
DRS220 Digital Refrigerant Scale
®
Instruction Manual
DRS220
The DRS220 Digital Refrigerant Scale is warranted to be free from defects in materials and
workmanship for a period of one year from the date of purchase. If within the warranty period
your instrument should become inoperative from such defects, the unit will be repaired or
replaced at UEi’s option. This warranty covers normal use and does not cover damage which
occurs in shipment or failure which results from alteration, tampering, accident, misuse, abuse,
neglect or improper maintenance. Batteries and consequential damage resulting from failed bat-
Digital
Refrigerant
Scale
Any implied warranties, including but not limited to implied warranties of merchantability and
fitness for a particular purpose, are limited to the express warranty. UEi shall not be liable for
loss of use of the instrument or other incidental or consequential damages, expenses, or eco-
nomic loss, or for any claim or claims for such damage, expenses or economic loss. A purchase
receipt or other proof of original purchase date will be required before warranty repairs will be
rendered. Instruments out of warranty will be repaired (when repairable) for a service charge.
For returm authorization and a service number contact UEi or visit us online.
You may also have other rights which vary from state to state.
Limited Warranty
teries are not covered by warranty.
Return the unit postage paid and insured to:
8030 SW Nimbus Avenue, Beaverton OR 97008
CALL: 1-800-547-5740 • FAX: (503) 643-6322
www.ueitest.com • Email: info@ueitest.com
This warranty gives you specific legal rights.
1-800-547-5740 • WWW.UEiTEST.COM • info@UEiTEST.COM
USA: 1.800.547.5740 • Fax: 503.643.6322
CANADA: 1-877-475-0648 • Fax: 604.278.8299
WWW.UEiTEST.COM
COPYRIGHT © 2011 UEi.

DRS220 User’s Guide
Introduction
Thank you for your purchase of the UEI DRS220 Digital Charging Scale. The
DRS220 is the most accurate and precise refrigerant meter available today with
features that cannot be found anywhere else. It is ideal for HVAC and Refrigeration
service, including Critical Charging of small refrigeration systems.
With the DRS220, you can measure weight in both metric and english units. The
DRS220 is programmable, and has a built in alarm to indicate a programmed
threshold has been exceeded. Attaching the DRS220 to the DRSCM (optional,
extra) allows automatic refrigerant charging for A/C systems.
Features
• Large, high-visibility LCD display
• Measures Weight in kgs and lbs
• Built-in memory remembers all previous settings
• Refrigerant Tank Capacity Indicator
• Rugged, Compact Design
• Long Battery Life
• High Accuracy and Resolution
• Programmable
• Can be calibrated in the field with inexpensive reference weights
• Expandable with DRSCM Charge module (not included)
Specications
Capacity 100 kilograms (220 Pounds)
Accuracy 0.5% of Reading +/- 1 Least Significant Digit
Resolution 2g, 0.005 lbs., 0.1 oz.
Powe
r 4 x 1.5V ‘AAA’ Alkaline Batteries (6 VDC)
Battery Life 30 hours continuous use
Operating Temperature 0°C – 60°C (32°F – 140°F)
Weight 2.5 kg (5.5 lbs.)
Dimensions 26.7 cm x 26.7 cm x 4.5 cm (10.5” x 10.5” x 1.75”)
NOTE: To prevent damage, never exceed the rated capacity of the DRS220.
1

DRS220 User’s Guide
B I H C F D A G K J L P O M N E
DRS220 User’s Guide
Parts Diagram
Weighing
Platform
LCD Display
Mounting
Hooks
Optical Port
for CM-500
Battery
Cover
Storage
Dock
Easel
(Extended)
Keypad
Coiled
Easel
(Retracted)
Speaker
Grill
LCD Display
Item
A Main Numeric Display
B Alternate Numeric Display
C Tank Capacity Percent Indication
D Units Indicators
E Sound Mute Indicator
“Floating” Negative Indicator (Indicates weight removed from
F
platform)
G Battery Level Indicator
H Fast Adjustment Indicator
I Set Mode Indicator
J Tank Capacity Mode Indicator
K Run Mode Indicator
L Hold Mode Indicator
M Program Complete Indicator
N Calibration Mode Indicator
O Valve Open/Closed Indicator for use with CM-500
P Resolution Indicator
Function
2
3