Just Better DM-2 User Manual
Digital Manifold
Superheat/Subcooling, Charging/Testing Manifold
& Operating Instructions
®
NOT INTENDED FOR USE ON HAZARDOUS OR CORROSIVE FLUIDS
LOW SIDE DISPLAYS
PRESSURE, SUPERHEAT,
TEMPERATURE (T1) and SATURATION
TEMPERATURE
PUSH to toggle between displays
PUSH once to display MAXIMUM,
MINIMUM and AVERAGE values of
current displays
HOLD DOWN to clear memories
Use Temperature Jack (T1) for
Superheat Testing
Uses one or two 9v Alkaline batteries
(Two batteries included)
Batteries can be replaced by taking
off the back of the box
GAUGE SPECIFICATIONS:
Pressure display range: 29 InHg to 600 psig (-98kPa to 4134 kPa)
(+/- 1 PSI to 200 psi, 0.5% to 600 psi)
Temperature display range: -40 °F to 200°F (-40°C to 93 °C)
Operating temperature: -10°F to 120°F (-12 °C to 49 °C)
(+/- 1 °F * 32°F/120 °F, +/- 1.5 °F * -10 °F/32 °F)
Maximum overpressure: 800 psig (5512 kPa)
Battery life and type: 6 Months with two 9v Alkaline battery
Auto-shutoff time: 60 minutes (extended 60 minutes by any button touch)
24 hour mode also available
Refrigerant data source: NIST REF PROP software and manufacturers data
PUSH once to turn ON or OFF
PUSH twice to select 1 hr/24 hr mode
HIGH SIDE DISPLAYS
PRESSURE, SUBCOOLING and
TEMPERATURE (T2), and (T1-T2)
DIFFERENCE
PUSH to toggle between displays
PUSH to select refrigerant (32 available)
HOLD DOWN to change units to Metric
or English
Use Temperature Jack (T2) for
Subcooling Testing
REFRIGERANT PLUG-IN
The manifold holds up to 32 refrigerants.
These are contained in a replaceable plug-in
part. This is servicable by manufacture only.
A list of refrigerants included with the stock
manifold is shown on page 4.
APPLICATION TIPS:
Zero Before Pressure Is Applied
Allow the manifold to Zero at Turn-On: The manifold displays
will zero each time the manifold is turned on without
pressure. Zeroing the gauge compensates the Pressure
display for changes in (1) Altitude and (2) Barometric pressure.
Pressure Calibration
Don't be alarmed if your digital manifold does not agree with
your mechanical gauges. The digital manifold is calibrated
with a very accurate pressure and is not affected by vibration,
motion or position.
Extending On-Time
The digital manifold will turn off automatically after 60
minutes to save battery life. If any button is touched, the
manifold will stay on for another 60 minutes.
The on time can be extended to 24 hours by pushing the ONOFF button 2 times quickly.
Over/Under-Range Indicator
Pressures or temperatures below or above the rated
ranges will cause a “1” to be displayed.
Low Battery Indicator
Low batteries will be indicated by a blinking display and/or
faded numbers.
Batteries For Low Temperature Applications
Using standard batteries in low temperature condtions
will shorten the life. Change to 9 volt lithium batteries
(Radio Shack part number 23-665) to get longer life.
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