Ametek JOFRA IPI Guide

Adjustment Manual
Industrial Pressure Calibrator
JOFRA IPI & IPI Mk.II

Supervisory Mode and Calibration Instructions
for IPI Industrial Pressure Indicator
Using the Supervisory Mode
Push the CONFIG button to access the user-settable functions on the
indicator. Each time the CONFIG button is pressed; the display
advances to the next function. Press CONFIG repeatedly until “FUnC
LOCK” is displayed.
Press ENTER when “FUnC LOCK” is displayed, 0PWRD will be displayed
on the indicator. The password to enter supervisory mode is 101, set
using the ▲ and ▼ keys. Holding a key continuously will cause the
display to advance more quickly for faster setting. The password is
factory set and cannot be changed.
1. Your IPI is shipped from the factory with all setting access
“unlocked” or available to be changed.
2. In supervisory mode each of the parameters can be locked or
unlocked using the ▲ and ▼ keys. Select LOC (lock) for those
parameters you do not want to be accessible, and UnLOC (unlock)
for those can be accessed.
3. In order, the functions that can be unlocked, locked or accessed
are:
● Zero function (enable/disable)
● Set pressure units (enable/disable)
● Auto shutdown adjustment (enable/disable)
● Damping settings (enable/disable)
● Sample rate setting (enable/disable)
● Tare setting (enable/disable)
● Custom engineering units (set scale factor)
4. Use the CONFIG key to scroll through the above choices, and the
▲ and ▼ keys to lock and unlock features. Press CONFIG to
continue scrolling through the parameters, pressing ENTER at any
point saves your settings and returns the indicator to normal
operation.

When a function is “locked, it cannot be accessed or changed from
its current state. To change a locked function, enter the supervisory
mode, and unlock the function. Once it is changed, you may enter
supervisory mode to lock access again.
5. Setting a custom engineering unit or scale: The last menu choice in
supervisory mode is SET FACTR. This allows you to set a
multiplier factor from 0.001 to 100, creating a custom scale. The set
factor will be multiplied by the psi measured, the result will be
displayed.
For example: 40 psi is the equivalent of 1000 lbs of product in a
tank. You want to display the product weight , using a 100 psi
range indicator. By setting a factor of 25, a 40 PSI pressure would
display as 1000 (40 x 25). The engineering unit displayed on the IPI
will be “Cust”.
IPI Calibration Procedure
Overview
Calibration adjustment of the IPI is performed electronically via internal
software with the case closed. There are no mechanical adjustments;
all calibration commands and adjustments are done via the keypad,
using the display to guide the user through the calibration process.
Eight 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 vacuum.
Note: This is an ambient temperature calibration, and should be
performed at an ambient temperature of 23º C ± 3º C (72 º F ± 5º F).
Calibration outside this temperature range will invalidate the
temperature compensation program in the IPI.

Calibration Interval
You should check performance of the IPI at the interval required by
your calibration program. We recommend adjustment when
measurement deviates by more than 75% of the specified accuracy, or
0.04%
Test Equipment
Verification and calibration of the IPI requires pressure and/or vacuum
standards able to produce and indicate pressures from vacuum to the
full-scale range of the unit under test. In order to maintain the specified
accuracy of the IPI, standards should have a TUR of 4:1 or better.
Connections
The IPI uses a 1/4” NPT male connection in the pressure input port.
Various adapters may or may not be needed to connect to the pressure
standard. Always make sure the hose, tubing, and fittings etc have a
rated working pressure at or above the pressure of the unit. Also it is
important that there be no leaks when performing calibration; use Teflon
tape where appropriate.
Manual Calibration
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 calibration mode correctly the
display should look as shown below. The pressure value displayed will
be the full-scale value of the indicator.
Procedure:
Screens shown in this manual represent the displays shown with a 500
psi indicator. The IPI will prompt the technician for the appropriate
pressure at each calibration point.
PSI
500.00
CAL MODE

Use the Pressure Standard to output 500.00 psi (100%). After the
output has stabilized, press the ENTER key to continue. As the unit
takes readings, the screen will show -------. When the readings are
complete the screen should look as shown in the illustration that follows.
Use the Pressure Standard to output 437.50 psi (87.5%). After the
output has stabilized, press the ENTER key to continue. As the unit
takes readings, the screen will show -------. When the readings are
complete the screen should look as shown below.
Use the Pressure Standard to output 375.00 psi (75%). After the output
has stabilized, press the ENTER key to continue. As the unit takes
readings, the screen will show -------. When the readings are complete
the screen should look as shown below.
PSI
437.50
CAL MODE
PSI
375.00
CAL MODE
PSI
312.50
CAL MODE

Use the Pressure Standard to output 312.50 psi (62.5%). After the
output has stabilized, press the ENTER key to continue. As the unit
takes readings, the screen will show -------. When the readings are
complete the screen should look as shown below.
Use the Pressure Standard to output 250.00 psi (50%). After the output
has stabilized, press the ENTER key to continue. As the unit takes
readings, the screen will show -------. When the readings are complete
the screen should look as shown below.
Use the Pressure Standard to output 187.50 psi (37.5%). After the
output has stabilized, press the ENTER key to continue. As the unit
takes readings, the screen will show -------. When the readings are
complete the screen should look as shown below.
PSI
250.00
CAL MODE
PSI
187.50
CAL MODE
PSI
125.00
CAL MODE

Use the Pressure Standard to output 125.00 psi (25%). After the output
has stabilized, press the ENTER key to continue. As the unit takes
readings, the screen will show -------. When the readings are complete
the screen should look as shown below.
Use the Pressure Standard to output 62.50 psi (12.5%). After the
output has stabilized, press the ENTER key to continue. As the unit
takes readings, the screen will show -------. When the readings are
complete the screen should look as shown below.
Use the Pressure Standard to output 0.00 psi. After the output has
stabilized, press the ENTER key to continue. As the unit takes
readings, the screen will show -------. When the readings are complete
the screen should look as shown below.
PSI
62.50
CAL MODE
PSI
0.00
CAL MODE
PSI
-12.00
CAL MODE

Use the Pressure Standard to output -12.00 psi. After the output has
stabilized, press the ENTER key to continue. As the unit takes
readings, the screen will show -------.When the readings are complete
the unit will reset and power up in normal mode.
Serial Calibration
Entering Calibration Mode
The terminal communications can be setup using terminal
communication software on a PC, such as Hyperterminal or PcPlus.
Connect the RS232 cable to stereo jack on the back of the IPI. The
other end of the cable should be connected to the terminal/PC serial
port. An adapter may be needed for terminals that use 25 pin 'D' serial
connectors.
The terminal settings need to be set as follows:
•Bits per second: 9600
•Data bits: 8
•Parity: None
•Stop bits: 1
•Flow control: none
•Local echo: on
To initiate the calibration mode use the terminal to send the
CAL_START command. The following will be displayed on the terminal.
Calibration is password protected
Enter Password:

The password is FLD_CAL. Enter the password correctly and the
following will be displayed on the terminal.
Calibration Menu
1: Calibrate Temperature
2: Set Sensor Parameters
3: Calibrate Pressure
4: Reset Temp Compensation
5: First point above ambient Temp Comp
6: Second point above ambient Temp Comp
7: First point below ambient Temp Comp
8: Second point below ambient Temp Comp
9: Exit and save Data
10: Exit WITHOUT saving Data
Enter Selection:

Procedure
After all connections have been made, type 3 {enter}. Use the
Pressure Standard to input –approximately 200,150,100,50,0,
and -12 psi as prompted. When the value is stable, type in the
actual value at the keyboard. The screen should look as shown
below.
After inputting –12 psi the main calibration menu will reappear.
Notes on Calibration Verification:
This procedure covers calibration only. When verifying a unit,
as a rule of thumb the unit should never exceed 50% of its spec.
For verification using the serial port use the VAL? command.
Calibration Menu
1: Calibrate Temperature
2: Set Sensor Parameters
3: Calibrate Pressure
4: Reset Temp Compensation
5: First point above ambient Temp Comp
6: Second point above ambient Temp Comp
7: First point below ambient Temp Comp
8: Second point below ambient Temp Comp
9: Exit and save Data
10: Exit WITHOUT saving Data
Input ~200.000000 psi, Enter the actual value when stable:
Input ~150.000000 psi, Enter the actual value when stable:
Input ~100.000000 psi, Enter the actual value when stable:
Input ~50.000000 psi, Enter the actual value when stable:
Input ~0.000000 psi, Enter the actual value when stable:
Input ~-12.000000 psi, Enter the actual value when stable: