WARNINGS AND PRECAUTIONS
These warnings and precautions are to help you to understand how to safely operate the MXR
Flowmeter. A WARNING alerts you to a possible hazard to people. A CAUTION alerts you to the
possibility of equipment damage.
WARNING:
Do not use this device for the administration of general anesthesia or as a part of, or in
conjunction with, a general anesthesia administration system.
WARNING:
Dental workers are exposed to N
2
O during administration of N
2
O / O
2
conscious sedation
analgesia. NIOSH has recommended that exposures should be minimized. Contact NIOSH (1-800-35-
NIOSH) to receive NIOSH Publications on
Control of Nitrous Oxide in Dental Operatories.
Exposure can be
minimized by effective controls. National Institute for Occupational Safety and Health (NIOSH) publications
state that controls, including System Maintenance, Ventilation and Work Practices can effectively reduce
N
2
O concentrations in dental operations. Your flowmeter accessory Porter scavenger system is an
important part of the system of controls.
WARNING:
Porter Instrument equipment utilizes the
cross+protection
system. The flexible hose and
connectors that connect to the flowmeter are diameter indexed; 3/8” O.D. for Nitrous Oxide and 1/2” for
Oxygen. The
cross+protection
system is designed to prevent misconnection of Oxygen and Nitrous Oxide
piping.
DO NOT ATTEMPT TO CHANGE THE DIAMETERS OR CONNECTORS OF THE FLOWMETER!
Tampering with the
cross+protection
system constitutes acceptance of liability
by the installer. For your
own protection, as well as that of the Doctor and the patients, use 3/8” O.D. tubing for all Nitrous Oxide
lines and 1/2” O.D. tubing for all Oxygen lines.
To assure safe operation and conformation to local fire codes, all Porter Instrument flowmeter systems are
designed to be used with sedation delivery systems mounted inside walls and they meet or exceed the
guidelines established by the National Fire Protection Association for Nonflammable Medical Gas Systems,
NFPA 99. Copies of NFPA 99 or portions thereof may be obtained by writing to: National Fire Protection
Association, Batterymarch Park, Quincy, MA 02269-9904; or call 1-800-344-3555
WARNING:
New or modified installations -
properly connected gas pipelines are absolutely essential
to patient safety.
The dealer or contractor should provide written documentation that all gas pipelines are
connected properly and that the system has been pressure tested prior to use. While this is a good
business practice, it is important that the user verify by their own test, independent of the dealer or
contractor, that all gas pipelines are connected correctly prior to using the system.
The ultimate
responsibility of assuring that lines are not crossed rests with the user.
WARNING:
Do not use an electrical cord with nicks, cuts, or other damage. Do not use the
unit with an extension cord as it will be subject to electromagnetic interference (EMI).
WARNING:
During any extended power outage, remember to turn the On / Standby (Off)
switch to the STANDBY position on the flowmeter and manually turn OFF the tank valves.
With centralized, electrically powered gas systems, if gas was flowing when the power went
out and the flowmeter is left ON, gas will be flowing when the power is restored.
CAUTION:
Federal law (U.S.) restricts this device for use by or on the order of a physician, dentist or
licensed practitioner.
CAUTION:
Always use clean, dry medical grade gases. Introduction of moisture or other contaminants into
this device may result in defective operation.
CAUTION:
Do not attempt to repair, alter or calibrate this device. Unauthorized repair, alteration or misuse
of this device is likely to adversely affect the performance and will void the warranty.
CAUTION:
Never oil or grease any part of this system (minimize fire or explosion potential).
CAUTION:
There are no user-serviceable parts inside this unit. A shock hazard exists if power
is not disconnected prior to any internal servicing or maintenance. Always disconnect the power
source before inspection or repair.
CAUTION:
Do not change any internal factory set adjustments. The Porter Digital MXR is
adjusted and calibrated for proper operation prior to shipment. Any change could alter the
specified operation and accuracy.
CAUTION
:
When installing or if switching gas fittings is required, be sure to
use two wrenches when
tightening or removing hoses from the gas fittings.
Instructions for switching gas fittings are detailed
on page 10, Section 3.
6