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Фрагмент инструкции
For gauges with auto shutoff, the display indicates OFF five seconds prior to auto shutoff. The pushbutton can be pressed to keep the gauge on. The auto shutoff and backlight (if equipped) timers are reset whenever the pushbutton is pressed and released. If the gauge was ordered without auto shutoff (NS option) it will stay on until manually shut off or until the batteries are depleted. Turn gauge off when not in use to conserve battery life. Battery Replacement – All Models A low battery indication will be shown in the upper left-hand corner of the display when the battery voltage falls sufficiently. The battery should be replaced soon after the indicator comes on or unreliable readings may result. Remove the 6 Phillips head screws on the back of the unit. Carefully remove batteries from the holders by lifting up the positive end of the battery (opposite the spring). Take care not to bend or distort the battery retention springs. DO NOT discard the old battery into fire, any other sources of extreme heat, or in any other hazardous manner. Please consult local authorities if there is any question about proper disposal. Always replace both batteries at the same time with high quality alkaline batteries. Observe the polarity of the batteries when replacing them. The negative (flat) end of each battery should be inserted first, and should face the spring in the battery holder. Replace the back cover, including the rubber sealing gasket. 1100B and 1100BBL (NEMA 4X) 1/4"NPT 3.38" 0.75" PSIG Span Zero 2.88" 1.65" Turn at hex fitting only OMEGA Engineering Inc./Made in USA 1/4"NPT 3.0" 3.5" 2.0" Turn at hex fitting only! PSIG Span Zero OMEGA Engineering Inc. / Made in USA 31/2 digit or 41/2 digit display 0.75" 31/2 digit or 41/2 digit display DPG1000B, DPG1001B, DPG1000BBL, DPG1100B, DPG1100BBL 3 CAUTION: Calibration Precautions Install or remove gauge using wrench on hex fitting only. Do not attempt to tighten by turning housing or any other part of the gauge. See label on back of gauge for range! Use fittings appropriate for the pressure range of the gauge. Do not apply vacuum to gauges not specified for vacuum operation. Permanent damage not covered by warranty will result to the sensor. Due to the hardness of 316 stainless steel, it is recommended that a thread sealant be used to ensure leak-free operation. NEVER insert objects into the gauge port or blow out with compressed air. Permanent damage not covered by warranty will result to the sensor. NOTE: Calibration Information All gauges are factory calibrated on NIST traceable calibration equipment. No calibration is required before placing the gauge into service. Gauges can be returned to Omega Engineering for factory certified recalibration. NIST traceability is available. Gauges can also be recalibrated by any metrology lab with pressure calibration equipment at least four times more accurate than the gauge. Absolute Reference – These models display atmospheric pressure if the gauge port is open to the ambient. It is normal for the reading to constantly change in response to atmospheric pressure changes. Vacuum generation and atmospheric pressure measurement equipment for accurate calibration and thus these are more difficult to calibrate in the field. Calibration Preparation – All Models a. Calibration should only be performed by qualified individuals using appropriate calibration standards and procedures. b. The calibration equipment should be at least four times more accurate than the gauge being calibrated. c. Remove the screws on the back of the unit and remove cover. d. It is good practice to install fresh batteries before calibrating battery- powered gauges. e. Allow the gauge to equalize to normal room temperature before calibration. DPG1000, DPG1001 - Pull out plastic DPG1100 - Unscrew nylon screws to plugs to access zero and span access zero and span potentiometers potentiometers Calibration of Ranges up to 1999 Remove the calibration potentiometer covers on the front of the unit to access the zero and span controls. Gauge reference units may be re-zeroed without affecting the span calibration. The gauge port must be open to the ambient with no pressure or vacuum applied. Adjust the Zero control until the gauge reads zero with the minus (–) sign occasionally flashing. Span calibration should only be attempted if the user has access to a pressure reference of known accuracy. The quality of the calibration is only as good as the accuracy of the calibration equipment and ideally should be at least four times the gauge accuracy. Zero calibration must be done before span calibration. Record readings at three to five points over the range of gauge and adjust span control to minimize error and meet specifications. DPG1000B, DPG1001B, DPG1000BBL Ranges 2000 and up DPG1100B, DPG...
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