Omega CL3001 User Manual

Download

NORWALK, CT

e-mail: info@omega.com

For latest product manuals:

www.omegamanual.info

Shop online at

omega.com

User’s Guide

CL3001

Lab Calibrator

The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it contains, and reserves the right to alter specifications without notice.

omega.com info@omega.com

Servicing North America:

U.S.A. Omega Engineering, Inc. Headquarters: Toll-Free: 1-800-826-6342 (USA & Canada only)

Customer Service: 1-800-622-2378 (USA & Canada only) Engineering Service: 1-800-872-9436 (USA & Canada only) Tel: (203) 359-1660 Fax: (203) 359-7700 e-mail: info@omega.com

For Other Locations Visit omega.com/worldwide

3001 Operator’s Manual

1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.1 Customer Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.2 Standard Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.3 Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.4 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.5 Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

2. Calibrator Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

2.1 Front Panel Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

2.2 Primary Input/Output Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

2.3 Primary Input/Output Display and Controls . . . . . . . . . . . . . . . . . . . . . .6

2.4 Isolated Input Display, Controls, and Terminals . . . . . . . . . . . . . . . . . .10

2.5 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

2.6 Display Layouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

2.7 Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

3. Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

4. Primary Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

4.1 DC Voltage Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

4.2 DC Current Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

4.3 Resistance Temperature Detector (RTD) and Ohms Measure . . . . . . .19

4.4 Resistance Temperature Detector (RTD) and Ohms Source . . . . . . . . .20

4.5 Resistance Temperature Detector (RTD) with Custom Coefficients . . .22

4.6 Standard Platinum Resistance Thermometer (SPRT) Coefficients . . . . .24

4.7 Thermocouple (T/C) Measure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

4.8 Thermocouple (TC) Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

4.9 Pressure Measure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

5. Isolated Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

5.1 Voltage Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

5.2 Current Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

5.3 Pressure Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

6. Output Setpoints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

7. Application Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

7.1 P/I Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

7.2 I/P Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

7.3 V/I Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

7.4 RTD Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

7.5 RTD Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

7.6 Thermocouple Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

7.7 Thermocouple Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

7.8 RTD Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

7.9 Precision Current Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

7.10 I/I Isolator/Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

7.11 Precision Temperature Measurement with IBP-2 Probe . . . . . . . . . . .40

8. LCD and Remote Interface Setup Procedures . . . . . . . . . . . . . . . .41

9. Remote Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

9.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

9.2 Setting up the RS-232 Port for Remote Control . . . . . . . . . . . . . . . . . .42

9.3 Setting up the IEEE-488 Port for Remote Control . . . . . . . . . . . . . . . . .43

9.4 Changing Between Local and Remote Operation . . . . . . . . . . . . . . . .44

9.5 IEEE-488 Interface Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

9.6 Using Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

9.7 Checking 3001 Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

10. Remote Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

10.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

10.2 Command Summary by Function . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

10.3 Error Code Listing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

10.4 Remote Command Listing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

11. Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86

11.1 Cleaning the Calibrator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86

11.2 Replacing a Line Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86

11.3 Changing the Line Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87

12. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88

12.1 General Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88

12.2 DC Voltage Specifications, Output . . . . . . . . . . . . . . . . . . . . . . . . . . .89

12.3 DC Voltage Specifications, Isolated Input . . . . . . . . . . . . . . . . . . . . . .89

12.4 DC Current Specifications, Output . . . . . . . . . . . . . . . . . . . . . . . . . . .89

12.5 DC Current Specifications, Isolated Input . . . . . . . . . . . . . . . . . . . . . .90

12.6 Resistance Specifications, Output . . . . . . . . . . . . . . . . . . . . . . . . . . .90

12.7 Resistance Specifications, Input . . . . . . . . . . . . . . . . . . . . . . . . . . . .90

12.8 Thermocouple Specification, Output and Input . . . . . . . . . . . . . . . . .91

12.9 RTD and Thermistor Specification, Output . . . . . . . . . . . . . . . . . . . . .93

12.10 RTD and Thermistor Specification, Input . . . . . . . . . . . . . . . . . . . . .95

12.11 Pressure Measurement Specifications . . . . . . . . . . . . . . . . . . . . . . .97

13. Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98

1. Introduction

The OMEGA CL3001 calibrator is an accurate full-featured temperature, pressure and DC calibrator intended for R & D, manufacturing and calibration lab applications. The unit's simple design and ease of operation allow users to quickly familiarize themselves with its operations and features. Time saving functions like the ability to save, recall and automatically cycle through setpoints for each output range, the ability to enter user definable RTD curves, and a complete remote interface are several key features offered by the CL3001.

1.1 Customer Service

OMEGA Engineering

Tel: (203) 359-1660

Fax: (203) 359-7900

www.omega.com

email: info@omega.com

1.2 Standard Equipment

• Power cord

• Thermocouple shorting jumper

1.3 Options and Accessories

4 Wire PT100 RTD probe: P-M-1/10-1/8- 6 -0-P-3

Traceable certificate of calibration for RTD: Cal-3-RTD

Thermocouple extension cables: male mini connector to spade lug,

length is 2 ft. CL-300-CABLE-(*)-2 * Insert one thermocouple for CL-300-CABLE: J,K,T,E,R,S,B,N

Test leads: Black.red set, banana plug to banana plug [1 m L(3')]

TAC-CAB

1.4 Unpacking

Upon receipt of the shipment, inspect the container and equipment for any signs of damage. Take particular note of any evidence of rough handling in transit. Immediately report any damage to the shipping agent.

NOTE: The carrier will not honor any claims unless all shipping material is saved for their examination.

After examining and removing the contents, save the packing material and carton in the event that re-shipment is necessary.

Remove the Packing List and verify that all of the listed equipment has been received. If there are any questions about the shipment, please call OMEGA at 800-872-9436.

Check to see if your basic calibrator package is complete. It should include:

• CL3001 Calibrator

• Instruction Manual

• AC Line Cord

• Thermocouple Shorting Jumper

• Certified Certificate

1.5 Safety Information

Symbols Used

The following table lists the International Electrical Symbols. Some or all of these symbols may be used on the instrument or in this manual.

Symbol Description

AC (Alternating Current)

AC-DC

Battery

CE Complies with European Union Directives

Double Insulated

Electric Shock

Fuse

PE Ground

Hot Surface (Burn Hazard)

Read the User’s Manual (Important Information)

Off

The following definitions apply to the terms "Warning" and "Caution".

• " Warning" identifies conditions and actions that may pose hazards to the user.

• " Caution" identifies conditions and actions that may damage the instrument being used.

Use the calibrator only as specified in this manual, otherwise personal injury and/or damage to the calibrator may occur.

Warning

To avoid possible electric shock or personal injury:

• Do not apply more than the rated voltage between the terminals, or

between any terminal and chassis ground. See specifications for supported ranges.

• Follow all equipment safety procedures.

• Always use the power cord and connector suitable for the voltage

and outlet of the location in which you are working.

• Do not use the calibrator if it is damaged. Before you use the

calibrator, inspect the case. Look for cracks or missing plastic. Pay particular attention to the insulation surrounding the connectors.

• Inspect the test leads for damaged insulation or exposed metal.

Check test lead continuity. Replace damaged test leads before you use the calibrator.

• Never operate the calibrator with the cover removed or the case

open, and never remove the cover or open the case without first disconnecting the power source and all test leads.

• Select the proper function and range for your measurement.

• Never touch the probe to a voltage source when the test leads are

plugged into the current terminals.

• When using the probes, keep your fingers away from the probe

contacts. Keep your fingers behind the finger guards on the probes.

• Connect the common test lead before you connect the live test lead. When you disconnect test leads, disconnect the live test lead first.

• Do not use the calibrator if it operates abnormally. Protection may be impaired. When in doubt, have the calibrator serviced.

• Do not operate the calibrator around explosive gas, vapor, or dust.

• When using a pressure module, make sure the process pressure line is shut off and depressurized before you connect it, or disconnect, it from the pressure module.

• Disconnect test leads before changing to another measure or source function.

• Have the calibrator serviced only by qualified personnel, and use only specified replacement parts.

• Use only the replacement fuse(s) specified in this manual.

• To avoid a violent release of pressure in a pressurized system, shut off the valve and slowly bleed off the pressure before you attach the pressure module to the pressure line.

Caution

To avoid possible damage to the calibrator or to the equipment

under test:

• Use the proper terminals, function, and range for your measurement or sourcing application.

• To avoid mechanically damaging the pressure module, never apply more than 10 ft-lb of torque between the pressure module fittings, or between the fittings and the body of the module.

• To avoid damaging the pressure module from overpressure, never apply pressure above the rated maximum printed on the module.

• To avoid damaging the pressure module from corrosion, use it only with specified materials. Refer to the pressure module documentation for material compatibility.

Make sure to remove all test connections before powering up the CL3001. Failure to do so could lead to damage of the CL3001 or the unit under test.

2. Calibrator Description

2.1 Front Panel Overview

Figure 1 shows the overall layout of the front panel. Each of the three major divisions is described in detail in the following sections.

Figure 1 - Front Panel

Item Name Description

1 Primary input/output terminals See section 2.2 for details

2 Primary input/output display

and controls See section 2.3 for details

3 Isolated input display, controls,

and terminals See section 2.4 for details

2.2 Primary Input/Output Terminals

Figure 2 describes the primary input/output terminals in detail. The display and controls for these terminals are described in the next section.

Figure 2 - Primary Input/Output Terminals

Item Name Description

1 VOLTS DC voltage output terminals.

See notes 1 and 2 below.

2 mA DC current output terminals.

See notes 1 and 2 below.

3 RTD/O OUTPUT Two wire RTD and Ohms output terminals.

See notes 1 and 2 below.

4 TC INPUT/OUTPUT Thermocouple input and output terminals.

These terminals accept a miniature polarized thermocouple plug with flat in-line blades spaced 7.9 mm (0.312 in.) center to center.

5 4W RTD/O INPUT Four wire RTD and Ohms input terminals.

See notes 1 and 3 below.

6 Pressure module input connector.

Note 1: These terminal binding posts are made of a special copper alloy

to reduce thermal EMF's. They support the use of either discreet wires or standard banana plugs, and the HI/LO pairs are spaced for standard dual banana plugs.

Note 2: Caution. Do not exceed a maximum of 100 volts to chassis ground.

Note 3: Caution. Do not exceed a maximum of 20 volts to chassis ground.

2.3 Primary Input/Output Display and Controls

Figure 3 describes the primary input/output display and controls in detail.

Figure 3 - Primary Input/Output Display and Controls

Item Name Description

1 Display A 2 line, 16 character, display

providing all visual user feedback for the primary output and input operations.See section 2.6 for layout details, and section 2.7 for possible error messages.

2 Numeric and secondary Output value data entry keys.

function keys Secondary function selection

per the text printed above the

numeric key. Press the key followed by the numeric key to select the function.

OUTPUT Change RTD/Ohms or

Thermocouple to output mode.

INPUT Change RTD/Ohms or

Thermocouple to input mode.

ZERO Zero the input for Pressure,

Thermocouple millivolts, or RTD ohms

SETUP Adjust the LCD Contrast, LCD

Backlight, and Remote Interface Configuration as described in section 8.

CJC Select internal or external cold

junction compensation for Thermocouple temperature measurements. When external compensation is selected, XCJC is displayed at the start of the second line.

°C/°F Select Centigrade or Fahrenheit

units for RTD and Thermocouple temperature measurements.

SET Set a new value for a preset output

setpoint as described in section 6.

RECALL Recall a preset output setpoint as

described in section 6.

AUTOSET Initiate automatic stepping of preset

output setpoints as described in section 6.

RNG LOCK Select Auto-range or Range Lock for

voltage output.

LOCAL Press to regain local control of the

CL3001 after the remote command REMOTE has been received; in this case all keys except this one are ignored. When the remote command LOCKOUT has been received, all keys are ignored including this one and the remote command LOCAL must be received to regain local control.

EXP Press during entry of a RTD custom

curve coefficient to begin entering the exponent.

3 Function keys

Select DC voltage or current output mode, and toggle between them.

Select Thermocouple or RTD/Ohms input/output mode, and toggle between them.

Select Pressure input mode.

In Thermocouple mode, cycle through the thermocouple types, including millivolts.In RTD/Ohms mode, cycle through the RTD types, including ohmsIn Pressure mode, cycle through the pressure units.

For all output modes, except Thermocouple, toggle between Standby and Operate modes.In Standby mode, any change to the output value in the display is not driven to the terminals until the Operate mode is selected.In Operate mode, each change to the output value in the display is driven to the terminals immediately, except for DC voltages greater then 30V when the mode reverts to Standby automatically for safety reasons.

Changes the calibrator output or parameter to the numeric value typed into the keypad.

Clears a partial keypad entry and reverts the calibrator output or parameter to its last known value.

Prepares for selection of a secondary function via the numeric keypad according to the text above each key. The display changes to SHIFT ENABLED until a numeric key is pressed. To cancel the selection

press again.

4 Cursor controls Press or to position the

cursor under the digit in an output value that is to be incremented or

decremented.Press to increment the digit in the output value where the cursor is positioned.

Press to decrement the digit in the output value where the cursor is positioned.

The and keys are also used to adjust LCD Contrast level, LCD Backlight level, and Remote Interface Configuration selections as described in section 8.

2.4 Isolated Input Display, Controls, and Terminals

Figure 4 describes the isolated input display, controls, and terminals in detail.

Figure 4 - Isolated Input Display, Controls, and Terminals

Item Name Description

1 Display A 2 line, 16 character, display

providing all visual user feedback for the isolated input operations. See section 2.6 for layout details, and section 2.7 for possible error messages.

2 Function keys

Select DC voltage and current input mode. Subsequent presses of this key cycle through the ranges: 10V, 100V, and 50mA.

When using 50mA mode to test a 2 wire loop powered transmitter that is disconnected from its wiring, press this key to activate an internal 24V power supply in series with the current measuring circuit. Press the key again to deactivate the 24V supply.

When using 50mA mode to test a HART configuration device, press this key to activate an internal 250 ohm resistor in series. Press the key again to deactivate the

resistor.Note that activating this resistor drops the maximum load driving capability from 1000 ohms at 20mA to 750 ohms at 20mA.

Select Pressure input mode. Subsequent presses of this key cycle through the pressure units.Pressure input mode uses the pressure module connector on the primary input/output side. Both sides may be selected to pressure mode simultaneously and can be set to display the same pressure measurement in different units if desired.

3 Input Terminals Common input terminals for DC

voltage and current. See notes 1 and 2 below.

Note 1: These terminal binding posts are made of a special copper alloy

to reduce thermal EMF's. They support the use of either discreet wires or standard banana plugs, and the HI/LO pairs are spaced for standard dual banana plugs.

Note 2: Caution. Do not exceed a maximum of 100 volts to chassis ground.

2.5 Rear Panel

Figure 5 describes the rear panel layout.

Figure 5 - Rear Panel

Item Description

1 RS-232 9 pin connector for remote control of the CL3001 via any

computer's serial interface.

2 GPIB IEEE 488.2 connector for remote control of the CL3001 via a

GPIB bus.

3 Service port for updating the CL3001 firmware.

4 Chassis ground terminal internally connected to the ground prong

of the AC power inlet.

Warning To avoid shock hazard, connect the factory supplied

3 conductor power cord to a properly grounded power outlet. Do not use a 2 conductor adapter or extension cord as this will break the protective ground. Use the chassis ground terminal for a protective ground wire if there is any question about the grounding through the 3 conductor power cord.

5 Standard IEC AC power inlet for 120/240 VAC.

6 Main power on/off switch.

7 Power line voltage selector and fuse compartment. See section 11

for instructions on changing the line voltage selector and changing fuses.

Warning To prevent electrical shock, only remove the line

voltage selector and fuse holder when the power cord is removed.

2.6 Display Layouts

a) Primary Voltage and Current Display

Figure 6 - Primary Voltage and Current Display Layout

Item Description

1 Operating mode:

AUTO: Auto-range LOCK: Range lock rem remote operation SP# Automatic stepping of preset setpoints

2 Present range and output mode

3 Output state:

Stby Standby, terminals inactive Opr Operating, terminals are active with output per

the displayed value

4 Output value

5 Units

b) Primary Thermocouple and RTD Display

Figure 7 - Primary Thermocouple and RTD Display Layout

Item Description

1 Output mode selection: RTD, TC, or rem for remote operation

2 Input or output selection

3 RTD or thermocouple type selection

4 Output state for RTD outputs:

Stby Standby, terminals inactive Opr Operating, terminals are active with output per

the displayed value Blank for RTD inputs Cold junction selection for thermocouple inputs and outputs:

XCJC External cold junction compensation; the CL3001

automatic cold junction compensation is turned

off, i.e. 0 mV is always 0°C

Blank Internal cold junction compensation; the CL3001

automatically measures the ambient temperature

at the thermocouple terminals and compensates

the measurement, i.e. 0 mV is ambient

temperature

5 Input or output value

6 Units

c) Primary and Isolated Pressure Display

Figure 8 - Primary and Isolated Pressure Display Layout

Item Description

1 UnitsOn the primary display, rem appears to the left during remote

operation

2 Input value

d) Isolated Voltage and Current Display

Figure 9 - Isolated Voltage and Current Display Layout

Item Description

1 Selected range and input mode:·

• 10V RANGE or 100V RANGE for DC voltage·

• 50mA RANGE for basic DC current·

• 24mA LPWR for loop powered 2 wire transmitter·

• 24mA LPWR HART for loop powered 2 wire transmitter with 250 ohm resistor in circuit

2 Input value

3 Units

2.7 Error Messages

The following error messages may appear on either display.

Table 1 - Error Messages

Message Description

OVER RANGE The value entered on the numeric keypad exceeds the

range of the output mode selected.

OVER LOAD For DC voltage output mode, the current required to

generate the output exceeds the CL3001 specifications.For DC current mode, the resistance of the circuit exceeds the CL3001 specifications.

OL For input modes, the measured value exceeds the

upper limit of the selected input mode range.For output modes, when the range is locked, the present automatically recalled preset setpoint exceeds the upper limit of the locked range. The output is set to zero for the duration of this setpoint.

-OL For input modes, the measured value exceeds the lower limit of the selected input mode range.

3. Getting Started

After unpacking the CL3001 and becoming familiar with the layout and general operation of the unit as described in the previous section, it is ready to set up for operation.

The following steps should be followed to set up the CL3001 for operation:

a) Before attaching the power cord to the rear connector, check

that the line voltage selector is set appropriately for your location. The CL3001 is shipped from the factory with the line voltage set for the country of purchase. To verify the line voltage setting, check the indicator on the power line voltage selector and fuse compartment cover; see figure 5 in section 2.5 for the location.

Confirm that the setting is correct according to the following guidelines:

Line Voltage (50/60Hz) Selector Position

90 to 135 VAC 120 VAC position

220 to 250 VAC 240 VAC position

If the setting is not correct, follow the instructions in section 11.3 to change it.

b) Once the voltage selection has been made, making sure that the

power switch is off, connect the AC power cord to the CL3001; see figure 5 in section 2.5 for the location.

c) Turn on the CL3001 using the rear panel mounted rocker switch.

The CL3001 should power up within a few seconds, briefly displaying the model number and firmware version in the primary display before reverting to the normal input/output display.

NOTE: If a proper power up display does not occur within 30 seconds, turn the power off, wait a few seconds, and repower the unit. If the problem persists, report the problem to Omega immediately.

Warm up time is twice the time since last warmed up, to a maximum of 30 minutes. For good stability it is best to leave the CL3001 on all the time.

4. Primary Inputs and Outputs

4.1 DC Voltage Output

The CL3001 can source DC voltages from 0 V to 100 V, using the following four ranges for maximum accuracy: .1 V, 1 V, 10 V, and 100 V.

a) Disconnect any test leads from external devices.

b) Press the key to select DC voltage and current mode, if

not already selected. If DC current mode is displayed, press the key again to cycle to DC voltage mode.

c) Connect the unit under test to the voltage output terminals of the

CL3001 as shown in figure 10.

Figure 10 - DC Voltage Output Connection

d) Use the numeric keypad to enter the desired output value and

press the key.

Alternatively, use the or cursor key to select a digit to

modify, followed by the or cursor key to ramp the digit up or down. This method offers a simple solution when small changes to an output value are required, or if specific decades need to be incremented or decremented.

e) When DC voltage mode is first selected, the CL3001 is placed in

the standby (Stby) mode which puts the positive (+) output jack into a high impedance state (>100k ohm) for safety. To place

the output into the active state, press the key which toggles between the standby and operate modes.

The standby mode is also activated in the following situations:

• If a fault occurs during operation, such as an overload or short circuit condition.

• As a safety feature for all new outputs over 30 VDC. Refer to the product specification section of this manual for maximum drive currents.

• Warning. Scrolling the output when the output value is already over 30V will not place the CL3001 in standby mode for each new value.

• Warning. Automatic setpoints over 30V will not place the CL3001

in standby mode for each new value.

f) The CL3001 can be locked to a specific voltage range by

entering a value in that range and then selecting the secondary

RNG LOCK function by pressing the and keys.

4.2 DC Current Output

The CL3001 can source DC current from 0 mA to 100 mA.

a) Disconnect any test leads from external devices.

b) Press the key to select DC voltage and current mode, if

not already selected. If DC voltage mode is displayed, press the key again to cycle to DC current mode.

c) Connect the unit under test to the current output terminals of the

CL3001 as shown in figure 11.

Figure 11 - DC Current Output Connection

d) Use the numeric keypad to enter the desired output value and

press the key.

Alternatively, use the

or cursor key to select a digit to

e) When DC current mode is first selected, the CL3001 is placed in

the standby (Stby) mode which puts the positive (+) output jack into a high impedance state (>100k ohm) for safety. To place

the output into the active state, press the key which toggles between the standby and operate modes.

The standby mode is also activated in the following situations:

• No connection made to the output terminals.

• The voltage compliance for a given output current is exceeded. The CL3001 has a typical voltage compliance of 10V so that 420mA application loads of up to 500 ohms can be driven. At maximum current of 100mA, the maximum load is 100 ohms.

4.3 Resistance Temperature Detector (RTD) and Ohms Measure

The CL3001 can measure all common RTD types, 5 custom RTD curves, and a custom SPRT in °F or °C, plus basic resistance from 0 to 4000 ohms.

The following common RTD types are supported:

Pt 385 100Ω, 200Ω, 500Ω, 1000Ω

Pt 3926 100Ω

Pt 3916 (JIS) 100Ω

Ni120 120Ω

Cu 427 10Ω

YSI 400

a) Disconnect any test leads from external devices.

b) Press the key to select thermocouple and RTD/Ω mode,

if not already selected. If thermocouple mode is displayed, press the key again to cycle to RTD/Ω mode.

c) If output mode is displayed, select input mode by pressing the

and keys.

d) Press the key to select the desired RTD type, the custom

curve, the SPRT, or the desired ohms range. The set up and use of custom RTD coefficients is described in section 4.5. The set up and use of SPRT coefficients is described in section 4.6.

e) Connect the unit under test to the 4 wire RTD/Ω input terminals

of the CL3001 as shown in figure 12.

Figure 12 - RTD/Ω Input Connection

f) Press the and keys to toggle the RTD display

between °F and °C.

g) For best accuracy, it is advisable to zero the RTD resistance

circuit(s) daily, or if the CL3001 is being used outside of the ambient temperature range of 18 to 28 °C. The maximum offset from unit calibration that can be zeroed out is ±0.1 ohm for the high range and ±0.01 ohm for the low range.

To zero a RTD resistance circuit:

• Select the RTD measure function as described above, and

press the key until the low or high ohms range is selected.

• Short the RTD/Ω terminals with the test leads normally used for RTD/Ω measurements.

• Allow at least 3 minutes for the test leads and terminals to stabilize to the same temperature.

• Press the and keys to zero the ohms range.

4.4 Resistance Temperature Detector (RTD) and Ohms Source

The CL3001 can source all common RTD types and 5 custom RTD curves in °F or °C, plus basic resistance from 5 to 4000 ohms.

The following common RTD types are supported:

Pt 385 100Ω, 200Ω, 500Ω, 1000Ω Pt 3926 100Ω Pt 3916 (JIS) 100Ω Ni120 120Ω Cu 427 10Ω YSI 400

a) Disconnect any test leads from external devices.

b) Press the key to select thermocouple and RTD/Ω mode,

if not already selected. If thermocouple mode is displayed, press the key again to cycle to RTD/Ω mode.

c) If input mode is displayed, select output mode by pressing the

and keys.

d) Press the key to select the desired RTD curve or ohms

range. The set up and use of custom RTD coefficients is described in section 4.5.

e) Connect the unit under test to the RTD/Ω output terminals of the

CL3001 as shown in figure 13.

Figure 13 - RTD/Ω Output Connection

f) Press the and keys to toggle the RTD display

between °F and °C.

g) Use the numeric keypad to enter the desired output value and

press the key. Alternatively, use the

or cursor key

to select a digit to modify, followed by the or cursor key to ramp the digit up or down. This method offers a simple solution when small changes to an output value are required, or if specific decades need to be incremented or decremented.

h) When RTD/Ω mode is first selected, the CL3001 is placed in the

standby (Stby) mode which puts the positive (+) output jack into a high impedance state (>100k ohm) for safety. To place the

output into the active state, press the key which toggles between the standby and operate modes.

4.5 Resistance Temperature Detector (RTD) with Custom Coefficients

The CL3001 has the capability to store coefficients for up to 5 custom RTD curves.

To enter the coefficients for a custom RTD curve:

a) Select RTD measure or source mode as described in the

preceding sections.

b) Press the key until the USR_DEF type is selected.

c) Press the key to display the curve selection prompt

"RTD CUSTOM (1-5)".

d) Press the numeric key corresponding to the custom RTD

curve to be entered.

e) At the "SET(1)/RECALL(2)" prompt, press to select

custom RTD curve data entry.

f) At the "ENTER MIN TEMP" prompt, enter the minimum

temperature limit for the custom RTD curve, and press the

key.

g) At the "ENTER MAX TEMP" prompt, enter the maximum

temperature limit for the custom RTD curve, and press the

key.

h) At the "ENTER R0" prompt, enter the nominal resistance

value (R0) for the custom RTD curve, and press the key.

i) At the "ENTER COEFF A" prompt, enter the first (A)

coefficient for the custom RTD curve, and press the key. To enter a coefficient that includes an exponent, enter

the mantissa, press the and keys to select the

EXP function, enter the exponent, and press the key.

j) When prompted, enter the second (B) and third (C)

coefficients in the same manner.

k) To abort the curve entry without saving any changes, press

the key.

To use a custom RTD curve:

a) Select RTD measure or source mode as described in the

preceding sections.

b) Press the key until the USR_DEF type is selected.

c) Press the key to display the curve selection prompt

"RTD CUSTOM (1-5)".

d) Press the numeric key corresponding to the custom RTD

curve to be used.

e) At the "SET(1)/RECALL(2)" prompt, press to recall the

custom RTD curve coefficients.

f) To use a different custom RTD curve, press the key

twice to display the USR_DEF selection prompt.

The USR_DEF function of the CL3001 uses the Calendar-Van Dusen equation for sourcing and measuring custom RTD's. The C coefficient is only used for the subrange -260 to 0 degrees Celsius. Only the A and B coefficients are needed for the subrange 0 to 630 degrees. The R0 value is the resistance of the probe at 0 degrees Celsius.

All 5 of the custom RTD curves are set to PT385 at the factory, as shown in Table 2.

Table 2 - Default Custom RTD Coefficients

Curve Subrange R0 Coefficient A Coefficient B Coefficient C

1 0 to 630 100 3.9083e10-3 -5.775e10-7 0

2 -260 to 0 100 3.9083e10-3 -5.775e10-7 -4.183e10-12

3 0 to 630 100 3.9083e10-3 -5.775e10-7 0

4 -260 to 0 100 3.9083e10-3 -5.775e10-7 -4.183e10-12

5 0 to 630 100 3.9083e10-3 -5.775e10-7 0

Table 3 shows the coefficients for RTD types PT391 and PT392. The C coefficient is only used for temperatures below 0 degrees Celsius.

Table 3 - Other Common RTD Coefficients

RTD Type R0 Coefficient A Coefficient B Coefficient C

PT392 100 3.9848e10-3 -5.87e10-7 -4.0e10-12

PT391 100 3.9692e10-3 -5.8495e10-7 -4.2325e10-12

4.6 Standard Platinum Resistance Thermometer (SPRT) Coefficients

The SPRT function of the CL3001 uses ITS-90 standard coefficients as a basis for measuring a SPRT. The five custom coefficients are entered as deviations from the standard coefficients, and as such, all of them are set to zero at the factory.

The coefficients A- and B- represent the A

and B4coefficient,

obtained when the SPRT is calibrated at the triple points of argon, mercury and water. This covers the 83.8058K to 273.16K subrange. Coefficients A, B and C can represent different coefficients based on which subranges of the SPRT has been calibrated. For example, if the 273.15K to 933.473K subrange was used, A, B and C would represent A

, B7and C7whereas if the 273.15K to 692.67K subrange

was used, A and B would represent A

and B8and C=0.

To enter the deviation coefficients for a custom SPRT:

a) Select RTD measure mode as described in the preceding

section.

b) Press the key until the SPRT type is selected.

c) Press the key to display the action prompt

"SET(1)/RECALL(2)".

d) Press to select custom SPRT data entry.

e) At the "ENTER MIN TEMP" prompt, enter the minimum

temperature limit for the custom SPRT, and press the

key.

f) At the "ENTER MAX TEMP" prompt, enter the maximum

temperature limit for the custom SPRT, and press the

key.

g) At the "ENTER RTPW" prompt, enter the nominal

resistance value (RTPW) for the custom SPRT, and press

the key.

h) At the "ENTER COEFF A" prompt, enter the first (A)

deviation coefficient for the custom SPRT, and press the

key. To enter a coefficient that includes an

exponent, enter the mantissa, press the and keys to select the EXP function, enter the exponent, and

press the key.

i) When prompted, enter the second (B), third (C), fourth (A-),

and fifth (B-) deviation coefficients in the same manner.

j) To abort the SPRT entry without saving any changes,

press the key.

To use a custom SPRT:

a) Select RTD measure mode as described in the preceding

section.

b) Press the key until the SPRT type is selected.

c) Press the key to display the action prompt

"SET(1)/RECALL(2)".

d) Press to recall the custom SPRT curve coefficients.

e) To use a different custom SPRT, press the key twice

to display the SPRT selection prompt.

4.7 Thermocouple (T/C) Measure

The CL3001 can measure all common thermocouple types in °F or °C, plus basic millivolts from -10.0 to 75.0 mV.

The following common thermocouple types are supported:

B, C, E, J, K, L, N, R, S, T, U, XK, BP

a) Disconnect any test leads from external devices.

b) Press the key to select thermocouple and RTD/O mode, if

not already selected. If RTD/O mode is displayed, press the key again to cycle to thermocouple mode.

c) If output mode is displayed, select input mode by pressing the

and keys.

d) Press the key to select the desired thermocouple type or

the millivolt range.

e) Connect the unit under test to the thermocouple terminals of the

CL3001 using a standard T/C miniplug as shown in figure 14. One pin is wider than the other; do not attempt to force the plug in the wrong polarization. The T/C wire used for the connection must match the thermocouple type selected for proper cold junction compensation. If the CL3001 and the T/C miniplug are

at different temperatures, wait at least 3 minutes for the miniplug and terminals to stabilize to the same temperature.

Figure 14 - Thermocouple Input Connection

f) Press the and keys to toggle the thermocouple

display between °F and °C.

g) Press the and keys to toggle the cold junction

compensation between the internal temperature sensor and an external reference.

h) For best accuracy, it is advisable to zero the T/C millivolt circuit

daily, or if the CL3001 is being used outside of the ambient temperature range of 18 to 28 °C. The maximum offset from unit calibration that can be zeroed out is ±1 mV.

To zero the T/C millivolt circuit:

• Select the thermocouple measure function as described

above, and press the key until the millivolt range is selected.

• Insert the supplied thermocouple shorting jumper into the thermocouple terminals.

• Allow at least 3 minutes for the jumper and terminals to stabilize to the same temperature.

• Press the and keys to zero the T/C millivolt circuit.

4.8 Thermocouple (TC) Source

The CL3001 can source all common thermocouple types in °F or °C, plus basic millivolts from -10.0 to 75.0 mV.

The following common thermocouple types are supported:

B, C, E, J, K, L, N, R, S, T, U, XK, BP

a) Disconnect any test leads from external devices.

b) Press the key to select thermocouple and RTD/Ω mode, if

not already selected. If RTD/Ω mode is displayed, press the key again to cycle to thermocouple mode.

c) If input mode is displayed, select output mode by pressing the

and keys.

d) Press the key to select the desired thermocouple type or

the millivolt range.

e) Connect the unit under test to the thermocouple terminals of the

CL3001 using a standard T/C miniplug as shown in figure 15. One pin is wider than the other; do not attempt to force the plug in the wrong polarization. The T/C wire used for the connection must match the thermocouple type selected for proper cold junction compensation. If the CL3001 and the T/C miniplug are at different temperatures, wait at least 3 minutes for the miniplug and terminals to stabilize to the same temperature.

Figure 15 - Thermocouple Output Connection

f) Press the and keys to toggle the thermocouple

display between °F and °C.

g) Press the and keys to toggle the cold junction

compensation between the internal temperature sensor and an external reference.

h) Use the numeric keypad to enter the desired output value and

press the key.

Alternatively, use the or cursor key to select a digit to

i) For best accuracy, it is advisable to zero the T/C millivolt circuit

daily, or if the CL3001 is being used outside of the ambient temperature range of 18 to 28 °C. This procedure is described in section 4.7 on thermocouple measurements.

4.9 Pressure Measure

The CL3001 can support the following types of pressure modules:

• Omega Pressure Modules

• Mensor Corporation Model 6100 Modules

The Omega modules require the use of the Omega PCL-PMA Adapter and offer the best performance vs. cost. The adapter allows the user to "Hot Swap" a pressure module for quick range changes. For applications that require very high accuracy the Mensor 6100 Series, while expensive, will yield the best accuracy. It may be helpful to discuss your pressure needs with Omega Technical Support before you purchase modules.

a) Connect the pressure module to the CL3001 as shown in figure

16.

Figure 16 - Pressure Module Connection

b) Press the key. The CL3001 automatically senses which

pressure module is attached and sets its range accordingly.

c) Press the key to select the desired pressure units for

display.

d) Before attaching the module to the pressure source, zero the

module as described in the instruction sheet that came with the

module. Procedures vary, but all end with pressing the

and keys.

e) Attach the module to the pressure source according to the

instruction sheet that came with the module, taking care to follow all safety precautions when dealing with high pressures.

5. Isolated Inputs

5.1 Voltage Input

The CL3001 can measure DC voltages from 0 V to 100 V, using the following two ranges for maximum accuracy: 10 V, and 100 V.

a) Disconnect any test leads from external devices.

b) Press the key to select isolated DC voltage and current

input mode, if not already selected. If the desired DC voltage mode is not displayed, press the key again to cycle to the desired DC voltage mode.

c) Connect the unit under test to the isolated voltage/current input

terminals of the CL3001 as shown in figure 17.

Figure 17 - Isolated DC Voltage Input Connection

5.2 Current Input

The CL3001 can measure DC current from 0 mA to 50 mA.

a) Disconnect any test leads from external devices.

b) Press the key to select isolated DC voltage and current

input mode, if not already selected. If the DC current mode is not displayed, press the key again to cycle to it.

c) Connect the unit under test to the isolated voltage/current input

terminals of the CL3001 as shown in figure 18.

Figure 18 - Isolated DC Current Input Connection

d) If the UUT is a 2 wire loop powered transmitter that is

disconnected from the wiring, press the key to activate the CL3001 internal 24V supply in series with the current measuring circuit. The top line changes to 24mA LPWR to indicate that the supply is activated. Press the key again to deactivate the supply, and the top line reverts to 50mA RANGE.

e) If a 250 ohm resistor is required during a HART calibration

procedure, press the key to switch in the CL3001 internal 250 ohm resistor. The word HART is appended to the top line of the display to indicate that the resistor is switched in. Press the key again to switch out the resistor, and the display reverts to its previous state. This resistor lowers the maximum load driving capability from 1000 ohms at 20 mA to 750 ohms at 20 mA.

5.3 Pressure Input

The isolated pressure display uses the same physical pressure connector as the primary display. It is possible to have both displays selected to pressure simultaneously, showing the same source in different pressure units. See section 4.9 for a general discussion on pressure module selection.

a) Connect the pressure module to the CL3001 as shown in figure

19.

Figure 19 - Isolated Pressure Module Connection

b) Press the key. The CL3001 automatically senses which

pressure module is attached and sets its range accordingly.

c) If necessary, press the key again to cycle through the

pressure units until the desired one is displayed.

d) Before attaching the module to the pressure source, zero the

module as described in the instruction sheet that came with the

module. Procedures vary, but all end with pressing the

and keys.

e) Attach the module to the pressure source according to the

instruction sheet that came with the module, taking care to follow all safety precautions when dealing with high pressures.

6. Output Setpoints

Nine preset output setpoints may be stored and recalled for each of the following output modes:

• Voltage

• Current

• each thermocouple type, including millivolts

• each RTD type, including each of the five custom curves.

They may be recalled on an individual basis, or as an automatic up and down cycle with a configurable dwell time between each setpoint. The automatic cycle feature always starts at setpoint number 1, stepping up to a user specified ending setpoint number, then back down in reverse order, and then repeats.

To set a setpoint:

a) Select the output mode.

b) Enter the output value for the setpoint.

c) Press the and keys to select the SET function.

d) At the setpoint number selection prompt "SET POINT#",

press the numeric key, 1 to 9, corresponding to the setpoint to be set.

e) If the automatic cycle feature is to be used, care should be

taken to order the setpoint values in an appropriate manner. It always cycles between setpoint number 1 and a user specified ending setpoint number. The values in the cycled group of setpoints should be entered with this in mind. Any random setpoints used for individual checks can then be located after the usual ending setpoint number.

To recall a single setpoint:

a) Select the output mode.

b) Press the and keys to select the RECALL

function.

c) At the setpoint number selection prompt "RECALL SPT#",

press the numeric key, 1 to 9, corresponding to the setpoint to be recalled.

To start an automatic setpoint cycle:

a) Select the output mode.

b) Press the and keys to select the AUTOSET

function.

c) At the ending setpoint number selection prompt "AUTO

SET POINT", press the numeric key, 1 to 9, corresponding to the ending setpoint number for the cycle.

d) At the dwell time prompt "DWELL TIME", "5-500?", enter

the number of seconds, 5 to 500, to dwell at each setpoint

value, followed by the key.

e) The key can be used at any time during the cycle

without stopping it.

f) Press any other key to terminate the cycle.

7. Application Notes

7.1 P/I Transmitter

Figure 20 - P/I Transmitter Application

1. Disconnect any test leads from external devices.

2. Select pressure input on the primary display as described in section 4.9.

3. Select current input on the isolated display as described in section 5.2. Select the isolated loop power option. If a HART communicator is to be used for set up of the transmitter, select the HART option.

4. Connect the transmitter as shown in figure 20.

5. Test and calibrate the transmitter per the manufacturer's instructions.

7.2 I/P Transmitter

Figure 21 - I/P Transmitter Application

1. Disconnect any test leads from external devices.

2. Select current output on the primary display as described in section 4.2.

3. Select pressure input on the isolated display as described in section 5.3

4. Connect the transmitter as shown in figure 21.

5. Test and calibrate the transmitter per the manufacturer's instructions.

7.3 V/I Transmitter

Figure 22 - V/I Transmitter Application

1. Disconnect any test leads from external devices.

2. Select voltage output on the primary display as described in section 4.1

3. Select current input on the isolated display as described in section 5.2. Select the isolated loop power option.

4. Connect the transmitter as shown in figure 22.

5. Test and calibrate the transmitter per the manufacturer's instructions.

7.4 RTD Test

Figure 23 - RTD Test Application

1. Disconnect any test leads from external devices.

2. Select RTD input on the primary display as described in section

4.3. Select the RTD type which corresponds to the RTD being tested.

3. Connect the RTD as shown in figure 23.

4. Test the RTD per the manufacturer's instructions.

7.5 RTD Transmitter

Figure 24 - RTD Transmitter Application

1. Disconnect any test leads from external devices.

2. Select RTD output on the primary display as described in section

4.4. Select the RTD type which corresponds to the transmitter being tested.

4. Connect the transmitter as shown in figure 24.

5. Test and calibrate the transmitter per the manufacturer's instructions.

7.6 Thermocouple Test

Figure 25 - Thermocouple Test Application

1. Disconnect any test leads from external devices.

2. Select thermocouple input on the primary display as described in section 4.7. Select the thermocouple type which corresponds to the thermocouple being tested.

3. Connect the thermocouple as shown in figure 25.

4. Test the thermocouple per the manufacturer's instructions.

7.7 Thermocouple Transmitter

Figure 26 - Thermocouple Transmitter Application

1. Disconnect any test leads from external devices.

2. Select thermocouple output on the primary display as described in section 4.8. Select the thermocouple type which corresponds to the transmitter being tested.

4. Connect the transmitter as shown in figure 26.

5. Test and calibrate the transmitter per the manufacturer's instructions.

7.8 RTD Indicator

Figure 27 - RTD Indicator Application

1. Disconnect any test leads from external devices.

2. Select RTD output on the primary display as described in section

4.4. Select the RTD type which corresponds to the indicator being tested.

3. Connect the indicator as shown in figure 27.

4. Test and calibrate the indicator per the manufacturer's instructions.

7.9 Precision Current Trip

Figure 28 - Precision Current Trip Application

1. Disconnect any test leads from external devices.

2. Select current output on the primary display as described in section 4.2.

3. Select voltage input on the isolated display as described in section 5.1.

4. Connect the trip as shown in figure 28.

5. Test and calibrate the trip per the manufacturer's instructions.

7.10 I/I Isolator/Transmitter

Figure 29 - I/I Isolator/Transmitter Application

1. Disconnect any test leads from external devices.

2. Select current output on the primary display as described in section 4.2.

3. Select current input on the isolated display as described in section 5.2. Select the isolated loop power option.

4. Connect the transmitter as shown in figure 29.

5. Test and calibrate the transmitter per the manufacturer's instructions.

7.11 Precision Temperature Measurement with 4-Wire RTD Probe

Figure 30 - Precision Temperature Measurement with

4-Wire RTD Probe

1. With the RTD probe and the corresponding custom coefficients, the total system error is 0.03°C.

2. Disconnect any test leads from external devices.

3. Select RTD input on the primary display as described in section

4.3. Select the user defined curve containing the custom coefficients for the Probe. If custom coefficients have not yet been entered for the Probe, follow the instructions in section 4.5 to do so.

4. Connect the probe as shown in figure 30.

8. LCD and Remote Interface Setup Procedures

These procedures are accessed in sequence as follows:

a) Press the and keys to select the SETUP

function.

b) At the "LCD CONTRAST" prompt, press the

key to adjust the LCD contrast level. When complete,

press the key.

c) At the "LCD BACKLIGHT" prompt, press the

key to adjust the LCD backlight level. When complete,

press the key.

d) At the "Remote Interface" prompt, press the

or key

to select the RS-232 interface or the GPIB interface. When

the desired interface is selected, press the key.

e) If the GPIB interface was selected, the "GPIB Address"

prompt appears. Press the

or key to ramp

through the possible addresses, 0 to 30. When the

desired address is displayed, press the key.

9. Remote Interface

9.1 Introduction

The CL3001 can be controlled remotely from a personal computer (PC) using either a RS-232 serial connection or an IEEE-488 parallel connection (also called a General Purpose Interface Bus, or GPIB, connection). In either case, individual commands can be typed into a terminal emulator program suitable for the connection type, or the calibrator can be controlled by an automated PC program using the CL3001 command set. You can write your own automated PC program, or it may be possible to purchase a suitable third party program and configure it for the CL3001. Compatible software for IEEE-488 operation may be purchased from third parties.

The RS-232 connection allows one CL3001 to be connected to one PC. The communications speed is slower than IEEE-488, but no extra equipment is required other than a low cost null modem cable.

The IEEE-488 connection allows up to 15 different calibrators, PC's, and items of test equipment to be connected together in a bus arrangement. The communications speed is much faster than RS232, but it requires the purchase and installation of special PC interface card(s) and connecting cable(s).

This section describes the set up of the two types of connections, and the general operation of the command set. Section 10 describes the individual commands in detail.

9.2 Setting up the RS-232 Port for Remote Control

The CL3001 is fully programmable over a standard RS-232 link with a PC. The RS-232 cable length for the port should not exceed 15 meters (50 feet), although longer cable lengths are permitted if the load capacitance measured at a connection point (including signal terminator) does not exceed 2500 pF.

The serial communications parameters in the CL3001 are fixed at the following values:

• 9600 baud

• 8 data bits

• 1 stop bit

• no parity

• Xon/Xoff

• EOL (end-of-line) character CR (Carriage Return)

A typical RS-232 connection is shown in Figure 31. Note the use of a null modem cable for the connection. See section 2.5 for the location of the RS-232 port on the rear panel of the CL3001.

9.2.1 Using the CL3001 on Computers with USB Ports

The CL3001 can be used with a computer having only USB ports with the use of a USB to serial converter.

Figure 31 - RS-232 Remote Connection

9.3 Setting up the IEEE-488 Port for Remote Control

The CL3001 is fully programmable for use on a standard IEEE-488 interface bus. The IEEE-488 interface is also designed in compliance with supplemental standard IEEE-488.2, which describes additional IEEE-488 features. Devices connected to the IEEE-488 bus are designated as talkers, listeners, talker/listeners, or controllers. Under remote control of an instrument, the CL3001 operates as a talker/listener.

A PC equipped with an IEEE-488 interface controls the CL3001.

When using the IEEE-488 remote control interface, there are two restrictions:

• A maximum of 15 devices can be connected in a single IEEE488 bus system.

• The total length of IEEE-488 cables used in one IEEE-488 bus system is 2 meters times the number of devices in the system, or 20 meters, whichever is less.

See section 8 for instructions on configuring the CL3001 for IEEE488 (GPIB) operation, including selecting the interface and the bus address.

A typical IEEE-488 (GPIB) connection is shown in Figure 32. See section 2.5 for the location of the IEEE-488 (GPIB) port on the rear panel of the CL3001.

Figure 32 - IEEE-488 (GPIB) Remote Connection

9.4 Changing Between Local and Remote Operation

In addition to local mode (front panel operation) and remote, the CL3001 can be placed into a local lockout condition at any time by command of the controller. Combined, the local, remote, and lockout conditions yield four possible operating states as follows.

a) Local State

The CL3001 responds to local and remote commands. This is normal front panel operation. All remote commands received by the CL3001 are processed.

b) Local with Lockout State

Local with lockout is identical to local, except that the CL3001 will go into the remote with lockout state instead of the remote state when it receives a remote command. This state can only be entered by sending the IEEE-488 command GTL (Go To Local) when in the remote with lockout state.

c) Remote State

When the CL3001 is placed in remote, either via a RS-232 REMOTE command, or via the IEEE-488 asserting the REN line, it enters the remote state. The left end of the top line of the display changes to: rem.

Front panel operation is disabled except for the LOCAL (0) key. Pressing the LOCAL key, using RS-232 to send the LOCAL command, or IEEE-488 to send the GTL (Go To Local) message, returns the CL3001 to the local state.

d) Remote with Lockout State

When the CL3001 is placed in lockout, either via a RS-232 LOCKOUT command, or via the IEEE-488 message LLO (Local Lockout), the CL3001 front panel controls are totally locked out. The left end of the top line of the display changes to: rem.

To return the CL3001 to the local with lockout state, send the RS-232 LOCAL command or the IEEE-488 GTL (Go To Local) message.

Table 4 summarizes the possible operating state transitions. For more information on IEEE-488 GPIB messages, see section 9.5.

Table 4 - Operating State Transitions

From To Front Panel GPIB Message Serial Command

Local Remote MLA (REN True) REMOTE

Local with Lockout LLO LOCKOUT

Remote Local Local 0 key GTL or REN False LOCAL

Remote with Lockout LLO LOCKOUT

Local with Local REN False LOCAL Lockout Remote with Lockout MLA (REN True) REMOTE

Remote with Local REN False LOCAL Lockout Local with Lockout GTL

9.5 IEEE-488 Interface Overview

The IEEE-488 parallel interface sends commands as data and receives measurements and messages as data. The maximum data exchange rate is 1 Mbyte per second, with a maximum distance of 20 meters for the total length of the connecting cables. A single cable should not exceed 4 meters in length.

Several commands are used only for RS-232 serial operation because these functions must be implemented as IEEE uniline (single control line) bus management messages per the IEEE Standards. For example, the command REMOTE could be sent as data over the IEEE-488 interface to place the CL3001 into remote operating mode, but it is not because the IEEE Standards call for the remote function to be sent to the device as the uniline message REN. This is also true for several other commands and functions, as shown in table 5 below with their RS-232 equivalents.

Table 5 - RS-232 Emulation of IEEE-488 Messages

IEEE-488 Message RS-232 Equivalent

GTL LOCAL command

GTR REMOTE command

LLO LOCKOUT command

SDC, DCL (not emulated on RS-232)

GET (not emulated on RS-232)

SPE, SPD (not emulated on RS-232)

UNL, UNT (not emulated on RS-232)

The IEEE-488 interface is based on the IEEE Standards 488.1 and

488.2. For detailed information, refer to the IEEE-488.1 and IEEE-

488.2 standards.

9.6 Using Commands

Communications between the controller and the CL3001 consist of commands, queries, and interface messages. Although the commands are based on the 488.2 standard, they can be used on either the IEEE-488 or RS-232 interface, except for a few specific RS232 only commands as described in the subsection Commands for RS-232 Only below.

For more detailed information on IEEE command structures, see the IEEE 488.2 standard.

Refer to section 10 for more detailed information about the commands referenced in this section.

All commands, units, and text data may be entered in UPPER or lower case letters. The CL3001 converts all lower case letters to upper case before processing.

9.6.1 Types of Commands

The commands for the CL3001 can be grouped into the following categories based on how they function.

a) Device-Dependent Commands

Device-dependent commands are unique to the CL3001. An example of a device-dependent command is:

OUT 1 V

This command instructs the CL3001 to source 1 volt DC.

b) Common Commands

Common commands are defined by the IEEE 488.2 standard and are common to most bus devices. Common commands always begin with an asterisk (*) character. Common commands are available whether you are using the IEEE-488 or RS-232 interface for remote control. An example of a common command is:

*IDN?

This command instructs the CL3001 to return the instrument identification string.

c) Query Commands

Query commands request information, which may be returned as the command executes, or may be placed in a buffer until requested later. Query commands always end with a question mark. An example of a query commands is:

RANGE?

This command instructs the CL3001 to return the present DC voltage output range.

d) Interface Messages (IEEE-488)

Interface messages manage traffic on the IEEE-488 interface bus. Device addressing and clearing, data handshaking, and commands to place status bytes on the bus are all directed by interface messages. Some of the interface messages occur as state transitions of dedicated control lines. The rest of the interface messages are sent over the data lines with the ATN signal true. All devicedependent and common commands are sent over the data lines with the ATN signal false.

An important thing to note about interface messages is that, unlike device-dependent and common commands, interface messages are not sent literally (in a direct way). They are converted to parallel signal levels on the bus data and control lines.

IEEE-488 standards define interface messages which are handled automatically in most cases.

e) Compound Commands

A compound command is two or more commands placed on a single command line separated from each other with semicolons. For example, consider the following two individual commands:

OUT 1 V

OPER

These could be combined into the compound command:

OUT 1 V; OPER

These commands instruct the CL3001 to source 1 V DC, and then go into operate mode.

f) Overlapped Commands

Commands that begin execution but require slightly more time than the normal communication command/response interval to complete are called overlapped commands. This is because they can be overlapped by receipt the next command before they have been completed.

The detailed command descriptions in section 10 show a check mark T beside Overlapped for overlapped commands.

Use the command *WAI to wait until the overlapped

command has completed execution before executing the next command. For example:

OUT 1 V; *WAI

You can also use the status commands *OPC and *OPC? to detect the completion of overlapped commands.

g) Sequential Commands

Commands that execute immediately are called sequential commands.

The detailed command descriptions in section 10 show a check mark T beside Sequential for sequential commands.

The majority of commands are sequential.

h) Commands for RS-232 Only

Several commands are used only for RS?232 serial operation because these functions must be implemented as IEEE uniline (single control line) bus management messages per the IEEE Standards. For example, the command REMOTE could be sent as data over the IEEE488 interface to place the CL3001 into remote operating mode, but it is not because the IEEE Standards call for the remote function to be sent to the device as the uniline message REN. This is also true for several other commands and functions, as shown in table 6 below with their RS-232 equivalents.

For these commands, the detailed command descriptions in section 10 show a check mark beside RS-232, but no check mark beside IEEE-488.

Table 6 - Commands for RS-232 Only

IEEE-488 Message RS-232 Equivalent

GTL LOCAL command

GTR REMOTE command

LLO LOCKOUT command

i) Commands for IEEE-488

These are all of the commands except for those used for RS-232 only, as described above. All commands are transferred over the IEEE-488 as data, except for the commands LOCAL, REMOTE, and LOCKOUT, which are implemented per the IEEE Standards as uniline messages.

The detailed command descriptions in section 10 show a check mark T beside IEEE-488 for these commands.

9.6.2 Command Syntax

The following syntax rules apply to all of the remote commands. Information about the syntax of response messages is also given.

a) Parameter Syntax Rules

Table 7 lists the units accepted in command parameters and used in responses. All commands and units may be entered in upper or lower case.

Table 7 - Units Accepted in Parameters and Used in Responses

Units Meaning

uV Volts in units of microvolts1

mV Volts in units of millivolts1

V Volts in units of volts

kV Volts in units of kilovolts1

uA Current in units of microamperes1

mA Current in units of milliamps1

A Current in units of amps

Ohm Resistance in units of ohms

kOhm Resistance in units of kilohms1

MOhm Resistance in units of megohms1

cel Temperature in degrees Celsius

far Temperature in degrees Fahrenheit

psi Pressure in pounds per square inch

mmHg Pressure in millimeters of mercury at 0 °C

inHg Pressure in inches of mercury at 0 °C

inH2O4C Pressure in inches of water at 4 °C

inH2O20C Pressure in inches of water at 20 °C

inH2O60F Pressure in inches of water at 60 °F

cmH2O4C Pressure in centimeters of water at 4 °C

cmH2O20C Pressure in centimeters of water at 20 °C

mmH2O4C Pressure in millimeters of water at 4 °C

mmH2O20C Pressure in millimeters of water at 20 °C

bar Pressure in bar

mbar Pressure in millibar

kPa Pressure in kilopascals

MPa Pressure in megapascals

kg/cm2 Pressure in kilograms per square centimeter

1 Parameter only

b) General Rules

The general rules for parameter usage are as follows:

• Numeric parameters may have up 15 significant digits and their value can be in the range +/-1.0E+/-20.

• Including too many or too few parameters causes a command error.

• Null parameters cause an error, e.g., the adjacent commas in OUT 1V, ,;OPER.

• Expressions, for example 4+2*13, are not allowed as parameters.

c) Extra Space or Tab Characters

In the command descriptions, parameters are shown separated by spaces. One space after a command is required (unless no parameters are required). All other spaces are optional. Spaces are inserted for clarity in the manual and may be left in or omitted as desired. You can insert extra spaces or tabs between parameters as desired. Extra spaces within a parameter are generally not allowed, except between a number and its associated multiplier or unit.

d) Terminators

Table 8 summarizes the terminator characters for both the IEEE488 and the RS-232 remote interfaces.

Table 8 - Terminator Characters

Terminator Function ASCII Character Control Language

Command Command

Number Program Terminator Terminator

Carriage Return (CR) 13 Chr(13) <Cntl> M \n

Line Feed (LF) 10 Chr(10) <Cntl> J \r

Backspace (BS) 8 Chr(8) <Cntl> H \b

Form Feed (FF) 12 Chr(12) <Cntl> L \f

Examples: RS-232 Mode, terminal: OUT 1 V <Enter> RS-232 Mode, program:Comm1.Output = "OUT 1 V" + Chr(10) IEEE-488 Mode: OUT 1 V

IEEE-488 interface:

The CL3001 sends the ASCII character Carriage Return with the EOI control line held high as the terminator for response messages. The CL3001 recognizes the following as terminators when encountered in incoming data:

• ASCII CR character

• Any ASCII character sent with the EOI control line

asserted

RS-232 interface:

The CL3001 sends a Carriage Return (CR) character as the terminator for response messages. The CL3001 recognizes the following as terminators when encountered in incoming data:

• ASCII CR character

• ASCII LF character

e) Incoming Character Processing

The CL3001 processes all incoming data as follows:

• The most significant data bit (DIO8) is ignored

• All data is taken as 7-bit ASCII

• Lower case or upper case characters are accepted, with lower case converted to upper case before processing

f) Response Message Syntax

In the detailed command descriptions in section 10, the responses from the CL3001 are described wherever appropriate. In order to know what type of data to read in, refer to the beginning of the response description for the command.

9.7 Checking CL3001 Status

Figure 33 shows the status registers, enable registers, and queues in the CL3001 which indicate various conditions in the instrument. Some registers and queues are defined by the IEEE-488.2 standard, while the rest are specific to the CL3001. In addition to the status registers, the Service Request (SRQ) control line and a 16-element buffer called the Error Queue provide also status information.

Figure 33 - Status Register Overview

Table 9 lists the status registers and gives the read/write commands and associated mask registers used to access them.

Table 9 - Status Register Summary

Status Register Read Command Write Command

Serial Poll Status Byte (STB) *STB? —

Service Request Enable Register (SRE) *SRE? *SRE

Event Status Register (ESR) *ESR? —

Event Status Enable Register (ESE) *ESE? *ESE

Each status register and queue has a summary bit in the Serial Poll Status Byte. Enable registers are used to mask various bits in the status registers and to generate summary bits in the Serial Poll Status Byte. For IEEE-488 interface operation, the Service Request Enable Register is used to assert the SRQ control line on detection of any status condition or conditions that the programmer chooses. For RS-232 interface operation, the SRQSTR string is sent over the serial interface when the SRQ line is set.

1) Serial Poll Status Byte (STB)

The Calibrator sends the serial poll status byte (STB) when it responds to a serial poll. This byte is cleared (set to 0) when the power is turned on. The STB byte structure is shown in Figure 34. Refer to the *STB? command in section 10 for more information on reading this register.

76543210

0 RQS ESB MAV EAV 0 0 0

MSS

RQS Requesting service. The RQS bit is set to 1 whenever bits ESB,

MAV, EAV, or ISCB change from 0 to 1 and are enabled (1) in the SRE. When RQS is 1, the CL3001 asserts the SRQ control line on the IEEE-488 interface. You can do a serial poll to read this bit to see if the CL3001 is the source of an SRQ.

MSS Master summary status. Set to 1 whenever bits ESB, MAV, EAV,

or ISCB are 1 and enabled (1) in the SRE. This bit can be read using the *STB? Remote command in place of doing a serial poll.

ESB Set to 1 when one or more ESR bits are 1.

MAV Message available. The MAV bit is set to 1 whenever data is

available in the CL3001's IEEE-488 interface output buffer.

EAV Error available. An error has occurred and an error is available

to be read from the error queue by using the FAULT? query.

Figure 34 - Serial Poll Status Byte (STB) and Service Request

Enable (SRE) Registers

2) Service Request (SRQ) Line

IEEE-488 Service Request (SRQ) is an IEEE-488.1 bus control line that the CL3001 asserts to notify the controller that it requires some type of service. Many instruments can be on the bus, but they all share a single SRQ line. To determine which instrument set SRQ, the Controller normally does a serial poll of each instrument. The calibrator asserts SRQ whenever the RQS bit in its Serial Poll Status Byte is 1. This bit informs the controller that the CL3001 was the source of the SRQ.

The CL3001 clears SRQ and RQS whenever the controller/host performs a serial poll, sends *CLS, or whenever the MSS bit is cleared. The MSS bit is cleared only when ESB and MAV are 0, or they are disabled by their associated enable bits in the SRE register being set to 0.

3) Service Request Enable Register (SRE)

The Service Request Enable Register (SRE) enables or masks the bits of the Serial Poll Status Byte. The SRE is cleared at power up. Refer to Figure 34 for the bit functions.

4) Programming the STB and SRE

By resetting (to 0) the bits in the SRE, you can mask (disable) associated bits in the serial poll status byte. Bits set to 1 enable the associated bit in the serial poll status byte.

5) Event Status Register (ESR)

The Event Status Register is a two-byte register in which the higher eight bits are always 0, and the lower eight bits represent various conditions of the CL3001. The ESR is cleared (set to 0) when the power is turned on, and every time it is read.

Many of the remote commands require parameters. Improper use of parameters causes command errors to occur. When a command error occurs, bit CME (5) in the Event Status Register (ESR) goes to 1 (if enabled in ESE register), and the error is logged in the error queue.

6) Event Status Enable (ESE) Register

A mask register called the Event Status Enable register (ESE) allows the controller to enable or mask (disable) each bit in the ESR. When a bit in the ESE is 1, the corresponding bit in the ESR is enabled. When any enabled bit in the ESR is 1, the ESB bit in the Serial Poll Status Byte also goes to 1. The ESR bit stays 1 until the controller reads the ESR, does a device clear, a selected device clear, or sends the reset or *CLS command to the CL3001. The ESE is cleared (set to 0) when the power is turned on.

7) Bit Assignments for the ESR and ESE

The bits in the Event Status Register (ESR) and Event Status Enable register (ESE) are assigned as shown in Figure 35.

15 14 13 12 11 10 9 8

00000000

76543210

PON 0 CME EXE DDE QYE 0 OPC

PON Power on. This bit is set to 1 if line power has been turned

off and on since the last time the ESR was read.

CME Command error. The IEEE-488 interface of the CL3001

encountered an incorrectly formed command and placed an error code in the error queue. The command FAULT? can be used to fetch error codes from the error queue, which is described in more detail below.

EXE Execution error. An error occurred when the CL3001 tried

to execute the last command and an error code was placed into the error queue. This could be caused, for example, by a parameter being out of range. The command FAULT? can be used to fetch error codes from the error queue, which is described in more detail below.

DDE Device-dependent error. An error related to a device-

dependent command has occurred.

QYE Query error. The CL3001 was addressed to talk when no

response data was available or appropriate, or when the controller failed to retrieve data from the output queue.

OPC Operation complete. All commands previous to reception

of a *OPC command have been executed, and the interface is ready to accept another message.

Figure 35 - Event Status Register (ESR) and Event Status Enable

(ESE) Registers

8) Programming the ESR and ESE

To read the contents of the ESR, send the remote command, *ESR?. The ESR is cleared (set to 0) every time it is read. To read the contents of the ESE, send the remote command, *ESE?. The ESE is not cleared when it is read. When you read either register, the CL3001 responds by sending a decimal number that when converted to binary represents bits 0 through 15.

9) Output Queue

The output queue is loaded whenever a query is processed, and holds up to 250 characters. The controller reads it with a statement such as a BASIC INPUT statement, removing what it reads from the queue. If the queue is empty, the CL3001 does not respond to the INPUT statement from the controller. The Message Available (MAV) bit in the Serial Poll Status Byte is 1 if

there is something in the output queue, and 0 if the output queue is empty.

10) Error Queue

When a command error, execution error, or device-dependent error occurs, its error code is placed in the error queue where it can be read by the FAULT? command. Reading the first error with the FAULT? command removes that error from the queue. A response of 0 means the error queue is empty. The error queue is cleared when you turn off the power, and when you use the *CLS (Clear Status) common command. The error queue contains up to 15 entries. If more than 15 errors occur, only the first 15 errors are kept in the queue. A 16th entry in the queue is always an "error queue overflow" error, and all later errors are discarded until the queue is at least partially read. The first errors are kept, because if many errors occur before the user can acknowledge and read them, the earliest errors are the most likely to point to the problem. The later errors are usually repetitions or consequences of the original problem.

11) Input Buffer Operation

As the CL3001 receives each data byte from the controller, it places the byte in a portion of memory called the input buffer. The input buffer holds up to 250 data bytes and operates in a first in, first out fashion.

IEEE-488 interface:

The CL3001 treats the IEEE-488 EOI control line as a separate data byte and inserts it into the input buffer if it is encountered as part of a message terminator. Input buffer operation is transparent to the program running on the controller. If the controller sends commands faster than the CL3001 can process them, the input buffer fills to capacity. When the input buffer is full, the CL3001 holds off the IEEE-488 bus with the NRFD (Not Ready For Data) handshake line. When the CL3001 has processed a data byte from the full input buffer, it then completes the handshake, allowing the controller to send another data byte. The calibrator clears the input buffer on power-up and on receiving the DCL (Device Clear) or SDC (Selected Device Clear) message from the controller.

RS-232 interface:

The CL3001 uses the RS-232-C Xon/Xoff protocol to control buffer overflow. The CL3001 sends a Xoff (Ctrl S) character when the input buffer becomes 80% full, and sends a Xon (Ctrl Q) character when it has processed enough of the input buffer so that it is less than 40% full.

10. Remote Commands

10.1 Introduction

Remote commands duplicate actions that can be initiated from the front panel in local operating mode. Following the summary table is a complete alphabetical listing of all commands complete with protocol details. Separate headings in the alphabetical listing provide the parameters and responses, plus an example for each command. For information on using the commands, see section 9.

10.2 Command Summary by Function

Common Commands

Command Description

*CLS Clear status. Clears the ESR, the error queue, and the

RQS bit in the status byte. This command terminates any pending operation complete commands, *OPC or *OPC?.

*ESE Loads a byte into the Event Status Enable register.

*ESE? Returns the contents of the Event Status Enable register.

*ESR? Returns the contents of the Event Status register and

clears the register.

*IDN? Identification query. Returns the manufacturer, model

number, serial number, and firmware revision level of the Calibrator.

*OPC Sets bit 0 (OPC for Operation Complete) in the Event

Status Register to 1 when all pending device operations are complete.

*OPC? Returns a 1 after all pending operations are complete.

This command causes program execution to pause until all operations are complete. See also the *WAI command.

*OPT? Returns a list of the installed hardware and software

options.

*RST Resets the state of the instrument to the power-up state.

This command holds off execution of subsequent commands until it is complete.

*SRE Loads a byte into the Service Request Enable register

(SRE).

*SRE? Returns the byte from the Service Request Enable register.

*STB? Returns the status byte.

*TST? Runs a series of self-tests and returns a "0" for pass or a

"1" for fail. If any faults are detected, they are logged into the fault queue where they can be read by the FAULT? query.

*WAI Prevents further remote commands from being executed

until all previous remote commands have been completed.

External Connection Commands

Command Description

FUNC? Returns the present output, measurement, or calibration

function selected on the isolated and primary displays, in that order.

HART? Returns the HART resistor setting for the isolated

milliamp range, ON or OFF.

HART_OFF Turns off the HART resistor on the isolated milliamp

range.

HART_ON Turns on the HART resistor on the isolated milliamp

range.

ISO_PRES_UNIT Sets the isolated display pressure units.

ISO_PRES_UNIT? Returns the isolated display pressure units.

LOOP_POWER? Returns the 24V loop power setting for the isolated

milliamp range, ON or OFF.

LOOP_POWER _OFF Turns off the 24V loop power on the isolated milliamp

range.

LOOP_POWER _ON Turns on the 24V loop power on the isolated milliamp

range.

PRES_UNIT Sets the primary display pressure units.

PRES_UNIT? Returns the primary display pressure units.

RTD_TYPE Sets the Resistance Temperature Detector (RTD) type.

RTD_TYPE? Returns the Resistance Temperature Detector (RTD) type.

TC_REF Selects the internal temperature sensor or an external

reference value for cold junction compensation of thermocouple (TC) source and measurement.

TC_REF? Returns the source of the temperature being used for

cold junction compensation of thermocouple (TC) source and measurement.

TC_TYPE Sets the thermocouple (TC) type.

TC_TYPE? Returns the thermocouple (TC) type.

TSENS_TYPE Sets temperature mode, RTD or TC.

TSENS_TYPE? Returns the temperature mode.

Output Commands

Command Description

OPER Activates the CL3001 output if it is in standby mode.

OPER? Returns the operate/standby mode setting.

OUT Sets the output of the CL3001.

OUT? Returns the present output value of the CL3001.

RANGE? Returns the present output range, for voltage and current

only.

RANGELCK Locks the present output range, for voltage only.

RANGELCK? Returns the RANGELOCK state, for voltage only.

STBY Deactivates the CL3001 output if it is in operate mode.

Measurement Commands

Command Description

ISO_MEAS Sets the isolated input measurement type.

PRES? Queries the attached pressure module for its

manufacturer and serial number.

PRES_MEAS Changes the operating mode of the primary display to

pressure measurement.

RTD_MEAS Changes the operating mode to RTD measurement.

TC_MEAS Changes the operating mode to thermocouple

measurement.

VAL? Returns the last values for the isolated and primary

measurements, in that order.

ZERO_MEAS Zeros the pressure module, TC mV, or RTD ohms.

ZERO_MEAS? Returns the zero offset for the pressure module, TC mV,

or RTD ohms.

RS-232 Operating Mode Commands

Command Description

LOCAL Puts the CL3001 into the local state and disables

lockout.

LOCKOUT Puts the CL3001 into the lockout state. This command

duplicates the IEEE-488 LLO (Local Lockout) message.

REMOTE Puts the CL3001 into the remote state. This command

duplicates the IEEE-488 REN (Remote Enable) message.

Status Commands

Command Description

FAULT? Returns the most recent error code in the CL3001 error

queue, and then removes that error code from the queue.

10.3 Error Code Listing

Error Number Message Class Description

1 DDE Error queue overflow.

100 EXE OPER or STBY was received when the

CL3001 is in measure mode or thermocouple source mode.

101 CME A non-numeric entry was received in a field

that should contain a numeric entry.

102 EXE The numeric field exceeds 10 characters.

103 CME Invalid units name or prefix.

104 EXE An attempt to enter RTD source mode was

made when SPRT is selected, or to select SPRT when RTD source mode is selected.

105 EXE Entry is above upper limit for the selected out-

put range.

106 EXE Entry is below lower limit for the selected out-

put range.

108 CME A required command parameter was missing.

109 CME An invalid TC_MEAS or RTD_MEAS unit

parameter (not CEL or FAR) was received, or an invalid PRES_UNIT or ISO_PRES_UNIT parameter was received.

110 CME An invalid RANGELCK parameter was

received.

111 EXE RANGELCK ON was received when the

CL3001 is not in Volts mode.

112 CME An invalid RTD_TYPE parameter was

received.

113 CME An invalid TC_REF parameter was received.

114 CME An invalid TSENS_TYPE parameter was

received.

116 EXE No pressure module was present when a

pressure function was requested, or the total zero offset from calibration is more than 6%. This error can also occur if the total zero offset from calibration is out of limits when zeroing the thermocouple millivolts type (maximum offset ±1 mV), or the RTD ohms type (maximum ±0.1 ohm on high range, or ±0.01 ohm on the low range).

117 CME An unrecognizable command was received.

118 CME An invalid parameter was received.

120 EXE The serial input buffer overflowed

121 EXE The command string buffer overflowed.

122 QYE The serial output buffer overflowed.

123 DDE The output overloaded. See display error

message OVER LOAD in section 2.7.

124 DDE The CL3001 is out of tolerance. This error is

set after a failed initialization or a failed *TST? command.

125 DDE The CL3001 ADC has failed. This error is set

after a failed initialization or a failed *TST? command.

10.4 Remote Command Listing

The following is an alphabetical list of all CL3001 remote commands and queries, including the common commands and the devicedependent commands. Each command title includes a checkbox that indicates the remote interface applicability, IEEE-488 and/or RS232, and the command group, Sequential or Overlapped; see section 9.6.1 for a description of these terms.

*CLS IEEE-488 RS-232 Sequential Overlapped

Clear Status command. This command clears the ESR, the error queue, and the RQS bit in the status byte. This command terminates any pending operation complete commands, *OPC or *OPC?.

Parameter: <None>

Response: <None>

Example: *CLS

This example clears the ESR, the error queue, and the RQS bit in the status byte.

*ESE IEEE-488 RS-232 Sequential

Overlapped

Event Status Enable command. This command loads a byte into the Event Status Enable (ESE) register. See the Event Status Enable Register (ESE) description in section 9.7.

Parameter: <value>

where <value> is the decimal equivalent of the ESE byte, 0 to 255

Response: <None>

Example: *ESE 140

This example loads decimal 140 (binary

10001100) to enable bits 7 (PON), 3 (DDE) and 2 (QYE).

*ESE? IEEE-488 RS-232 Sequential

Overlapped

Event Status Enable query. This command returns the contents of the Event Status Enable (ESE) register. See the Event Status Enable Register (ESE) description in section 9.7.

Parameter: <None>

Response: <value>

where <value> is the decimal equivalent of the

XXX

ESE byte, 0 to 255

Example: *ESE?

133

This example returns decimal 133 (binary

10000101) which indicates that bits 7 (PON), 2 (QYE), 1 (OPC) are enabled.

*ESR? IEEE-488 RS-232 Sequential

Overlapped

Event Status Register query. This command returns the contents of the Event Status Register (ESR) and clears the register. See the Event Status Register (ESR) description in section 9.7.

Parameter: <None>

Response: <value>

where <value> is the decimal equivalent of the ESR byte, 0 to 255

Example: *ESR?

This example returns decimal 61 (binary

00111101) which indicates that bits 5 (CME), 4 (EXE), 3 (DDE), 2 (QYE) and 0 (OPC) are enabled.

FAULT? IEEE-488 RS-232 Sequential

Overlapped

This command returns the most recent error code from the error queue. If the queue is empty (no errors have occurred) it returns 0. The command is normally used to verify that the previous command did what it was intended to do.

Parameter: <None>

Response: <value>

where <value> is one of the error codes documented in section 10.3.

Example: FAULT?

105

This example shows the error code which would occur if the previous command attempted to set a value above 100 mA for current output. The error code 105 indicates that the value was above the upper limit for the selected output range.

XXX

FUNC? IEEE-488 RS-232 Sequential

Overlapped

This command returns the present output, measurement, or calibration function for the primary and isolated displays.

Parameter: <None>

Response: <isolated>,<primary>

where <isolated> is one of the following:

DC10V measure DC voltage, 10V range DC100V measure DC voltage, 100V range DCI measure DC current PRESSURE measure pressure

and where <primary> is one of the following:

DCV source DC voltage DCI source DC current RTD_OUT source RTD/Ohms RTD_IN measure RTD/Ohms TC_OUT source thermocouple TC_IN measure thermocouple PRESSURE measure pressure

Example: FUNC?

DC10V,PRESSURE

This example indicates that the isolated display is selected to the 10V range and the primary display is selected to pressure.

HART? IEEE-488 RS-232 Sequential

Overlapped

This command returns the isolated DC current input HART resistor status.

Parameter: <None>

Response: <value>

where <value> is ON or OFF

Example: HART?

OFF

This example indicates that the isolated DC current input HART resistor is turned off.

XXX

HART_OFF IEEE-488 RS-232 Sequential

Overlapped

This command disables the isolated DC current input HART resistor.

Parameter: <None>

Response: <None>

Example: HART_OFF

This example disables the isolated DC current

input HART resistor.

HART_ON IEEE-488 RS-232 Sequential

Overlapped

This command enables the isolated DC current input HART resistor.

Parameter: <None>

Response: <None>

Example: HART_ON

This example enables the isolated DC current

input HART resistor.

*IDN? IEEE-488 RS-232 Sequential

Overlapped

This command returns the unit identification: instrument manufacturer, model number, serial number, and firmware revision level.

Parameter: <None>

Response: <text string>

where <text string> contains the following four fields separated by commas:

1. Manufacturer

2. Model number

3. Serial number (always 0)

4. Firmware revision level

Example: *IDN?

OMEGA, CL3001,0,1.2

This example indicates the manufacturer is Omega, the model is CL3001, the serial number is 0, and the firmware version is 1.2.

XXX

ISO_MEAS IEEE-488 RS-232 Sequential

Overlapped

This command sets the isolated measurement type.

Parameter: <value>

where <value> is one of the following:

DC10V measure DC voltage, 10V

range

DC100V measure DC voltage,

100V range

DCI measure DC current PRESSURE measure pressure

Response: <None>

Example: ISO_MEAS DCI

This example sets the isolated measurement to

DC current.

ISO_PRES_UNIT IEEE-488 RS-232 Sequential

Overlapped

This command sets the isolated pressure unit.

Parameter: <value>

where <value> is one of the following:

PSI pounds per square inch INH2O4C inches of water at 4 °C INH2O20C inches of water at 20 °C INH2O60F inches of water at 60 °F CMH2O4C centimeters of water at 4

°C

CMH2O20C centimeters of water at 20

°C

MMH2O4C millimeters of water at 4

°C

MMH2O20C millimeters of water at 20

°C

BAR bars MBAR millibars KPA kilopascals MPA megapascals INHG inches of mercury at 0 °C MMHG millimeters of mercury at

0 °C

KG/CM2 kilograms per square

centimeter

Response: <None>

Example: ISO_PRES_UNIT BAR

This example sets the isolated pressure unit to

bars.

ISO_PRES_UNIT? IEEE-488 RS-232 Sequential

Overlapped

This command returns the isolated pressure unit.

Parameter: <None>

Response: <value>

where <value> is one of the following:

PSI pounds per square inch INH2O4C inches of water at 4 °C INH2O20C inches of water at 20 °C INH2O60F inches of water at 60 °F CMH2O4C centimeters of water at 4

°C

CMH2O20C centimeters of water at 20

°C

MMH2O4C millimeters of water at 4

°C

MMH2O20C millimeters of water at 20

°C

BAR bars MBAR millibars KPA kilopascals MPA megapascals INHG inches of mercury at 0 °C MMHG millimeters of mercury at

0 °C

KG/CM2 kilograms per square

centimeter

Example: ISO_PRES_UNIT?

BAR

This example indicates that the isolated pressure

unit is bars.

XXX

LOCAL IEEE-488 RS-232 Sequential Overlapped

This command puts the CL3001 into the local state, clearing the remote state (see the REMOTE command) and the front panel lockout state (see the LOCKOUT command). It duplicates setting the IEEE-488 REN line to false.

Parameter: <None>

Response: <None>

Example: LOCAL

This example puts the instrument into the local state, clearing the remote state and front panel lockout state, if enabled.

LOCKOUT IEEE-488 RS-232 Sequential Overlapped

This command puts the CL3001 into the lockout state when in remote control (see the REMOTE command). In this state, no local operation is allowed at the front panel, including the LOCAL key. To clear the lockout condition, use the LOCAL command. This command duplicates the IEEE-488 LLO (Local Lockout) message.

Parameter: <None>

Response: <None>

Example: LOCKOUT

This example puts the instrument into the lockout state. No front panel controls can be used.

LOOP_POWER? IEEE-488 RS-232 Sequential

Overlapped

This command returns the isolated DC current input 24V loop power status.

Parameter: <None>

Response: <value>

where <value> is ON or OFF

Example: LOOP_POWER?

OFF

This example indicates that the isolated DC current input 24V loop power is turned off.

XXX

LOOP_POWER_OFF IEEE-488 RS-232 Sequential

Overlapped

This command disables the isolated DC current input 24V loop power.

Parameter: <None>

Response: <None>

Example: LOOP_POWER_OFF

This example disables the isolated DC current

input 24V loop power.

LOOP_POWER_ON IEEE-488 RS-232 Sequential

Overlapped

This command enables the isolated DC current input 24V loop power.

Parameter: <None>

Response: <None>

Example: LOOP_POWER_ON

This example enables the isolated DC current

input 24V loop power.

*OPC IEEE-488 RS-232 Sequential Overlapped

Operations Complete command. This command sets bit 0 (OPC) of the Event Status Register to 1 when all pending device operations are complete. Also see the *ESR? command.

Parameter: <None>

Response: <None>

Example: *OPC

This example sets bit 0 of the Event Status Register to 1 when all pending device operations are done.

*OPC? IEEE-488 RS-232 Sequential Overlapped

Operations Complete query. This command returns a 1 after all pending CL3001 operations are complete. This command does not respond until all pending CL3001 operations are complete, causing the control program execution to pause until operations are complete. Also see the *WAI command.

Parameter: <None>

XXX

Response: 1

Example: *OPC?

This example does not respond until all pending CL3001 operations are complete, and then returns

OPER IEEE-488 RS-232 Sequential Overlapped

This command places the CL3001 in operate mode, activating the output at front panel terminals. This command acts the same as pressing the front panel key when in standby mode.

Parameter: <None>

Response: <None>

Example: OPER

This example connects the selected output to the CL3001 front panel terminals. It also indicates Opr on the display.

OPER? IEEE-488 RS-232 Sequential

Overlapped

This command returns the present operate/standby mode setting.

Parameter: <None>

Response: <value>

where <value> is "1" for operate mode and "0" for

standby mode

Example: OPER?

This example indicates that the CL3001 is in

operate mode.

*OPT? IEEE-488 RS-232 Sequential

Overlapped

This command returns a list of the installed hardware and software options. This command is reserved for future use.

Parameter: <None>

Response: <text string>

where <text string> is "0" if no options are installed, or a list of installed options separated by commas

XXX

Example: *OPT?

The example indicates that no options are

installed.

OUT IEEE-488 RS-232 Sequential

Overlapped

This command sets the output mode and value of the CL3001. To source a temperature, select the desired mode and sensor parameters first with the TSENS_TYPE, RTD_TYPE, and TC_TYPE commands. Use the multiplier prefixes k for kilo, m for milli, and u for micro with the OUT command units, as desired. The unit may be omitted if the output mode is not to be changed.

Parameter: <value> <units>

where <value> is the output value to be generated

and where <units> is one of the following, with a possible prefix multiplier (k, m, or u) as described above:

V DC volts A DC current OHM Resistance CEL Temperature in Celsius FAR Temperature in fahrenheit

Response: <None>

Examples: Explanation

OUT 15.2 V Change to DC volts, output 15.2 V OUT 1.2 mA Change to DC current, output 1.2

mA, note units prefix multiplier m

OUT 5 Ohm Change to Resistance, output 5 O OUT 100 CEL Change to temperature in °C,

output 100 °C

OUT 3 No change to output mode,

output a value of 3 in the present units

OUT? IEEE-488 RS-232 Sequential

Overlapped

This command returns the present output value and units of the CL3001.

Parameter: <None>

Response: <value>,<units>

XXX

where <value> is the present output value

and where <units> is one of the following:

V DC volts A DC current OHM Resistance CEL Temperature in Celsius FAR Temperature in fahrenheit

Examples: Explanation

OUT?

1.88300E-02,A Present output is 18.83 mA

OUT?

1.23000E+00,V Present output is 1.23 V

OUT?

4.00000E+03,OHM Present output is 4.0 KO

OUT?

1.0430E+02,CEL Present output is 104.3 °C

PRES? IEEE-488 RS-232 Sequential

Overlapped

This command queries the attached pressure module for its manufacturer, serial number, and firmware version.

Parameter: <None>

Response: <text string>

where <text string> contains the following three fields separated by commas:

1. Manufacturer

2. Serial number

3. Firmware revision level (always 0)

Example: PRES?

OMEGA,610070,0

This example indicates that the manufacturer is Omega, the serial number is 610070, and the firmware version is 0.

PRES_MEAS IEEE-488 RS-232 Sequential

Overlapped

This command changes the primary display operating mode to pressure measurement.

Parameter: <None>

Response: <None>

XXX

Example: PRES_MEAS

This example changes the primary display operating mode to pressure measurement.

PRES_UNIT IEEE-488 RS-232 Sequential

Overlapped

This command sets the primary display pressure units.

Parameter: <value>

where <value> is one of the following:

PSI pounds per square inch INH2O4C inches of water at 4 °C INH2O20C inches of water at 20 °C INH2O60F inches of water at 60 °F CMH2O4C centimeters of water at 4 °C CMH2O20C centimeters of water at 20 °C MMH2O4C millimeters of water at 4 °C MMH2O20C millimeters of water at 20 °C BAR bars MBAR millibars KPA kilopascals MPA megapascals INHG inches of mercury at 0 °C MMHG millimeters of mercury at 0 °C KG/CM2 kilograms per square centimeter

Response: <None>

Example: PRES_UNIT BAR

This example sets the primary display pressure

units to bars.

PRES_UNIT? IEEE-488 RS-232 Sequential

Overlapped

This command returns the primary display pressure units.

Parameter: <None>

Response: <value>

where <value> is one of the following:

PSI pounds per square inch

XXX

INH2O4C inches of water at 4 °C INH2O20C inches of water at 20 °C INH2O60F inches of water at 60 °F CMH2O4C centimeters of water at 4 °C CMH2O20C centimeters of water at 20 °C MMH2O4C millimeters of water at 4 °C MMH2O20C millimeters of water at 20 °C BAR bars MBAR millibars KPA kilopascals MPA megapascals INHG inches of mercury at 0 °C MMHG millimeters of mercury at 0 °C KG/CM2 kilograms per square centimeter

Example: PRES_UNIT?

BAR

This example indicates that the primary pressure

display units are bars

RANGE? IEEE-488 RS-232 Sequential

Overlapped

This command returns the present DC voltage or current output range.

Parameter: <None>

Response: <value>

where <value> is one of the following:

V_0.1V DC volts, 100 mV range V_1V DC volts, 1V range V_10V DC volts, 10 V range V_100V DC volts, 100 V range A_0.1A DC current NONE neither volts nor current is selected

Example: RANGE?

V_10V

This example indicates that the present output

range is 10 V.

XXX

RANGELCK IEEE-488 RS-232 Sequential

Overlapped

This command locks or unlocks the DC voltage output range per the present output value.

Parameter: <value>

where <value> is one of the following:

ON to lock the present voltage range OFF to unlock the present voltage

range

Response: <None>

Example: RANGELCK ON

If the present DC voltage output is 5 V, this example locks the range at 10 VDC.

RANGELCK? IEEE-488 RS-232 Sequential

Overlapped

This command returns the DC voltage range lock status.

Parameter: <None>

Response: <value>

where <value> is one of the following:

ON DC voltage range lock is on OFF DC voltage range lock is off

Example: RANGELCK?

OFF

This example indicates that the range lock is off.

REMOTE IEEE-488 RS-232 Sequential

Overlapped

This command places the CL3001 into the remote state. It duplicates the IEEE-488 REN (Remote Enable) message. When the CL3001 is in the remote state, but not locked out, only the LOCAL key is active. If the front panel is also locked out, no front panel keys are active; see the LOCKOUT command. To unlock the front panel, use the LOCAL command, or cycle the CL3001 power switch.

Parameter: <None>

Response: <None>

Example: REMOTE

This example places the CL3001 into the remote

state.

XXX

*RST IEEE-488 RS-232 Sequential Overlapped

This command resets the CL3001 to the power-up state and holds off execution of subsequent commands until the reset operation is complete.

A reset action invokes the following commands and values for the primary display:

Command

Value

OUT 0 V PRES_UNIT Last selected RANGE 0.1 V RTD_TYPE Last selected STBY (No output) TC_REF INT TC_TYPE Last selected TSENS_TYPE Last selected

The isolated display and selections remain as they were last selected.

Parameter: <None>

Response: <None>

Example: *RST

This example resets the CL3001, invoking the commands and values shown above.

RTD_MEAS IEEE-488 RS-232 Sequential

Overlapped

This command places the primary display in RTD measure mode.

Parameter: <value>

where <value> is one of the following:

CEL display in degrees celsius FAR display in degrees fahrenheit <None> display in the last

selected temperature unit

Response: <None>

Example: RTD_MEAS CEL

This example sets the CL3001 to RTD measure mode, displaying in degrees celsius.

RTD_TYPE IEEE-488 RS-232 Sequential Overlapped

XXX

This command sets the Resistance Temperature Detector (RTD) sensor type for RTD source and measure. Normally, before using the RTD_TYPE command to select the RTD type, use the TSENS_TYPE command to select RTD mode, and afterwards set the output temperature using the OUT command, if applicable. A change in temperature sensors sets the output to 0 °C. Note that the SPRT can only be used to measure signals, not source them.

Parameters: <value>

where <value> is one of the following:

PT385_100 100-ohm RTD, curve a=0.00385 ohms/ohm/°C PT385_200 200-ohm RTD, curve a=0.00385 ohms/ohm/°C PT385_500 500-ohm RTD, curve a=0.00385 ohms/ohm/°C PT385_1000 1000-ohm RTD, curve a=0.00385 ohms/ohm/°C PT392_100 100-ohm RTD, curve a=0.003926 ohms/ohm/°C PTJIS_100 100-ohm RTD, curve a=0.003916 ohms/ohm/°C CU10 10-ohm RTD, empirical curve NI120 120-ohm RTD, empirical curve YSI_400 YSI thermistor curve OHMS_HIGH 4000 ohms range OHMS_LOW 400 ohms range SPRT standard PRT with user defined

error coefficients, only available for measurement

USR_DEF<x> RTD with user defined custom

coefficients, where x is the curve number and ranges from 1 to 5, i.e. USR_DEF2 for curve 2

Response: <None>

Example: RTD_TYPE PTJIS_100

This example sets the RTD sensor to a 100-ohm type, using the PT3916 curve (a=0.003916 ohms/ohm/°C). The resistance of 100 ohms refers to the ice point characteristic, the resistance of the RTD at 0 °C (32 °F).

RTD_TYPE? IEEE-488 RS-232 Sequential

Overlapped

This command returns the Resistance Temperature Detector (RTD) sensor type being used for RTD temperature source and measurement.

Parameter: <None>

Response: <value>

where <value> is one of the following:

error coefficients, only available for measurement

USR_DEF<x> RTD with user defined custom

coefficients, where x is the curve number and ranges from 1 to 5, i.e. USR_DEF2 for curve 2

Example: RTD_TYPE?

PTJIS_100

This example indicates that the RTD sensor type is a 100-ohm RTD with curve a=0.3916 ohm/°C.

*SRE IEEE-488 RS-232 Sequential

Overlapped

Service Request Enable command. This command loads a byte into the Service Request Enable (SRE) register. See the Service Request Enable Register (SRE) description in section 9.7. Since bit 6 is not used (decimal value 64), the maximum entry is 255 - 64 = 191.

XXX

Parameter: <value>

where <value> is the decimal equivalent of the SRE byte, 0 to 191

Response: <None>

Example: *SRE 48

This example enables bits 4 (MAV) and 5 (ESB).

*SRE? IEEE-488 RS-232 Sequential

Overlapped

Service Request Enable query. This command returns the byte in the Service Request Enable Register (SRE). See the Service Request Enable Register (SRE) description in section 9.7.

Parameter: <None>

Response: <value>

where <value> is the decimal equivalent of the SRE byte, 0 to 191

Example: *SRE?

This example indicates that bits 4 (MAV), and 5

(ESB) are enabled.

*STB? IEEE-488 RS-232 Sequential

Overlapped

Status Byte Register query. This command returns the byte in the Status Byte Register. See the Status Byte Register (STB) description in section 9.7.

Parameter: <None>

Response: <value>

where <value> is the decimal equivalent of the STB byte, 0 to 255

Example: * STB?

This example indicates that bits 5 (ESB) and 6

(MSS) are set.

STBY IEEE-488 RS-232 Sequential Overlapped

This command places the CL3001 in standby mode, deactivating the output at front panel terminals. This command acts the same as pressing the front panel key when in operate mode.

XXX

Parameter: <None>

Response: <None>

Example: STBY

This example disconnects the selected output from the CL3001 front panel terminals. It also indicates Stby on the display.

TC_MEAS IEEE-488 RS-232 Sequential

Overlapped

This command places the primary display in thermocouple measure mode.

Parameter: <value>

where <value> is one of the following:

CEL display in degrees celsius FAR display in degrees fahrenheit <None> display in the last selected temperature unit

Response: <None>

Example: TC_MEAS FAR

This example sets the CL3001 to thermocouple measure mode, displaying in degrees fahrenheit.

TC_REF IEEE-488 RS-232 Sequential Overlapped

This command selects the internal temperature sensor or an external reference value for cold junction compensation of thermocouple source and measurement.

Parameter: <value>

where <value> is one of the following:

INT use internal temperature sensor EXT use external reference value Response: <None>

Example: TC_REF EXT

This example sets the thermocouple reference to

external.

XXX

TC_REF? IEEE-488 RS-232 Sequential

Overlapped

This command returns the source of the temperature being used for cold junction compensation of thermocouple source and measurement.

Parameter: <None>

Response: <value>

where <value> is one of the following:

INT internal temperature sensor in use EXT external reference value in use

Example: TC_REF?

INT

This example indicates that the internal sensor is

in use.

TC_TYPE IEEE-488 RS-232 Sequential

Overlapped

This command sets the Thermocouple (TC) sensor type being used for TC temperature source and measurement. Normally, before using the TC_TYPE command to select the TC type, use the TSENS_TYPE command to select TC mode, and afterwards set the output temperature using the OUT command, if applicable. A change in temperature sensors sets the output to 0 °C.

Parameters: <value>

where <value> is one of the following:

B B-type thermocouple C C-type thermocouple E E-type thermocouple J J-type thermocouple K K-type thermocouple L L-type thermocouple N N-type thermocouple R R-type thermocouple S S-type thermocouple T T-type thermocouple U U-type thermocouple XK XK-type thermocouple BP BP-type thermocouple Z 1 mV/°C

Response: <None>

Example: TC_TYPE J

This example sets the thermocouple type to J-type.

XXX

TC_TYPE? IEEE-488 RS-232 Sequential

Overlapped

This command returns the Thermocouple (TC) sensor type being used for TC temperature source and measurement.

Parameter: <None>

Response: <value>

where <value> is one of the following:

Example: TC_TYPE?

This example indicates that the thermocouple

sensor type is K-type.

TSENS_TYPE IEEE-488 RS-232 Sequential

Overlapped

This command sets the temperature mode to thermocouple (TC) or Resistance Temperature Detector (RTD) for temperature source and measurement.

Parameters: <value>

where <value> is one of the following:

TC Thermocouple RTD Resistance Temperature Detector

Response: <None>

Example: TSENS_TYPE RTD

This example sets the temperature mode to RTD.

XXX

TSENS_TYPE? IEEE-488 RS-232 Sequential

Overlapped

This command returns the present temperature mode, thermocouple (TC) or Resistance Temperature Detector (RTD).

Parameter: <None>

Response: <value>

where <value> is one of the following:

TC Thermocouple RTD Resistance Temperature Detector

Example: TSENS_TYPE?

This example indicates that the present temperature mode is thermocouple.

*TST? IEEE-488 RS-232 Sequential

Overlapped

This command runs a series of self-tests and returns a "0" for pass or a "1" for fail. If any faults are detected, they are logged into the fault queue where they can be read by the FAULT? query.

Parameter: <None>

Response: <value>

where <value> is one of the following:

0 failed self test 1 passed self test

Example: *TST?

This example runs the self test and indicates that it

passed.

VAL? IEEE-488 RS-232 Sequential

Overlapped

This command returns the last values for the isolated and primary measurements, in that order.

Parameter: <None>

Response: <iso-value>,<iso-units>,<primary-

value>,<primary-units> where <iso-value> is the present isolated measurement expressed in scientific notation.

and where <iso-units> is one of the following:

XXX

V DC volts A DC current OVER measurement is over or under

range

or one of the pressure units listed

with the ISO_PRES_UNIT? command

and where <primary-value> is the present primary measurement expressed in scientific notation.

and where <primary-units> is one of the

following:

FAR °F CEL °C OHM Ohms V DC volts (thermocouple millivolts) OVER measurement is over or under range NONE primary display is presently set to a source mode

or one of the pressure units listed

with the PRES_UNIT? command

Example: VAL?

2.137000E+00,V,5.763300E+01,CEL

This example indicates that the isolated measurement is 2.137 volts and that the primary measurement is 57.633 °C.

*WAI IEEE-488 RS-232 Sequential

Overlapped

This command prevents further remote commands from being executed until all previous remote commands have been completed. For example, if you send an OUT command, you can cause the CL3001 to wait until the output has settled before continuing on to the next command if you follow OUT with a *WAI command. The *WAI command is useful with any overlapped command, preventing the CL3001 from processing other commands until the overlapped command is completed.

Parameter: <None>

Response: <None>

Example: OUT 1.1 V

*WAI

XXX

OPER FAULT?

This example demonstrates setting the CL3001 output to 1.1 volts, waiting for the output to settle before activating the output and checking if the sequence of commands completed successfully.

ZERO_MEAS IEEE-488 RS-232 Sequential

Overlapped

This command zeros a pressure module, the thermocouple mV offset, or the RTD ohms offset. For detailed zeroing instructions see section 4.3 for RTD ohms, section 4.7 for thermocouple millivolts, or section 4.9 for pressure.

Parameter: <None> for RTD ohms, thermocouple millivolts,

or a pressure module that does not measure absolute pressure

<value> is barometric pressure for absolute pressure modules, expressed in the currently selected pressure units

Response: <None>

Example: ZERO_MEAS

If thermocouple millivolts are currently selected, this example zeros the offset.

ZERO_MEAS? IEEE-488 RS-232 Sequential

Overlapped

This command returns the zero offset for pressure modules, thermocouple millivolts, or RTD ohms.

Parameter: <None>

Response: <zero offset>,<units>

where < zero offset > is the current offset.

and where <units> is one of the following:

OHM Ohms V DC volts (thermocouple millivolts)

or one of the pressure units listed

with the PRES_UNIT? command

Example: ZERO_MEAS?

1.060000E-01,PSI

This example indicates that the pressure zero for the attached module is 0.106 psi.

XXX

11. Maintenance

11.1 Cleaning the Calibrator

Warning

To avoid personal injury and/or damage to the Calibrator, use only the specified replacement parts and do not allow water into the case.

Caution

To avoid damaging the case, do not use solvents or abrasive cleaners.

Clean the calibrator and pressure modules with a soft cloth dampened with water, or mild soap and water.

11.2 Replacing a Line Fuse

Warning

To avoid electrical shock hazard disconnect line power before opening the case or fuse compartment.

The line power fuses and line voltage selector are located in the compartment above the power switch on the right rear of the Calibrator. See the rear panel layout in section 2.5.

Table 10 shows the correct replacement fuse for each line voltage setting.

Table 10 - Replacement Fuses

Fuse Description Line Voltage Setting

0.25 A/250 V fast 120 V (90 V to 132 V)

0.125 A/250 V fast 240 V (198 V to 264 V)

To check or replace a fuse:

1. Disconnect the line power.

2. Using the blade of a suitable flat screwdriver, pry up the tab at the base of the line fuse compartment by inserting the blade in the center slot under the tab. The compartment cover will pop part way out.

3. Remove the compartment cover. The fuses come out with the compartment cover and can easily be checked or replaced.

4. To reinstall the fuse holder, push the compartment cover back into the compartment until the tab locks in place.

11.3 Changing the Line Voltage

The calibrator arrives from the factory configured for the line voltage appropriate for the country of purchase, or as specified when it is ordered. To verify the line voltage setting, check the line voltage indicator on the power line fuse compartment cover.

Confirm that the line voltage selection is set for 120 V for line voltages between 90 V and 132 V, or that the selector is set to 240 V for line voltages between 198 V and 264 V.

Warning

To avoid electrical shock hazard disconnect line power before opening the case or fuse compartment.

To change the line voltage:

1. Disconnect line power.

3. Remove the compartment cover.

4. Remove the line voltage selector assembly by gripping the line voltage indicator tab with pliers and pulling it straight out of the compartment.

5. Rotate the line voltage selector assembly to the desired voltage and reinsert.

6. Verify you are using the appropriate fuse for the selected line voltage (see table 10 above), and reinstall the fuse compartment by pushing it in until the tab locks in place.

12. Specifications

12.1 General Specifications

Warm up time Twice the time since last warmed up, to a

maximum of 30 minutes.

Settling time Less than 5 seconds for all functions and

ranges except as noted.

Standard interfaces RS-232

IEEE-488 (GPIB)

Temperature performance Operating 0 °C to 50 °C

Calibration (tcal) 18 °C to 28 °C Storage -20 °C to 70 °C

Electromagnetic compatibility CE: Conforms to EN61326

Temperature coefficient Temperature coefficient for temperatures outside

tcal ±5 °C is 10% of the 90 day specification (or 1 year if applicable) per °C

Relative humidity Operating <80% to 30 °C

<70% to 40 °C <40% to 50 °C

Storage <95 % noncondensing

Altitude Operating 3,050 m (10,000 ft) maximum

Nonoperating 12,200 m (40,000 ft) maximum

Safety EN 61010 Second, ANSI/ISA-S82.01-

1994,CAN/CSA-C22.2 No. 1010.1-92, NRTL

Analog low isolation 20 V

Line power Line Voltage (selectable) 100V/120V or

220V/240V Line Frequency 47 to 63 Hz Line Voltage Variation ±10 % about

setting

Power consumption 15 VA maximum

Dimensions Height 13.3 cm (5.25 in) plus 2.9 cm

(1.15 in) for extended feet Width standard rack width (19 inch) Depth 30.0 cm (11.81 in) overall

Weight (without options) 4 kg (9 lb)

12.2 DC Voltage Specifications, Output

Absolute Uncertainty,

tcal ±5 °C

± (ppm of output +μV) Stability

24 hours, ±1 °C Maximum

Ranges

90 days 1 year

(ppm of output +μV)

Resolution Burden

0 to 100.000 mV 25 3 30 3 5 ppm +2 1 µV 10 mA

0 to 1.00000 V 25 10 30 10 4 ppm + 10 10 µV 10 mA

0 to 10.0000 V 25 100 30 100 4 ppm + 100 100 µV 10 mA

0 to 100.000 V 25 1 mV 30 1 mV 5 ppm + 1 mV 1 mV 1 mA

TC Output and Input

-10 to 75.000 mV 25 3 µV 30 3 µV 5 ppm + 2 µV 1 µV 10 Ω

1. All outputs are positive only.

2. Remote sensing is not provided. Output resistance is < 1Ω

Noise

Bandwidth 0.1 to 10 Hz p-p Bandwidth

Ranges ± (ppm of output +μV) 10 Hz to 10 kHz rms μV

0 to 100.000 mV 1 μV 6 μV

0 to 1.00000 V 10 μV 60 μV

0 to 10.0000 V 100 μV 600 μV

0 to 100.000 V 10 ppm+1 mV 20 mV

12.3 DC Voltage Specifications, Isolated Input

Absolute Uncertainty,

Ranges tcal ±5 °C, ± (ppm of reading + mV) Resolution

0 to 10.0000 V 50 0.2 100 µV

0 to 100.000 V 50 2.0 1 mV

12.4 DC Current Specifications, Output

Absolute Uncertainty,

tcal ±5 °C ± (ppm of output +μA) Maximum Maximum

Compliance Inductive

Ranges

90 days 1 year Resolution Voltage Load

0 to 100.000 mA 40 1 50 1 1 µA 12 V 100 mH

1. All outputs are positive only.

Noise

Bandwidth Bandwidth

Ranges

0.1 to 10 Hz p-p

10 Hz to 10 kHz rms μV

0 to 100.000 mA 2000 nA 20 μA

12.5 DC Current Specifications, Isolated Input

Absolute Uncertainty,

Ranges tcal ±5 °C, ± (ppm of reading + μA) Resolution

0 to 50.0000 mA 100 1 0.1 µA

1. Loop power: 24V ±10%

2. HART resistor: 250Ω ±3%

3. Maximum rated loop current: 24mA

12.6 Resistance Specifications, Output

Absolute Uncertainty,

tcal ±5 °C, ± ohms

Ranges

90 days 1 year Resolution Nominal Current

5 to 400.000 Ω 0.012 Ω 0.015 Ω 0.001 Ω 1 to 3 mA

5 to 4.00000 kΩ 0.25 Ω 0.3 Ω 0.01 Ω 100 µA to 1 mA

1. Continuously variable from 0 to 4 kΩ.

2. For currents lower than shown, the specification becomes: New Spec. = Stated Spec. x Imin / Iactual.

For example, a 500 µA stimulus measuring 100 Ω has a specification of:

0.015 Ω x 1 mA / 500 µA = 0.03 Ω.

12.7 Resistance Specifications, Input

Absolute Uncertainty,

tcal ±5 °C ± (ppm of reading + Ω)

Stimulus

Ranges 90 days 1 year Resolution Current

0 to 400.000 Ω ±20ppm + 0.035 Ω ±20ppm + 0.04 Ω 0.001 Ω 1 mA

0 to 4.00000 kΩ ±20ppm + 0.35 Ω ±20ppm + 0.4 Ω 0.01 Ω 0.1 mA

12.8 Thermocouple Specification, Output and Input

Absolute Uncertainty,

tcal ±5 °C, ±(°C)

Range (° C) Output/Input

TC Type Minimum Maximum 90 days 1 year

B 600 °C 800 °C 0.42 °C 0.46 °C

800 °C 1000 °C 0.39 °C 0.39 °C 1000 °C 1550 °C 0.40 °C 0.40 °C 1550 °C 1820 °C 0.44 °C 0.45 °C

C 0 °C 150 °C 0.25 °C 0.30 °C

150 °C 650 °C 0.21 °C 0.26 °C 650 °C 1000 °C 0.23 °C 0.31 °C 1000 °C 1800 °C 0.38 °C 0.50 °C 1800 °C 2316 °C 0.63 °C 0.84 °C

E -250 °C -100 °C 0.38 °C 0.50 °C

-100 °C -25 °C 0.16 °C 0.18 °C

-25 °C 350 °C 0.14 °C 0.15 °C 350 °C 650 °C 0.14 °C 0.16 °C 650 °C 1000 °C 0.16 °C 0.21 °C

J -210 °C -100 °C 0.20 °C 0.27 °C

-100 °C -30 °C 0.18 °C 0.20 °C

-30 °C 150 °C 0.14 °C 0.16 °C 150 °C 760 °C 0.14 °C 0.17 °C 760 °C 1200 °C 0.18 °C 0.23 °C

K -200 °C -100 °C 0.25 °C 0.33 °C

-100 °C -25 °C 0.19 °C 0.22 °C

-25 °C 120 °C 0.14 °C 0.16 °C 120 °C 1000 °C 0.19 °C 0.26 °C 1000 °C 1372 °C 0.30 °C 0.40 °C

L -200 °C -100 °C 0.37 °C 0.37 °C

-100 °C 800 °C 0.26 °C 0.26 °C 800 °C 900 °C 0.17 °C 0.17 °C

N -200 °C -100 °C 0.33 °C 0.40 °C

-100 °C -25 °C 0.20 °C 0.24 °C

-25 °C 120 °C 0.16 °C 0.19 °C 120 °C 410 °C 0.14 °C 0.18 °C 410 °C 1300 °C 0.21 °C 0.27 °C

1. Does not include thermocouple wire error.

2. Absolute Uncertainty is inclusive of any cold juction compensation error, which is not stated separately.

Thermocouple Specification, Output and Input (continued)

Absolute Uncertainty,

tcal ±5 °C, ±(°C)

Range (° C) Output/Input

TC Type Minimum Maximum 90 days 1 year

R 0 °C 250 °C 0.58 °C 0.58 °C

250 °C 400 °C 0.34 °C 0.35 °C 400 °C 1000 °C 0.31 °C 0.33 °C 1000 °C 1750 °C 0.30 °C 0.40 °C

S 0 °C 250 °C 0.56 °C 0.56 °C

250 °C 1000 °C 0.36 °C 0.36 °C 1000 °C 1400 °C 0.30 °C 0.37 °C 1400 °C 1750 °C 0.35 °C 0.46 °C

T -250 °C -150 °C 0.51 °C 0.63 °C

-150 °C 0 °C 0.18 °C 0.24 °C 0 °C 120 °C 0.13 °C 0.16 °C 120 °C 400 °C 0.12 °C 0.14 °C

U -200 °C 0 °C 0.56 °C 0.56 °C

0 °C 600 °C 0.27 °C 0.27 °C

XK -200 °C -100 °C 0.22 °C 0.22 °C

-100 °C 300 °C 0.12 °C 0.13 °C 300 °C 800 °C 0.19 °C 0.20 °C

BP 0 °C 200 °C 0.42 °C 0.42 °C

200 °C 600 °C 0.32 °C 0.32 °C 600 °C 800 °C 0.39 °C 0.40 °C 800 °C 1600 °C 0.45 °C 0.46 °C 1600 °C 2000 °C 0.57 °C 0.58 °C 2000 °C 2500 °C 0.67 °C 0.80 °C

1. Does not include thermocouple wire error.

12.9 RTD and Thermistor Specification, Output

Absolute Uncertainty,

tcal ±5 °C, ±(°C)

Range (° C) Output/Input

RTD Type Minimum Maximum 90 days 1 year

Pt 385, 100 Ω -200 °C -80 °C 0.03 °C 0.04 °C

-80 °C 0 °C 0.04 °C 0.05 °C 0 °C 100 °C 0.04 °C 0.05 °C 100 °C 300 °C 0.03 °C 0.04 °C 300 °C 400 °C 0.04 °C 0.04 °C 400 °C 630 °C 0.04 °C 0.05 °C 630 °C 800 °C 0.04 °C 0.05 °C

Pt 3926, 100 Ω -200 °C -80 °C 0.03 °C 0.04 °C

-80 °C 0 °C 0.03 °C 0.04 °C 0 °C 100 °C 0.03 °C 0.04 °C 100 °C 300 °C 0.03 °C 0.04 °C 300 °C 400 °C 0.03 °C 0.04 °C 400 °C 630 °C 0.04 °C 0.05 °C

Pt 3916, 100 Ω -200 °C -190 °C 0.03 °C 0.03 °C

-190 °C -80 °C 0.03 °C 0.04 °C

-80 °C 0 °C 0.03 °C 0.04 °C 0 °C 100 °C 0.03 °C 0.04 °C 100 °C 260 °C 0.03 °C 0.04 °C 260 °C 300 °C 0.03 °C 0.04 °C 300 °C 400 °C 0.03 °C 0.04 °C 400 °C 600 °C 0.04 °C 0.05 °C 600 °C 630 °C 0.04 °C 0.05 °C

Pt 385, 200 Ω -200 °C -80 °C 0.31 °C 0.38 °C

-80 °C 0 °C 0.32 °C 0.38 °C 0 °C 100 °C 0.33 °C 0.39 °C 100 °C 260 °C 0.33 °C 0.39 °C 260 °C 300 °C 0.36 °C 0.43 °C 300 °C 400 °C 0.36 °C 0.43 °C 400 °C 600 °C 0.42 °C 0.50 °C 600 °C 630 °C 0.42 °C 0.50 °C

Pt 385, 500 Ω -200 °C -80 °C 0.13 °C 0.15 °C

-80 °C 0 °C 0.13 °C 0.15 °C 0 °C 100 °C 0.13 °C 0.16 °C 100 °C 260 °C 0.14 °C 0.17 °C 260 °C 300 °C 0.14 °C 0.17 °C 300 °C 400 °C 0.15 °C 0.18 °C 400 °C 600 °C 0.16 °C 0.19 °C 600 °C 630 °C 0.16 °C 0.19 °C

1. 2-wire output

RTD and Thermistor Specification, Output (continued)

Absolute Uncertainty,

tcal ±5 °C, ±(°C)

Range (° C) Output/Input

RTD Type Minimum Maximum 90 days 1 year

Pt 385, 1000 Ω -200 °C -80 °C 0.06 °C 0.07 °C

-80 °C 0 °C 0.06 °C 0.08 °C 0 °C 100 °C 0.07 °C 0.08 °C 100 °C 260 °C 0.07 °C 0.08 °C 260 °C 300 °C 0.07 °C 0.09 °C 300 °C 400 °C 0.07 °C 0.09 °C 400 °C 600 °C 0.08 °C 0.09 °C 600 °C 630 °C 0.08 °C 0.09 °C

Ni 120, 120 Ω -80 °C 0 °C 0.02 °C 0.02 °C

0 °C 100 °C 0.02 °C 0.02 °C 100 °C 260 °C 0.01 °C 0.02 °C

Cu 427, 10 Ω -100 °C 260 °C 0.30 °C 0.38 °C

YSI 400 15 °C 50 °C 0.005 °C 0.007 °C

1. 2-wire output

12.10 RTD and Thermistor Specification, Input

Absolute Uncertainty,

tcal ±5 °C, ±(°C)

Range (° C) Output/Input

RTD Type Minimum Maximum 90 days 1 year

Pt 385, 100 Ω -200 °C -80 °C 0.011 °C 0.012 °C

-80 °C 0 °C 0.018 °C 0.020 °C 0 °C 100 °C 0.018 °C 0.020 °C 100 °C 300 °C 0.027 °C 0.030 °C 300 °C 400 °C 0.031 °C 0.035 °C 400 °C 630 °C 0.042 °C 0.047 °C 630 °C 800 °C 0.050 °C 0.057 °C

Pt 3926, 100 Ω -200 °C -80 °C 0.011 °C 0.011 °C

-80 °C 0 °C 0.014 °C 0.015 °C 0 °C 100 °C 0.018 °C 0.019 °C 100 °C 300 °C 0.026 °C 0.029 °C 300 °C 400 °C 0.031 °C 0.034 °C 400 °C 630 °C 0.041 °C 0.046 °C

Pt 3916, 100 Ω -200 °C -190 °C 0.006 °C 0.006 °C

-190 °C -80 °C 0.011 °C 0.012 °C

-80 °C 0 °C 0.014 °C 0.015 °C 0 °C 100 °C 0.018 °C 0.019 °C 100 °C 260 °C 0.025 °C 0.028 °C 260 °C 300 °C 0.026 °C 0.029 °C 300 °C 400 °C 0.031 °C 0.034 °C 400 °C 600 °C 0.040 °C 0.045 °C 600 °C 630 °C 0.042 °C 0.047 °C

Pt 385, 200 Ω -200 °C -80 °C 0.008 °C 0.009 °C

-80 °C 0 °C 0.012 °C 0.013 °C 0 °C 100 °C 0.015 °C 0.017 °C 100 °C 260 °C 0.020 °C 0.022 °C 260 °C 300 °C 0.050 °C 0.053 °C 300 °C 400 °C 0.053 °C 0.057 °C 400 °C 600 °C 0.070 °C 0.075 °C 600 °C 630 °C 0.071 °C 0.076 °C

Pt 385, 500 Ω -200 °C -80 °C 0.007 °C 0.008 °C

-80 °C 0 °C 0.019 °C 0.020 °C 0 °C 100 °C 0.023 °C 0.025 °C 100 °C 260 °C 0.030 °C 0.033 °C 260 °C 300 °C 0.032 °C 0.035 °C 300 °C 400 °C 0.037 °C 0.041 °C 400 °C 600 °C 0.047 °C 0.052 °C 600 °C 630 °C 0.048 °C 0.053 °C

1. 4-wire mode. Uncertainties listed do not include probe uncertainties.

RTD and Thermistor Specification, Input (continued)

Absolute Uncertainty,

tcal ±5 °C, ±(°C)

Range (° C) Output/Input

RTD Type Minimum Maximum 90 days 1 year

Pt 385, 1000 Ω -200 °C -80 °C 0.011 °C 0.012 °C

-80 °C 0 °C 0.014 °C 0.015 °C 0 °C 100 °C 0.019 °C 0.020 °C 100 °C 260 °C 0.025 °C 0.028 °C 260 °C 300 °C 0.027 °C 0.030 °C 300 °C 400 °C 0.030 °C 0.034 °C 400 °C 600 °C 0.041 °C 0.045 °C 600 °C 630 °C 0.042 °C 0.047 °C

Ni 120, 120 Ω -80 °C 0 °C 0.009 °C 0.010 °C

0 °C 100 °C 0.010 °C 0.011 °C 100 °C 260 °C 0.011 °C 0.012 °C

Cu 427, 10 Ω -100 °C 260 °C 0.067 °C 0.069 °C

YSI 400 15 °C 50 °C 0.005 °C 0.007 °C

SPRT -200 °C 660 °C 0.05 °C 0.06 °C

1. 4-wire mode. Uncertainties listed do not include probe uncertainties

Omega CL3001 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual