DigiCal ™ Primary Calibrator Catalog No: 655101 INSTRUCTION MANUAL VERSION : 2 MSA Customer Service 1-800-MSA-2222 MINE SAFETY APPLIANCES COMPANY P.O. BOX 426 Pittsburgh, PA 15230 www.msanet.
LIMITATION OF LIABILITY The seller shall not be liable of any claim for consequential or special loss or damage arising or alleged to have arisen from any delay in delivery or malfunction or failure of the equipment. The Seller's liability for any other loss or damage arising out of or connected with the manufacture, sale or use of the equipment sold, including damage due to negligence, shall not in any event exceed the price of the equipment supplied by us.
Table of Contents WARRANTY Section : The Seller warrants to the Purchaser that any equipment manufactured by it and bearing its name plate to be free from defects in material or workmanship, under proper and normal use and service, as follows: if, at any time within 1 year from the date of sale, the Purchaser provides proof of purchase and notifies the Seller that in his opinion, the equipment is defective, and returns the equipment to the Seller's originating factory prepaid, and the Seller's inspection f
Section 1 Analysis of Air Flow Calibration a. Physics of Measurements: At room temperature, all gases obey - to a very close approximation - the ideal gas equation PV = nRT, where P is the pressure in newtons per square meter, V is the volume in cubic meters, n is the number of moles of gas, R is the empirically determined gas constant with the approximate value 8.31 joules/mole degrees Kelvin and T is the temperature in degrees Kelvin.
b. Accuracy of Gaseous Flow Measurements Section 7 Power Supply 1. The battery supply utilizes 4 Nicad batteries. The unit will operate up to 100 hours on a fully charged battery. The unit may also be operated directly from the AC charger when batteries are low. 2. Low battery light will indicate the power supply is too low for accurate results. 3. Charge battery pack for 16 hours minimum using the standard charger supplied with the unit. 4. A special power saving feature is the Automatic Shut Off.
Section 5 Section 2 Calibrator Maintenance Principle of Operation and Features General Information: a. Detection Principle: The DigiCal Calibrator utilizes the principle of measuring the flow rate of gases over a fixed volume per unit of time. A Quartz controlled timer is the timing device and the fixed volume is located in the flow cell center tube.
Section 4 Calibration Of Air Flow Sources With The DigiCal Calibrator The instructions relate to industrial hygiene air sampling. It, basically, applies to any gases flow rate measurements. 1. Start the pump and allow approximately 5 minutes to stabilize. Perform this step before connecting to flow cell as air flow dries center tube if bubbles are not initiated at intervals. 2. Connect sampling medium to pump by obtaining proper hose adapters for connecting tubing to flow cell.
Section 3 IMPORTANT INFORMATION Your MSA DigiCal Calibrator has new enhanced operational features. Effective October 1, 2005 Version 2 Start Up Procedure A. Read the previous section of Principle of Operation if unfamiliar with device. B. Soap volume is not critical, therefore a measured amount is not necessary. The proper amount is that which is sufficient to create a bubble.
