MODEL 320 PRESSURE CALIBRATOR & LOOP POWER SUPPLY USER’S GUIDE

This gives the name of the owner of the calibrator. The preceding display shows the default setting as the calibrator is shipped. The name can be ch

BATTERY CHECK The Bat Ck key may be pressed at any time after completion of the calibrator startup routine to diplay the current battte

The LPS battery voltage should be between 10.6 and 9.2 volts, indicating a full charge. When the voltage falls below 8.8 volts, the LPS will t

pressure). A barometric standard of at least .025% accuracy should be used to determine atmospheric pressure. When entering this

ENG UNIT KEY The Eng Unit key allows the user to select any of the 8 standard or 1 user definable engineering units to be activated for the p

than the instantaneous values. This feature is useful when measuring pressures that are pulsating or otherwise unstable. The Model 320 makes 2

MA/V KEY The mA/V key will alternate the electrical measurement being displayed between milliamps and volts. % KEY Pressing the % key wi

Once the proper zero and full scale values have been entered, the operator presses the % key to activate the percent function. The zero and spa

detect mode that is available through the setup menus. When trip detect is active, the Model 320 calibrator will monitor the electrical me

CLEAR KEY The Clear key allows the operator to re-enter an incorrect numeric entry. When the Model 320 calibrator is expecting a

Next to each menu in Setup is a number. Pressing that number on the keypad allows the operator to configure that specific item. 1 = UsrEng (User D

After the conversion value is entered, the name for the new units can be entered. The name consists of 1 to 5 alphanumeric characters that are selec

The name shown in the lower left is the last name that has been entered. To enter Atmos as the name, you would enter the following values (press

Press either 1 or 2 using the numeric keys to turn battery save on or off. 3 = %func (Percent Function) The percent function allows the o

Note that the input will be a pressure value for P/I or P/P transmitters, and will be a voltage or milliamp value for an I/P or E/P transmitt

Select I/P for transmitters that accept a current or voltage as an input and produce a pressure as an output. Select P/I for tr

Select “2” if the pressure input to the pneumatic transmitter is being measured on the right port of the Model 320. After the percent fun

identifying information into the calibrator’s nonvolatile memory. The owner’s name cannot be changed unless the operator knows the u

value of the desired character. Appendix A lists the values for each character. To advance to the next position without changing the existing charac

Function to calibrate Required ref source Volts In 10VDC ± .01% mA In 20mA ± .01% pressure; zero, span pressure at 0%, 25%, li

TABLE OF CONTENTS INTRODUCTION Page General Description………...…………………….4 Model 320 Calibrator…………………..…………4 Loop Power Supply (LPS)………………..……

To place the Model 320 into the calibrate mode, press 6 (user cal) while in set up mode, screen number 2. The unit will prompt for the acces

Select – proceed to the next calibration step. Clr – If depressed while a user calibration step is active, ????? will be displayed prompting

4. If the reading is within the required limits, press Select to progress to the next step. After the last calibration step, the user is prompted to

Left pressure zero Vent for gauge, and gauge vacuum, 0.003 PSI or less for absolute Left pressure Span FS – range dependent Lef

exit the calibration mode. To calibrate electrical or pressure functions proceed as follows. 3. Apply a 10 volt signal to the volts

next calibration step.. Repeat this process for all points to be calibrated. At the end of the pressure calibration sequence you wil

INPUT FUNCTIONS VOLTS The Model 320 measures voltage at the volts terminals at the lower left corner of the keypad area. The negative t

at the lower left corner of the keypad area. The negative terminal is common to volts and milliamps measurements. To measure cur

The Model 320 does not employ any overpressure relief bypass. The maximum overpressure for the various sensors is given in the specific

turn on. Open the loop and power down occurs. This allows for maximum battery life by not allowing the unit to be left in the on mode accidentally

Calibration...26 Trip Detect...33 Input F

The LPS battery voltage should be between 10.6 and 9.2 volts. When the voltage falls below 8.8 volts, the LPS will automatically turn itself of

4. Turn on the Model 320 and select mA. 5. Select the desired engineering units by pressing the Eng Unit button. 6. Press the Zero button to

Transmitter Calibration Using Pressure Pump 40

USING THE MODEL 320 PRESSURE CALIBRATOR AND LPS WITH A HAND PUMP 1. Safely take the instrument to be tested out of service, equilize it,

Transmitter Calibration Using Loop Power Supply (LPS) 42

Pressure Switch Calibration Using Trip Detect 43

Calibration of a Pneumatic Flow Transmitter 44

CALIBRATION USING % FUNCTION You can use the % Function to calibrate a P/I pressure transmitter. For this example we will calibrate a pressur

This shows that the pressure input to the transmitter is at +0.00% of scale, and the milliamp output is 1.25% low. If the % of scale reading

APPENDIX A Entering Alphanumeric Data The user is required to enter alphanumeric data when changing the owner’s name and configuring user defi

Appendix A. Entering Alphanumeric Data...47 B. Pressure Conversion Factors...48 Specifications

APPENDIX B Pressure Conversion Factors The factors used by the Model 320 Calibrator to convert from PSI to other enineering units aare liste

SPECIFICATIONS MODEL 320 PRESSURE CALIBRATOR AVAILABLE RANGES: Gauge Vacuum Absolute Differential PSIG PSIG PSIA PSID*** 0-0.39** 0 to –1** 0

ACCURACY: * PRESSURE: ±(%Rdg, ±%FS, ±1 LSD) PSI Range %Rdg %FS PSI Res. 0.39 0.07 0.03 0.0001 1 0.07 0.03 0.0001 5 0.05 0.02 0.00

ELECTRICAL: ±(%FS, ±1 LSD) Standard Units: Range Units %FS Res. 0-10 V 0.025 0.001 0-30 V 0.1 0.01 0-20 mA 0.025 0.001

Storage: -30 ºC to 50ºC, with batteries; -30 ºC to 70 ºC without batteries. OVERPRESSURE: Operating, without damage or calibration shift: 0-100 psi

WARRANTY Beta Calibrators devices are warranted to be free from all latent defects in material and workmanship under normal use and service. Sh

SERVICE INFORMATION Return for calibration, recertification or repair. It is recommended that each calibrator be recalibrated and/or recertified on

Website: www.betacalibrators.com Email: [email protected] When calling for a form, please provide your Purchase Order Number and an explana

INTRODUCTION: GENERAL DESCRIPTON The Model 320 pressure calibrator is a compact, versatile, functionally styled calibrator. The unit

2309 Springlake Road, Suite 600 Farmers Branch, TX 75234-5875 USA Copyright 2002 Beta Calibrators

desired. The LPS is stored in a pouch under the Model 320 calibrator for easy access. BATTERY CHARGING Units are shipped with the in

OPERATION: The Model 320 calibrator is user friendly and menu driven. A first time user can normally start operating the unit with few

auto calibration does not in any way affect the primary calibration done at the factory or at a field metrology lab using available software and suita