Absolute Process Instruments Cecomp DPG2000B D4 Series Talimatlar - Sayfa 4
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Calibration
Calibration Preparation
Calibration must only be done in a non-hazardous area. See
Installation and Precautions.
Gauges are calibrated at the factory using equipment traceable
to NIST. There is no need to calibrate the gauge prior to use.
Calibration should only be performed by qualified individuals
using appropriate calibration standards and procedures.
Contact factory if assistance is required. Gauges can be
returned to factory for certified calibration and repairs. NIST
traceability is available.
Calibration intervals depend on your quality control program
requirements. Many customers use an annual calibration cycle.
The calibration equipment should be at least four times more
accurate than the gauge being calibrated.
The calibration system must be able to generate and measure
pressure and/or vacuum over the full range of the gauge.
A vacuum pump able to produce a vacuum of 100 microns
(0.1 torr or 100 millitorr) or lower is required for vacuum and
absolute gauges.
Warning: Never apply vacuum to gauge not designated for
vacuum service. Permanent sensor damage may result.
It is good practice to install fresh batteries before calibration.
Allow the gauge to equalize to normal room temperature (about
20 minutes minimum) before calibration.
Calibration
Internal Up/Down Buttons
See Calibration Preparation section. See rear label of gauge for
model identification and range.
Remove the 6 Phillips screws on the back of the unit and
remove the rear cover.
Move the switch on the circuit board to the ENABLE position.
Locate the internal UP and DOWN buttons on the circuit board.
Entering Calibration Mode
With the gauge off, press and hold the DOWN button, then
press the front button.
Release all buttons when the display indicates CAL.
The display begins by indicating the full-scale positive pressure
rating of the gauge in the engineering units as configured by
the factory, and then shows all display segments.
Before the gauge enters the calibration mode, the display ini-
tially indicates _ _ _ _ with the first underscore blinking, with
CALPC (calibration pass code) on the lower display.
Note: The gauge will automatically revert to normal operation
if no buttons are operated for approximately 15 seconds. To
cancel and return to normal operation, press and release the
front without entering any pass code characters.
Enter the pass code as described in the User Configuration
Pass Code Entry section. The default is 3510, but this is user
changeable.
Calibration Mode
The gauge remains in the calibration mode until restarted
manually or power is removed. Features not related to calibra-
tion are disabled.
The calibration may be performed in any of the available
engineering units as well as percent (PCT). Compound range
models are set for the same engineering units for pressure
and for vacuum.
For greatest calibration accuracy, use the UP and DOWN
buttons to select engineering units with highest number of
display counts.
Press and release the front button when the desired engineer-
ing units are displayed.
C E C OMP
Div. of
Calibration—continued
Sensor
Suggested units for calibration
3 PSI
3.000 PSI
5 PSI
5.000 PSI
15 PSI
775.7 MMHG (TORR)
30 PSI
69.20 FTH2O
60 PSI
60.00 PSI
100 PSI
7.031 KG/CM2
200 PSI
407.2 INHG
300 PSI
610.8 INHG
500 PSI
500.0 PSI
1000 PSI
70.31 KG/CM2
3000 PSI
6108 INHG
5000 PSI
5000 PSI
Any
100.00 PCT (percent)
The display will then indicate the currently applied pressure in
the engineering units selected for calibration.
UP and DOWN Button Operation
Each time one of the UP or DOWN buttons is pressed and
released quickly, a small change is made to the digitized pres-
sure signal. It may take more than one of these small changes
to result in a single digit change on the display.
To make larger changes, press and hold the appropriate UP or
DOWN button. After about one second, the display will begin
to change continuously. Release the button to stop. Then
make fine adjustments by pressing and quickly releasing the
appropriate button.
Gauge Reference Pressure Gauges
Enable/
Apply zero pressure by venting the gauge port to atmosphere.
Disable
The character display will alternate between ZERO and CAL.
Switch
Press the UP and DOWN buttons to obtain a zero indication on
the gauge display.
Apply full-scale pressure. The character display will alternate
between +SPAN and CAL.
Press the UP and DOWN buttons to match the gauge display to
the full-scale pressure reading on the calibrator.
Apply 50% full-scale pressure. The character display will alter-
nate between +MID and CAL.
Press the UP and DOWN buttons to match the gauge display to
the 50% of full-scale pressure on the calibrator.
Gauge Reference Vacuum Gauges
Apply zero pressure by venting the gauge port to atmosphere.
The character display will alternate between ZERO and CAL.
Press the UP and DOWN buttons to obtain a zero indication on
the gauge display.
Apply full-scale vacuum. The character display will alternate
between +SPAN and CAL.
Press the UP and DOWN buttons to match the gauge display to
the full-scale vacuum indication on the calibrator.
Apply 50% full-scale vacuum. The character display will alter-
nate between +MID and CAL.
Press the UP and DOWN buttons to match the gauge display
to the 50% of full-scale vacuum indication on the calibrator.
Absolute Reference Gauges
Apply full vacuum. The character display will alternate between
ZERO and CAL.
Press the UP and DOWN buttons until the display indicates
zero.
Apply full-scale pressure. The character display will alternate
between +SPAN and CAL.
Press the UP and DOWN buttons to match the gauge display to
the full-scale pressure reading on the calibrator.
Apply 50% of full-scale pressure. The lower display will alter-
nate between +MID and CAL.
Press the UP and DOWN buttons to match the gauge display to
the 50% of full-scale reading on the calibrator.
Compound and Bipolar Gauges
In addition to the steps described above for pressure gauges,
apply full-scale vacuum. The character display will alternate
between -SPAN and CAL.
Press the UP and DOWN buttons to match the gauge display to
the full-scale vacuum reading on the calibrator.
A
P
BSOLUTE
ROCESS
1220 American Way Libertyville, IL 60048
I
NSTRUMENTS
DPG2000B D4 and M0, M1 Series
Calibration—continued
For bipolar (±) and –30.00inHg/+15.00psig compound range
models only, apply 50% full-scale vacuum. The character
display will alternate between -MID and CAL.
Press the UP and DOWN buttons to match the gauge display to
the 50% of full-scale vacuum on the calibrator.
Save Calibration
Once the adjustments are complete, press and hold the front
button until the display indicates - - - - then release the button
to store the calibration parameters in non-volatile memory and
restart the gauge.
Verify the pressure indications at 0%, 25%, 50%, 75% and
100% of full scale.
Move the switch on the circuit board to the DISABLE position.
Replace the back cover, including the rubber gasket.
User Pass Code
User-defined pass code configuration allows changing of the
factory 3510 pass code to new value for configuration and
calibration.
Configuration must only be done in a non-hazardous area.
Remove the rear 6 Phillips screws and remove the rear cover.
Move the switch on the circuit board to the ENABLE position.
Located the internal UP and DOWN buttons on the circuit board.
View Or Change User Configuration Pass Code
With the unit off, press and hold the UP button, then press the
front button. Release all buttons when the display indicates
CFG.
View Or Change User Calibration Pass Code
With the unit off, press and hold the DOWN button, then press
the front button. Release all buttons when CAL is shown.
Enter Access Code 1220
Before the unit enters the view or change pass code mode,
the display initially indicates _ _ _ _ with the first underscore
blinking, and with CFGPC or CALPC on the lower display.
Note: The gauge will automatically revert to normal operation if
no buttons are operated for approximately 15 seconds.
To cancel and return to normal operation, press and release
the front button without entering any pass code characters.
Use the UP, DOWN, and front buttons to enter the 1220 pass
code.
Press and release the front button to proceed.
Note: If an incorrect access code was entered, the gauge will
return to the start of the access code entry sequence.
Once the access code has been entered correctly, the display
will indicate the existing user-defined pass code with either
CFGPC or CALPC on the character display.
1. Press the UP or DOWN button to select the first character of
the new pass code.
2. When the desired first character is displayed, press and
release the front button to move to the next character.
3. Repeat above until the entire pass code is complete.
4. To exit, press and hold the front button. Release the button
when the display indicates - - - - to restart the gauge.
5. Move the switch on the circuit board to the DISABLE posi-
tion.
6. Replace the back cover, including the rubber gasket.
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