Cooper Instruments & Systems DPG 1000B Digital Pressure Gage - Manual (Page 2)

CF 130 2 DPG 1000B 02/09
Display Backlighting (BBL models only)
Display backlighting can be turned on by momentarily pressing the button whenever the gauge is on. The back-
lighting will turn on for one minute and then automatically shut off. This also restarts the auto shutoff timer.
Shut-Down
To shut off the gauge manually at any time, press and hold the pushbutton until the display indicates (about
5 seconds) and then release.
For gauges with auto shutoff, the display indicates
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 pushbut-
ton is pressed and released.
If the gauge was ordered without auto shutoff (-ON 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.
4.0 Calibration
All Cooper gauges are factory calibrated on NIST traceable calibration equipment. No calibration is required before
placing the gauge into service.
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 know 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.
3000 psi, 5000 psi ranges: The calibration adjustments are internal on these models.
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.
Gauges can be returned to Cooper Instruments for factory certified recalibration, repairs and refurbishment. 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.
5.0 Battery Replacement
A low battery indication will be shown in the upper left-hand corner of the display when the battery voltage falls suf-
ficiently. 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.