Vitrek Xitron 2000 Series, Xitron 2000MN, Xitron 2000I, Xitron 2000M, Xitron 2000IN User Manual
USER GUIDE
2000 Family
DC / Temperature Source
Instruments
Warranty
This Vitrek instrument is warranted against defects in material and workmanship for
a period of two years after the date of purchase. Vitrek agrees to repair or replace any
assembly or component (except batteries) found to be defective, under normal use,
during the warranty period. Vitrek's obligation under this warranty is limited solely
to repairing any such instrument, which in Vitrek's sole opinion proves to be
defective within the scope of the warranty, when returned to the factory or to an
authorized service center. Transportation to the factory or service center is to be
prepaid by the purchaser. Shipment should not be made without prior authorization
by Vitrek.
This warranty does not apply to any products repaired or altered by persons not authorized by Vitrek or not in accordance with instructions provided by Vitrek. If the
instrument is defective as a result of misuse, improper repair, or abnormal conditions
or operations, repairs will be billed at cost.
Warranty 3
Vitrek assumes no responsibility for its product being used in a ha-zardous or
dangerous manner, either alone or in conjunction with other equipment. Special
disclaimers apply to this instrument. Vitrek assumes no liabili-ty for secondary
charges or consequential damages, and, in any event, Vitrek's liability for breach of
warranty under any contract or otherwise, shall not exceed the original purchase
price of the specific instrument shipped and against which a claim is made.
Any recommendations made by Vitrek or its representatives, for use of its products
are based upon tests believed to be reliable, but Vitrek makes no warranties of the
results to be obtained. This warranty is in lieu of all other warranties, expressed or
implied and no representative or person is authorized to represent or assume for
Vitrek any liability in connection with the sale of our products other than set forth
herein.
Instrument Serial Number:______________________________________________
2000I & 2000M Instrument’s User Guide, Revision B
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Document Part Number MO-2000-M Revision C
Copyright
Copyright© 2019 Vitrek. All rights reserved.
Vitrek
All rights reserv
ed. No part of this publication may be reproduced, transmitted,
transcribed, stored in a retrieval system, or translated into any language in any
form with prior written consent from Vitrek. This product’s user guide is
copyrighted and contains proprietary information, which is subject to change
without notice. The product displays and instructional text may be used or copied
only in accordance with the terms of the license agreement.
is a trademark of Vitrek. All other trademarks or
registered trademarks are ackno
wledged as the exclusive property of their
respective owners.
In the interest of continued product development, Vitrek reserves the right to
make changes in this guide and the product it describes at any time, without
notice or obligation.
12169 Kirkham Road
Poway, CA 92064
Telephone: 858–689-2755
Email: info@vitrek.com
Contents
Warranty _______________________________________________ 3
Introduction _____________________________________________ 9
Front Panel Controls and Connections _______________________ 11
Contents 5
Product Description _________________________________________ 9
Features _________________________________________________ 10
Display __________________________________________________ 11
“POWER” Switch _________________________________________ 11
Battery Indicators __________________________________________ 12
Red “BATT CHG” Light _________________________________ 12
Green “OK” Light _______________________________________ 12
“OUTPUT” Terminals ______________________________________ 12
Keypad __________________________________________________ 13
Numeric Keys __________________________________________ 13
+/– Key _______________________________________________ 13
Arrow Keys ____________________________________________ 13
Multiplier Keys _________________________________________ 13
Units/Enter Keys ________________________________________ 14
“CLR” Key ____________________________________________ 14
“MNU” Key ___________________________________________ 14
Rear Panel Connections and Controls ________________________ 15
Charging Connector ________________________________________ 15
Compensated Thermocouple Connection _______________________ 15
Interface Connectors _______________________________________ 16
2000-IE-BAT Connector __________________________________ 16
2000-
RS-BAT Connector _________________________________ 16
Rear Panel Switch _________________________________________ 16
Charging the Battery _____________________________________ 19
The Internal Battery ________________________________________ 19
2000I & 2000M Instrument’s User Guide, Revision B
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To Charge the Battery ____________________________________ 19
Charging Status _________________________________________ 20
Charging from the Charging Module ___________________________ 20
Charging Modules _______________________________________ 21
Charging from an External DC Voltage Supply __________________ 22
Continuous Power from External Supply _______________________ 22
Operating the 2000 Instrument _____________________________ 23
Front Panel Operation ______________________________________ 23
Initial Power Application _________________________________ 23
Connecting to the OUTPUT Terminals ______________________ 24
Displaying Instrument Status ______________________________ 24
Numeric Data Entry _____________________________________ 26
Direct Entry of Required Output Level _______________________ 27
Changing Displayed Multiplier _____________________________ 28
Direct Entry of Temperature Data ___________________________ 29
Reversing Polarity of the Present Output Level ________________ 29
Adjusting Output Level or Simulated Temperature _____________ 30
Increasing or Decreasing Output Level _______________________ 31
Changing Adjustment Value _______________________________ 32
Terminating Adjust mode _________________________________ 32
Selecting Default Power on Condition _______________________ 32
Range Locking _________________________________________ 33
Calculating Output Mode of Operation _______________________ 34
Selecting Measurement Mode ______________________________ 37
Deselecting Measurement Mode ____________________________ 37
Rear Panel Operation _______________________________________ 38
Using Thermocouple Simulation ___________________________ 38
Deselecting Thermocouple Simulation Mode __________________ 41
Using the Memory Options ________________________________ 43
Memory Organization ______________________________________ 43
Front Panel Memory _____________________________________ 43
Rear Panel Memory ______________________________________ 45
General Memory Considerations ___________________________ 46
Applications ___________________________________________ 48
Low-level DC Power _______________________________________ 48
Ensuring Stable Voltage Connections ________________________ 49
Contents
Ensuring Stable Current Connections ________________________ 50
Process Control Industry Applications__________________________ 52
Calibrating in Process Control Environments __________________ 52
Simulating Thermocouple Systems __________________________ 55
Measuring Thermocouple Outputs __________________________ 56
Engineering Laboratory Environment Applications _____________ 57
Calibration and Maintenance ______________________________ 61
Internal Calibration ________________________________________ 61
External Calibration ________________________________________ 62
Equipment Required to Recalibrate _________________________ 62
Initiating External Calibration ______________________________ 64
Performing External Calibration ____________________________ 65
Periodic Maintenance _______________________________________ 71
Internal Maintenance _______________________________________ 72
Replacing the Internal Battery ________________________________ 73
Interface Operation ______________________________________ 75
RS232 Interface Option _____________________________________ 75
Selecting RS232 ________________________________________ 76
RS232 Handshake Lines __________________________________ 76
IEEE488 Interface Option ___________________________________ 76
Remote/Local Operation __________________________________ 77
Address Selection _______________________________________ 77
IEEE488 Handshake Lines ________________________________ 77
Bus Commands _________________________________________ 78
Other IEEE488 Specific Items _____________________________ 78
Reading Data Via an Interface ________________________________ 79
Sending Data Via an Interface ________________________________ 79
Command Set for the 2000 Instrument _________________________ 79
Keypress, Simulation Command Characters ___________________ 79
Firmware Version F.02 ___________________________________ 81
Extended Command Set __________________________________ 81
Command String Usage _____________________________________ 82
Setting an Output Voltage or Current ________________________ 82
Adjusting Output Level ___________________________________ 83
Reading Present Output Level ______________________________ 83
Internal Calibration ________________________________________ 83
External Calibration ________________________________________ 84
7
2000I & 2000M Instrument’s User Guide, Revision B
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Appendix A– Output Specifications _________________________ 85
DC Voltage Output Specifications _____________________________ 85
DC Current Output Specifications _____________________________ 86
Voltage Measurement Specifications ___________________________ 87
Thermocouple Specifications _________________________________ 87
Appendix B– General Specifications ________________________ 93
Warm-Up Time _________________________________________ 94
Environmental __________________________________________ 94
Isolation _______________________________________________ 94
Computation ___________________________________________ 94
Tables
Table 1: Resistance Values for Transfer 58
Table 2: Voltage Accuracy Margins 62
Table 3: Current Accuracy Margins 63
Table 4: Command Characters 80
Table 5: Shortcut Command Character Sequences 80
Table 6: Extended Command Set 81
Table 7: DC Voltage Output 85
Table 8: DC Current Output 86
Table 9: Thermocouple Simulation and Measurement Specifications 88
Table 10: CJC Stability-Simulation and Measurement 89 & 90
Introduction
This chapter describes the 2000I, 2000M, 2000IN and 2000MN DC power source
instruments and highlights their features and functionalities. The 2000 instruments were introduced in 1989 to support the fields of Process Control, Calibration, and General Equipment Testing.
Product Description
The 2000I, 2000M, 2000IN and 2000MN products are portable, lightweight DC
power source instruments. Their capabilities include the generation of precision
bipolar DC voltages
tion of a variety of thermocouple types with optional active cold junction compensation; and measurement of voltage and thermocouple outputs. On a 2000
instrument, you may enter a scaling factor, an offset factor and a “units” text
string, which enables the calibration of four 20mA loops in the “actual” units and
scaling of the transducer. Optional IEEE488 or RS232 isolated interfaces further
enhance the 2000 instruments, allowing them to be used in varying applications.
Introduction 9
1
; precision bipolar DC currents2; the high accuracy simula-
The 2000I, 2000M, 2000IN and 2000MN 2000MN instruments use microprocessor and digital-analog conversion technologies to produce highly flexible, accurate instruments with high reliability. The combination of HCMOS
microprocessor technologies with low-power precision analog circuitry yields a
long battery life while maintaining a lightweight rugged package and a 0.5ppm
analog output resolution.
Automatic internal calibration and simple front panel (covers on) external calibration maintain high accuracy. A comprehensive range of computational abilities
enable a variety of applications.
1
DC voltage expands up to 22V and down to 10nV resolution
2
DC current expands up to 22mA and down to 10pA resolution
2000I & 2000M Instrument’s User Guide, Revision B
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Note: To ensure full use of this instrument, review this complete user guide at
setup.
Features
Fully bi-polar DC voltage and current output capability.
DC output of 22 volts at 10ppm accuracy and 22mA at 40ppm accuracy.
Temperature simulation with 0.01 degree resolution, 0.03 – 0.06 degree
accuracy.
Temperature measurement with 0.1 – 0.2 degree accuracy.
Auto cold-junction compensation.
Battery or line operation.
Suited for “in field” calibration requirements of the process control indus-
try.
Portable for use in remote sites.
Functions as a “transducer replacement” with computed output levels and
enabled data entry in: psi, KPa, mmHg, and g/sec units.
Able to calibrate at the “sending” unit.
2000M and 2000MN instruments perform thermocouple simulations.
Connects in parallel with a transducer 4 -20mA output enabling to modify
its output interfaces.
Small size and weight
Low noise performance
IEEE488: Full Talk/Listen capabilities. Isolated from output circuitry up to
500V peak
RS232: Full Talk/Listen capabilities. Selectable baud of 1200 or 19,200
baud. Isolated from output circuitry up to 500V peak.
Front Panel Controls and Connections 11
Front Panel Controls and Connections
This chapter discusses the basic use of the various controls, connectors and indicators on the front panel of the 2000I, 2000M, 2000IN and 2000MN DC power
source instruments.
the Battery.
ic tasks refer to Front Panel Operation.
Display
The 2000 Families DC power source
instrument display is a 16 character,
single line reflective liquid crystal
(LCD). This display shows selectable
status or the present output of the
instrument.
For a
Before using your instrument refer to the text on Charging
complete discussion on the methods used to perform specif-
During interactive sequences the display enables you to select a mode and
enter a value for your desired output,
calculation or measurement
The 2000 Instrument
“POWER” Switch
This toggle switch controls the power applied to the circuitry in the instrument.
Note that the charging module is always connected to the charging control circuitry in the instrument, thus the POWER switch does not control the charging of the
battery.
.
2000I & 2000M Instrument’s User Guide, Revision B
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When the POWER switch is toggled up, in the ON position, the microprocessor
and analog circuitry is powered and the instrument may be operated normally.
The power source may be either from the battery or the charging module, as applicable. When the power switch is toggled down, in the OFF position, the only
operation enabled is charging the internal battery.
Battery Indicators
These indicators reflect the status of the lead-acid battery (2000I, 2000M) and the
Nickel Metal Hydride batteries used (2000IN and 2000MN).
Red “BATT CHG” Light
This red light (LED) illuminates when the internal battery is being charged. Upon
full charge this light extinguishes.
Green “OK” Light
This green light (LED) illuminates when the power switch is turned on for 2000I
and 2000M. For the 2000IN and 2000MN products, the Green LED is used as a
Fuel Status indicator as well as showing that the unit is powered on. It is recommended that the unit is plugged in to the supplied power supply when the Green
LED begins to flash
Note: To continue using if the light extinguishes, connect the instrument to a
charging module or an external DC supply, turn the unit off and then back on to
reset the internal cutoff circuitry.
“OUTPUT” Terminals
All output voltages, currents and temperatures are available from this pair of
binding posts mounted on the instrument’s front panel. These terminals, one red,
one black, accept banana plugs, spade leads or wires, as required.
Front Panel Controls and Connections 13
Keypad
These 20 keys are used for all manual entries into the instrument and to initiate
any required actions. These keys are in the following groups:
Numeric Keys
These keys: “0, 1, 2, 3, 4, 5, 6, 7, 8, 9,” and “.”are used to enter numeric data
into the instrument. While the display is showing the actual output level, these
keys initiate a numeric entry of a new output level; this entry will be completed
by pressing the required unit’s key.
+/– Key
The change sign (+/–) key may be used during a numeric entry to change the
polarity of the entered data. If this key is pressed while the actual output level is
being displayed (i.e., when not in a numeric entry) then the output level is reversed (i.e., the output polarity is changed).
Arrow Keys
During a menu selection, and during the “Adjust” mode, the “2, 4, 6 and 8” keys
are arrow keys, which scroll through various actions that show in the display.
These keys are used to select the
previous displayed action.
These keys are used to select the
next action.
To abort the selection of an activity and return the instrument to its previous condition, press the MNU key.
4 key has a (left arrow)
2 key has a (down arrow)
6 key has a(right arrow)
8 key has an (up arrow)
Multiplier Keys
The “m” (milli) key and µ (micro) key are used during a numeric entry to select
the required multiplier for the entered data. If the m key is pressed then the en-
tered numeric is divided by one thousand. If the µ key is pressed then the entered
data is divided by one million.
2000I & 2000M Instrument’s User Guide, Revision B
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Note that prior to selecting the required units key, an entered multiplier may be
changed by pressing the other multiplier or cleared by pressing the multiplier key
a second time. Pressing a multiplier key while an actual output level or measured
input level is being displayed (i.e., not during numeric entry) changes the display.
If the multiplier key is different from the display, then the display format
changes to use the selected multiplier.
If the multiplier key is the same as the display, it toggles the usage of the
selected multiplier in the display format.
Units/Enter Keys
The V, A, ºC and ºF keys are encircled within a white line on the keypad. These
keys are used to output in the selected units, which terminates a numeric entry.
They can also select the displayed action. For example in “Measure” mode
(2000M only) the V,
the measured data.
A, ºC and ºF keys are used to change the displayed units of
“CLR” Key
This key is used to reinitiate a numeric entry (i.e., clear the display ready for restarting the entry), or during a choice selection, this key aborts the action in
progress. During the “Adjust” mode of operation, this key deselects that mode
with the output remaining at the present level.
“MNU” Key
This key is used to select one of the “special” activities of the instrument. When
initially pressed, you are prompted to select the desired action. Press any of the
keys that have an arrow (2, 4, 6 or 8) to scroll through the textual options to display the required selection and then press a unit’s key to execute it.
Rear Panel Connections and Controls 15
Rear Panel Connections and Controls
This chapter discusses the basic use of the various controls and connectors located on the rear panel of the 2000I, 2000M, 2000IN and 2000MN power source
instruments. For a
tasks refer to Front Panel Operation.
Charging Connector
This connector, located on the rear panel in the lower right-hand corner, is the
receptacle for the connector of the charging module. See Charging the Battery
for further details regarding the usage of this connector.
complete discussion of the methods used to perform specific
Important Note: When connecting a charger other than that provided by
Vitrek, ensure the selected charger’s output voltage is: 12V at 1.5A and the
center conductor is positive polarity and uses 2.5mm DC plug.
Compensated Thermocouple Connection
This thermocouple output and measurement connections are only present on the
2000M and 2000MN instruments. Use this connection whenever the active cold
junction compensation (CJC) mode of thermocouple simulation or measurement
is being used.
This thermocouple connection, located in the lower center back of the instrument,
is wired in parallel with the output terminals on the front panel. Thus normal output voltages or currents can be obtained using an uncompensated connection.
During calibration of thermocouple measuring instruments, be sure to use
mocouple wire between the 2000M or 2000MN instrument and the unit being
calibrated.
ther-
2000I & 2000M Instrument’s User Guide, Revision B
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Interface Connectors
A connector slot is available at the top center in the back panel. A connector in
this location is only present when either of the interface options IE-BAT or RSBAT is fitted in the instrument.
IE-BAT Connector
This is a standard IEEE488 connector, and is fitted if option IE-BAT is fitted in
the instrument. The usage of this connector and the method of using the IEEE488
interface are fully described in the Interface Operations chapter.
RS-BAT Connector
This is a female 9-pin sub-miniature D type connector, and contains the RS232
connections for the RS-BAT option of the instrument. The connections are as
follows:
1. Data Carrier Detect (Output from instrument)
2. Transmit Data (Output from instrument)
3. Receive Data (Input to instrument)
4. Data Terminal Ready (Input to instrument)
5. Ground (Common return for these signals)
6. Data Set Ready (Output from instrument)
7. Request To Send (Input to instrument)
8. Clear To Send (Output from instrument)
9. Ring Indicate (Output from instrument)
Note: These connections enable using a straight through connected cable to an
IBM AT® compatible RS232 connector. Use of this connector and the RS232
interface is fully described in the Interface Operations chapter.
Rear Panel Switch
The rear-panel mounted toggle switch is only present when the IE-BAT option is
fitted in the instrument. When ON (up position), the internal interface is enabled
for operation and is disabled when OFF (down position).
Rear Panel Connections and Controls 17
Note that the battery life is considerably shortened when the IE-BAT Interface is
enabled, thus it is highly recommended that this switch be maintained in the OFF
(down) position whenever this interface is not being used. The IE-BAT Interface
is only usable when this switch is in the ON position.
2000I & 2000M Instrument’s User Guide, Revision B
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Charging the Battery
This chapter discusses the methods available for charging the internal battery and
for continuously powering the 2000 instruments from an AC power supply.
Charging the Battery 19
Note: Charge the
time taken to recharge will be extended when the instrument is in this condition.
battery with the IE-BAT interface option enabled, although the
The Internal Battery
The 2000 instruments are powered from an internal sealed lead-acid battery
(2000I and 2000M) or a Nickel Metal Hydride battery for the 2000IN and
2000MN product builds. The battery is fully charged when shipped from Vitrek.
During shipping or storage the battery may discharge. We recom-mend the
battery be recharged for at least 12 hours prior to its initial use. Use the charging
unit provided Vitrek to charge the internal battery and to operate this instrument.
Ensure that the included charging unit is compatible with your local power
ratings and socket connection.
Caution: If using an external DC supply other than the provided charger ensure
the selected charger’s output voltage is: 12V at 1.5A and the center conductor is
positive polarity, the DC connector is a 2.5mm Power Jack.
To Charge the Battery
A full charge to the internal battery is achieved by inserting the small plug of the
charging unit into the socket in a recess of the rear panel and then plugging the
charging unit into a suitable AC power outlet.
2000I & 2000M Instrument’s User Guide, Revision B
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Charging Status
For battery charge status, refer to the front panel’s red BATT CHG light.
If the BATT CHG light extinguishes then the battery is fully charged.
If the BATT CHG light does not extinguish after several hours of charg-
ing, turn the unit OFF and back ON (2000I and 2000M Only).
If the light remains illuminated then continue to charge the unit for a few
more hours and retry turning the unit OFF and back ON.
And if the light still does not extinguish then replace the unit’s battery.
Charging from the Charging Module
If the internal battery has become discharged, recharge it by plugging the DC
output plug on the Charging Module’s cable end into the recessed receptacle on
the instrument’s rear panel and plugging the Charging Module into the local AC
supply. Ensure that the voltage rating of the Charging Module is in accordance
with the local AC supply voltage.
Note: For the fastest possible recharging time, place the front panel POWER
switch in the OFF position.
While charging the internal battery, the BATT CHG light will be illuminated.
When this LED becomes extinguished, the internal battery is fully charged.
The instrument can be operated while it’s charging. Note that when doing so, to
fully charge the internal battery may take up to 15 hours. If the instrument is not
operated during charging then a full charge will take up to 12 hours.
Caution: If the instrument is connected to other circuitry or instrumentation
when the Charging Module is connected, ensure that less than 500V of common
mode potential to ground is present; SEVERE DAMAGE could result if excessive common mode voltages are present.
Charging the Battery 21
Warning: Prior to recharging the internal battery disconnect the 2000 instru-
ment from any intrinsically-safe process control system. Charging while connected could adversely affect the safety of the process control system.
Charging Modules
One of these modules is included with the main unit (as specified at the time of
order). Additional charging modules may be obtained using the codes described
below.
“M02000”
This option delivers an additional copy of this user guide. If not included at the
time of placing the order for the basic unit, please have the serial number of your
unit available when making this order.
“MS2000”
This option delivers a full service manual, incorporating schematics, assembly
diagrams, fault diagnosis aids and full servicing information. If not included at
the time of placing the order for the basic unit, please have the serial number of
your unit available when making this order.
“SP48”
A 48” long shielded cable with low thermal spade lugs terminating each lead. Use
this leads for applications requiring superior performance at levels below 1μV.
“PL36”
A 36” long shielded cable with low thermal plugs terminating each lead. This
lead should be used for applications requiring superior performance at levels below lµV.
“T1”
A wall-mount charger with 120VAC input and 12VDC @ 1.5A minimum output.
(This version has been obsoleted; The T5 is the recommended replacement)
2000I & 2000M Instrument’s User Guide, Revision B
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“T5”
A free-standing, universal charger with 85VAC - 265VAC input and 12VDC @
1.5A minimum output.
Charging from an External DC Voltage Supply
Similarly, the instrument may have its internal battery charged from an external
DC voltage supply of between 10V and 15V, with at least 1.5A of drive capability. If this is desired, obtain a DC power jack, which meets the requirements of
2.5mm pin diameter and 5.5mm external diameter. For example: Switchcraft®
760. The center pin connector should be a positive potential connection, note that
internal circuitry prevents damage from polarity reversal.
The DC power supply used may be any laboratory type of power supply or alternatively a 12V lead-acid battery (e.g., an automobile battery). This latter method
for recharging the internal battery in the instrument yields the useful feature of
allowing you to recharge the instrument from an automobile (e.g., the cigarette
lighter), thus you may take the instrument into remote locations (or locations
where the local AC supply is unknown) without the concern of recharging the
internal battery.
Continuous Power from External Supply
The charging module or an external DC supply may be left continuously applied
without damage to the 2000 instrument. It is recommended that for the 2000I and
2000M products the unit is allowed to discharge completely to reduce the
memo-ry effect of the Lead Acid battery. Vitrek recommends using an external
DC supply for process control applications.
Warning: Unless the charging source is an external battery, continuous opera-
tion from an external supply when the instrument is connected to a process control system may degrade the safety of that system.
Operating the 2000 Instrument 23
Operating the 2000 Instrument
This chapter discusses operating the 2000I, 2000M, 2000IN and 2000MN DC
power source instruments. Throughout this chapter, the instrument is assumed to
be a 2000M or 2000MN, which has full capabilities, described in this User Guide.
If data is entered for which the option is not fitted, then a message displays for
two seconds, and the entry is discarded.
Front Panel Operation
The 2000 instrument’s front panel provides the user interface for the following
functions: power ON; DC power output; mode selection; data entry, edit and re-
call; measurement; and calibration. Note that recall of steps is covered in the Us-
ing the Memory Options chapter and calibration is covered in Calibration and
Maintenance. Additional 2000 instrument uses are covered in the Applications
chapter.
Initial Power Application
Shortly after the POWER switch is toggled to the ON position, the display will
show the model number and the latest firmware version.
Example: Version: F:03
During the display of this data, the internal microprocessor performs tests upon
the internal circuitry. If any faults are detected, then a message describing the
fault will be displayed. Dependant on the nature of the fault, the instrument will
either display the message for approximately two seconds prior to the instrument
continuing with normal operation or hold the displayed message. In this instance–
no further operation of the instrument is possible until the fault has been corrected.
2000I & 2000M Instrument’s User Guide, Revision B
24
When the POWER switch is placed in the OFF position, the terminals remain in
the condition prevailing. Vitrek recommends selecting the “Stand-by” state
prior to switching the POWER switch OFF, to afford the highest level of
protection both to any circuitry connected to the instrument and to protect the
instrument from inadvertent application of external signals.
Connecting to the OUTPUT Terminals
To deliver voltage, current, or temperature to your test equipment, connect it to
the binding-post terminals using banana plugs, spade leads or wire. When a positive polarity of output is requested, the RED terminal is the positive terminal and
has the requested current flow.
Notes:
1) The terminals are automatically configured as input terminals when the
2000M instrument is set to the “Measure” mode.
2) In cold junction compensation mode (CJC), the output connectors are wired
in parallel with a female rear-panel mounted connector.
Displaying Instrument Status
The DC calibrator instrument offers the flexibility of setting the output level and
setting the instrument’s status to “Standby” or “Operate”. This is done following
the application of power. The display shows the output level and status following
the messages associated with the power on internal tests. With the instrument in
the user-selectable “Standby” mode, the output connectors are disconnected internally.
The following example is seen in “Operate” status, which means the output level
is actually being produced at the output terminals of the instrument. Examples of
the output level and status displays are:
< +10.00000mV >
The following example is seen in “Standby” status, which means the output terminals are open circuited internally.
<+ 10.00000mV Stby >
Operating the 2000 Instrument 25
The displayed output level will be present when the instrument returns to “Operate” status.
Displaying Mode Options
The menu-selectable modes display the opposite selection that is presently active
in the instrument. For instance:
When “Select Operate” displays, the instrument is actually in “Standby”.
When “Select Standby” displays, the instrument is actually in the “Oper-
ate” mode.
When “Start Adjust” displays, the instrument is in the “End Adjust” or
“Operate” mode.
When “End Adjust” displays, the instrument is actually in “Adjust” mode.
When “Lock . . . Rng” displays, the instrument may be in “Unlock . . .
Rng” or the “Operate”or “Standby” mode.
When “Use Active CJC” displays, when the instrument is in “Passive
CJC” or “Operate” mode.
When “Use Passive CJ” displays, the instrument is actually in “Active
CJC”.
Selecting “Operate” or “Standby”
In “Standby” mode the2000 instrument internally open circuits its output terminals. This ensures you and the instrument itself are safe from current and voltage.
When the instrument is in the “Standby” state the characters “Stby” are displayed
at the
right-hand end of the display. When the instrument is in the “Operate” state
then this area is blank in the display format.
To change the mode from “Operate” to “Standby” (or vice versa):
1. Press the MNU key. Depending on the mode, the display will show one of
the following:
< Select Operate > or < Select Standby >
2. Press any of the Units/Enter keys (V, A, ºC or ºF) to display the output (val-
ue) in terms of the displayed mode.
2000I & 2000M Instrument’s User Guide, Revision B
26
3. The display then returns to displaying the selected output level and mode.
The output terminals will either be open circuit–if “Standby” was selected, or
at the requested output level–if “Operate” was selected.
Caution: Prior to selecting the “Operate” mode, check the displayed output lev-
el. If the connected external circuitry is incompatible with the selected output
level, then this circuitry could be damaged when changing to “Operate” mode.
Numeric Data Entry
At various places in the following procedures, the user is requested to provide
numeric data input to the instrument, this paragraph describes the actions required.
Numeric data entry is initiated by pressing a numeric key on the front panel (i.e.,
the digit keys 0 through 9 or the decimal point key). The display then shows the
entered numeric in the left-most character position of the display and the remaining portions of the display will be blank. The cursor will automatically move to
under next possible character entry point, showing the position into which the
next key press will be placed. (Leading zeroes, prior to a decimal point or prior to
a non-zero numeric, are ignored.)
Up to 7 digits plus a decimal point may be entered, entries beyond this are ignored. If no decimal point has been pressed, it is assumed to be following the last
digit pressed (e.g., an entry of
The multiplier keys (m and u) may be used during numeric entries. Thus entries
0.001 and 1m are equivalent. Note that certain entries must use a multiplier,
of
e.g., if an entry of
If an error is made during numeric entry then several options exist for correcting
the data, prior to terminating the entry. The steps are the same for a new entry or
during a prompted entry.
0.00000012 is desired, then this must be entered as 0.12µ.
124 is equivalent to an entry of 124.0).
To correct a data entry error:
1. Press the CLR key. This initializes the entry point either to a blank area or the
previous data.
Operating the 2000 Instrument 27
2. Enter or reenter the entire numeric. If the CLR key is pressed at this time,
then the numeric entry is aborted, the display returns to the previous display.
3. If an incorrect multiplier key is pressed, then simply press the correct multip-
lier to overwrite the previously selected incorrect one. If no multiplier is required, but one is inadvertently selected, then press this multiplier a second
time to clear it.
4. If the decimal point is inadvertently pressed, then press the decimal point
again in the correct position to override the previous entry.
The previous sequence for numeric entry is generally used throughout all entry
sequences. Where specific differences exist refer to the following paragraphs for
an explanation.
Direct Entry of Required Output Level
When the display shows the actual output level and status, the required output
level may be entered. Key in the numeric data followed by the required multiplier
(if desired), and the required units (the units key terminates the entry). The following entries are examples of this procedure.
If the required output is a voltage or current, then the required numeric data is
entered (with a multiplier if desired) followed by the required V or A units key.
To set the output to: 11.2342 V
1. Press the following keys: 1 1 . 2 3 4 2 V
2. The display then shows the requested output level:
+11.23420 V
To set the output to: -10mV
1. Press the following keys: 1 0 +/- m V
2. The display then shows the requested output level:
-10.00000mV
To set the output to: 20.0035mA
1. Press the following keys: 2 0 . 0 0 3 5 m A
2. The display then shows the requested output level:
+20.00350mA
2000I & 2000M Instrument’s User Guide, Revision B
28
Note that the output level is displayed using the same multiplier as used during
the entry of the output level, thus entries of:
1V, 1000mV and 1000000uV.
Each achieve an output level of:
that the selection of polarity should be made during the entry of the numeric data,
pressing the +/– key before pressing any numeric keys causes the present output
level to reverse its polarity.
Caution: For voltage outputs always specify value in millivolts to prevent dam-
age to equipment.
If the entered output level is beyond the capabilities of the instrument, then the
closest possible output level is selected, and a warning message is displayed for
approximately two seconds.
1V, but the display format will differ. Note also
Changing Displayed Multiplier
The output level is displayed using the same multiplier used during the data entry.
Pressing the same multiplier key as is presently displayed will deselect the multiplier.
To reformat the display data use the multiplier keys to select the desired format
for the output level. Pressing the multiplier key that is not presently displayed,
reformats the display. See the examples below.
To deselect the multiplier:
1. For example: if the display is: +10.00000mV
2. Press the
m key to change the display to: +.0100000 V
To use the selected multiplier:
1. For example: if the display is: +10.00uV
2. Press the
m key to reformat the display to: +0.01000mV
Operating the 2000 Instrument 29
And
1. For example: if the display is: +.1000000 V
2. Press the µ key to reformat the display to: +100000. µV
Direct Entry of Temperature Data
The temperature of the hot junction of the thermocouple system to be simulated
may be directly entered similarly to entering output voltage or current. The difference is that the display format is fixed. And although the multiplier may be
used numerically during the entry, the display format is unaffected.
For example: If
lected. The display format used for temperature simulations also includes information regarding the thermocouple type.
Examples of the format used are:
+1000.00°C R and +1000.00°F R
120mºC is entered, then a temperature of 0.12ºC will be se-
In both cases, the selected thermocouple type is “R”. For details on the method
used to select the thermocouple type, cold junction compensation technique and
cold junction temperature, refer to Thermocouple Simulation or Measurement
Set-Up paragraph.
Reversing Polarity of the Present Output Level
As previously mentioned, the polarity of the present output level (or simulated
temperature) may be reversed by simply pressing the +/- key.
1. If the displayed output level is
2. Press the +/- key to change the output level to:
And
1. If the displayed simulated temperature is: +100.00ºC R
: +1.000000 V
-1.000000 V
2000I & 2000M Instrument’s User Guide, Revision B
30
2. Press the +/- key to change the simulated temperature to: -100.00ºC R
Note that unlike voltage or current output levels, the limits of available simulation
temperatures are not identical in both polarities (in general). If the attempted temperature exceeds these limits, then the simulation temperature will be set to the
limit at the requested polarity and a warning message will be displayed for approximately two seconds.
Adjusting Output Level or Simulated Temperature
The 2000 instruments allow you to incrementally step up, or down, the output
level and to incrementally step up, or down, the hot junction simulation temperature. Use this “Adjust” mode to perform calibration of an external unit of equipment. During a calibration procedure the 2000 instrument will display each
modified output level of the equipment being calibrated. This function allows for
any error in the equipment to be highlighted. This section describes the method
used to perform this action.
To access “Adjust” mode:
1. Press the MNU key and then an arrow key: 2, 4, 6, or 8 repetitively until the
adjust choice displays:
2. Press any of the Units/Enter keys (V, A, ºC or ºF
mode. The display then returns to displaying the selected output level, with
the least significant displayed digit flashing (showing the size of the increment that will be used).
During the “Adjust” mode of operation, the following changes to the display format occur:
< Start Adjust >
) to select the “Adjust”
The display no longer shows the “Stby” characters at the right hand end of
the display when in “Standby” mode.
The multiplier is automatically selected to provide the required resolution
in the display. The previously described ability to control the multiplier
used in the display format is inactive.
The thermocouple type data is no longer provided in the display.
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