7
Introduction
The PhD Ultra is a personal, portable, microprocessor controlled gas detector that can monitor up to four
atmospheric hazards simultaneously. The PhD Ultra measures oxygen, combustible gas, and up to two additional
toxic gases. The PhD Ultra uses a top-mounted, back-lit, "Supertwist" LCD (liquid crystal display) to
simultaneously show readings of the gases being measured. A loud audible alarm and individual alarm lights for
each gas being monitored warn users of hazards.
The PhD Ultra offers a choice of three modes of operation, providing the right amount of information for users with
different needs. The PhD Ultra microprocessor software allows true one-button operation. All procedures
necessary for day-to-day operation, including automatic calibration adjustment, are controlled through the single
on / off “mode” button. Biosystems EEPROM equipped “Smart Sensors” automatically let the instrument know
which sensors are currently installed, assign the appropriate alarm settings, and let the instrument know if any
changes have been made to the sensors since the last time the instrument was turned on. Two types of
interchangeable battery packs (NiCad and disposable alkaline) provide up to 12 hours of continuous use.
The PhD Ultra is Classified by Underwriters Laboratories, Inc. and the Canadian Standards Association as to
Intrinsic Safety for use in Hazardous Locations Class I, Division 1, Groups A, B, C, and D.
Classification for intrinsic safety is based on tests conducted in explosive gas / air (21 % oxygen) mixtures only.
The PhD Ultra should not be used for combustible gas monitoring in atmospheres where oxygen concentrations
exceed 21.0% oxygen.
ONLY THE COMBUSTIBLE GAS DETECTION PORTION OF THIS INSTRUMENT HAS BEEN ASSESSED FOR
PERFORMANCE BY CSA.
UNIQUEMENT, LA PORTION POUR DÉTECTER LES GAZ COMBUSTIBLES DE CET INSTRUMENT A ÉTÉ ÉVALUÉE
PAR UNDERWRITERS LABORATORIES.
SUBSTITUTION OF COMPONENTS MAY IMPAIR INTRINSIC SAFETY.
AVERTISSEMENT: LA SUBSTITUTION DE COMPOSANTS PEUT COMPROMETTRE LA SÉCURITÉ INTRINSÈQUE.
FOR SAFETY REASONS THIS EQUIPMENT MUST BE OPERATED AND SERVICED BY QUALIFIED PERSONNEL
ONLY. READ AND UNDERSTAND THE INSTRUCTION MANUAL COMPLETELY BEFORE OPERATING OR
SERVICING.
ATTENTION: POUR DES RAISONS DE SÉCURITÉ, CET ÉQUIPMENT DOIT ETRE UTILISÉ, ENTRETENU ET RÉPARÉ
UNIQUEMENT PAR UN PERSONNEL QUALIFIÉ. ÉTUDIER LE MANUEL D'INSTRUCTIONS EN ENTIER AVANT
D'UTILISER, 'ENTRETENIR OU DE RÉPARER L'ÉQUIPMENT.
ANY RAPID UP-SCALE READING FOLLOWED BY A DECLINING OR ERRATIC READING MAY
INDICATE A GAS CONCENTRATION BEYOND UPPER SCALE LIMIT WHICH MAY BE HAZARDOUS.
Avertissement: Toute lecture rapide et positive, suivie d'une baisse subite au erratique de la valeur, peut
indiquer une concentration de gaz hors gamme de détection qui peut être dangereuse.
Signal Words
The following signal words, as defined by ANSI Z535.4-1998, are used in the PhD Ultra
Reference Manual.
indicates an imminently hazardous situation which, if not avoided,
will result in death or serious injury.
indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury.
indicates a potentially hazardous situation, which if not avoided, may
result in moderate or minor injury.
CAUTION
used without the safety alert symbol indicates a potentially hazardous situation
which, if not avoided, may result in property damage.
