will blink when the
filter is dirty, alerting the user that a maintenance action needs to occur.
Programming the Series DM-1200 is easy using the menu key to access 4
simplified menus which provide access to: Security level; engineering units; Kfactor for use with various Pitot tubes and flow sensors, circular or rectangular duct
size for volumetric flow operation; filter set point; view peak and valley process
readings; digital damping for smoothing erratic process applications; display
update to conserve battery life; zero and span field calibration.
The Series DM-1200 DigiMag
possesses a full-scale accuracy of 1% on ranges down to 2˝ w.c. and 2% accuracy
down to the very low ranges of 1˝ to 0.25˝ w.c. DigiMag
Pressure Gages offer power versatility by working with 9-24 VDC line power or
simply 9V battery power. If using line power and connecting the 9V battery, the
battery will act as a back-up if line power is lost or interrupted.
Digital Differential Pressure Gages have an added feature for filter
®
®
igital Differential Pressure and Air Flow Gage
D
igital Gages are more versatile than analog gages with their
D
®
Digital Differential Pressure and Air Flow Gage
®
Digital Differential
PECIFICATIONS
S
ervice: Air and non-combustible, compatible gases.
S
etted Materials: Consult factory.
W
Housing Materials: Glass filled plastic.
Accuracy: ±1% F.S. including linearity, hysteresis and repeatability; ±2% F.S. for
ranges 1˝ w.c. and below.
Temperature Limits: 0 to 140°F (-18 to 60°C).
Compensated Temperature Limits: 32 to 122°F (0 to 50°C).
Long Term Stability: ±1% F.S. per year.
Thermal Effect: ±0.05% F.S./°F typ.; ±0.10% F.S./°F for ranges 1˝ w.c. and
below.
Display: 4-digit LCD (Digits: 0.60˝H x 0.33˝W).
Display Update: Selectable for 1 second to 10 minutes or update only from
button push.
Pressure Limits: 5˝ w.c. and lower = 2 psi (13.7 kPa) 10˝ w.c. and higher = 11
psi (75 kPa).
Power Requirements: 9V battery or external power supply 9-24 VDC. Battery
included but not connected.
Type of Battery: 9V alkaline battery (Duracell
Battery Service Life: Battery life depending on the Display Update setting: 150
hours (typical) if Display Update = 1 second; 9 months (typical) if Display Update
= 10 minutes; 1.5 years (typical) if Display Update is disabled. Battery may last
up to four times longer when using lithium-based battery ULTRALIFE U9VL-J.
Current Consumption: 5 mA maximum.
Electrical Connections: Removable terminal block for 16 to 26 AWG.
Electrical Entry: Cable gland for 0.114 to 0.250˝ (2.9 to 6.4 mm) diameter cable.
Process Connections: 3/16˝ I.D. tubing (5 mm I.D.), maximum O.D. 3/8˝ tubing.
Enclosure Rating: NEMA 4X (IP66).
Weight: 1.18 lb (535 g).
Size: 5˝ (127 mm) O.D. front face.
Agency Approvals: CE, EN 61326-1 [Immunity Test Requirement for Industrial
Environments] with the following SPEC:
IEC61000-3-2
IEC61000-3-3
IEC61000-4-2
IEC61000-4-3
IEC61000-4-4
IEC61000-4-5
IEC61000-4-6
IEC61000-4-11
®
Duracell
is a registered trademark of The Gillette Company.
®
PC 1604 or equivalent).
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: info@dwyer-inst.com
Phone: 219/879-8000 www.dwyer-inst.com
NSTALLATION
I
ounting
M
vertical position required. That is the position in which all standard models are
A
alibrated at the factory. Provide a 4-9/16˝ diameter opening in panel. Insert gage
c
and secure in place with provided screws and adapters.
Included Accessories:
ounting lugs –3
M
-20 x 2-1/2 screws –3
6
-20 x 3/8 screws – 3 (mounting hole depth is 3/8˝ [9.53])
4
able gland –1
C
PERATING INSTRUCTIONS
O
Key Functions
IGURE 1
F
Pressure Connections
Two integral tubing connections are provided on the back of the gage. They are
sized to fit 3/16˝ (4.8 mm) I.D. x 5/16˝ (7.9 mm) O.D. flexible PVC tubing. To
easure single positive pressure, connect tubing to the + port and vent the – port
m
o atmosphere. To measure single negative pressure (vacuum), connect tubing to
t
he – port and vent the + port to atmosphere. To measure differential pressure,
t
connect higher pressure to the + port and lower pressure to the – port. Be sure the
pressure rating of the tubing exceeds that of the operating ranges.
Electrical Connections
A 9V battery or an external power supply 9-24 VDC can be used to power the unit.
If both battery and external power supply are connected, the battery will work as
back up power.
Battery Installation
The unit is shipped with a separate 9V alkaline battery. Remove the unit’s top back
cover then connect the 9V battery to the battery holder as shown in Figure 1.
External Power Supply Installation
Remove the unit’s back cover then connect the external power supply to the
terminal block as shown in Figure 1.
CAUTION: POWER MUST BE OFF WHILE WIRING
CONNECTIONS ARE BEING MADE. DO NOT EXCEED
SPECIFIED SUPPLY VOLTAGE RATINGS. PERMANENT
DAMAGE NOT COVERED BY WARRANTY WILL RESULT.
enu
M
Up Arrow
own Arrow
D
Enter
Home Position
Function
llows access to the
A
enus
m
Displays pressure
readings instantly
(rAtE KEY MODE only)
Displays full scale
range of unit
Main Menu
Function
eturn to home
R
osition
p
Sequences through
menus
equences through
S
enus
m
Enter into SUB
MENU
ub Menu
S
unction
F
eturn to previous
R
menu
Increments a value
Decrements a value
hanges a value or
C
setting. Press
ENTER and display
will blink. Adjust with
UP or DOWN
arrows. Press
ENTER to store.
Display will stop
blinking.
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