Ashcroft ATE-100 User Manual

ATE-100 HAND HELD CALIBRATOR

OPERATING

MANUAL

REVISION 4.6 3/2004

I&M002-10037-11/00 (AHHC-MAN)

Thank you for your purchase. Please feel free to contact us if we may be of assistance in any way.

Should you require service for this instrument or wish to take advantage of our expert factory recalibration services, please contact the factory for return information:

Ashcroft Inc.

250 E. Main Street

Stratford, CT 06614-5145

Tel: [phone]

Fax: [phone]

For the latest product information, please visit our website at: www.ahscroft.com

	Table of Contents
Section	Description	Page
1.0	Introduction ..................................................................................................................................	4
1.3	Base Unit Overview.........................................................................................................	4
1.4	Quick Select Module Overview ......................................................................................	4
1.4.1	The GQS-1 Quick Select Pressure Module.................................................................	5
1.4.2	The GQS-2 Quick Select Pressure Module ................................................................	5
1.4.3	The GQS-RT1 Quick Select RTD Temperature Interface Module.............................	5
1.4.4	The GQS-TC1 Quick Select Thermocouple Interface Module...................................	6
2.0	Unpacking .....................................................................................................................................	6
2.1	Unpacking Product Upon Receipt...................................................................................	6
2.2	Product Storage................................................................................................................	6
2.3	Product Cleaning .............................................................................................................	6
3.0	System Start-Up General Instructions .......................................................................................	6
3.1	Battery Installation...........................................................................................................	6
3.2	Installation of Quick Select Modules...............................................................................	7
3.3	Starting Up HHC System.................................................................................................	7
3.4	Optional System Start Up Procedures..............................................................................	8
3.4.1	Auto Off – Battery Save Function...............................................................................	8
3.4.2	Set Up for Battery Charge Level Indication................................................................	9
3.4.3	Low Battery Icon.........................................................................................................	10
3.4.4	Programming Date and Time Information..................................................................	10
3.4.5	Input of Owner/Operator Information.........................................................................	11
3.5	Removing Quick Select Modules....................................................................................	12
4.0	Key Function Overview ...............................................................................................................	12
5.0	Port Select Function ....................................................................................................................	13
6.0	Zero Function ...............................................................................................................................	14
6.1	Zeroing One of Two Installed Quick Select Pressure Module.........................................	14
7.0	Displaying Current & Voltage Measurements ............................................................................	14
8.0	Engineering Unit Selection .........................................................................................................	15
8.1	Selecting a Factory Programmed Engineering Unit........................................................	15
8.2	Setting Up a Custom (User Defined) Engineering Unit...................................................	15
8.3	Using a Custom (User Defined) Engineering Unit..........................................................	16
8.4	Display of Two Different Engineering Units, for Two Installed Modules.......................	17
8.5	Temperature Selection for H2O Conversion Factor.........................................................	18
9.0	Tare Function ...............................................................................................................................	19
10.0	Hold Function ...............................................................................................................................	19
10.1	Using the Hold Function..................................................................................................	19
11.0	Minimum and Maximum Value Tracking .....................................................................................	20

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Section	Description	Page
12.0	Damping Function .......................................................................................................................	20
12.1	Set Up of Damping Function...........................................................................................	20
12.2	Activating or Discontinuing Damping.............................................................................	21
13.0	Percent Function ..........................................................................................................................	21
13.1	Set Up of Percent Function..............................................................................................	21
13.2	Use of Percent Function...................................................................................................	22
14.0	Flow Velocity and Flow Volume Measurement Background ....................................................	23
14.1	Set Up for Flow Velocity & Volume Measurement..........................................................	23
14.2	Flow Velocity Measurement.............................................................................................	23
14.3	Engineering Unit Selection for Flow Velocity.................................................................	24
14.4	Flow Volume Measurement.............................................................................................	24
14.5	Engineering Unit Selection for Flow Volume..................................................................	25
14.6	Simultaneous Display of Two Flow Measurements in Independent Engineering Units..	25
14.7	Simultaneous Display of Flow (Velocity or Volume) with a Pressure Measurement......	26
14.8	Simultaneous Display of Flow (Velocity or Volume) with a Temperature Measurement.	27
14.9	Simultaneous Display of Flow Volume and Flow Velocity..............................................	27
14.10	Simultaneous Display of Flow (Velocity or Volume) and
	An Electrical Output Measurement.............................................................................	28
15.0	Leak Detection Function .............................................................................................................	29
15.1	Leak Rate Function Set Up..............................................................................................	29
15.2	Pressure Decay Function Set Up......................................................................................	30
15.3	Sensor Selection for Performing Leak Rate or Pressure Decay Tests.............................	30
15.4	Performing Leak Rate or Pressure Decay Tests...............................................................	30
16.0	Temperature Measurement Using RTD Probes .........................................................................
16.1	Setting Up the Calibrator for Temperature Measurement with an RTD Probe................	31
16.2	Calibrating and Programming of the RTD Interface and Probe.......................................	33
17.0	Temperature Measurement with Thermocouple Detector ........................................................	33
17.1	Setting Up Calibrator for Use with Thermocouple Detector...........................................	34
18.0	Pressure and Temperature Switch Testing ................................................................................	35
18.1	Setting Up for Pressure and Temperature Switch Testing................................................	35
18.2	Trip Point Testing.............................................................................................................	35
18.3	Deadband Testing.............................................................................................................	36
19.0	RS232 Interface ............................................................................................................................	37
19.1	Configuring RS232 Interface for Use With Dumb Terminal...........................................	37
19.2	RS232 Configuration Options..........................................................................................	37
19.2.1	RS232 – ISO1745 Mode Functional Overview..........................................................	37
19.2.2	RS232 – Journal Mode Functional Overview.............................................................	37
19.2.3	RS232 – Inquiry Mode Functional Overview.............................................................	38
19.3	RS232 Set Up for Journal Mode Operation.....................................................................	38
19.4	RS232 Set Up for Inquiry Mode Operation.....................................................................	39
20.0	Status .....................................................................................................................................	41
20.1	Reviewing Instrument Status...........................................................................................	41
20.2	Battery Check Function...................................................................................................	41
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Section	Description	Page
21.0	Dual Module Functions ...............................................................................................................	42
21.1	Accuracy of Dual Module Measurements.......................................................................	42
21.2	Setting Up Dual Module Differential Pressure Measurement.........................................	42
21.3	Setting Up a Dual Module Summation Pressure Measurement.......................................	44
22.0	Data Logging Function (Optional) .............................................................................................	45
22.1	Sequential Data Logging Function (Optional).................................................................	45
22.2	Setting Up the Data Logging Function (Optional)..........................................................	45
22.3	Labeling Function – Standard Data Logging Mode........................................................	46
22.4	Automatic Data Logging – Standard Data Logging Mode..............................................	46
22.5	Manual Data Logging – Standard Data Logging Mode...................................................	47
22.6	Review of Stored Data – On Instrument Display –
	Standard Data Logging Mode.....................................................................................	48
22.7	Erasing of Selected Stored Data – Standard Data Logging Mode...................................	49
22.8	Erasing All Stored Data – Standard Data Logging Mode................................................	49
23.0	Certification Generation Enhanced Data Logging Mode .......................................................	50
23.1	Set Up and Use of Certification Generation Data Logging Mode ................................	50

24.0HHC System Set Up for Uploading Stored Data

	Into an IBM Compatible PC .....................................................................................................	55
24.1	Installing and Operating Upload Software......................................................................	56
24.2	Battery Back Up Replacement.........................................................................................	56
25.0	Event Timer Function .................................................................................................................	56
25.1	Event Timer Set Up..........................................................................................................	57
25.2	Data Logging Set Up for Operation with the Event Timer..............................................	57
26.0	Alarm Function – Overview (Optional Feature) .......................................................................	58
26.1	Alarm Set Up...................................................................................................................	59
27.0	Recertification of the Calibrator ...............................................................................................	60
27.1	Calibration/Recertification Overview..............................................................................	60
27.2	Required Equipment........................................................................................................	60
27.3	As Received Readings of the Base Unit Electronics.......................................................	60
27.4	Adjustment/Calibration Base Unit Electronics................................................................	62
27.5	Recertification of Quick Select Pressure Modules...........................................................	64

— Appendices —

Appendix A – Pressure Conversion Factors ......................................................................................................	67
Appendix B – ASCII Character Set .....................................................................................................................	69
Appendix C – Product Specifications .................................................................................................................	72
Table I ..................................................................................................................................................................	74
Table II ..................................................................................................................................................................	74
Appendix D – RTD Probe Connector ..................................................................................................................	75
Appendix E – Certification of the TC1 Thermocouple Interface Module .........................................................	76
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Section 1.0

Introduction

Congratulations! Your purchase of the Hand Held Calibrator (HHC) calibration system equips you to perform a wide variety of pressure and temperature measurements. The general pressure and temperature measurement capabilities of the HHC are supplemented by application specific firmware as well as the availability of optional data logging capability.

The HHC is a complete pressure calibration system providing: interchangeable pressure ranges, simultaneous measurement and display of two pressure ranges, measurement and display of current and voltage. The HHC also provides the ability to perform high accuracy temperature measurement. Conversion between temperature and pressure measurement can be done in a matter of seconds and requires no tools.

A standard HHC system consists of a base unit that acts as a host for one or two Quick Select modules. The Quick Select pressure modules are interchangeable and are available in a wide variety of ranges from 0.25 inches of water to 10000 psi. A brief description of the main components of an HHC system follows. In addition, Quick Select modules are available to allow the base unit to work in conjunction with most standard RTD temperature probes and thermocouple temperature detectors.

Section 3 and its various subsections include all the information needed to begin using the HHC system for basic pressure and temperature measurement. Higher level functions are detailed in later sections of this manual. It is strongly recommended that the pertinent sections of this manual be reviewed prior to using the HHC system for higher level and application specific measurement and test activities.

Important: Failure to follow the instructions provided in this manual may result in personal injury and/or damage to the instrument, accessories, products under test or other equipment.

Section 1.3 Base Unit Overview HHC

The base unit functions as the host for the Quick Select pressure and temperature modules designated in this manual by the “GQS” prefix. Each base unit includes a keypad, microprocessor based electronics and a two line LCD display. The base unit displays the measure-

ment data transmitted from the Quick Select module(s). Measurement outputs from two installed Quick Select modules can be simultaneously displayed. Quick Select modules for the measurement of either pressure or temperature can be plugged into either of the

2 module “bays” in the base unit. Pressure engineering

units can be independently selected from the library of twelve factory programmed or one operator designated engineering unit. Temperature measurement data can be displayed in degrees Celsius, Fahrenheit, Kelvin or Rankine. In addition, when used with the GQS-RT1 Quick Select module for temperature measurement with an RTD temperature probe, the calibrator system can display the RTD measurement in ohms. The GQS-TC1 thermocouple interface module allows measurement of mV inputs from –10 to +100 mV.

In addition to displaying two pressure measurements simultaneously the operator can elect to display pressure and temperature or the measured value from either of the two installed Quick Select modules as well as either a voltage or mA measurement. This allows for the easy calibration and test of pressure and temperature transducers, transmitters and switches.

The base unit includes a wide variety of general and application specific measurement capabilities. These capabilities allow the HHC measurement and calibration system to be used for basic pressure and temperature measurement as well as application specific pressure measurement activities. Basic pressure and temperature measurement capabilities include; max/min recall, operator programmable tare values, display hold, operator programmable damping and user selected engineering units. Application specific capabilities include; flow velocity measurement, flow volume mea-surement, leak detection, leak rate quantification and switch testing. Optional data logging, time delayed data logging and programmable alarms are also available.

Section 1.4 Quick Select Modules

Overview

The Quick Select pressure module is a calibrated pressure measurement device. Quick Select pressure module units are available in a wide variety of pressure measurement ranges. The Quick Select RTD and therm-ocouple interface modules allow the HHC base unit to provide precision temperature measurement data using standard RTD (Resistance Temperature Detector) or thermocouple detectors. The GQS-RT1 module allows the HHC to function with most common platinum, nickel and copper RTDs, while the GQS-TC1 supports most common thermocouples.

The Quick Select module communicates with the base unit via a 10 pin connector. Quick Select pressure modules slide into the base unit automatically aligning the female 10 pin connector on the Quick Select pressure module with the male 10 pin connector in the base unit.

All calibration data is stored in Electrically Erasable Programmable Read Only Memory (EEPROM) resident

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in the Quick Select module. As such, any Quick Select module can be used in any base unit and the measurement system will provide measurement accuracy in conformance with the published specification.

Section 1.4.1 The GQS-1 Quick Select

Pressure Module

GQS-1 Quick Select pressure modules provide specialized low pressure measurement capabilities. GQS-1 Quick Select pressure modules incorporate a micromachined silicon variable capacitance sensor.

Inside the sensor there is a micro-machined silicon diaphragm. This diaphragm is between two non-moving plates on which metal has been sputtered. The air between the diaphragm and the non-moving plates acts as an insulator.

As pressure or vacuum is applied to the sensor, the diaphragm moves changing the distance between the diaphragm and the fixed plates. This change in distance changes the capacitance of the sensor. It is this variable capacitance that is measured and correlated to pressure or vacuum during the calibration process.

The sensor is connected to an Application Specific Integrated Circuit (ASIC). This ASIC generates a linear signal ramp and applies this signal to the top plate of the sensor while an equal and opposite signal is applied to the bottom plate.

When the measured pressure is balanced, for example, when both ports are opened to atmosphere, the distance between the diaphragm and both of the fixed plates is the same. When this is the case, the signal to the top plate

is capacitively coupled to the equal and opposite signal applied to the bottom plate. As a result, no signal current will flow through the center plate (diaphragm). When the diaphragm is moved off center by the application of pressure or vacuum, the excess current flows through the center plate to an input differentiator in the ASIC. The differentiator translates the frequency of the sensor output into a voltage which is scaled over the full scale range of the instrument.

GQS-1 modules are available in ranges from 0.25 inches of water through 200 inches of water. These modules can be configured to provide differential/gauge or compound pressure measurement capabilities. They

are designed for use on clean, dry, noncorrosive and nonconductive gases. A complete listing of the available GQS-1 modules is provided in Appendix C.

Section 1.4.2 The GQS-2 Quick Select

Pressure Module

The GQS-2 Quick Select pressure module incorporates a

micro-machined piezoresistive strain gauge sensor. This technology takes advantage of the fact that, when put under stress, (as with the flexing of a diaphragm under pressure or vacuum) the resistive properties of a piece of silicon will change. In the manufacturing process resistors are deposited in a silicon substrate. The resistors are typically configured in a wheatstone bridge orientation. When positioned in this fashion, the output will be near zero when no pressure (stress) is applied and will increase in a near linear fashion with the application of pressure or vacuum. The reverse side of the substrate is etched to provide the required diaphragm thickness for the given pressure range.

When power is applied to the sensor the level of resistance across the wheatstone bridge will change in proportion to the level of pressure applied. The output from the sensor is extremely repeatable and has minimal hysteresis due to the fact that the sensor substrate is silicon. The sensor output is then amplified by circuitry within the Quick Select pressure module. The amplified output is then calibrated over the operating range of the module. Calibration coefficients for the module are stored in Electrically Erasable Programmable Read Only Memory (EEPROM) within the Quick Select pressure module.

GQS-2 modules are available in ranges from 5 through 10,000 psi. These modules can be configured to provide gauge, compound or absolute pressure measurement, as well as vacuum measurement capabilities. GQS-2 modules in range of 5 psi are designed for use on clean,

dry, noncorrosive and nonconductive gases. 316 stainless steel sensor isolation is provided for ranges from 0/10 through 0/10,000 psi. A complete listing of the available GQS-2 modules is provided in Appendix C.

Section 1.4.3 The GQS-RT Quick Select

RTD Interface Module

The GQS-RT1 allows the HHC base unit, when used with RTD temperature probes, to provide precision temperature measurement data. The GQS-RT1 plugs directly into the Quick Select interface module bay in the base unit. Any standard RTD probe with a Switchcraft TA4M can be plugged into the Switchcraft TA4F connector on the module. The GQS-RT1 module comes factory programmed with the curves for Pt 100 (385 & 392), Cu 10 and Ni 120 RTD probes. It supports RTDs with outputs in the range of 0/400 ohms. The GQS-RT2 is supplied factory programmed to support the Pt1000 ( 385 & 392) RTD. This interface module will support

RTDs through an output up to 4000 ohms. The GQS-RT module can be programmed with coefficients for other RTD probes of interest and specific characteristics of a probe already included in the on-board library can be

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programmed into the GQS-RT unit to provide enhanced accuracy. Each GQS-RT interface module can accommodate up to 8 different programmed RTD calibration curves. Programming of the RT module is accomplished via an optional software package and any PC compatible computer with an available standard serial communication port. See Appendix E page 75 for probe connector pin out information.

Section 1.4.4 The GQS-TC1 Quick Select

Thermocouple Interface Module

The GQS-TC1 allows the HHC base unit, when used with a thermocouple interface module, to perform temperature measurement. The GQS-TC1 plugs directly into the Quick Select module bay in the base unit. The thermocouple is then attactched to the GQS-TC1 module via a male “miniature thermocouple connector.”

Section 2.0 Unpacking & General Care

General instructions for unpacking and calibrator care follow.

Section 2.1 Unpacking Product Upon Receipt

Prior to removing the HHC from the packaging material inspect all cartons for shipping damage. Document any damage evident in the event that a damage claim must be made against the shipper. After inspection, remove the base unit, module(s), manual and any accessories purchased from the packaging material. Retain the packaging for use in returning the HHC to the factory for future recertification or repair.

Section 2.2 Product Storage

The product should be stored in an area that is maintained in the temperature range indicated in the storage temperature in the product specification. The storage temperature limits are -4 to + 158 degrees Fahrenheit. Storage of product in environments that will exceed these temperature limits results in significant risk of product damage. It is recommended that the product not be left in closed cars or truck cabs as temperature damage can easily occur due to the “greenhouse effect” of closed vehicles or extreme cold temperatures that can result from winter conditions.

Section 2.3 Product Cleaning

The enclosure of the calibrator is not watertight. As such, care should be taken during cleaning to assure liquid does not penetrate the enclosure for the base unit or Quick Select modules. Cleaning of the product should be done with a cloth moistened with a warm, mild detergent mixture.

Section 3.0 System Start-Up General

Instructions

The HHC can perform a wide variety of simple and complex temperature and pressure based measurement, test and calibration operations. Due to the menu driven set up procedures the system can be quickly and easily configured for most any of its measurement functions. By following the steps in this section you can be ready to use your HHC to perform basic pressure and temperature measurement functions in a matter of minutes.

Section 3.1 Battery Installation

Step 1 To gain access to the battery compartment, remove the bottom end of the strap assembly by detaching the Velcro connection and pulling the bottom end of the strap from the retaining pin in the bottom of the case of the base unit.

Step 2 Open the battery compartment by sliding the battery enclosure cover out of the compartment opening. To do this press down on the circular, ribbed indentation on the battery cover while pushing the enclosure cover outward with pressure on the two standoffs located near the pin used to retain the strap on the base unit.

Step 3 Note the polarity information for installation of the two 9 volt alkaline batteries as outlined on the inside of the battery enclosure.

Step 4 Locate the two 9 volt batteries and the foam retaining spacer provided in a small plastic bag. Install these batteries as shown on the diagram in the battery enclosure. The HHC will operate for approximately 30 hours on the two 9 Vdc batteries. Alkaline batteries are recommended for use in the HHC system.

Step 5 Insert the retaining spacer between the two 9 volt batteries. This will insure that the batteries will not disconnect or be shaken loose during normal operation.

Step 6 Replace battery compartment cover by sliding cover back into position until it locks in place.

Step 7 Replace strap by threading strap through the

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opening, starting closest to the battery compartment and reattaching Velcro. The strap may be adjusted in this fashion to provide for proper strap length to accommodate any hand size.

Section 3.2 Installation of Quick Select Module

in a Vacant Module Bay

Caution: Quick Select modules should be installed with the power off on the base unit. Failure to turn the base unit off prior to changing pressure measurement modules could damage the instrument or module electronics or “lock up” microprocessor operation. If power is inadvertently left on and the base unit locks up (looses communication) after changing Quick Select modules, simply power down the unit and restart.

Refer to Section 3.5 for the procedure to remove a Quick Select module.

To insert a Quick Select module follow the process below.

Step 1 Make certain the power is off on the base unit.

Step 2 Hold the base unit, in one hand, with the keypad side down.

Step 3 Holding the Quick Select module to be installed in the other hand, align the module with the locking tab up, with the module bay on the base unit.

Step 4 Slide the Quick Select module into the base unit until the retaining/release tab pops into the square cutout in the module bay of the base unit. This will lock the Quick Select module into the base unit.

Step 5 Installation of the Quick Select module is now complete. If an GQS-RT1 or GQS-TC1 interface module is to be used plug the appropriate temperature detector into the connector on the module. To set up the HHC and temperature module combination proceed to section 16 for RTDs or section 17 for thermcouple detectors

Important Note:

If only one module is to be used, install the Quick Select System Protection module provided. Follow the same procedure to install the system protection module as that used for a standard pressure measurement module. Both module bays of the

base unit should contain a Quick Select module to protect from dirt or other debris getting into the base unit assembly. If only one Quick Select pressure module is needed install the System

Protection Module (part number GQS-XS) supplied with your unit at the time of shipment when using the HHC system.

Section 3.3 Starting-Up the HHC System

After the desired Quick Select pressure module(s) or Quick Select temperature measurement interface module and probe has been installed the HHC can be started up as follows:

Turn the system power on by pressing the on/off key on the instrument’s key pad.

ON

OFF

During the start up process the HHC will display the following information:

First Screen

firmware

version xx.xx

where xx.xx is a numerical value representing the firmware revision level installed in the base unit. The firmware version is updated/changed as enhancements are added to the HHC.

Second Screen

Left Mod: Std or enh temperature performance

Third Screen

Range

xx and engineering unit

where:

xx = the range of the installed module

ngineering unit is the default engineering unit for the module installed in the left bay

Fourth Screen

Right Mod: Std or enh temperature performance

Fifth Screen

Range

xx and engineering unit

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where:

xx = the range of the installed module engineering unit is the default engineering unit for the module installed in the left bay

Note: GQS-2 pressure measurement modules are available with a standard calibration or an optional enhanced temperature performance calibration. Modules calibrated to provide enhanced temperature performance will provide the rated accuracy, without any additional temperature error over an operating temperature range of 20-120 degrees Fahrenheit. These modules will display:

enh

temperature performance

when powered up.

The range indication is provided in the primary engineering unit for each installed Quick Select module. Upon initial power up an HHC used with an GQS-RT1 temperature module and probe will default to displaying the ohms (resistance value) for the probe. Once set up this combination will default to the previously used temperature measurement unit, such as Celsius, Fahrenheit, Kelvin or Rankine. The primary engineering unit for a given Quick Select pressure module, along with the measurement range, is included on the module label. The information on the left side of the display corresponds with the Quick Select module installed in the left module bay and information on right side of the display corresponds with the Quick Select module installed in the right module bay. If only one module is installed the corresponding side of the display will indicate “no module” on power up.

After the third screen the HHC will commence providing pressure measurement data. The format for display of the measurement data is as follows:

Eng Unit Eng Unit

(primary engineering unit)

+xx.xxx +xx.xxx

(measured value with sign)

When only one module is installed, the side of the display corresponding to the side of the base unit that does not have a module will display “- - - - -”

If necessary, the HHC, used with a Quick Select pressure module, may be zeroed by pressing the Zero key prior to beginning measurement activities. Additional details on zeroing the HHC system are provided in Section 6.0 of this manual.

The HHC is now ready for basic pressure or temperature measurement. Simply connect the pressure port(s) of the

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Quick Select pressure module(s) to be used to the pressure source to be measured. If a gauge pressure measurement is to be made using a differential Quick Select pressure module be sure to connect the pressure to be measured to the high pressure port on the Quick Select pressure module. For temperature measurement, connect the RTD probe to be used to the Switchcraft connec-

tor on the interface module and proceed to Section 16 and 17 for instructions on setting up the calibrator for temperature measurement.

Section 3.4 Optional System Start Up

Procedures

There are additional set up operations that can be performed to increase the overall capabilities of the HHC system; these include:

1 – Auto off function to protect from inadvertently leaving the HHC system on.

2 – Setting up battery level indication so that an estimate of the remaining battery life can be viewed at the push of a button.

3 – Programming the current date and time for use in date stamping data logged pressure values and starting delayed data logging activities on HHC systems with the optional data logging capability. Current date and time information is only maintained in units with the data logging option

4- Programming owner/operator information for display on the HHC to facilitate tracking of in-house instrumentation.

The following subsections provide information on the above listed start up procedures.

Section 3.4.1 Auto OffBattery Save Function

(BatFunc)

The HHC can be set up to automatically turn itself off if no keypad activity is detected for a 10 minute time period. This capability will protect the two 9 volt batteries from being depleted if the HHC is left on inadvertently.

The following procedure is used to activate or disable the battery save function.

Step 1 With the HHC on and reading pressure press the SET UP key.

SET

UP

Step 2 Using the arrow keys select the battery function submenu (designated BatFunc in the set up menu). When selected, the text “BatFunc” will flash on the display.

BatFunc PerCent

UserEng H2Oref

Step 3 With “BatFunc” flashing press the enter key.

ENT

Step 4 Using the up/down arrow keys to select Auto Shut off. When selected the text will flash.

Auto shut off CfgBattIndicator

Step 5 With the words “Auto shut off” flashing press enter to activate the battery save function.

ENT

The PTE will respond by displaying the following:

Auto Shut off Disable Enable

If Enable is selected the HHC will automatically turn off if there is no keypad activity detected for a period of 10 minutes. If Disable is selected the HHC will remain on continuously until the battery voltage is no longer sufficient to power the system. The battery save mode selected is stored in Electrically Erasable Programmable Read Only Memory (EEPROM). As such it does not require reprogramming on power up.

Note: An optional AC adapter is available for long term continuous measurement activities.

Section 3.4.2 Set Up for Battery Charge Level

Indication

If this function is not set up pressing the BAT CK key will provide a measurement of the remaining voltage of the installed batteries.

If the battery check function is set up, the HHC can provide an estimate of the remaining battery life. This estimate is expressed as a percentage of the expected 30 hour life of newly installed alkaline batteries. Use of non-alkaline, lithium or rechargeable batteries will render the life expectancy estimate inaccurate. This function should be set up only when new batteries are installed.

If this function is not set up pressing the BATCK key will provide the measured remaining voltage of the installed batteries.

To have the capability to check the estimated remaining battery life follow the steps below.

Step 1 Press the ON/OFF key on the keypad to turn the power on to the base unit.

ON

OFF

Step 2 With the HHC on and reading pressure press the battery check key, designated BAT CK.

SET

UP

Step 3 Using the arrow keys select the battery save function (designated BatFunc in the set up menu). When selected, the text “BatFunc” will flash on the display.

BatFunc PerCent

UserEng H2Oref

Step 4 With the “BatFunc” text flashing press the enter key.

ENT

Step 5 Using the up/down arrow keys to select CfgBattIndicator to set battery level. When selected the text will flash.

Auto shut off CfgBattIndicator

In response the HHC will display:

Battery Indicator Disable Enable

Step 6 To Enable the battery level indictor use the arrow keys to select the text Enable

Step 7 With the text Enable flashing, press the enter key.

ENT

The HHC will respond by displaying:

Set BattCapacity XXXXXX

where:

XXXXXXXXXXXXXXXXX is a bar graph representation of the remaining battery life and +X.XXV represents the voltage level of the installed batteries.

Step 8 After installation of new batteries use the right pointing arrow key to index the bar graph to 100%.

>

Step 9 After the bar graph has been refreshed press the enter key.

ENT

Note: The bar graph and the estimate of the percent battery life remaining will now be displayed along with the

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battery voltage level when the BATCHK key is pressed.

Section 3.4.3 Low Battery Icon

The HHC provides advanced warning of a low battery condition. The icon, which looks like a miniature battery will appear and flash in the center of the top line of the display when the measured battery voltage drops to 5.7 Vdc. The calibrator will continue to function properly with the low battery icon flashing. To ensure uninterrupted measurement capability it is recommended that the batteries be replaced as soon as possible after the low battery icon appears. When the measured voltage drops to 5.5 Vdc, the low battery icon will flash on the display and the calibrator will turn itself off after 15 seconds. If the measured voltage drops to 5.4 Vdc the calibrator will not allow power up.

Summary of low battery warnings:

5.7 Vdc:

Low battery icon appears

5.5 Vdc: Low battery icon remains on display, unit powers down after 15 seconds.

5.4 Vdc: Power up not allowed

It is estimated that the user will have between 45 and 60 minutes of battery life remaining when the low battery icon initially appears. Actual battery life remaining will vary based on tasks being performed and ambient operating temperature.

Section 3.4.4 Programming Date & Time

Information

If the unit does not have the Data Logging option skip this section. The date/time function supports date/time recording capability that can be used in association with the Data Log option.

Note: HHC units without the Data Logging option have no requirement for the date time tracking and will not keep track of the date and time when powered down.

For various application oriented functions the use of a real time clock will be required. Setting the real time clock is a simple process and should be done when the HHC is received.

The real time clock may be set by following the steps below.

Step 1 With the HHC on and reading pressure press the SET UP key.

SET

UP

Step 2 Using arrow keys move through the menu selections and select “DateTime” on the LCD display.

DateTime will flash on the display when selected.

Owner Alarm

DateTimeRS232

Step 3 With the words “DateTime” flashing press the enter key.

ENT

This will activate the date time setup screen that looks as follows:

YYMMDDHHMMSS

XXXXXXXXXXXX

where:

YY = the last 2 digits of the current year

MM = the month (01 for Jan. through 12 for Dec.)

DD = the day of the month

(01-31 depending on day and month)

HH = the current hour using military time where: 0800 = 8:00 AM

1200 = noon

1500 = 3 PM

2000 = 8 PM

MM = minutes (from 0 to 60)

SS = seconds (from 0 to 60)

Setting the current date and time is accomplished by using the keys with the corresponding numerical values.

From left to right enter the appropriate number in each of the field positions using the numeral keys. Once a given field has the appropriate number entered the HHC will automatically index to the next position for entry.

When completed the date/time information should look as follows:

YYMMDDHHMMSS 961003111500

For a date/time of October(10), 3rd day (03), 1996 (96) at a time of 11:15 AM (1115), and 0 seconds (00).

When the correct time/date information has been entered and appears on the display press the enter key to store the time/date information in memory.

ENT

Time/date information is stored in battery backed up Random Access Memory (RAM). This information should only need to be changed or reentered when a time change has occurred, the HHC is to be used in a different time zone than the one in which it was in during

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initial setup or when the lithium battery used to back up the RAM needs replacement (every 1-2 years depending on the environmental conditions under which the HHC is used). RAM memory is only supplied if unit is purchased with data logging option. Time/date information is not maintained in HHC units without data log option.

Section 3.4.5 Input of Owner/Operator Information

The HHC has the ability to display, on power up, the name of the individual, department or company responsible for its use or maintenance.

The following steps are to be followed to input user (owner) data.

Step 1 With the HHC on and reading pressure press the Set Up key, designated SET UP.

SET

UP

Step 2 Using the arrow keys, select the Owner function from the setup menu. When selected the word “Owner” will flash on the display.

Owner Alarm

DateTimeRS232

Step 3 With the word “Owner” flashing press the enter key.

ENT

Step 4 After pressing ENT the display will read:

Access code? 000000

Step 5 A five digit owner access code was provided with your instrument at the time of shipment. Use the number keys on the HHC to enter the Owner Access Code from left to right.

Access code? 123456

Note: Two passwords were provided with your HHC. One password provides access to the owner programming field and the other provides access to the calibration data and recertification programming. Please be certain to select the correct password. These passwords are not interchangeable.

If, at any time during the entry process you enter a number in error, press the CE key to clear the entry and restart the access code entry process.

If the password codes have been lost, contact your calibrator supplier. The serial number of the base unit is required for the factory to provide product password

information.

Step 6 With the proper access code displayed press the enter key.

ENT

If an incorrect access code is entered the HHC will respond:

Access denied

To restart the entry process after the “access denied” response re-enter the owner set up function through the setup menu.

Step 7 After entry of the proper access code the display will read:

Enter owner name xxxxxxxxxxxxxxx

To enter a new owner name use the up and down arrows to scroll through the alphanumeric entries and the left and right arrows to move the active entry field (cursor) to the next location.

A blank can be inserted by using the down arrow with the letter A flashing on the display. Continuing to press the down arrow after the blank appears will provide access to numerical values starting at 9 and decreasing to 0. The label may contain alphabetical, numerical or a combination of both types of entries.

To review:

Up/down arrows provide access as follows:

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, _, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S,

T, U, V, W, X, Y, Z

By maintaining pressure on the up/down arrow the displayed number or letter will continue to change until the last character has been reached.

By pressing and releasing the up/down arrow a single step from letter or number can be accomplished.

The left/right arrow keys allow for entry of alpha numeric data in any of the available positions.

Step 8 After the desired operator information has been keyed the display will look as follows:

Enter owner name JOHN Q OPERATOR

Step 9 After the desired owner/user information has

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been entered and is displayed press the enter key.

ENT

The HHC will respond:

JOHN Q OPERATOR

Ent=OK CE=Cancel

Step 10 To store the owner/user information displayed press the ENT key. Pressing the CE key will return the HHC to the pressure measurement mode. If entry of new owner information is still required restart the process as outlined in steps 1-9 above.

Owner information is stored in Electrically Erasable Programmable Read Only Memory (EEPROM). This information should only need to be changed or reentered when the owner/user changes.

Section 3.5 Removing Quick Select Pressure or

Temperature Modules

Changing Quick Select pressure modules, therefore changing the measurement ranges in use, is quick and easy. Simply follow the steps below to change Quick Select pressure modules.

Step 1 Using the on/off key on the keypad of the base unit turn the power to the base unit off.

ON

OFF

Step 2 With one hand, hold base unit keypad side down and press down on the square retaining tab located near the upper strap pin on the bottom of the base unit.

Step 3 Maintain pressure on the retaining tab and with your other hand firmly grasp the pressure manifold that extends from the end of the Quick Select pressure module and slide the module out of the module bay.

Important Note: Both module bays of the base unit should contain a pressure module to protect from dirt or other debris getting into the base unit assembly. If only one Quick Select pressure module is needed install the System Protection Module (part number 875X114-01) supplied with your unit at the time of shipment.

Section 4.0 Key Function Overview

The HHC has a great deal of functionality. Many of the product capabilities are activated by dedicated keys on the keypad. Other functions are either activated or set up through a set up menu activated by pressing the set up

key. A brief overview of the function of each key follows

Key

Designation	Function
On/Off	Turn unit on and off.
Set Up	Provides access to set up functions for
	various on-board firmware functions/
	capabilities.
PORT SEL	Used to select displayed measure-ment
	data. Selection includes: reading pres-
	sure from either one or both installed
	sensors as well as selection of reading
	pressure and electrical measurements
	simultaneously. (See Section 5.0 for
	details.)
ZERO	Provides ability to zero, either one or
	both, Quick Select Modules. (See Sec-
	tion 6.0 for details.)
BAT CK	Provides graphical representation
	of remaining battery power levels.
	(SeeSection 3.4.2 for details.)

*ENG UNIT Used to select desired engineering unit from the following: psi, inHg, inWC,

	ftSW, Bar, mBar, kPa, Mpa, mmHg,
	cmWC, mmWC, kg/cm, user. Where
	“user” is an operator programmable
	engineering unit, allowing the display
	of any single engineering unit not
	included in the above list. (See Section
	8.0 for details.)
MIN/MAX	Displays the minimum and maximum
	pressure values measured. (See Sec-
	tion 11.0 for details.)
TARE	Allows for subtraction of an operator
	selected value from the displayed pres-
	sure measurement value for one or two
	Quick Select pressure modules. (See
	Section 9.0 for details.)
FLOW
	Provides ability to measure the flow of
	a gas in terms of velocity or volume.
	(See Section 14.0 for details.)
*LEAK	Allows testing for leaks in terms
	of pressure decay over time or in
	terms of leak rate. (See Section 15.0
	for details.)
DATA LOG	Provides set up capability for manual
	or (OPTIONAL)automated data log-
	ging. (SeeSection
Key

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Designation	Function
DATA STORE	Provides ability to store measured
	pressure or temperature values. (See
	Section 22.0 for details.)
HOLD	Freezes the displayed pressure and
	electrical measurements. (See Section
	10.0 for details.)
^	Moves cursor up.
*TRIP	Provides access to pressure
DETECT	switch testing firmware. (See Section
	18.0 for details.)
<	Moves cursor to the left.
*DAMP	Activates or disables dampused to
	smooth displayed pressure measure-
	ment data from the effects of low
	level pressure transients. (See Section
	12.0 for details.)
>	Moves cursor to the right.
CE	Clears previous entry.
mA/V	Changes electronic measurement
	display from mA to V or V to mA and
	can also be used to deactivate either
	side of the display. (See Section 7.0
	for details.)
v	Moves cursor down.
*%	Converts display from pressure units to
	% of f.s. (See Section 13.0 for details.)
ENT	Enters input data.

Notes on key functions:

* These functions require data input through activation of appropriate input fields in the setup menu. Examples of required input data include:

For Damping: Level of damping desired.

For Engineering Unit Selection: Water reference temperature or user (non library) engineering unit entry can be selected.

For Leak: Type of measurement (leak rate vs pressure decay), time to monitor and for leak rate applications the volume of the vessel to be monitored.

For % Readout: Input zero and span, output zero and span and device type (I/P, P/I, P/P, P/E).

The required data is input through the set up functions provided by the corresponding menu options accessed and available by pressing the setup key.

Complete details of each of the above outlined capabilities is included in the section referenced after the function summary provided above.

Section 5.0 Port Select Function

The Port Select Key, designated PORT SEL, provides the ability to select either of the two installed Quick Select modules for display, both modules for display or either a pressure/temperature module on one side and a current or voltage measurement on the other side of the display. For example, if the HHC has two pressure modules installed and is reading in psi the standard display for dual pressure readout would be:

psi psi +123456 +123456

Pressing the Port Select key once will result in the following display change:

psi mA +123456 +1.234

Pressing the Port Select key a second time will result in the following display change:

mA	psi
+1.234	+123456

Pressing the Port Select key a third time will result in the display returning to a dual pressure readout mode. As seen below:

psi	psi
+123456	+123456

If the HHC has a temperature measurement interface module installed the same type of sequence would be followed. For example, if the HHC had an RTD interface module installed in the left module bay the following sequence would be observed as a result of pressing the PORT SEL key:

oF	psi
+72.35	+123456

Pressing the Port Select key once will result in the following display change:

oF	mA
+72.35	+1.234

Pressing the Port Select key a second time will result in the following display change:

mA	psi
+1.234	+123456

Pressing the Port Select key a third time will result in

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the display returning to a readout mode featuring the measurement data from both of the installed modules. As seen below:

oF	psi
+72.35	+123456

See 8.4 for display of pressure in two different engineering units.

See Section 7.0 for display of current and voltage measurement data.

Section 6.0

Zero Function

This section applies to pressure measurement only. The zero function does not apply to the function of temperature measurement. The tare capability will function in conjunction with temperature measurement modules. This allows for the subtracting of a displayed or operator entered temperature value from the displayed temperature measurement data. See Section 9.0 for information on the tare function.

Pressing the zero key when two Quick Select pressure modules are installed and displayed will simultaneously zero both pressure modules. In addition, each module can be zeroed independently, as outlined in the following section.

It is recommended that the instrument be zeroed prior to use or calibration.

Section 6.1 Zeroing One of Two Installed Quick

Select Pressure Modules

If zeroing one of two installed modules is desired the following process should be followed:

In this example we will assume that the left pressure module is to be zeroed and the right pressure module is to be unchanged.

Step 1 Press the port select the number of times required (one or two) to deactivate the display of pressure on the side that you wish not to re-zero.

PORT

SEL

When set up in accordance with the requirements of this example the HHC will have the following

information on the display:

psi	mA
+12345	+1234

Step 2 With the pressure display deactivated for the side that is not to be zeroed press the zero key.

ZERO

The HHC will respond by displaying:

psi	mA
+00000	+1234

Step 3 To resume the display of pressure measurement data, for the pressure module not zeroed, press the port select key the required number of times (one or two) to restore the dual pressure display.

When complete the HHC will display:

psi psi +00000 +12345

Normal pressure measurement activity can now be resumed.

Section 7.0 Displaying Current and Voltage

Measurements

As outlined in the previous section the port select (PRT SEL) key is used to select the information seen on the display.

The display configurations available are:

Left Side of Display	Right Side of Display
pres/temp	pres/temp
pres/temp	electrical measurement
electrical measurement	pres/temp

The pressure/temperature value on the display corresponds with the measured value of the Quick Select module installed in the module bay on the corresponding side of the calibrator.

To read a current or voltage follow the steps below.

Step 1  With the HHC on and reading pressure/ temperature set the display as outlined in Section 5.0 to display the pressure measurement of the desired module.

Step 2 With the pressure measurement, for the desired module, displayed on one side and the electronic measurement on the other press the mA/V key until the desired electrical measurement parameter appears. For example, with a pressure module installed in the left module bay, pressing the mA/V key will produce the following results:

First display when electronic measurement is initiated through the port select function:

psi	mA
+123456	+1.234
Result from pressing mA/V key first time:
psi	------
+123456

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Result from pressing mA/V key a second time:

psi volts +123456 +1.234

Result from pressing mA/V key a third time:

psi	mA
+123456	+1.234

Using the combination of the port select function and the mA/V function any combination of electrical measurements and pressure measurements can be produced.

Section 8.0 Engineering Unit Selection-Pressure

Measurement

The HHC is factory programmed to provide pressure measurement in 12 engineering units. These include; psi, inches of mercury, inches of water, feet of sea water, bar, mbar, kilopascal, megapascal, millimeters of mercury, centimeters of water, millimeters of water and killograms per square centimeter.

Pressure measurement data may also be displayed in a user programmable non-library engineering unit. Section 8.2 Programming a Custom (User) Defined Engineering Unit provides complete details on setting up an operator defined engineering unit.

Inch, centimeter and millimeter of water engineering units may be set up for conversion at temperatures of 4 degrees and 20 degrees C or 60 degrees F. Consult

Section 8.5 H2O Reference Temperature Selection to program the desired temperature for inches or centimeters of water conversions.

Section 8.1 Selecting a Factory Programmed

Engineering Unit

To select an engineering unit from the on-board library follow the steps below:

Step 1 With the HHC on and displaying pressure measurement data press the engineering unit key. This key is designated ENG UNIT.

ENG

UNIT

The HHC will respond by displaying the engineering unit library as follows:

first screen:
psi	inHg	inWC	ftSW
Bar	mBar	kPa	mPa

second screen:

mm Hgcm WCmm WCkgcm user

The engineering unit abbreviations correspond to the following engineering units:

psi:	pounds per square inch
inHg:	inches of mercury
inH2O:	inches of water column*
ftSW:	feet of sea water
Bar:	bar
mBar:	millibar
kpa:	kiloPascals
mPa:	megaPascals
mmHg:	millimeters of mercury
cmWC:	centimeters of water column*
mmWC:	millimeters of water column*
kgcm:	kilograms per square centimeter
user:	user programmable engineering unit
	(see Section 8.2 for details)

*Conversion factor is programmable for temperature. Consult Section 8.5 for details.

Step 2 Using the left/right and up/down arrow keys select the desired engineering unit. When selected, the text for the desired engineering unit will flash.

psi inHg,inWCftSW Bar mBar kPa mPa

In the above example mBar is the selected unit.

Step 3 With the desired engineering unit flashing press the enter key.

ENT

The calibrator will respond by displaying the pressure measurement(s) in the newly selected engineering unit. If two Quick Select pressure modules are installed the output of both will be displayed in the selected engineering unit. The HHC can also display the measurement data of two installed Quick Select pressure modules in independent engineering units. Section 8.4 provides the set up procedures for dual sensor dual engineering unit operation.

Section 8.2 Setting up a Custom or User

Defined Engineering Unit

The HHC has a user programmable engineering unit available. This allows for the display of pressure measurement data in an engineering unit that is not in the library of the HHC. Any unit of pressure measurement that is linearly proportional to pressure change can be programmed for use in the user engineering unit field.

For this example, the pressure measurement unit of mSW (meters of sea water) will be used as the desired user engineering unit. To set the user engineering unit to provide pressure measurement data in mSW follow

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the steps below.

Step 1 With the HHC on and reading pressure press the key designated SET UP.

SET

UP

Step 2 Using the arrow keys select the User engineering unit option displayed as “UserEng”. The text “UserEng” will flash when selected.

BatFunc PerCent

UserEng H2Oref

Step 3 With the text “User Eng” flashing press the enter key.

ENT

Step 4 After pressing the enter key the HHC will respond by displaying:

Conv from psi

.000000

Step 5 Enter the conversion factor required to convert from psi to the engineering unit desired. For conversion from psi to mSW the conversion factor is 0.684482.

Enter 6 digits to provide the required resolution to support the accuracy of the HHC. A complete list of conversion factors is provided in Appendix A.

Use the number keys to enter the desired conversion factor, entering the required factor from left to right. For our example of mSW the conversion factor is 0.684482 and the display should read:

Conv from psi 0.684482

If an incorrect conversion factor is entered press the clear entry key, designated CE, to re-initiate the entry process for the correct factor.

Step 6 When the correct numerical value appears on the display press the enter key.

ENT

After entering the conversion factor the HHC will respond by displaying:

Enter unit’s name

_ _ _ _ _ _

Step 7 Enter the name of the engineering unit selected, abbreviated to 6 characters or less. For our example mSW is a 3 character abbreviation for meters of sea water. This abbreviation will fit in the 6 digit field. To enter the mSW engineering unit label use the up and

down arrow keys to increment or decrement through the alphabet/numerical values and the left and right arrows to move the active entry field (cursor) to the next location.

If needed for the desired engineering unit, a blank can be inserted by using the down arrow with the letter A flashing on the display. Continuing to press the down arrow after the blank appears will provide access to numerical values starting at 9 and decreasing to 0. The label may contain alphabetical, numerical or both types of entries.

To review:

Up/down arrows provide access as follows:

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, _, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S,

T, U, V, W, X, Y, Z

By maintaining pressure on the up/down arrow the display number or letter will continue to change until the last character has been reached.

By pressing and releasing the up/down arrow a single increment or decrement between letters or numbers can be accomplished.

The left/right and up/down arrow keys allow for entry of letters or numbers in any of the available label positions.

Step 8 For this example, after the engineering unit label has been keyed the display will read:

Enter unit’s name mSW

Step 9 With the desired engineering unit label displayed press the enter key.

ENT

After the enter key has been pressed the HHC will resume normal pressure measurement in the original engineering units. Instructions on how to use the custom engineering units are provided in the following section.

Section 8.3 Using A Custom Engineering Unit

After a custom engineering unit has been programmed it may be used by following the steps below. For information on programming a custom engineering unit refer

to Section 8.2 Setting up a Custom or User Defined Engineering Unit.

To display pressure measurement data in the user engineering unit:

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Step 1 With the HHC on and measuring pressure press the engineering unit key. Designated ENG UNIT on the keypad.

ENG

UNIT

The HHC will respond by displaying:

first screen:

psi inHg inWC ftSW Bar mBar kPa mPa

second screen

mm Hgcm WCmm WCkgcm user

Step 2 Using the left/right and up/down arrow keys select the word “user”. When selected the word “user” will flash.

mm Hgcm WCmm WCkgcm user

Step 3 With the word “user” flashing press the enter key.

ENT

The HHC will respond by displaying pressure measurement data in the following display format:

u_mSW u_mSW xxxxxx xxxxxx

where:

u_ indicates that the engineering unit in use is a user defined unit with a label of mSW

xxxxxx represents the current pressure measurement(s) in the user engineering unit.

See Section 8.4 Display of Two Engineering Units for information on how to simultaneously display the measured values from two Quick Select pressure modules in different engineering units.

Section 8.4 Display of Two Engineering Units

The HHC can display pressure measurement data from two installed Quick Select pressure modules in independent engineering units. To display two different engineering units simultaneously the following procedure should be followed.

Step 1 With the HHC on and displaying pressure measurement data from two Quick Select pressure modules press the engineering unit key, designated ENG UNIT on the keypad.

ENG

UNIT

Step 2 Using the arrow keys select either of the two desired engineering units. For this example we will select psi as one of the desired units.

With psi selected the text “psi” will flash on the display and the display will look as follows:

psi inHg inWC ftSW Bar mBar kPa mPa

Step 3 Press the enter key to select psi.

ENT

The HHC will respond by returning to the pressure measurement mode and will display the measurement data for both Quick Select pressure modules in psi, as follows:

psi psi +12345 +12345

Step 4 Next, press the port select to deactivate the display of pressure measurement data on the side that you wish to maintain pressure measurement in terms of psi. A pressure display is deactivated when the corresponding side of the display contains milliamp (mA) data, Voltage (V) data or is blank “ ------ ”.

See Section 5.0 for details on the port select function.

In this case we will assume that the right side will remain in psi and our goal is to present the measurement data from the left Quick Select pressure module in bar.

Pressing the port select one time will deactivate the left pressure display converting it to a mA measurement field. Pressing the port select a second time will deactivate the right side, converting it to a mA measurement field and returning the left side of the display to the function of pressure measurement.

Since we want the right side to remain psi we will deactivate it in the psi mode by pressing the port select key once.

PORT

SEL

The HHC will respond with the following display:

psi	mA
+12345	+1234

Step 5 With the right side deactivated from pressure measurement activities press the engineering unit key, designated ENG UNIT on the keypad.

ENG

UNIT

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The HHC will respond by displaying:

psi inHg inWC ftSW Bar mBar kPa mPa

Using the arrow keys select the desired engineering unit for the left side. In this example we have opted for the engineering unit of Bar. With the Bar engineering unit selected the display will look as follows with the text “Bar” flashing:

psi inHg inWCf tSW Bar mBar kPa mPa

Step 6 With the desired engineering unit selected (flashing) press the enter key.

ENT

The HHC will respond by displaying the following:

Bar	mA
+12345	+1234

Step 7 Reactivate the right side of the display for pressure measurement by pressing the Port Select key, as required.

First press of the port select key.

PORT

SEL

HHC will respond by displaying the following:

mA	psi
+1234	+12345

Second press of the

PORT

SEL

HHC will respond by displaying the following:

Bar	psi
+12345	+12345

Using this process, any engineering unit may be selected for display of the right or left Quick Select pressure module measurement data.

Section 8.5 Temperature Selection for H2O

Conversion Factor

The HHC includes a library of 12 factory programmed engineering units. This selection includes the engineering units inH2O, mmH2O and cmH2O. The pressure generated by a column of water will vary with the temperature of the water.

Over the years, several temperatures have evolved into industry standards. These are the conversion factors

most commonly used by manufacturers of pressure instruments when calibrating pressure measurement devices in terms of the height of a column of water. To facilitate your calibration and test of these instruments, the HHC includes 3 conversion factors for each of the water column based pressure engineering units. The conversion factors are for the temperatures of 4 and 20 degrees Celsius and 60 degrees Fahrenheit. The factory default setting is 20 degrees C.

The selection of the desired temperature for use in the conversion of water based pressure measurements can be accomplished by following these steps.

Step 1 With the HHC on and reading pressure press the SET UP key.

SET

UP

Step 2 Using the up/down and left/right arrow keys select the H2O reference option displayed as “H2Oref” in the set up menu. When selected the text “H2Oref” will flash on the display.

BatFunc PerCent

UserEng H2Oref

Step 3 With the text “H2Oref” flashing press the enter key.

ENT

The HHC will respond by displaying:

H2O ref temp 20C 60F 4C

Step 4 Using the left/right arrow keys select the desired temperature for the conversion factor. The selected value will flash on the display.

H2O ref temp 20C 60F 4C

In the above example the conversion factor for water at 60 degrees Fahrenheit was selected.

Step 5 With the desired temperature for the conversion factor flashing press the enter key.

ENT

The selected conversion temperature will be activated and will be stored in Electrically Erasable Programmable Read Only Memory (EEPROM). It will not have to be reentered on power-up unless a change in the reference temperature is desired.

After pressing the enter key the HHC will resume basic pressure measurement.

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Section 9.0

Tare Function

The HHC has the ability to tare (subtract an operator selected value) from the displayed pressure or temperature measurement value of either one or two installed Quick Select modules. This is most commonly required in applications where a pressure pre-load, as in a weighing application, must be subtracted from the displayed pressure measurement.

If the HHC is in use with two Quick Select modules, independent tare values can be entered for each of the pressure modules. If one of two installed Quick Select modules has been deactivated, meaning the measured values are not shown on the display, the calibrator will request a tare value only for the active module. To input a tare value for one or two Quick Select pressure modules follow the steps below:

Step 1 With the HHC on and displaying pressure measurement data press the tare key.

TARE

The HHC will respond by displaying the following:

Left tare value +xxxxxx

If a tare value was previously programmed the HHC will display that value. If the previous tare value was zero the HHC will display the last pressure measurement value displayed prior to pressing the TARE key.

Step 2 Use the number keys to input a tare value other than the default value or to change the existing tare value. If no tare value is desired input zero (0).

Warning: Failure to enter the zero (0) will result in the HHC automatically accepting the last displayed value as the desired tare value.

Left tare value +12345

Step 3   With the desired value displayed press the enter key.

ENT

The HHC will respond by displaying the following:

Right tare value +xxxxx

Step 4 Use the number keys to input a tare value other than the default value or to change the existing tare value. If no tare value is desired input zero (0).

Warning: Failure to enter the zero (0) will result in the HHC automatically accepting the last displayed value as the desired tare value.

Right tare value +12345

Step 5 With the desired value displayed press the enter key.

ENT

Note: The measurement data on the display will flash if the HHC is operating in the tare mode.

After pressing the enter key the HHC will resume normal pressure measurement activities. Tare values may be reviewed at any time by pressing the TARE key. If the HHC is being used with two Quick Select modules and only one module has a nonzero tare value the display will only flash on the side that corresponds to the Quick Select module with the nonzero tare value.

Step 6 To exit the tare mode follow the procedures outlined in steps 1 through 5 and at the tare value prompt enter zero (0). When the tare values for both modules have been reset to zero tare mode operation will be discontinued and the display will stop flashing.

Section 10.0 Hold Function

The hold function provides the ability to freeze the displayed pressure, flow or electrical measurement values. In addition, pressing the hold key will result in an H appearing in the RS232 output data stream and will also result in a flashing H appearing on the left side of the top line of the instrument display.

The RS232 output will look as follows for a dual sensor measurement:

Normal Operation

+1.2345 inH2O +1.2345 inH2O Left Min: +0.00000 Max: +1.2345 Right Min: +0.0000 Max: +1.2345 With Hold Function Invoked +1.2345 H inH2O +1.2345 inH2O Left Min: +xxxxx.x Max: +xxxxx.x Right Min: +xxxxx.x Max: +xxxxx.x

Section 10.1 Using the Hold Function

Step 1 To invoke the hold function press the hold key.

HOLD

The HHC will respond by freezing the displayed values and adding a flashing “H” that will appear in the left most position on the top line of the display.

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Step 2 To exit the hold function press any key.

Note: While in the hold mode, if the RS232 interface is enabled, the HHC will continue to transmit the displayed values.

Section 11.0 Minimum and Maximum Value

Tracking

The HHC monitors and stores in memory both the minimum and maximum pressure or temperature values measured. The following procedure will allow review of these values.

Step 1 To recall the minimum and maximum values simply press the key labeled:

MIN

MAX

The HHC will respond by displaying:

+2345 [phone]

where: maximum values are displayed on the top line and +12345 represents the maximum value(s) measured. Minimum values are displayed on the bottom line and 12345 represents the minimum value(s) measured.

If two Quick Select modules are installed, the min/max function recalls and displays the minimum and maximum values for both modules simultaneously.

Step 2 To clear the stored minimum and maximum value press the clear entry key:

CE

Pressing any key other than the CE key will maintain the stored values in memory.

Pressing any key on the keypad will return the HHC to normal pressure measurement activities.

Section 12.0 Damping

Damping provides the ability to stabilize the displayed or transmitted pressure value by minimizing the effects of low level transients and electronic instability. Damping is most commonly used with Quick Select pressure modules to overcome the effects of pressure pulsation and vibration transmitted through the measurement media. The level of damping is established in the set up menu. Activation of the damping process is accomplished through a dedicated key on the keypad.

Damping accomplishes the stabilization of the pressure measurement value by producing an averaged pressure value which is shown on the display and available for transmission over the RS232 interface. When damping is

not activated the HHC takes a new pressure value every 130 to 240mS (~8 times per second) and updates the display. If required, this same measurement data is also transmitted over the RS232 interface.

When damping is activated the value displayed and/or transmitted is an average value. The average consists of the average of from 1-16 consecutive readings. The higher the number of readings averaged the greater the stabilization effect of the damping. The number of

consecutive readings averaged is programmable, allowing the damping function to be tailored to the specific requirements of most any application.

Section 12.1 Set Up of the Damping Function

The following steps should be used to set up the level of damping desired.

Step 1 With the HHC on and reading pressure press the SET UP key.

SET

UP

Step 2 Using the arrow keys move through the set up menu and select “Dampen” on the display of the HHC. The word “Dampen” will flash on the display when selected.

EvntTimr Dampen

LeakRate Status

Step 3 With the word Dampen flashing press the enter key.

ENT

Step 4 In response to the activation of the dampening set up menu the HHC will respond by displaying the following:

fast	<	------- >
slow		X

Where the left most position represents zero damping (averaging of 1) and the right most position represents maximum damping (averaging of 16 readings). Starting from the left each movement of the highlighted box to the right increases the number of samples being averaged by one (1). By moving the highlighted field to the left the level of damping can be reduced.

The level of damping desired will likely vary from application to application and sensor range to sensor range. For best results, select the minimum amount of damping necessary to provide a stable display value. It is important to recognize that while damping will stabilize the displayed and/or transmitted value it will also slow down the response rate to a true pressure change. The slow

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down results from the fact that an averaged value will be displayed. If the damping level is set to 16 the displayed value will represent the average pressure measurement over the previous ~2 seconds (16 readings times 130 mS/reading). Therefore, the greater the level of damping in use the greater the time lag will be between the displayed measurement and the true (not averaged) pressure measurement value.

Use the left/right arrow keys to set the desired damping level, for example, averaging 8 readings as shown here.

fast <------------------> slow_ _ _ _ _ _ _ X _ _ _ _ _ _ _ _

Step 5 With the desired level of damping shown press the enter key to store the damping level in EEPROM.

ENT

The level of damping has now been set. Proceed to Section 12.2 for instructions on how the damping process is activated.

Section 12.2 Activating or Discontinuing the

Damping Function

The following process provides step by step instructions on how to activate or discontinue the damping function.

Step 1 Once established in the set up menu the damping process may be enabled or disabled through the use of the DAMP key on the keypad. To activate/deactivate the damping function press the DAMP key on the keyboard.

DAMP

In response to pressing the DAMP key the HHC will respond by displaying:

damping function Disable Enable

Step 2 Using the left or right arrow select “Disable” to turn damping off or “Enable” to initiate damping. When the desired option is selected (flashing) press the enter key.

ENT

On power up the HHC will default to damping disabled. Damping must be re-initiated via the keyboard after the instrument has been turned back on. The level of damping, established in the set up menu is stored in EEPROM and, therefore, does not need to be reprogrammed

after power up unless the level of damping desired has changed.

Section 13.0 Percent Function

The percent function allows the calibrator to display the output from a device under test in terms of percent error at a given percentage of the total range. This function applies to the calibration of both temperature and pressure transmitters. For example, if the HHC is being used to calibrate a 0-100 psi transmitter with a 4/20 mA output the HHC can be programmed to display the following data:

	Display
Pressure	Normal
Applied	Mode
0 psi	4 mA
25 psi	8 mA
50 psi	12 mA
75 psi	16 mA
100 psi	20 mA

The percent mode of operation allows for quick and easy determination of the level of inaccuracy of the device under calibration. For example:

If 50 psi was applied to a 100 psi device with a 0-10 Vdc output but instead of 5 Vdc the transmitter being calibrated had an output of 4.995 Vdc the HHC, when used in the percent mode, would display the following:

% scale % error +50 -0.05

Therefore, the percent mode of operation eliminates the need for operator calculations to determine the level of accuracy of the device under test.

If the HHC is equipped with the data logging option the percent error and percent full scale information can be stored in the calibrator on-board memory. To do this follow the set up instruction provided in Section 22.5 Manual Data Logging.

Section 13.1 Set Up of the Percent Function

The percent function is set up as follows:

Step 1 With the HHC on and reading pressure press the SET UP key.

SET

UP

Step 2 Using the arrow keys select the text “PerCent” from the setup menu. When selected the text “PerCent” will flash on the display.

BatFunc PerCent

UserEng H2ORef

Step 3 With the text “PerCent” flashing press the enter key.

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ENT

The HHC will respond by displaying:

Enter Input Zero

.000000

Step 4 Using the number keys enter the lowest calibration point for the device to be tested.

For example:

For a 0-100 inH2O range instrument enter zero. For a 3-15 psi transmitter enter 3.

For a -5 to 0 to + 5 inH2O transducer enter -5. For a 0-200 degree RTD enter 0

When the desired “zero” value has been entered the display will look as follows for the testing of a 0-100 in H2O transducer.

Enter Input Zero

.000000

If an incorrect value is entered use the CE key to clear the entry and re-key the zero value.

With the desired “zero” value displayed press the enter key.

ENT

The HHC will respond by displaying:

Enter Input FS

.000000

Step 5 Using the number keys enter the full scale range (F.S.) of the device to be calibrated. For our example of a 0-100 in H2O range instrument the display will look as follows:

Enter Input FS 100

Step 6 With the desired input full scale displayed press the enter key.

ENT

The HHC will respond by displaying:

Enter output Zero 0.0000

As with input zero, the output zero is the lowest output the device being calibrated will produce.

For example:

For a 0-10 Vdc output device enter zero.

For a 4/20mA output device enter 4.

For a 1-5 Vdc output device enter 1.

Step 7 With the desired output “zero” keyed in and displayed press the enter key.

ENT

The HHC will respond by displaying:

Enter output FS 0.0000

Step 8 Using the number keys enter the full scale output of the device being calibrated. For a 0-10 Vdc output device the display will look as follows:

Enter output FS 10

Step 9 With the desired full scale output displayed press the enter key.

ENT

The HHC will respond by displaying the following:

Device type I/P P/I P/P P/E

Using the left/right arrow keys select the appropriate device type where:

I/P	is a current to pressure device
P/I	is a pressure or temperature to current device
P/P		is a pressure to pressure device
P/E		is a pressure or temperature to voltage
device

In this case we are testing a 0-100 inH2O range transducer that produces a 0-10 Vdc output from zero to F.S. Therefore, the appropriate selection is P/I and the display will look as follows:

Device type I/P P/I P/P P/E

Step 10 With the desired device type flashing press the enter key.

ENT

At this time the HHC will return to basic measurement activities.

Section 13.2 Use of the Percent Function

Note: The HHC must be set up so that the desired Quick Select module is active and so that the desired electronic measurement is displayed prior to entering the % mode. Consult Sections 5.0 Port Select and 7.0 Current & Voltage Measurements for setup details.

Step 1 With the percent function set up, press the % key on the keypad of the HHC to activate the percent mode

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