Druck DPI 610LP, DPI 615LP Operating Manual

Sensing

& Inspection Technologies

Druck DPI 610/615

Portable Pressure Calibrator Series

User manual - K0415

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i K0415 Issue No. 2

Safety

The manufacturer has designed this equipment to be safe when operated using the procedures detailed in this manual. Do not use this equipment for any other purpose than that stated. This publication contains operating and safety instructions that must be followed to ensure safe operation and to maintain the equipment in a safe condition. The safety instructions are either warnings or cautions issued to protect the user and the equipment from injury or damage. Use suitably qualified * technicians and good engineering practice for all procedures in this publication.

Pressure

Do not apply pressures greater than the safe working pressure to this equipment.

Maintenance

The equipment must be maintained using the procedures in this publication. Further manufacturer’s procedures should be carried out by authorized service agents or the manufacturer’s service departments.

www.gesensing.com

For technical advice contact the manufacturer.

* A qualified technician must have the necessary technical knowledge,

documentation, special test equipment and tools to carry out the required work on this equipment.

Symbols

This equipment meets the requirements of all relevant European safety directives. The equipment carries the CE mark.

This symbol, on the instrument, indicates that the user should refer to the user manual. This symbol, in this manual, indicates a hazardous operation.

This symbol, on the instrument, indicates do not throw-away in domestic bin, hazardous material, dispose correctly in accordance with local regulations.

K0415 Issue No. 2 ii

Specification

Safe working pressure

20 bar range (300 psi) 1.75 x full-scale 350 bar range (5000 psi) 1.2 x full-scale 400 bar range (6000 psi) 1.5 x full-scale All other ranges 2 x full-scale

Accuracy

Combined non-linearity, hysteresis and repeatability

±70 mbar range (2 inHg) 0.05% F.S. up to ±150 mbar (4.4 inHg) 0.05% span 200 mbar to 20 bar (3 psi to 300 psi) [Calibrator]): 0.025% F.S. 35 bar to 700 bar (500 psi to 10000 psi) [Indicator] 0.025% F.S. 70 bar to 400 bar (1000 psi to 6000 psi) [Hydraulic] 0.025% F.S.

Pressure Ranges

Refer to the pressure range matrix in the data sheet.

Temperature Effects

±0.004% of reading/°C (averaged over -10° to +40°C w.r.t. 20°C) ±0.002% of reading/°F (averaged over +14° to 104°F w.r.t. 68°F)

Power supply

Batteries 6 x 1.5 V C cells, alkaline (up to 60 hours nominal use at 20°C) Rechargeable NiCad battery pack (20 hours nominal use) supplied with charger/ adaptor, supplies power to instrument while charging batteries.

Voltage Inputs

Range: ±50V Accuracy ±0.05% rdg, ±0.004% F.S. Resolution 100µV max

Voltage Outputs

Range: ±10V Accuracy ±0.1% Load 10mA

Range: ±24V Accuracy ±5% Load 26mA

Current Inputs

Range: ±55mA Accuracy ±0.05% rdg, ±0.004% F.S. Resolution 1µA max

Current Output

Range: 24mA Accuracy ±0.05% rdg, ±0.01% F.S. Resolution 1µA max

iii K0415 Issue No. 2

Display

Size: 60 x 60 mm (2.36” x 2.36”) LCD Graphics Reading ±99999, update rate 2 readings/sec

Environment

Operating Temperature: -10°C to 50°C (+14°F to 122°F) Calibrated Temperature: -10°C to 40°C (+14°F to 104°F) Storage Temperature: -20°C to 60°C (-4°F to 140°F) Calibration Temperature: 21°C ±2°C (70°F ±4°F)

Sealing

Physical

Size: 300 x 170 x 140 mm (11.8” x 6.7” x 5.5”) Weight: 3 kg (6.6lb)

Specification (contd.)

Sealed to IP54 (NEMA 4)

K0415 Issue No. 2 iv

Introduction

General

Description of Procedures 1

Summary of Functions

Using the Guide 2

Getting Started

Fitting Batteries 7 Switching On 7 Change Pressure Units 8 Voltage and Current Measurement 8 Typical Calibration Set-up (Pressure to Voltage) 9 Zero Display Reading 9

OPERATOR CONTROLS 3 DISPLAY 3 HARD KEY FUNCTIONS 4 SOFT KEYS 5 CURSOR KEYS 5 ELECTRICAL CONNECTIONS 6

Task Selection

Task Key 10 Using Task Functions 10 Set Units 10 Set 24 Volts 10 Cal Mode (DPI 615 versions only) 11 Basic Mode (Task BASIC) 11

Taking Measurements

Pressure Transmitter (P-I) Task 12 Voltage Output Pressure Transmitter (P-V) Task 12 Pressure Converter (P-P) Task 13 Current to Pressure Converter (I-P) Task 14 Pressure Switch Test (P-Switch) Task 14 Pressure Switch Testing with Contact Resistance Measurement 15 Pressure to Display (P-Display) Task 16 Leak Test (Leak Test) Task 17 Transmitter Simulator (TX SIM) Task 18 Relief Valve Test (REL VALVE) Task 19

v K0415 Issue No. 2

Advanced Task

Electrical Outputs (Loop Power) 25

General 20 Select Input 20 Ambient Temperature Measurement 20 Process Functions 21 Tare Process Function 22 Min/Max Process Function 23 Filter Process Function 23 Flow Function 24 % Span 24 Select Output 25

mA Step 26 mA Ramp 27 mA Value 28 24 Volt 28 Define New Task 29 Clear Task 29

Memory Operations

Saving Display or Data Log 30 Store Operations (Screen Snapshots) 30 Recalling Stored Data (Screen Snapshots) 30 Datalog Operations 31

Using Set-up

General 37 Store Mode 37 Contrast 37 Settings - Select Set-up Option 38

Auto Log (Timer) 31

Manual Logging 31 Recall Data Log Files 32 Uploading Data Log Files 33 Delete Data Log and Procedure Files 33 Downloading Procedure Files (DPI 615 versions only) 34 Running Procedure Files (DPI 615 versions only) 35 Recalling Data Files 36

Units 38

Define Special Units 38

Language 39

RS232 39

Powerdown 40

K0415 Issue No. 2 vi

Date and Time (Real Time Clock) 41

Backlight 42

Calibration

General 43 Calibration Check 43 Calibration Adjustment 43 General Procedures 44 Using The Calibration Menu 45 Change PIN 45 Pressure 46 Voltage Input Range (5 Volts) 47 Voltage Input Range (50 Volts) 49 Current Input Range (55 mA) 51 Current Output Range (24 mA) 53 Temperature 56 External Pressure Range 57 Add External Sensor 58

Hydraulic Calibrator Versions

Calibration 40

Date Format 41

Set Date 41

Set Time 41

Introduction 61 Safety Instructions 62 Preparation for Use 62 Bleeding the System 63 Draining the Hydraulic Fluid 64 Flushing, Replenishing or Changing the Hydraulic Fluid 65

Low Pressure Calibrator Versions

Introduction 69 Preparation for Use Low Volume Systems 70 Method of Testing with Low Volume Systems 70 Preparation for Use Larger Volume Systems 72 Method of Testing with Larger Volume Systems 74 Calibration 75 Calibrate Internal Pressure Range 75

Appendix 1 - Datalog File Example

Typical Uploaded Datalog File (DPI 610) 79 Typical Uploaded Procedure Data File (DPI 615) 80

vii K0415 Issue No. 2

K0415 Issue No. 2 viii

INTRODUCTION Summary of Functions

General

The versions of the DPI 610 and DPI 615 instruments are: pneumatic indicator, pneumatic calibrator, hydraulic calibrator and low pressure pneumatic calibrator. All instruments measure and display pneumatic and hydraulic pressure applied to the test port or to an externally connected pressure sensor. Pressure measurement can be absolute, gauge and sealed gauge and in ranges from 2.5 mbar to 700 bar (1.0 inH

The calibrator versions of this instrument contain pneumatic or hydraulic pressure generation components to produce pneumatic pressure ranges between -1 to 20 bar (-14.5 psi to 300 psi) and hydraulic pressure ranges up to 400 bar (6000 psi). The electrical connections, on the front of the instrument, enable the instrument to measure ±50 volts d.c. and ±55 mA and produce 10 volts d.c. or 24 volts d.c. and a maximum of 24 mA. An integral sensor provides measurement of ambient temperature. Additional sensors (option B1) connect to an external connector and extend the pressure measurement range and include differential pressure measurement. The instrument has an RS232 connector to enable uploading of test data to a compatible documenting system. The DPI 615 has the ability to download, from a PC, pre-defined calibration and test routines. Six alkaline C size batteries or (option A) rechargeable batteries with a charger/adaptor, power the instrument.

Important Notice

Zinc-carbon and zinc-chloride cells should NOT be used in this instrument.

Use only the battery types as shown in the table on page 7.

O to 10000 psi).

Description of Procedures

In the procedures outlined in this user guide, hard (fixed function) and soft (variable function) key operations are shown in bold type (e.g.) TASK and F1. These statements mean press the TASK key and press the F1 key. Soft key operations can be allocated to both the F1 and F2 keys. Where a specific soft function is referred to it is written in bold italics (e.g.) PROCESS. This instrument has a number of operating modes that are described in a simplified form in the following sections. Diagrams accompanying the procedures give typical selection sequences and shaded controls indicate that this control key should be pressed in the appropriate sequence. Diagrams should be read from left to right, top to bottom where appropriate. A shaded display soft box indicates that the function key immediately below that soft box should be pressed (either F1 for the left hand soft box or F2 for the right).

In the above diagram the following key sequence is indicated. (a) Press the F2 key (the key immediately below the

(b) Use the

shaded, use all these keys to select or enter data).

and

Down

cursor keys (only) to select the required option. (If all keys

PRESSURE UNITS

1 K0415 Issue No. 2

soft box).

INTRODUCTION Summary of Functions

Using this guide

The following key symbols are used in the procedure diagrams that follow:

SELECT VALUE

Shaded cursor keys indicate that a combination of these four keys, Up, Down, Left and Right should be used to (e.g.) enter an alpha numeric value or to select a function.

Indicates the ENTER key. Used to confirm an operation or a selection. Shading indicates key operation.

Exit key, used to clear current menu selection and return to next menu level above current level. Used as an escape key from current operation. Shading indicates key operation.

Hardkey (total 7). Legend beside key symbol indicates function. Shading indicates key operation.

Maximum Instrument Ratings

The following table shows the maximum measurement input ratings of the instrument that should not be exceeded.

PRESSURE 120% FULL SCALE

VOLTAGE 50 V d.c.

CURRENT 55 mA d.c.

Note 1: The display flashes if the input pressure, voltage or current overrange.

Note 2: Max applied voltage for external loop supply = 30V dc (see page 8).

K0415 Issue No. 2 2

PRESSURE INT

bar

VOLTAGE

F2F1

CURRENT

PRESSURE

UNITS

TASK: BASIC

DPI 615

PRESSURE INT bar

VOLTAGE

CURRENT

UNITS

PRESSURE

TASK: BASIC

Status display

Input display

Output display

Soft boxes

INTRODUCTION Summary of Functions

OPERATOR CONTROLS (Figure 1 and 2)

These divide into two groups, the operator/display controls (Figure 1) and the pressure/ vacuum generation components (Figure 2). The operator controls and a typical display, common to all instrument versions, is shown below.

1 Display 2 Electrical Input Sockets 3 Electrical Output Sockets 4 Cursor 5 Enter Key 6 On/Off Key 7 Function (soft) Keys 8 Hard Keys

Figure 1 - DPI 610/615 Key-pad

Display

The display section of the instrument basically divides into four distinct sections. The two main sections of the display are used to display a input and an output. The remaining sections show the status display area and define the soft key functions. A typical display is shown below:

3 K0415 Issue No. 2

INTRODUCTION Summary of Functions

HARD KEY FUNCTIONS (Figure 1)

Key Function

I/O

SETUP*

ZERO

INPUT*

TASK

OUTPUT*

This key is used to turn the instrument ON and OFF. 7

The

SETUP

key provides access to the instrument’s general configuration parameters that are set up to certain default parameters on delivery.

The

ZERO

key can be used to zero either the selected input or output display, if the display reading is within 5% of zero. Attempts to zero a larger offset result in an error message,

The

INPUT

key is used to select the input parameter to be displayed. 20, 21

The

TAS K

key is used as a means of rapidly configuring the instrument for a number of different types of external device calibration. There are twenty task configurations available, eleven of which are preprogrammed and nine are user definable

The

OUTPUT

key is used to select output parameter to be displayed. 25-28

Zero too large.

Page

reference

STORE*

RECALL*

ENTER

EXIT

Depending upon how the instrument’s is used either to store up to 20 display screens (in or to manually log a screen in

This key is used to recall a previously stored screen to the display. Depending on the either the snapshot of a previously stored screen or datalog file. In

STORE

mode, selection displays the last screen stored. By using the cursor keys, the operator can scroll either forward or back through memory locations.

The

ENTER

conjunction with the soft keys, to accept a given selection.

The

EXIT

keys to exit from the current screen or menu level, to the level immediately preceding it. To quit completely from any menu level, press

key is used either to enter data (accept entered data), or, in

key operates in conjunction with all the other hard and soft

EXIT

until the

STORE

MEASURE/SOURCE

DATALOG

mode set-up, operation of this key recalls

STORE

mode.

screen is displayed.

* These key functions are not available in BASIC mode

mode is setup, this key

SNAPSHOT

mode),

30-36

30, 32-36

K0415 Issue No. 2 4

INTRODUCTION Summary of Functions

SOFT KEYS (Figure 1)

Three soft keys, designated F1, EXIT and F2, are situated immediately below the display as shown below. These keys have their function allocated by the instrument software which is indicated in the bottom of the display (Voltage for F1 and Units for F2 in this example). They are used to select menu (program) options and are fully described under the appropriate section headings.

CURSOR KEYS (Figure 1)

The cursor keys consist of a block of four keys, designated up , down , left and right . In programs where options need to be selected from a list, (e.g.) the TASK

selection program, the up and down cursor keys are used to highlight one of the options, from which it can be selected by the ENTER key. In TASK mode, where more

than one page of options are provided, the left and right cursor keys will switch between pages.

1 Test port, connect to unit under test 2 Hard keys 3 Cover (external interfaces) 4 Electrical inputs 5 Electrical outputs 6 Cursor keys 7 Function (soft) keys 8 Release valve (releases pressure through 9) 9 Vent port 10 Select positive or negative pressure 11 Pump 12 Fine pressure adjuster

Figure 2 - DPI 610/615 Calibrator Controls

5 K0415 Issue No. 2

PRESSURE INT

bar

VOLTAGE

F2F1

CURRENT

UNITS

PRESSURE

TASK: BASIC

DPI 615

INPUTS

OUTPUTS

INTRODUCTION Summary of Functions

ELECTRICAL CONNECTIONS

1 Cover, closed when

not using connectors 2 External transducer 3 RS232 connector 4Temperature sensor 5 DC power input

Figure 3 - Electrical System Connections

Measurement inputs and Source outputs are made via the control panel sockets as shown below.

1 Status display 2 Input display 3 Electrical input sockets 4 Electrical output sockets 5 Output display

Figure 4 - Electrical Measurement Inputs/Outputs

K0415 Issue No. 2 6

Getting Started

Fitting Batteries

1Cover fixing screws.

2 Rechargeable NiCad pack Part no.

191-126

3 Six alkaline C-cells Type no. LR14.

Caution: Old batteries can leak and cause corrosion. Never leave

discharged batteries in the instrument.

Note: After fitting a rechargeable NiCad battery pack the display may show the battery

low indication caused by the battery pack not being fully charged. Use the power adaptor/charger to fully charge the pack.

Switching On

Press the I/O switch on the front panel and proceed as follows.

The first time the instrument powers up, it will be in BASIC mode with the main screen displaying voltage in the input display area and pressure in the output display area. To switch to CURRENT as input, press F1 as shown. Similarly, F1 to return to VOLTAGE.

Note: No other keys are active in this mode and the instrument can only be reconfigured

by pressing the TASK key and selecting another mode.

7 K0415 Issue No. 2

55mA

Vin

mA in

mA Sink

mA out 10V out

Xmtr

24V out

max 50V

CAT II

max

55mA

Vin

mA in

mA Sink

mA out 10V out

Xmtr

24V out

max 50V

CAT II

max

55mA

Vin

mA in

mA Sink

mA out 10V out

Xmtr

24V out

max 50V

CAT II

max

LOAD

Getting Started

Change Pressure Units

To change the pressure units proceed as follows. If the four units displayed are not the units required, press TAS K and select any task, other than BASIC, press SETUP and proceed as detailed on page 37. To return to BASIC mode, press TASK and select BASIC.

In BASIC mode, the instrument is configured to carry out basic Pressure to Voltage (P to

V) or Pressure to Current (P to I) tests, a typical test procedure follows.

Voltage and Current Measurement

Connect the electrical input sockets as follows for voltage and current measurements. Use the test leads provided and DO NOT push bare wires into the sockets.

Note: Maximum applied voltage = 50V dc,. Maximum input current = 55mA dc

Note: Maximum applied voltage for external loop supply = 30V dc

K0415 Issue No. 2 8

F2F1

bar

CURRENT

PRESSURE

UNITS

TASK: BASIC

DPI 615

ZERO

VOLTAGE

PRESSURE INT bar

YES

ZERO VOLTAGE DC ?

VOLTAGE

PRESSURE INT bar

ZERO

INPUT

ZERO

OUTPUT

TASK: BASIC TASK: BASIC

ZERO

VOLTAGE

PRESSURE INT bar

YES

ZERO INTERNAL SENSOR ?

VOLTAGE

PRESSURE INT bar

ZERO

INPUT

ZERO

OUTPUT

TASK: BASIC TASK: BASIC

Getting Started

Typical Calibration Set-up (Pressure to Voltage)

Connect a device under test to the instrument as shown below:

A - External pressure source (indicator instruments only) B - Pressure regulator C - Excitation 10V

General procedure

• Use the hand-pump to pressurize the system to the required level as indicated on the

display. Allow the display to settle and screw the volume adjuster in or out as a fine

adjustment to the required pressure. Record the input (e.g.) Voltage, reading at each

applied pressure.

Zero Display Reading

Both the input and output readings can be set to zero using the ZERO key and if the displayed reading is within 5% of zero. To zero either the INPUT or OUTPUT displays, proceed as follows:

9 K0415 Issue No. 2

BASIC

USER TASKS

P - SWITCH

ADVANCED

REL VALVE

LEAK TEST

TX SIM

TASKS TASKS TASKS

P - DISPLAY

P-I

I-P

P-P P-V

Current (Page 2) (Page 3)

OUTPUT

SELECT

FUNCTION

UNITS

inHg

hPa Pa

bar

SELECT FUNCTION

SELECT UNITS OF PRESSURE

SELECT UNITS

24 VOLT

OFF

OUTPUT

SELECT ON/OFF

SELECT FUNCTION

SELECT OUTPUT

24 VOLT

OFF

UNITS

24 VOLT

UNITS

SELECT OUTPUT

Task Selection

TASK key

The TASK key is used to set-up the instrument for a number of specific types of test. There are two modes BASIC and ADVANCED and nine other specific types of test that automatically configure the instrument on selection from the TAS K menu. The tasks available under the TAS K menu are held on three pages shown below. To select a task from the menu, press the TASK key, position the cursor over the required task and press the ENTER key as shown below. Use the right/left cursor keys to switch between pages.

Using Task Functions

Specific tasks are selected as shown above. The following diagrams show how to connect the unit under test (UUT) for each task selectable under the TA SK menu.

Input and output units, where applicable, can be selected by pressing either the INPUT or OUTPUT keys as shown below. The output key also provides the facility of turning the 24V output supply ON and OFF. When not in use, the 24V supply output should be turned OFF to conserve battery power.

Set Units

Note: If the four units displayed are not the units required, press SETUP, select SETTINGS

and refer to page 38.

Set 24 Volts

K0415 Issue No. 2 10

0.00

2000.00

OUTPUT

MAX. ERROR

ERROR TYPE

CHANGE

VALUE

psi

4.00

20.00

LINEAR

0.05%

%span

SELECT VALUE

psi

TASK : P-I DATALOG

24V OFF

..........

. %span FAIL

TURN OFF CAL MODE

TURN ON

CAL MODE

TASK : P-I DATALOG

24V OFF

..........

psi

Task Selection

Cal mode (DPI 615 versions only)

Cal mode, which is available in tasks P-I, P-P, P-V, P-P, P-DISPLAY and P-SWITCH, provides a method of setting-up test parameters manually. Downloaded test procedures can also automatically set-up and turn on the Cal Mode function. The method of turning on and setting-up Cal Mode is shown below for a P-I task. The method is similar for all the other tasks available in Cal Mode.

Pressing the F1 key (TURN ON CAL MODE), provides the set-up screen for the CAL mode. Initially, the cursor is placed in the UUT SPAN field to allow the required span range to be entered. The corresponding values for the UUT output parameter (current) are then set, followed by the maximum error value and error type (% rdg or % span). When all test parameters have been set-up, the screen changes to display the input and output and the test results. The test result can only be displayed to within a range of ±9.99%. If the test result is outside this range, either the left pointing (-ve error) or right pointing (+ve error) chevrons are displayed. Within this error band, the actual tolerance value is displayed. Test results can either be stored as snapshots or logged as datalog files, depending upon how the instrument has been set-up.

Basic Mode (Task BASIC)

This instrument powers up in this mode the first time that it is used. To select BASIC from any other task, press the TASK key and select BASIC and press the ENTER key. BASIC mode is fully described in the Getting Started, section (see page 7).

11 K0415 Issue No. 2

F2F1

bar

TASK : P-I SNAPSHOT MODE

24V OFF

DPI 615

F2F1

bar

CURRENT

PRESSURE

UNITS

TASK: BASIC

DPI 615

Taking Measurements

Pressure Transmitter (P-I) Task

Select the P-I task from the task menu and connect the Unit Under Test (UUT) to the calibrator as shown below.

A - External pressure source (indicator instruments only) B - Pressure regulator C - Pressure to current 24V device

• If required, select the output units as described on page 10.

• If applicable, turn on Cal Mode and set-up test parameters as detailed on page 11.

Voltage Output Pressure Transmitter (P-V) Task

Select the P-V task from the task menu and connect the UUT to the calibrator as shown below. Voltage output transducers with a 10 V supply and outputs of ±10 V can be calibrated using the 10V output sockets (supply) and the transducer output connected to a voltmeter (refer to Method on page 13 for a test procedure).

A - External pressure source (indicator instruments only) B - Pressure regulator C - Excitation 10V

• If required, select the output units as described on page 10.

• If applicable, turn on Cal Mode and set-up test parameters as detailed on page 11.

K0415 Issue No. 2 12

Taking Measurements

Pressure Converter (Pressure to Pressure) Task

Select the P-P task from the task menu and connect the UUT to the calibrator as shown below. Testing a converter requires one pressure to be applied to the unit under test (UUT) and another (converter output) to be measured. The additional measurement is provided by the external transducer option.

Method

• Connect the UUT to the calibrator and plug the external transducer into the

calibrator as shown below.

A - External pressure source (indicator instruments only) B - Pressure regulator C - External pressure supply D - Pressure to pressure device E - External transducer

• Press the TASK key and select the P-P task. Providing the external transducer has

been calibrated and its parameters stored in the calibrator, the display shows

External pressure in the input window and calibrator Output pressure in the output

window. If an error message “NO SENSOR OR CAL INVALID” is displayed, this

indicates that the external transducer has not been entered and/or calibrated with

the calibrator. Refer to page 45 for details of adding an external transducer. If an

external transducer change is made, switch the calibrator off and then on to load

new transducer data.

• If required, select the input and output units as described on page 10.

• If applicable, turn on Cal Mode and set-up test parameters as detailed on page 11.

Note: Match pressure ranges to give required accuracy and avoid overpressure. If

external pressure is required as the output and internal pressure the input, use ADVANCED mode for this set-up.

13 K0415 Issue No. 2

F2F1

bar

OUTPUT

NEW VALUE

TASK : I-P SNAPSHOT MODE

24V OFF

DPI 615

TURN ON

CAL MODE

F2F1

bar

RUN

CONTACTSTATE

TASK : P-SWITCH SNAPSHOT MODE

24V OFF

DPI 615

Taking Measurements

Current to Pressure Converter (I-P) Task

A - External pressure supply B - Pressure to current device (24V)

•Use the up and down cursor keys to adjust the loop current to the required

value. Alternatively, press ENTER and use cursor keys to enter a finite value. Cursor

keys can then be used to nudge the output either up or down. If required, change

pressure units with INPUT key.

Pressure Switch Test (P-SWITCH) Task

A - External pressure source (indicator instruments only) B - Pressure regulator C - Pressure switch under test

• Contact state will be shown on display. When contacts close, buzzer sounds.

• To run switch test, close vent valve and press the RUN (F1) key.

• Using the hand-pump, increase the applied pressure to just below the switch

operating point. Screw the volume adjuster in until the switch operates (the display

then shows the operating pressure of the switch).

• Reduce pressure until the switch releases (indicated by the switch symbol). The

display then shows the release pressure and the hysteresis value.

K0415 Issue No. 2 14

F2F1

bar

RUN

CONTACTSTATE

TASK : P-SWITCH SNAPSHOT MODE

24V OFF

DPI 615

INPUT

SELECT

RESISTANCE

SELECT

ZERO

SELECT

FUNCTION

RESIST

OFF

ZERO

SELECT

FUNCTION

RESIST

ZERO

Connect Vin +, SW + and mA in + together.

Connect Vin +, SW + and mA in

+ together.

Connect switch test leads across switch symbol.

Connect switch

test leads

across switch

symbol.

Open circuit test leadsOpen circuit test leads

Press ENTER to continue.Press ENTER

to continue.

Switch Resistance input now ready for use.

Switch Resistance input now

ready for use.

Press ENTER to continue.Press ENTER

to continue.

Open circuit test leads.Open

circuit test leads.

Now short test leads.Now short test leads.

Press ENTER to continue.Press ENTER

to continue.

bar

RUN

CONTACT STATE

TASK : P-SWITCH SNAPSHOT MODE

24V OFF

RUN

bar

CONTACT STATE

CLOSED AT 15.060 bar OPENED AT 14.059 bar HYSTERESIS 1.001 bar RESISTANCE 3 m

TASK: P-SWITCH SNAPSHOT MODE

Taking Measurements

Pressure Switch Testing with Contact Resistance Measurement

A - External pressure source (indicator instruments only)B - Pressure regulator C - Pressure switch under test

To perform switch test with contact resistance measurement, select P-SWITCH and proceed as follows:

To ensure accurate measurements it is recommended that the zero procedure (that compensates for the resistance of the test leads) is carried out before performing this test.

Note: Allow sufficient time after contact closure for the resistance to stabilize.

The switch test is performed in the same way as the previous section, except that the contact resistance is measured and displayed with the results.

15 K0415 Issue No. 2

F2F1

bar

DISPLAY

CHANGE

VALUE

TASK : P-DISPLAY LOG FILE: NONE

24V OFF

TURN ON

CAL MODE

DPI 615

ENTER VALUE

DISPLAY

CHANGE

VALUE

DISPLAY

CHANGE

VALUE

DISPLAY

LOG NOW

STOP

LOGGING

STORE

bar bar

bar

TASK: P-DISPLAY LOG FILE: A1

24V OFF 24V OFF 24V OFF

DISPLAY

bar

LOG NOW

STOP

LOGGING

STORE

FINAL POINT

TASK: P-DISPLAY LOG FILE: A1

24V OFF

Taking Measurements

Pressure to Display (P - Display) Task

P-Display is a special application of Datalog. To use this mode, select Datalog from the Store Mode menu as detailed on page 37. Connect the UUT to the instrument as shown below and, if required, turn on and set-up Cal Mode (see page 11).

A - External pressure source (indicator instruments only) B - Pressure regulator C - Dial gauge under test

• Press

TASK

and select

P-DISPLAY

. If required, use

OUTPUT

key to change pressure units.

• Set-up a data log file as detailed on page 31.

Note: TRIGGER field, automatically set to KEYPRESS, cannot be changed.

• Apply a series of test pressures to the device under test. Enter displayed reading at

each pressure and log each point:

• After logging final test point, terminate as

follows:

K0415 Issue No. 2 16

PRESSURE INT

bar

F2F1

RUN

CHANGE

VALUE

WAIT DURATION

START PRESS STOP PRESS

PRESS CHANGE LEAK RATE

secs secs

bar bar

bar bar/m

TASK : LEAK TEST SNAPSHOT MODE

24 V OFF

DPI 615

SET WAIT TIME SET DURATION

CION

WAIT DURATION

START PRESS STOP PRESS

PRESS CHANGE

180

LEAK RATE

secs secs

bar bar

bar bar/m

PRESSURE INT bar

CHANGE

VALUE

RUN

TASK : LEAK TEST SNAPSHOT MODE

CION

WAIT DURATION

START PRESS STOP PRESS

PRESS CHANGE

180

LEAK RATE

secs secs

bar bar

bar bar/m

PRESSURE INT bar

CHANGE

VALUE

RUN

TASK : LEAK TEST SNAPSHOT MODE

24 V OFF

Taking Measurements

Leak Test (LEAK TEST) Task

A - External pressure source (indicator instruments only) B - Pressure regulator C - Unit/system under test

• If required, use the INPUT key to change pressure units.

• Set-up the leak test WAIT and DURATION times to the required values as shown

below. Recommended minimum wait period - 3 minutes.

• Close the vent valve and pressurize the unit/system to the required LEAK TEST

pressure.

•Press the RUN (F2) key to start the leak test. When completed, the beeper sounds

and the leak test results are written to the display.

17 K0415 Issue No. 2

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