Cal Mode - 3D Instruments Accu-Cal Platinum Instruction Booklet

ACCU-CAL PLATINUM CALIBRATION PROCEDURE
Overview
Verification and calibration of the Accu-Cal
Platinum (ACP) is not required on newly
supplied units, only when the accuracy is
suspect. Unit re-calibration requires pres-
sure and/or vacuum standards able to pro-
duce and indicate pressures from vacuum
to the full-scale range of the unit under
test. In order to maintain the specified
accuracy of the ACP, calibration standards
used to re-cal the ACP must have 4x better
accuracy than the ACP. A vacuum stan-
dard will be required for the calibration of
the -14.7-0-30 compound range.
Calibration adjustment of the ACP is per-
formed electronically via internal software
with the case closed. All calibration com-
mands and adjustments are done via the
keypad, using the display to prompt the
user through the calibration process.
Nine or ten calibration points are used in
the adjustment program, working from full
scale to zero at pressures equaling 100%,
87.5%, 75%, 62.5%, 50%, 37. 5%, 25%,
12.5%, and 0% of full scale plus a possible
vacuum point.
Note: This is an ambient temperature cali-
bration and should be performed at an
ambient temperature of 23 ºC ± 3 ºC (72
ºF ± 5 ºF). Calibration outside this temper-
ature range will invalidate the temperature
compensation program.
Calibration Interval
You should check performance of the
gauge at the interval required by your cali-
bration program. We recommend adjust-
ment when measurement deviates by
more than 75% of the specified accuracy.
Connections
The Accu-Cal Platinum has a 1/4" NPT
male pressure input port. Various adapters
may or may not be needed to connect to
the pressure standard. Always ensure the
hose, tubing, and fittings etc have a rated
working pressure at or above the pressure
of the unit.
Entering Calibration Mode
After you have made your connections,
turn the power on while holding the
CONFIG key. Use the arrow keys to enter
the password. The password is: 101. If you
have entered the calibration mode correct-
ly, the display should look as shown below.
The pressure value displayed will be the
full-scale value of the gauge. Refer to
important note on bottom of page 8.
Screens shown in this manual represent
the displays shown with a 500 psi gauge.
The Accu-Cal Platinum will prompt the
technician for the appropriate pressure at
each calibration point.
500.00

CAL MODE

Use the Pressure Standard to output
500.00 psi (100%). After the output has
stabilized, press the ENTER key to contin-
ue. As the unit takes readings, the screen
will show -------. When the readings are
complete, the screen should look as
shown below.
437.50
CAL MODE
Use the Pressure Standard to output
437.50 psi (87.5%). After the output has
stabilized, press the ENTER key to contin-
ue. As the unit takes readings, the screen
will show -------. When the readings are
complete, the screen should look as
shown below.
375.00
CAL MODE
Use the Pressure Standard to output
375.00 psi (75%). After the output has sta-
bilized, press the ENTER key to continue.
As the unit takes readings, the screen will
show -------. When the readings are done,
the screen should look as shown below.
PSI
PSI
PSI
KT-099
06/07
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