Dwyer DM-1200 - Manual (Page 2)

INSTALLATION
Mounting
A vertical position required. That is the position in which all standard models are
calibrated at the factory. Provide a 4-9/16˝ diameter opening in panel. Insert gage
and secure in place with provided screws and adapters.
Included Accessories:
Mounting lugs – 3
6-20 x 2-1/2 screws – 3
4-20 x 3/8 screws – 3 (mounting hole depth is 3/8˝ [9.53])
Cable gland – 1
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
measure single positive pressure, connect tubing to the + port and vent the – port
to atmosphere. To measure single negative pressure (vacuum), connect tubing to
the – port and vent the + port to atmosphere. To measure differential pressure,
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.
OPERATING INSTRUCTIONS
Key Functions
Home Position
Function
Allows access to the
menus
Displays pressure
readings instantly
(rAtE KEY MODE only)
Displays full scale
range of unit
Main Menu
Function
Return to home
position
Sequences through
menus
Sequences through
menus
Enter into SUB
MENU
Sub Menu
Function
Return to previous
menu
Increments a value
Decrements a value
Changes a value or
setting. Press
ENTER and display
will blink. Adjust with
UP or DOWN
arrows. Press
ENTER to store.
Display will stop
blinking.
FIGURE 1
Menu
Up Arrow
Down Arrow
Enter