Transmille 3010, 3041 Operating Manual

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3000A Series

Precision Multi Product Calibrator

Operation Manual

Version 5.00: February 2011 All product names are trademarks of their respective companies

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3000A SERIES OPERATION MANUAL

IMPORTANT NOTICE

THIS CALIBRATOR

WILL

REQUIRE AN

UNLOCK CODE

AFTER THE EVALUATION

PERIOD HAS EXPIRED.

(60 Days after invoice date)

AFTER THE EVALUATION PERIOD HAS EXPIRED THE

OPERATION OF THE CALIBRATOR IS LOCKED AND THE DISPLAY

SHOWS A NUMBER WHICH MUST BE QUOTED TO TRANSMILLE

TO RECEIVE THE UNLOCK CODE

THE UNLOCK CODE IS AVAILALBLE

FROM TRANSMILLE

ONLY AFTER PAYMENT

HAS BEEN RECEIVED.

This code only needs to be entered once

in the life of the instrument.

Please contact Transmille or use the form in the

back of the manual to obtain the unlock code.

Transmille Ltd.

Staplehurst, Kent.

Tel: 44 (0)1580 890700 Fax: 44(0)1580 890711

Email: [email protected]

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3000A SERIES OPERATION MANUAL

DECLARATION OF CONFORMITY

Manufacturer’s Name: Transmille Ltd. Manufacturer’s Address: Unit 4, Select Business Centre Lodge Road Staplehurst TN12 0QW Declares, that the product

Product Name: Multi-product Calibrator Model Number: 3050A / 3041A / 3010A Product Options: This declaration covers all options of the above product(s)

Conforms with the following European Directives:

The product herewith complies with the requirements of the Low Voltage Directive 73/73EEC and the EMC Directive 89/336/EEC (including 93/68/EEC) and carries the CE Marking accordingly

Conforms with the following product standards:

EMC

EN 61326-1:1997+A1:1998 • EN55011:1991 (Group 1 : Class A)

Standard Limit

IEC 61000-4-2:1995+A1:1998 / EN 61000-4-2:1995 4kV CD, 8kV AD IEC 61000-4-3:1995 / EN 61000-4-3:1995 3 V/m, 80-1000 MHz IEC 61000-4-4:1995 / EN 61000-4-4:1995 0.5kV signal lines, 1kV power lines IEC 61000-4-5:1995 / EN 61000-4-5:1995 0.5kV line-line, 1kV line-ground IEC 61000-4-6:1996 / EN 61000-4-6:1996 3V, 0.15-80 MHz / cycle, 100% IEC 61000-4-11:1994 / EN 61000-4-11:1994 Dips: 30% 10ms; 60% 100ms Interrupt > 95%@5000ms

SAFETY

IEC 61010-1:1990+A1:1992+A2:1995 / EN 61010-1:1993+A2:1995

16/01/2006

Revision No: 1.0 Managing Director Date: 16/01/2006

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TABLE OF CONTENTS

3000A SERIES CALIBRATOR INTRODUCTION .................................................................................6

MAIN FEATURES ...................................................................................................................................6

ACCURACY AND FUNCTIONALITY............................................................................................................7

TRUE MULTIPRODUCT CALIBRATION FROM ONE INSTRUMENT ...................................................7

RETRO FIT OPTIONS ALLOWS ADDITIONAL FUNCTIONS TO BE ADDED. ...........................7

SERIAL LINE RS232 INTERFACE FITTED AS STANDARD..............................................................8

OUTPUT CONNECTION ..........................................................................................................................8

PREPARING THE CALIBRATOR FOR USE. .......................................................................................9

INITIAL INSPECTION. ..............................................................................................................................9

LIFTING AND CARRYING THE CALIBRATOR ..............................................................................................9

POSITIONING THE CALIBRATOR............................................................................................................10

REAR PANEL CONNECTIONS AND CONTROLS .......................................................................................11

SETTING AND CHECKING THE LINE VOLTAGE. .......................................................................................12

POWER LINE INLET FUSE AND RATING..................................................................................................12

CONNECTING TO A COMPUTER.............................................................................................................13

POWERING UP THE CALIBRATOR ..........................................................................................................13

OUTPUT CONNECTIONS ......................................................................................................................14

OUTPUT OVERLOADS..........................................................................................................................15

OPERATION ........................................................................................................................................16

SAFETY WARNINGS ............................................................................................................................16

INTRODUCTION TO OPERATION ............................................................................................................16

FRONT PANEL CONTROLS AND INDICATORS .........................................................................................17

FRONT PANEL KEYBOARD ...................................................................................................................17

FRONT PANEL KEYBOARD – CONTROL SECTIONS ................................................................................18

GRAPHIC LCD DISPLAY ......................................................................................................................19

DIGITAL CONTROL ..............................................................................................................................20

TERMINAL STATUS LED’S....................................................................................................................21

9 PIN ADAPTER INTERFACE CONNECTOR. ............................................................................................23

SETTING DC VOLTAGE AND CURRENT OUTPUT....................................................................................24

ADJUSTING THE SET OUTPUT USING THE DIGITAL CONTROL ...................................................................25

AUTOMATIC DISPLAY OF % OR PPM ERROR AND REF. KEY ...................................................................26

SETTING AC VOLTAGE AND CURRENT OUTPUT. ...................................................................................27

RETURNING THE CALIBRATOR TO DC ...................................................................................................28

SETTING 2 WIRE RESISTANCE OUTPUT. ..............................................................................................29

SETTING 2 WIRE SIMULATED RESISTANCE (OPTION)............................................................................31

SETTING 4 WIRE RESISTANCE OUTPUT. ..............................................................................................32

USING CURRENT COILS (OPTION) .......................................................................................................34

SETTING CAPACITANCE OUTPUT. ........................................................................................................36

SETTING INDUCTANCE OUTPUT (OPTION) ............................................................................................37

THERMOCOUPLE SIMULATION (OPTION)...............................................................................................38

SPECIAL FUNCTIONS AVAILABLE USING THE ‘SOFT’ KEYS ......................................................................43

CONNECTING OUTPUT NEGATIVE TO LINE EARTH (GROUND)..................................................................43

SELECTING FRONT PANEL CONTROL.....................................................................................................43

SETTING TTL LOGIC FREQUENCY OUTPUT. .........................................................................................44

SETTING RPM OUTPUT WITH EA003 ADAPTOR (OPTION) ....................................................................45

SETTING PWM (MARK SPACE RATIO) .................................................................................................46

SELECTING PRT (PT100) RESISTANCE OUTPUT (OPTION) ..................................................................47

SELECTING SIMULATED PRT (RO) OUTPUT (OPTION)..........................................................................48

SELECTING AC POWER CALIBRATION OUTPUT (OPTION)......................................................................50

SELECTING DC POWER CALIBRATION OUTPUT (OPTION) .....................................................................53

SELECTING OSCILLOSCOPE CALIBRATION OUTPUT (OPTION)................................................................54

CALIBRATE .........................................................................................................................................56

SETUP (BEEPER / PASSWORD / ADAPTERS).........................................................................................56

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WARNING AND OUTPUT OVERLOAD INDICATIONS. .................................................................................58

HIGH VOLTAGE TIMEOUT.....................................................................................................................58

30 AMP TEMPERATURE CUT-OUT ........................................................................................................58

INTERFACE TYPES ............................................................................................................................59

RS232 INTERFACE .............................................................................................................................60

USB INTERFACE.................................................................................................................................62

REMOTE PROGRAMMING .................................................................................................................63

PROGRAMMING COMMANDS OVERVIEW ...............................................................................................64

DC VOLTAGE COMMANDS...................................................................................................................66

AC VOLTAGE COMMANDS ...................................................................................................................68

DC CURRENT COMMANDS ..................................................................................................................70

AC CURRENT COMMANDS ..................................................................................................................72

RESISTANCE COMMANDS ....................................................................................................................74

CAPACITANCE COMMANDS ..................................................................................................................76

SIMULATED RESISTANCE COMMANDS (OPTION) ...................................................................................77

SIMULATED CAPACITANCE COMMANDS (OPTION) .................................................................................78

TTL FREQUENCY COMMANDS (OPTION) ..............................................................................................80

PULSE WIDTH MODULATION COMMANDS (OPTION) ..............................................................................82

INDUCTANCE COMMANDS (OPTION) .....................................................................................................84

PRT100 COMMANDS (OPTION)...........................................................................................................86

THERMOCOUPLE SIMULATION COMMANDS (OPTION) ............................................................................88

MISCELLANEOUS COMMANDS..............................................................................................................91

OSCILLOSCOPE CALIBRATION COMMANDS (OPTION) ............................................................................92

AC POWER CALIBRATION COMMANDS (OPTION) ................................................................................101

TECHNICAL DESCRIPTION..................................................................................................................104

GENERAL .........................................................................................................................................104

CONSTRUCTION................................................................................................................................105

INTERNAL FUSES ..............................................................................................................................106

OPENING THE CASE .........................................................................................................................107

ACCESS TO INTERNAL FUSES – TOP PCB..........................................................................................108

ACCESS TO INTERNAL FUSES – FRONT PANEL PCB...........................................................................109

POWER SUPPLY AND OUTPUT SWITCHING BOARD................................................................................110

PROCESSOR BOARD .........................................................................................................................110

MAIN ANALOGUE AMPLIFIER AND FEEDBACK BOARD ............................................................................111

HIGH VOLTAGE AMPLIFIER AND OUTPUT ............................................................................................112

CURRENT TRANSCONDUCTANCE AMPLIFIER.......................................................................................112

OUTPUT CURRENTS SENSING & SHUNTS...........................................................................................113

CALIBRATION TUTORIAL................................................................................................................114

GETTING THE BEST OUT OF THE CALIBRATOR. ....................................................................................114

CALIBRATION AND MAINTENANCE ..............................................................................................116

GENERAL .........................................................................................................................................116

ELECTRICAL SAFETY TESTS ..............................................................................................................116

CLEANING OF THE FAN DUCT ............................................................................................................117

CLEANING THE EXTERNAL CASE .........................................................................................................117

CALIBRATION....................................................................................................................................118

GUARANTEE AND SERVICE.................................................................................................................119

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3000A Series Calibrator Introduction

The 3000A series of calibrators offer the smallest and by far the most portable multi

product multi-function calibrator in the world. The 3000A series calibrator provides a

fully functioned precision programmable calibration source.

Main Features

 AC/DC Volts to 1025V

 AC/DC Current to 30 Amps (20Amps for 3050A)

 AC/DC Current to 1500 Amps with 50 Turn Clamp coil Adapter

 2 and 4 Wire Resistance to 1GΩ (10 MΩ for 3050A)

 Capacitance

 Inductance (Option)

 Logic Level Frequency

 Mark Space Ratio

 PT100 resistance Simulation (Option)

 RTD Simulation active (Option)

 Thermocouple Simulation (°C & °F)

 DDS Power / Harmonics (Internal Option)

 250/350/600MHz Oscilloscope Calibration (Internal Option)

 RS232 Serial Interface  GPIB (IEEE488) Interface Option

 Extendable Range Of Adaptors via the Adapter Interface

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Accuracy and Functionality

The 3000A Series calibrators are available in 3 accuracy grades, the 3010A basic

DC accuracy of 5ppm, the 3041A of 25ppm and the 3050A of 50ppm. The

appearance of the instruments is the same however the model type is indicated on

the front and rear panels and also shown on the display at switch on. The

calibrators are also available with reduced functions e.g. DC volts only etc.

True Multiproduct Calibration

From one instrument

Designed to provide an accurate cost effective portable instrument for the calibration

of multimeters, clamp meters, frequency meters, temperature meters, and

capacitance meters. Internal retro fit options allow the calibration of power meters,

oscilloscopes to 600MHz, inductance and LCR meters.

Designed for use in the laboratory or portable onsite calibration.

The 3000A series calibrator is suitable for use in the standards laboratory. The fast

warm up time combined with the small case and low weight make the 3000A series

calibrator also ideal for onsite calibration. The serial interface allows direct

connection to a PC/laptop.

Retro Fit Options

Allows additional functions to be added.

Several internal retro fit options including oscilloscope, power, inductance and PRT

allow the user to select the most cost effective solution for the calibration work with

the ability to add extra functions at a later date. External options for the calibration of

clamp meters, high accuracy thermocouple simulation with auto CJC (cold junction

compensation) built into the TC (thermocouple) connector, optical tachometers,

torque drivers etc. are also available via the front panel adapter interface.

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Serial Line RS232 Interface

Fitted as standard.

All functions and outputs of the series 3000A calibrator are fully programmable over

the RS232 interface. The use of the RS232 interface saves the cost of fitting GPIB

cards to the PC, and also allows easy connection to portable PC’s, reducing the set

up time for on-site calibration.

Output Connection

The output terminal configuration is designed to match the majority of multimeter

input connections, e.g. volts/ohms, low current and high current eliminating the need

for lead changing during calibration. All outputs are isolated when not in use and an

L.E.D. indicator shows the active output(s).

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Preparing The Calibrator For Use.

Initial inspection.

After shipment the calibrator should be inspected for any signs of external damage.

Should external damage be found contact the carrier immediately. Do not connect a

damaged instrument to the line power as this may result in internal damage. Please

retain the original packaging; this should be used when returning the calibrator for

service and recalibration.

Lifting and Carrying the Calibrator

The calibrator weighs 14.5kg with most of the weight at the right rear corner. The

calibrator can be carried by one person supporting the underneath (note: observe all

normal practices for health and safety when carrying). A custom carry case with

shoulder strap is available if the calibrator is to be regularly transported - see options

list. The calibrator should always be placed down on a firm flat surface on its base

feet. Avoid knocking or banging the calibrator and always place down smoothly.

Warning: DO NOT DROP THE CALIBRATOR

This may cause internal damage.

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Positioning the Calibrator.

The calibrator can be used free standing on a bench or mounted in a standard 19”

rack enclosure. The calibrator can be operated at any angle; the two front feet have

tilt legs for bench operation. For all installations care must be taken not to cover the

ventilation slots underneath or block the fan. A 2” (5cm) space behind the instrument

is also required for line and interface connections.

Minimum 2” (5cm) Clearance

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Rear Panel Connections and Controls

Connections on the rear panel are for Line Power via a 3 Pin IEC connector

incorporating the Line fuse and on-off switch; Note the mains inlet is filtered. A 9 Pin

Serial interface connector for the computer interface, this is optically isolated from

the calibrators output. On some models a third connector for the 10kV Extension

amplifier is also present.

Power Switch

Cooling Fan Vent (Keep Clear)

RS232 Connector

(COM Port)

Fuse Holder / Line Voltage Selector

Mains / Line Inlet (IEC) Connector

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Setting and checking the Line Voltage.

Warning: The line power cord must have an earth conductor to avoid risk of shock. This instrument must be correctly earthed.

The calibrator has been designed to work from either 100-120 Volt line supply or 200 - 240 Volt line supply. Check that the voltage selector is set at the correct voltage before connecting the power to the instrument. Connecting the calibrator to the wrong supply will cause internal damage to the instrument. To change the line voltage, remove the fuse / voltage selector housing, rotate through 180° and replace with the required voltage setting at the bottom of the housing indicated by the arrow, ensure that the correct fuse is fitted. The calibrator is set for 110V operation in the USA, 230V operation in the UK and Europe.

Power Line Inlet Fuse and rating

The power line inlet fuse is located directly below the power inlet within the voltage

selector housing. The correct fuse rating is 3.15A anti-surge for 230V operation and

5A anti-surge for 110V operation.

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Connecting to a computer

A standard serial 9 pin cable (supplied) should be used to connect the calibrator to a

COM port on the PC. A Null modem cable is not needed.

RS232 Interface

Connection

Configuration

Cable Type Male to Female Serial Cable

Driver N/A

BAUD RATE : 9600 PARITY : NONE DATA BITS : 8 STOP BITS : 1

Straight Though Pin Connection (Not Null MODEM)

Powering up the calibrator

After connecting line power, the calibrator can be switched on with the line power

switch above the mains inlet socket on the rear panel.

The fan will start and the front panel display will illuminate indicating power. The

display will show a firmware version number and after a short delay, during which

time the processor performs a self-test of the instrument, the display will show an

output of 0.00000mV DC. Allow the calibrator to warm up for 30 minutes to

obtain full accuracy; the fast start feature of the calibrator will give approx. 90% of

full specifications within 10 minutes. The calibrator has been designed to be

powered up continuously, automatically switching to a standby mode after a pre-set

period of time from the last command. In standby mode the display back light will

turn off.

The control program can now be started on the computer, the program will establish

communication with the calibrator at which time the calibrator will download the

values of the internal standards.

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Output Connections

Warning: Risk of shock. High voltages may be present on the output sockets.

Output sockets are all 4mm safety type, the voltage pair contacts are low thermal

gold plated for minimum thermal EMF.

The 3000A series calibrator’s outputs have been designed to allow most multimeters

to be calibrated without changing connections. There are 3 separate pairs of

outputs:

1) Voltage, Resistance, Capacitance, Frequency & Inductance

2) Current and 4 Wire Resistance

3) High 30A Current.

When an output terminal pair is not active they are completely open circuit and

isolated from the other outputs. As only one pair is active at a time on (except on 4

wire ohms) they may be combined together if required to match the meters input

arrangement.

One example is the configuration of multimeters inputs with a single common low

and inputs with voltage, low and high current. To match this to the calibrator, simply

connect the 3 low outputs of the calibrator together and connect the voltage, low &

high current outputs to the appropriate meters inputs. Note that when outputting

resistance, the calibrator will use the voltage output terminals.

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A second example is where the meter has separate voltage and current inputs, often

using four wire ohms on both pairs. In this case simply connect the voltage and

current outputs to the meter’s inputs, the calibrator will use both the voltage and

current pair on 4 wire ohms.

It is recommended that the voltage and low current leads be high quality screened

cable with gold plated 4mm plugs fitted. The cable must be able to withstand 1025

volts AC and have an insulation resistance greater than 1TΩ to avoid introducing

any shunting effect on the high resistance ranges.

Poor quality test leads will introduce noise, thermal e.m.f. and leakage errors on low

voltage & current ranges and also unstable readings on resistance and capacitance

outputs (see measurement techniques). Special test leads are available from

Transmille, see accessories.

Warning: Under no circumstances should any voltage be connected to the calibrator outputs

The low output can be connected to line earth or allowed to float as selected - see

operation section of this manual. It is recommended that the low is earthed which

will help to reduce noise on high ohms and low current. If allowed to float with

respect to line earth the low must remain within 50 volts of line earth. Outputs are

optically isolated from the RS232 interface

Output Overloads

If the calibrator is unable to drive the load then the output will be turned off and the

calibrator returned to standby mode. The message Standby will be displayed on

the front panel. The output will be automatically reset on setting the output again.

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Operation

Safety Warnings

WARNING: The information in this section is intended only for qualified personnel. The user must at all times be adequately protected from electric shock. Qualified personnel must ensure that operators of the equipment are adequately insulated from connection points.

WARNING: This instrument is capable of generating both DC and AC high voltages.

A soft carry-case and a hard transit case are available for regular transportation of the calibrator.

Introduction to Operation

All functions of the 3000A Series Calibrator can be controlled from the front panel, or

controlled remotely by a computer over the interface. The front panel controls are

‘locked out’, but local control may be resumed by selecting a soft key - it must be

remembered that this action may disrupt the computer program.

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Front Panel Controls and Indicators

Active Terminal LEDs

LCD Display with integral Backlight

Safety Output Terminals

Standby Button

Output On Button

Numeric Keypad

Menu buttons (Soft Keys)

Adapter Interface

Digital Control

Multiplier Keys

Function Keys

Front Panel Keyboard

The front panel of the 3000A Series Calibrator utilises a high quality custom rubber

keyboard with tactile feel buttons and integral display window. The front panel is

therefore sealed against the ingress of moisture and dirt enabling the calibrator to be

used in most working environments without risk of early failure of the operating

buttons. The front panel can easily be wiped clean with a soft cloth. Care should be

taken not scratch the display window. All graphics are ‘under printed’ making them

rugged and durable.

IMPORTANT NOTE The front panel key buttons are for use with fingers only - do not press the key with hard or sharp objects e.g. Ball-point pens, pencils, screwdrivers etc. Repeated actions like this will almost certainly cause the keyboard to fail. (This will not be covered under warranty). Care should also be taken when transporting the instrument, do not place test leads or other objects on top of the panel which may come into contact with the display area and cause damage.

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Front Panel Keyboard – Control Sections

The Keyboard is divided into sections to allow easy operation.

Numeric section

Allows numeric values to be entered

Multiplier section

Mega (M), kilo (k), milli (m), micro(u) or nano (n)

Function section

Volts (V), Amps(A), Ohms (2 & 4 Wire),

Farads(F), Celsius(C), & Frequency(Hz)

Range Up / Range Down

Allow the output to be multiplied / divided by 10.

Left / Right / Up / Down Arrow Keys

To select the digit to be controlled by the rotary control.

Output On / Standby keys

Allow the calibrators output to be disconnected from the

terminals. LED indicators are incorporated in these switches to

clearly show the output status.

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Graphic LCD Display

The graphic backlit LCD display shows the present output, instrument status, % or

ppm change from the entered value, and also the new value being entered. The

bottom portion of the display is used to assign the function of the four ‘soft (menu)

keys’. The display utilises a back light which automatically turns off if no activity

occurs either from the front panel keys or via a remote command.

Output Value &

Range

Dynamic

Soft key Menu

Lo to

Output On / Standby

Indicators

Deviation (ppm)

Function Specific

Configuration

Display

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Digital Control

A digital potentiometer allows the ‘highlighted digit’ on the display to be incremented

(turning clockwise) or decrement (turning anti-clockwise). As an output is changed

the deviation from the original value entered on the keyboard is shown in either % or

ppm.

Selected digit marker.

Cursor Keys can be used to move the position of the digit marker, and increment / decrement the digit.

Clockwise Rotation

(Increment Digit)

Anti-Clockwise Rotation

(Decrement Digit)

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Terminal status LED’s

LED’s above the terminals indicate which pair is active. When terminals are not

active they are electrically isolated from each other, this enables terminals to be

linked together if required.

Active terminals indicated by illuminated LED

Voltage Output Terminal Pair (Black & White)

WARNING: Dangerous voltage may be present on these terminals.

Low thermal 4mm safety terminals

Used for all voltage outputs up to 1025V, for 2 wire/4 wire resistance, capacitance

and inductance (optional). Note the low ‘black’ terminal can be internally switched to

line earth by a soft key function. When floating, the maximum voltage on this

terminal with respect to ground should not exceed 50 Volts peak.

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Current Output Terminals (Black & Red)

4mm safety terminals for all current outputs up to 2 Amps, TTL frequency and for

sense connection for 4 wire resistance.

Note the low ‘black’ terminal can be internally switched to line earth by a soft key

function. When floating, the maximum voltage on this terminal with respect to

ground should not exceed 50 Volts peak

30 Amps Output Terminals (Blue and Yellow)

4mm Safety terminals used for all currents above 2 Amps.

Earth Terminal (Green)

Connected directly to line earth and case. Incorporates green LED indication of negative to earth (grounded or floating) selection

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Scope & Freq/Trg BNC Connector Outputs

Isolated BNC sockets for frequency and oscilloscope function outputs. They

incorporate a green LED indicator to show when the terminal is active.

WARNING: Dangerous voltages up to 400V may be present on these terminals.

9 Pin Adapter Interface Connector.

Used for connection to external pods used for extending calibration capability, e.g.

Thermocouple simulation etc.

Adapter Interface 9 Way ‘D’ type connector (Female)

Incorporates a green LED to indicate when the adapter interface is active.

The pins connections are as follows:

Pin 1 – +15V Pin 2 – Digital ground Pin 3 – Strobe Pin 4 – Data Pin 5 – Select Pin 6 – -15V Pin 7 – Analogue ground Pin 8 – Output Pin 9 – Input

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Setting DC Voltage and Current Output

Complete the following procedure to set a dc voltage or current output.

Use the and (clear) keys to edit the entry.

1) Press

2) Press the numeric and decimal point keys to enter the required value, e.g. 12.345

3) Press the multiplier key (if required), e.g.

4) Press the function key e.g.

5) Press

6) Press to activate the calibrator output.

Key Digits

12.345

Press ‘m’

Multiplier

Press

Function Key

Select

Output On

The calibrator will now produce 12.345 mA D.C. at the appropriate terminals.

Once on a range, any new output within that range can be set without the calibrator

returning to standby. When a high voltage or high current values are entered the

calibrator will automatically go into standby mode. To output the voltage or current,

press the key. This safety feature stops the accidental selection of high

voltage or current.

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Adjusting the set output using the digital control

After the output has been set, any digit of the output display can be incremented or

decremented using either the digital control or the up and down arrow keys. The

digit selected is indicated by the cursor and can be changed by using the left and

right arrow keys.

Highlighted digit

Clockwise Rotation

(Increment Digit)

Anti-Clockwise Rotation

(Decrement Digit)

Up / Down

Cursor Buttons

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Automatic Display of % or ppm Error and Ref. Key

When the output value is changed by the methods above, the display will show the

change in ppm or % from the original reference value entered from the keyboard. If

needed, the reference value can be reset to the present value on the display by the

REF key.

This feature is ideal for displaying the error in a meter under test by adjusting the

output from the calibrator to make the meter read the nominal value.

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Setting AC Voltage and Current Output.

Complete the following procedure to set an ac voltage or current output.

Use the and (clear) keys to edit the entry.

1) Press

2) Press the numeric and decimal point keys to enter the required value, e.g. 16.789

3) Press the multiplier key (if required), e.g.

4) Press the function key e.g.

5) Press

6) Press the numeric and decimal point keys to enter the frequency value, e.g. 1000

7) Press the function key

8) Press to activate the calibrator output.

Select

Key in Voltage /

Current Value

Select

Multiplier

Select

Function

Set Frequency Followed by

Hz Key

Select

Output On

The display will show the frequency in the bottom right hand corner of the display.

For safety, AC/DC changes will maintain the set output value; the output will switch

off and then back on again. The frequency can be adjusted using the digital control.

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Returning the calibrator to DC

Complete the following procedure to return the output to DC:

1: Press

2: Press

Select DC

Key

Press

Enter

The display will indicate DC as shown above. The voltage or current setting will

remain as the previous setting.

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Setting 2 Wire Resistance Output.

Note: The calibrator uses standard resistors of fixed decade values. The nearest available resistance to the entered value will be automatically selected. Complete the following procedure to select 100kΩ in 2 wire mode.

1) Press the numeric keys to enter the required value, e.g. 100

2) Press the multiplier key (if required), e.g.

3) Press the function key e.g.

4) Press

5) Press

Key in

Resistance Value

Select

Multiplier

Select

Function

Press

Enter

Select

Output On

The resistance displayed will be the calibrated value held in the non-volatile

calibration memory for that standard. Note the values are different for two and four

wire ohms.

Nulling DMM

The calibrated values displayed for 2 wire ohms are the values present at the

terminals. Therefore the measuring instrument should be zeroed (Nulled) with the

leads shorted before connection to the calibrator.

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2 Wire Ohms Operation

Two wire ohms is output on the voltage terminals as indicated by the terminal LED’s.

2 Wire Ohms Connection

Connect the measuring instrument 2-Wire input to the calibrator 2-Wire resistance output. Use shielded connection cables – 50 Ohm co-axial recommended Connect Guard / Earth if required – see notes Select 2 Wire resistance measurement mode on meter

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Setting 2 Wire Simulated Resistance (Option)

The calibrator can simulate (Active) 2 wire resistance vales in the range of 0Ω to 10MΩ

1) From the resistance screen press the ACTIVE soft key

Active Ω

2) Press the numeric keys to enter the required value, e.g. 100

3) Press the function key e.g.

4) Press

5) Press

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Setting 4 Wire Resistance Output.

1) Press the numeric keys to enter the required value, e.g. 100

2) Press the multiplier key (if required), e.g.

3) Press

4) Followed by the shift-function

5) Press

6) Press

Key in

Resistance Value

Select

Multiplier

Shift Select

Function

Press

Enter

Select

Output On

The resistance displayed will be the calibrated value held in the non-volatile

calibration memory for that standard. Note the values are different for two and four

wire ohms. Four wire ohms is indicated on the terminal LED’s by both the voltage

and current terminal LEDs illuminating.

Nulling DMM

The calibrated values displayed for 4 wire ohms are the values referenced to the

calibrator’s zero position. Therefore, the measuring instrument should be zeroed

(Nulled) with all 4 leads (top leads sense, lower leads current) connected to the

calibrator with the zero ohms selected.

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4 Wire Ohms Operation

Four wire ohms is output on the voltage and current terminals as indicated by the

terminal LED’s. Connect the ‘sense’ from the DMM to the voltage output on the

calibrator, and connect the ‘current’ from the DMM to the calibrator current

terminals.

4 Wire Ohms Connection

Connect the measuring instrument 4-Wire input to the calibrator 4-Wire resistance output. Use low thermal leads and connections Connect Guard / Earth if required – see notes Select 4 Wire resistance measurement mode on meter

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Using Current Coils (Option)

The 3000A Calibrators can be used with the optional current coil EA002 (2, 10 and

50 turn coil). This enables currents both DC and AC of up to 1500A with the 3041A

and 3010A Calibrators and 1000A with the 3050A Calibrator to be produced for the

calibration of current clamp meters.

The current from the calibrator is connected the appropriate coil connections. The

current output from the calibrator is then multiplied by the number of turns in that coil

producing a higher current for the clamp to measure.

Complete the following procedure to select 500A DC using the 50 turn coil.

1) Press followed by and then to display the screen

below.

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2) Select COIL using the soft key to enter the screen shown

Number of turns

Use the arrow keys, left and right to place the highlighted box over the coil type required and then press SELECT

3) Press the numeric keys to enter the required value, e.g. 500

4) Press followed by to display screen below.

500A (50 turns x 10A)

50 turn coil selected

30A range output selected automatically as current output required >2A

5) Press

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Setting Capacitance Output.

Note: The calibrator uses standard capacitors of fixed values. The nearest available

capacitance to the entered value will be automatically selected. Complete the

following procedure to select 100nF.

1) Press the numeric keys to enter the required value, e.g. 100

2) Press the multiplier key (if required), e.g.

3) Press the function key e.g.

4) Press

5) Press

Key in

Capacitance Value

Shift Select

Multiplier

Select

Function

Press

Enter

Select

Output On

Capacitance is available at the voltage terminals as indicated by the LED.

The capacitance displayed will be the calibrated value held in the non-volatile

calibration memory for that standard. Note this is the value measured with a 1 kHz

sine wave on a LCR bridge. When measuring capacitance, Cp (parallel) should be

selected for values up to and including 1uF and Cs (series) for values above.

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Setting Inductance Output (Option)

Note: The calibrator uses standard inductors of fixed values. The nearest available

inductance to the entered value will be automatically selected. Complete the

following procedure to select 10mH.

1) Press the numeric keys to enter the required value, e.g. 10

2) Press the multiplier key (if required), e.g.

3) Press

4) Followed by the shift-function

5) Press

6) Press

Key in

Inductance Value

Select

Multiplier

Shift Select

Function

Press

Enter

Select

Output On

Inductance is available at the voltage terminals as indicated by the LED. The

inductance displayed will be the calibrated value held in the non-volatile calibration

memory for that standard.

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Thermocouple Simulation (Option).

Thermocouple Adapter Connection

Using the supplied adapter connection lead (9 way ‘D’ type to 9 way ‘D’ type),

connect the thermocouple adapter to the adapter interface connection on the front

panel of the 3000A series calibrator.

‘Neutral’ (Copper) Thermocouple Plug Connects To UUT

9 way ‘D’ to 9 way ‘D’ connection

Starting the Thermocouple Simulation Option

To start the thermocouple simulation option, press the soft key below the THERM menu item

Thermocouple Mode soft key

TIP

If the THERM menu item is not displayed, press the NEXT soft key to go to the next menu level.

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Thermocouple Simulation Option Operation

The thermocouple simulation option allows the user to enter a temperature in °C and

set the calibrator to the specific voltage output which corresponds to the

thermocouple type selected. On entering thermocouple simulation mode, type K will

be the default function. The display below will be shown indicating the currently

selected range and output status:

Output status (On / Standby)

Once in thermocouple mode, the menus available at the bottom of the screen will

change to reflect the thermocouple mode options - the available functions are:

Cold junction compensation type AutoCJ = Automatic ManualCJ = Manual

Cold junction compensation temperature

Thermocouple Type

Change thermocouple type soft key

Auto Cold junction soft key

Manual Cold junction soft key

Selects the manual cold junction compensation mode.

MAN CJ

Press the key and ‘Enter CJ Temp:’ appears on the display as shown.

Input the required value via the numeric keypad and press

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UTO CJ

Selects the automatic cold junction compensation mode

This allows the calibrator to use the built in temperature sensor within

the adapter’s thermocouple plug to compensate for the cold junction

measured between the adapter plug and the UUT socket.

TYPE Selects the thermocouple currently being simulated.

Press the key and the screen changes to the display below.

Use the arrow keys, up and down, left and right to place the

highlighted box over the thermocouple type required and then

press SELECT

Complete the following procedure to select K type simulation equivalent to 450°C

1) Connect the thermocouple simulation adapter to the 3000A Series calibrator via

its feature connector using the supplied 9 way ‘D’ type to 9 way ‘D’ type lead.

Connect the UUT to the thermocouple plug extending from the opposite end of the

thermocouple simulation adapter. Set the UUT to the required range.

2) Select the thermocouple type to be simulated as described above in this case K

type.

3) Select the cold junction compensation options using the soft keys, either

MAN CJ AUTO CJ

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4) Press the numeric keys to enter the required value, e.g. 450

5) Press the function key e.g.

6) Press

7) Press

Select

Output On

Key in

Temperature Value

Select

Function

Press

Enter

8) To change the temperature output from the nominal value, use the deviation

function. This is controlled by using the left and right arrow keys to select the digit

to be incremented.

Use the left right arrows to highlight the digit to be adjusted (indicated by the underlined digit)

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To increase or decrease the highlighted digit, use the up and down of the cursor keys or use the digital potentiometer.

Clockwise Rotation

(Increment Digit)

Anti-Clockwise Rotation

(Decrement Digit)

Up / Down

Cursor Buttons

Note: The thermocouple type, temperature and cold junction compensation settings

can be changed at any time by re-entering / selecting the setting required

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Special Functions Available using the ‘soft’ keys

The ‘soft’ keys are positioned directly under the display and the function of these

keys will change depending on the parameter of the calibrator. The calibrator’s

parameters can be accessed by scrolling through the menus by using the NEXT key

to go to the next level of functions and the EXIT key to return to the previous level.

Connecting Output Negative to line earth (ground)

The soft key switches the output negative terminal from floating to

ground (line earth). The ‘on’ condition is shown at the top left of the display and also

by the front panel LED.

We recommend that the default condition of output connected to ground is used as

this reduces noise and pick up and decreases the risk of damage to the calibrator by

incorrect connection.

Selecting front panel control

When the calibrator has been controlled from the interface, the front panel controls

are disabled. To regain front panel control use the LOCAL soft key

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Setting TTL Logic Frequency Output.

Note: The calibrator uses a precision Temperature Compensated Crystal Oscillator

(TCXO). Frequencies from 1Hz to 1MHz in 1Hz steps are available together with

the reference frequency of 10MHz.

1) Select FREQ using the soft key

2) Press the numeric keys to enter the required value, e.g. 123456

3) Press

4) Press

Frequency output from

FREQ/TRG BNC socket

To increase or decrease the highlighted digit, use the up and down of the cursor keys or use the digital potentiometer.

Clockwise Rotation

(Increase Frequency )

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Anti-Clockwise Rotation

(Decrease Frequency)

Up / Down

Cursor Buttons

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Setting RPM Output with EA003 Adaptor (Option)

Note: The calibrator uses a precision Temperature Compensated Crystal Oscillator

(TCXO). Using the EA003 Optical Tachometer Calibration Adaptor the RPM can be

set from 60 to 60000 RPM in 1 RPM steps.

1) Select RPM using the soft key

2) Press the numeric keys to enter the required value, e.g. 1000

3) Press

4) Press

To increase or decrease the highlighted digit, use the up and down of the cursor keys or use the digital potentiometer.

Clockwise Rotation

(Increase RPM )

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Anti-Clockwise Rotation

(Decrease RPM)

Up / Down

Cursor Buttons

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Setting PWM (Mark Space Ratio)

The calibrator can produce an accurate mark space ratio output within the frequency

range 100Hz to 10kHz. The width of the pulse can be adjusted from 1% to 99% in

1% steps.

1) Select PWM using the soft key

2) Press the numeric keys to enter the required value, e.g. 1000

3) Press to determine the frequency

4) Press PWM, use the numeric pad to enter the required %, e.g. 50

5) Press followed by

Pulse Width Modulated output from

FREQ/TRG BNC socket

To increase or decrease the highlighted digit, use the up and down of the cursor keys or use the digital potentiometer.

Clockwise Rotation

( Increase pulse width)

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Anti-Clockwise Rotation

(Decrease pulse width)

Up / Down

Cursor Buttons

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Selecting PRT (PT100) Resistance Output (Option)

The calibrator uses fixed value standard resistors. These resistors represent the following temperatures: -100°C, 0°C, 30°C, 60°C, 100°C, 200°C, 300°C and 800°C. The nearest available temperature to the entered value will be selected.

1) Select PRT using the soft key

2) Use up / down arrow keys or the rotary control to select the required temperature.

3) Press

4 Wire output is from the Voltage & Current terminals

oltage (Sense)

Current

Clockwise Rotation

(Next PRT Point)

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Anti-Clockwise Rotation

(Previous PRT Point)

Up / Down

Cursor Buttons

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Selecting Simulated PRT (RO) Output (Option)

The calibrator can simulate PRT temperature values for RTD types 25Ω,100Ω, 250Ω, 500Ω and 1000Ω in the range -200°C to 800°C

1) Select PRT using the soft key

2) Select RO using the soft key, the following screen appears

Use the arrow keys, up and down, left and right to place the highlighted box over the

RTD type required and then press SELECT

3) Select SIM PRT using the soft key to display the screen below

4) Press the numeric keys to enter the required value, e.g. 50

5) Press the function key e.g.

6) Press

7) Press

Simulated PRT – 2 wire output via voltage terminals

Voltage output terminals

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Select

Output On

Key in

Temperature Value

Select

Function

Press

Enter

To increase or decrease the highlighted digit, use the up and down of the cursor keys or use the digital potentiometer.

Clockwise Rotation

(Increase temperature)

Anti-Clockwise Rotation

(decrease temperature)

Up / Down

Cursor Buttons

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Selecting AC Power Calibration Output (Option)

The Calibrator can simulate power by simultaneously supplying AC voltage and AC

current with a phase relationship.

1) Select POWER using the soft key

Power Factor

Current Output

Phase

Frequency

Power

Change Phase Waveform type (voltage and current)

(3041A & 3010A Power DSS option)

2) Press the numeric keys to enter the required value (voltage), e.g. 10

3) Press and then press

4) Press the numeric keys to enter the required value (current) e.g. 10

5) Press and then press

6) Press the numeric keys to enter the required value (frequency) e.g. 60

7) Press and then press

Enter Voltage value

followed by VOLTS

Press ENTER

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Enter Current value

Followed by AMPS

Press ENTER

Enter Frequency value

Followed by Hz

Press ENTER

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Note: Current output in power mode follows the same convention as normal current operation –

Up to 2A is output from the low current terminals

2.02 – 30A (20A for 3050) output from the high current terminals

8) To change phase, select PHASE using the soft key

9) Press the numeric keys to enter the required value (voltage), e.g. 90

10) Press

Phase

For DDS Power Option ONLY

Select the voltage and current waveforms as follows:

11) Select V WAVE using the soft key and the screen below will appear

Use the arrow keys, up and down, left and right to place the highlighted box over the

waveform type required and then press SELECT

12) Select I WAVE using the soft key and the following screen will be displayed

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Use the arrow keys, up and down, left and right to place the highlighted box over the

waveform type required and then press SELECT

The CUSTOM waveform item is user programmable using the ProWave software

supplied with the calibrator. See the ProWave documentation for more details on

setting the custom waveform.

SINE SQUARE

      

TRIANGLE

RD 10%

TH 10%

1ST 10% USER&SINE USER WAVE

Use the Output On / Standby buttons to control the output

Note: When the hourglass is shown in the calibrator display, phase correction is in progress, and calibrator will not respond until completed and the hourglass disappears.

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Selecting DC Power Calibration Output (Option)

The calibrator can simulate DC power by simultaneously outputting DC voltage and

DC current.

Voltage display

Current display

To configure power calibration mode:

1) Select POWER using the soft key

2) Press the numeric keys to enter the required value (voltage), e.g. 10

3) Press and then press

4) Press the numeric keys to enter the required value (current) e.g. 10

5) Press and then press

6) Press

Enter Voltage value

Enter Current value

followed by VOLTS

Press ENTER

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Followed by AMPS

Press ENTER

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Selecting Oscilloscope Calibration Output (Option)

The calibrator provides Amplitude, Timebase and Bandwidth outputs for calibration

of oscilloscopes.

To configure oscilloscope calibration mode:

1) Select SCOPE using the soft key

2) Calibrator will select AMPLIT(UDE) mode.

Use the RANGE UP / RANGE DOWN buttons to change range.

Use the digital control to alter the

deviation (clockwise to increase,

anti-clockwise to decrease).

3) Use the RANGE UP or RANGE DOWN buttons to change range or

4) Select AMPLIT using the soft key and the following screen will appear

Use the arrow keys, up and down, left and right to place the highlighted box over the

amplitude range required and then press SELECT

To alter the deviation, use the up / down arrow buttons or digital control.

5) To select Timebase mode press soft key TIMEBASE

Use the digital control to alter the deviation (clockwise to increase, anti-clockwise to decrease).

Use the RANGE UP / RANGE DOWN buttons to change range.

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6) Use the RANGE UP or RANGE DOWN buttons to change range or

7) Select TIMEBASE using the soft key and the following screen will appear

Use the arrow keys, up and down, left and right to place the highlighted box over the amplitude range required and then press SELECT To alter the deviation, use the up / down arrow buttons or digital control.

8) For Bandwidth function use the BW REF soft key the following screen will appear.

50kHz reference output

is available.

9) To select Bandwidth Sweep mode use the BW SWEEP soft key.

Use the digital potentiometer to alter the output (clockwise to increase, anti-clockwise to decrease)

To select the highlighted digit, use the left/right arrow buttons. To change the output,

use the up / down arrow buttons or use the digital potentiometer.

Maximum frequency available depends on option fitted:

a) 250MHz (Option SCP250 – 3050A Calibrator)

b) 350MHz (Option SCP350 – 3041A and 3010A Calibrators)

c) 600MHz (Option SCP600 – 3041A and 3010A Calibrators)

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10) To select Fast Rise mode use the FAST RISE soft key.

Calibrate

The calibrator can be calibrated via the front panel; further details of this function are

detailed in the service manual. To access to the calibration menu press the

CALIBRATE soft key and enter the password.

Enter password

Setup (Beeper / Password / Adapters)

Enter the setup menu by press the SETUP soft key, the following screen will appear.

Beeper on or off

Password

Configure Adaptors

Beeper screen, choose

On or Off using the left

& right arrow keys, then

press SELECT

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The PASSWORD function is outlined in the service manual and ADAPTORS function is detailed in the appropriate manual for each adaptor.

Info

Enter the setup menu by press the INFO soft key, the following screen will appear.

Firmware version

Model type

Instrument Serial No.

Options fitted

The info(rmation) screen shows the Calibrator type, Firmware version, Serial number and Options fitted (this will vary depending on the model and additional features).

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Warning and output Overload indications.

The self-test function of the 3000A series calibrator continuously monitors the output

of the calibrator for overload or fault conditions.

In the event of the calibrator not being able to drive the load, it will automatically trip

into standby and the display will show Standby. The ‘standby’ condition is caused

by the required drive current being too high on a voltage range or the required

compliance voltage being too high on a current range. The output can be restored

by pressing the Output On key after the load has been corrected.

High Voltage Timeout.

As an additional safety feature, the calibrator will automatically return to standby if

left on the 200V or 1kV ranges after a set time period. This is 20 minutes for DC and

AC frequencies of less than 5 kHz or 3 minutes for frequencies of 5 kHz and greater.

30 Amp Temperature Cut-out

The 3000A Series calibrators are capable of supplying high currents for a sustained

periods up to 30A (20A for 3050A) – above this value the calibrator will enter a

standby / cool-down period after a set amount of time depending on the output set.

The output amplifier operating temperature is monitored by the micro controller

which will shut down the output if required. The time before shut down occurs will

vary depending on the set output current and the load - see extended specifications.

During this shutdown period, the calibrator will be set to standby with a warning

message shown on the display Standby. It is safe to reselect the output at any time

as the microprocessor will automatically protect the output amplifier from damage.

Output to standby

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Interface Types

Connection to the 3000A Series calibrators is achieved by the following interfaces:

 RS232

9 Way ‘D’ type female connections

 USB (included)

USB connection using COM to USB conversion using supplied adapter.

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RS232 Interface

The calibrator can be fully controlled and calibrated via the bi-directional RS232

interface. The interface uses the standard 9 pin PC connector (or USB adaptor) and

a standard serial lead. The interface is optically isolated from the calibrator circuitry.

Baud rate is fixed at 9600 baud, no parity and one stop bit which allows a complete

output command to be sent in less than 20ms. The calibrator can send information

with reference to the output status, calibration factors and value of internal

standards together with other information. The internal processor decodes the

commands and returns control codes to verify the correct operation of that

command.

The calibrator can be sent individual commands directly from a Windows HYPER

TERMINAL program, any basic or high level program, the virtual front panel (VFP)

program, or from the ProCal Calibration System.

Configuring the COM port

To allow communication from PC based programs, these programs must be

configured to the following settings:

BAUD RATE : 9600

PARITY : NONE

DATA BITS : 8

STOP BITS : 1

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The 3000A series Virtual Front Panel software (optional) from Transmille comes pre-

configured with these settings, however if you are using another program these

settings will need to be verified before proceeding to control the 3000A Series

calibrators.

The RS232 connection is made using a straight-through type cable - this is supplied

as standard with all 3000A Series calibrators.

DO NOT USE A NULL MODEM TYPE CABLE AS PINS 2 & 3 ARE REVERSED

AND THE CALIBRATOR WILL NOT RESPOND TO COMMANDS

Connect the RS232 Interface from the 9 Way ‘D’ type connector on the

rear of the PC to the 9 Way ‘D’ type connector on the 3000A Series

calibrator.

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USB Interface

By using an RS232 to USB converter, the 3000A Series calibrators

can be connected to the host PC via the USB port. This option will be

provided as an additional compact unit and software driver.

The RS232 to USB converter will simulate a normal COM port (the

next available free COM port number, usually COM3 upwards) - this is

especially useful for Laptop/Notebooks, where the traditional RS232

COM port has been replaced by one or more USB ports.

Connect the USB Interface from the USB type connector on the

rear of the PC to the 9 Way ‘D’ type connector on the 3000A

Series calibrator via the RS232 to USB converter.

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Remote Programming

WARNING

The 3000A series calibrators can produce high voltages up to 1025V and must be programmed with due caution to prevent dangerous voltages from being present at the output terminals without warning to the operator.

Any programs should be extensively tested to maintain safe operation and include safeguard’s such as error catchments and handling to ensure that any commands sent to the calibrator perform as expected and any that do not are safely handled to ensure user safety.

Within the 3000A series command language, response codes are included to determine the operational state of the calibrator. These response codes can also be used to determine whether a command was received correctly and thus ensuring safe operation of the calibrator.

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Programming Commands Overview

The 3000A Series calibrators are controlled by a set of simple high level commands

which can be used either individually or as part of a command sequence.

The commands can be joined together using the / (forward slash) character.

The required terminator for the commands to be detected by the calibrator is a

carriage return (ASCII character 13) and should be the last character sent on a

command line.

For Example:

Command1/Command2 <CR>

Where each command is represented as Commandx

(x being the command number)

and the carriage return (ASCII character 13) is represented by <CR>

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RESPONSE CODES

The 3000A Series calibrators will respond to any command with a fixed code beginning with an star (*) - the codes are listed below

Response Code Description

*0 OK *1 ERROR IN COMMAND LINE *2 ERROR IN RANGE COMMAND *3 ERROR IN FREQUENCY COMMAND *4 ERROR IN O/P COMMAND *5 ERROR IN CAL FACTOR SENT *6 ERROR IN CAL FACTOR COMPARE *7 COMMAND OUT OF RANGE ( A1,A2 ETC ) OR

PASSWORD NOT SET *8 30A/HV TIMEOUT or OVER TEMPERATURE *9 OUTPUT ERROR

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DC Voltage Commands

Function Range Command

DC Voltage 200mV R1 2V R2 20V R3 200V R4 1000V R5

Standby Mode

Standby ON S1

Standby OFF S0

Output

Set Output O (not zero)

The DC voltage section consists of a set of range commands which are used in

conjunction with the standby and output command. To enable a DC Voltage to be

set and an output assigned, the following command sequence should be used:

For example, to assign 2V D.C. with the output switched on, the command is:

R2/O2/S0<CR>

R2 = 2V Range (as detailed in the table above)

O2 = 2V Output

S0 = Standby OFF (i.e. output switched ON)

<CR> = Carriage Return (ASCII character 13)

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Additional examples

150mV DC R1/O150/S0<CR> (sets 150mV output on the 200mV range)

22V DC R3/O22/S0<CR> (sets 22V output on the 200V range)

If a command includes a value which cannot be set due to, for example, the value

being higher than the range maximum, the calibrator will reject the command and

stay set as it is (the calibrator will also beep to signify a rejected command)

The calibrator will respond to the commands sent with the response codes as

detailed at the beginning of this section. These codes can be used to ensure that

hazardous output conditions are clearly indicated to the operator and to maintain

control of these outputs. This allows the calibrator to be returned to a safe state

once the testing required has been completed (e.g. setting the calibrator back to

standby once a test is complete and ensuring this has been successfully achieved

and no hazardous outputs remain on the terminals).

This functionality is employed within the ProCal calibration software from Transmille

to allow safe operation of the calibrator and to ensure the calibrator is returned to a

safe state in between test points and at the completion of a test sequence.

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AC Voltage Commands

Function Range Command

AC Voltage 200mV R12 2V R13 20V R14 200V R15 1000V R16

Standby Mode

Standby ON S1

Standby OFF S0

Output

Set Output O (not zero)

AC Frequency

Fxxxxx E.G. 10kHz = F10000

The AC voltage section consists of a set of range commands which are used in

conjunction with the standby and output command. To enable an AC Voltage to be

set and an output assigned, the following command sequence should be used :

For example, to get 2V @ 200Hz AC with the output switched on, the command is:

R2/O2/F200/S0<CR>

R2 = 2V Range (as detailed in the table above)

O2 = 2V Output

F200 = 200Hz Frequency

S0 = Standby OFF (i.e. output switched ON)

<CR> = Carriage Return (ASCII character 13)

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Additional examples

135mV @ 10kHz AC R1/O135/F10000/S0<CR>

(sets 135mV @ 10kHz output on the 200mV range)

255V @ 15kHz AC R3/O255/F15000/S0<CR>

(sets 255V @ 15kHz output on the 1000V range)

If a command includes a value which cannot be set due to, for example, the value

being higher than the range maximum, the calibrator will reject the command and

stay set as it is (the calibrator will also beep to signify a rejected command)

The calibrator will respond to the commands sent with the response codes as

detailed at the beginning of this section. These codes can be used to ensure that

hazardous output conditions are clearly indicated to the operator and to maintain

control of these outputs. This allows the calibrator to be returned to a safe state

once the testing required has been completed (e.g. Setting the calibrator back to

standby once a test is complete and ensuring this has been successfully achieved

and no hazardous outputs remain on the terminals).

This functionality is employed within the ProCal calibration software from Transmille

to allow safe operation of the calibrator and to ensure the calibrator is returned to a

safe state in between test points and at the completion of a test sequence.

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DC Current Commands

Function Range Command

DC Current 200uA R6 2mA R7 20mA R8 200mA R9 2A R10 20A R11

Standby Mode

Standby ON S1

Standby OFF S0

Output

Set Output O (not zero)

The DC current section consists of a set of range commands which are used in

conjunction with the standby and output command. To enable a DC current to be set

and an output assigned, the following command sequence should be used :

For example, to get 20mA DC with the output switched on, the command is :

R8/O20/S0<CR>

R8 = 20mA Range (as detailed in the table above)

O2 = 20mA Output

S0 = Standby OFF (i.e. output switched ON)

<CR> = Carriage Return (ASCII character 13)

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Additional examples

25mA DC R9/O25/S0<CR> (sets 25mA output on the 200mA range)

12A DC R11/O12/S0<CR> (sets 12A output on the 20A range)