User Manual
DPR302/DPR305
DPR302 - Differential Pressure Manometer (2PSI)
DPR305 - Differential Pressure Manometer (5PSI)
Introduction
Thank you for selecting the Triplett DPR302 Differential Pressure
Manometer. This device measures gauge and differential pressure in
the range of ±2.000 psi. The DPR302 offers eleven (11) units of
measure (user selectable by front panel pushbutton) and has a
differential input that uses convenient quick‐disconnect fittings.
Advanced features include DATA HOLD, MIN‐MAX‐AVG RECORD
mode, ZERO/OFFSET, AUTO POWER OFF
Description
Buttons
The meter has six buttons.
1. BACKLIGHT
2. DIF
3. HOLD
4. ZERO
5. UNITS
6. REC
7. ON/OFF
Display Description
1. Hold Function
2. Differential Mode
3. Primary Data screen
4. Auto Power Off
5. Record Mode
6. MAX/MIN/AVG
7. Low Battery indicator
8. Pressure Unit indicator
9. Relative Time Clock
Operation
Power
Press the ON/OFF button to turn power on or off. The meter will
perform a short self-test when turned on. The meter defaults to
the setting used during the last operation.
Zero Adjust and Offset
Before use and without fittings attached to the meter, press the
ZERO button for more than 2 seconds to zero the meter .The meter
will reset and display“oooo ”
from right to left. 0.000 will be display.
If it is desired to offset the meter and display, press the DIF
button while taking a measurement Subsequent reading will be
the difference between the current measurement and the
measurement that was on the display when the DIF button was
pressed.
Data Hold
Press the HOLD button momentarily to freeze the displayed
reading. The ‘HOLD’ icon will appear on the upper left-hand side
of the display. If the pressure value is over the range, error codes
will show on the screen.
Press the HOLD button again to return to normal operation.
Record
The MAX/MIN mode allows the user to view only the highest
(MAX) , lowest (MIN)or average (AVG) readings with relative time
stamp.
1. Press the REC button once and REC appears on the display (All
other functions are locked out except for Power & Backlight).
The relative time clock also appears in the secondary display
and starts counting.
2. Press the REC Button again and MAX appears on the display
.The display is now showing the maximum pressure and relative
time that it was recorded.
3. Press the REC button to display the minimum MIN reading
with the relative time.
4. Press the REC button to display the average value AVG
reading with the relative time.
5. Press the REC button again to continue recording MAX/MIN
/AVG measurements.
6. To exit the MIN/MAX/AVG mode, press the REC button for
3 seconds to return to normal operation.
Backlight Display
Press the Backlight button to turn on the backlight.
It will remain on for 40 seconds.
Automatic Power Off (APO)
The meter will automatically shut off after 20 minutes to
conserve battery life. To disable Auto Power Off , hold down the
HOLD button and turn on the meter on , An “n” will appear in the
display indicating that Auto Power Off mode is disabled. The meter
will return to normal operation when it is turned off.
Units
Press the Unit button momentarily and the meter will cycle
through the 11 available units of measure as indicated by the
cursor on the bottom of the display.
Error Codes
An error message will appear on the display if the meter fails an
internal diagnostic test. And it will freeze all the buttons.
Err.1: Pressure value is over the range.
Err.2: Pressure value is below the range.
Err.3: DIF function, the differential pressure value is over range.
Err4: DIF function, the differential pressure value is below
range.
BATTERY REPLACEMENT
When the battery is LOW, “BAT” will appear on the LCD. Replace
the battery.
Battery Safety Notes: Please dispose of batteries responsibly; never
dispose of batteries in a fire, batteries may explode or leak. If the meter
is not to be used for 60 days or more, remove the battery and store
separately.
Never dispose of used batteries or rechargeable batteries in
household waste.
As consumers, users are legally required to take used batteries
to appropriate collection sites, the retail store where the
batteries were purchased, or wherever batteries are sold.
Disposal: Do not dispose of this instrument in household waste. The user is
obligated to take end‐of‐ life devices to a designated collection point for
the disposal of electrical and electronic equipment.
Specifications
Display Dual LCD
Accuracy ±0.3%FSO ( 77°F/25 °C )
Repeatability ±0.2% (Max.+/ -0.5% FSO)
Linearity/Hysteresis ±0.29% FSO
Pressure Range
2 psi (DPR302)
5 psi (DPR305)
Maximum Pressure 10psi(DP302)/20psi (DP305)
Response Time 0.5 Seconds typical
Low Battery Indicator Yes
Over range Indicator Err.1
Under range Indicator Err.2
Operating Conditions 32°F to 122°F ( 0 to 50°C)
Storage Conditions 14 to 140°F ( -10 to 60°C)
Power Supply (3)1.5V “AAA” batteries
DPR302
Function
Range
Resolution
Function
Range
Resolution
inH20
55.40
0.01
ozin
2
32.00
0.01
psi
2.000
0.001
ftH20
4.612
0.001
mbar
137.8
0.1
cmH20
140.6
0.1
kPa
13.79
0.01
kgcm
2
0.140
0.001
inHg
4.072
0.001
bar
0.137
0.001
mmHg
103.4
0.1
DPR305
Function
Range
Resolution
Function
Range
Resolution
inH20
138.4
0.1
ozin
2
80.00
0.01
psi
5.000
0.001
ftH20
11.53
0.01
mbar
344.7
0.1
cmH20
351.5
0.1
kPa
34.47
0.01
kgcm
2
0.352
0.001
inHg
10.18
0.01
bar
0.345
0.001
mmHg
258.6
0.1
Warranty
Triplett / Jewell Instruments extends the following warranty to the original purchaser of
these goods for use. Triplett warrants to the original purchaser for use that the products
sold by it will be free from defects in workmanship and material for a period of (1) one
year from the date of purchase. This warranty does not apply to any of our products
which have been repaired or altered by unauthorized persons in any way or purchased
from unauthorized distributors so as, in our sole judgment, to injure their stability or
reliability, or which have been subject to misuse, abuse, misapplication, negligence,
accident or which have had the serial numbers altered, defaced, or removed.
Accessories, including batteries are not covered by this warranty
Copyright © 2021 Triplett
www.triplett.com
