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:

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