Time Electronics 5051 Plus User manual

User Manual
Multifunction Calibrators
5051 Plus
7051 Plus
Version 2.1
April 2021
Time Electronics Ltd
Unit 5, TON Business Park, 2-8 Morley Road,
Tonbridge, Kent, TN9 1RA, United Kingdom.
T: [phone] | F: [phone]
[e-mail] | www.timeelectronics.com

Time Electronics User Manual
5051 Plus and 7051 Plus Multifunction Calibrators v2.1
xx51+ Multifunction CalibratorsPage 2 of 64
© 2021 Time Electronics Ltd.
All rights reserved.
Nothing from this manual may be multiplied, or made public in any form or manner, either
electronically or hard copy, without prior written consent from Time Electronics Ltd.
This also applies to any schematics, drawings and diagrams contained herein.
This manual provides operating and safety instructions for the Time Electronics product.
To ensure correct operation and safety, please follow the instructions in this manual.
Time Electronics reserves the right to change the contents, specifications and other information
contained in this manual without notice.

Time Electronics User Manual
5051 Plus and 7051 Plus Multifunction Calibrators v2.1
xx51+ Multifunction CalibratorsPage 3 of 64
Contents
1. Introduction ................................................................................................................... 5
1.1. Features...................................................................................................................................................5
1.2. Calibration Capabilities..........................................................................................................................5
2. Specifications................................................................................................................ 6
2.1. Calibrator (Source) .................................................................................................................................6
2.2. 6.5 Digit Multimeter (measure) ..............................................................................................................6
2.3. 7051 Control Centre Details...................................................................................................................7
2.4. 7051 General Specifications ..................................................................................................................7
2.5. 5051 Control Centre Details...................................................................................................................8
2.6. 5051 General Specifications ..................................................................................................................8
3. General Safety Precautions ......................................................................................... 9
4. General Operation Precautions ................................................................................... 9
5. 7051 Plus...................................................................................................................... 10
5.1. Standard 7051Plus ...............................................................................................................................10
5.2. 7051Plus With CCPAD Option.............................................................................................................10
5.3. 7051 Terminal Panel .............................................................................................................................11
6. 5051 Plus...................................................................................................................... 12
6.1. 5051 Plus Important Information.........................................................................................................12
6.2. 5051 Terminal Panel .............................................................................................................................13
7. Operation ..................................................................................................................... 14
7.1. Operating the xx51 as a calibrator ......................................................................................................15
7.2. DC Voltage ............................................................................................................................................16
7.2.1. Setting the Output Value ..........................................................................................................17
7.2.2. DC Voltage Connection Diagram .............................................................................................18
7.2.3. HV interlock and ramping .........................................................................................................19
7.2.4. Varying the Output Level..........................................................................................................20
7.2.5. Using Deviation ........................................................................................................................20
7.2.6. Monitoring the Internal Temperature ........................................................................................22
7.3. DC Current ............................................................................................................................................23
7.3.1. Current Output Terminals.........................................................................................................23
7.3.2. DC Current Connection Diagrams............................................................................................24
7.3.3. Output Error..............................................................................................................................25
7.3.4. High Current Interlock and Ramping ........................................................................................25
7.4. AC Voltage ............................................................................................................................................26
7.4.1. Frequency Limits ......................................................................................................................26
7.4.2. HV Interlock and Ramping .......................................................................................................26
7.4.3. Low Output Range – 20mV ......................................................................................................26
7.4.4. AC Voltage Connection Diagrams............................................................................................27

Time Electronics User Manual
5051 Plus and 7051 Plus Multifunction Calibrators v2.1
xx51+ Multifunction CalibratorsPage 4 of 64
7.5. AC Current ............................................................................................................................................28
7.5.1. AC Frequency Limits................................................................................................................28
7.5.2. AC Current Connection Diagrams............................................................................................29
7.6. R-G-C-L Function Selection.................................................................................................................30
7.6.2. R-G-C-L Connection Diagram ..................................................................................................31
7.6.3. Decade Resistance ..................................................................................................................32
7.6.4. Full Range Resistance .............................................................................................................33
7.6.5. Conductance ............................................................................................................................34
7.6.6. Capacitance .............................................................................................................................35
7.6.7. Inductance................................................................................................................................36
7.8. Temperature Simulation Selection......................................................................................................37
7.8.1. PRT Simulation ........................................................................................................................38
7.8.2. Thermocouple Simulation.........................................................................................................39
7.9. Oscilloscope Calibration......................................................................................................................41
7.9.1. Amplitude .................................................................................................................................42
7.9.2. Amplitude (50 ohm) ..................................................................................................................43
7.9.3. Time Markers / Period ..............................................................................................................44
7.9.4. Frequency ................................................................................................................................45
7.9.5. Duty Cycle................................................................................................................................46
7.9.6. Bandwidth (via fast rise) ...........................................................................................................47
7.9.7. GHz Sweep ..............................................................................................................................49
7.10. System Information................................................................................................................50
7.11. Operating the xx51 as a Multimeter......................................................................................51
7.11.1. Selecting Measurement Function.............................................................................................51
7.11.2. Selecting Range .......................................................................................................................52
7.11.3. Selecting Display Resolution....................................................................................................52
7.11.4. Reading Hold............................................................................................................................53
7.11.5. Nulling a Reading .....................................................................................................................53
7.11.6. Thermocouples and CJC..........................................................................................................53
7.11.7. Exiting xx51 Multimeter Mode ..................................................................................................53
8. EasyCal Software ........................................................................................................ 54
9. 7051 Pressure Control Centre.................................................................................... 55
9.1. Controls.................................................................................................................................................56
10. Included Accessories ................................................................................................. 57
10.1. Using the 9780 Clamp Meter Adaptor...................................................................................59
10.2. 7112 Transducer Patch Box (7051 Only) ..............................................................................60
10.3. 7051 CCPAD Option ...............................................................................................................61
11. Re-Calibration.............................................................................................................. 62
12. Fault Diagnosis ........................................................................................................... 62
12.1. Fault Check List......................................................................................................................62
13. Warranty and Servicing .............................................................................................. 63
NOTE: The 7051 Plus / 5051 Plus are a packages that includes specific options for a wide workload coverage.
This manual will refer to the 7051 or 5051 in certain sections as an abbreviation.
Where instructions apply to both the 5051 and 7051, the term xx51 will be used.

Time Electronics User Manual
5051 Plus and 7051 Plus Multifunction Calibrators v2.1
xx51+ Multifunction CalibratorsPage 5 of 64
1. Introduction
The xx51Plus combines a high accuracy calibration source with a precision digital multimeter.
It incorporates a wide range of internally fitted functions to provide users with a multi product
calibration solution. It is suitable for rapid calibration with automated test runs using EasyCal
software, covering electrical test tools, process instrumentation, oscilloscopes and more. Adaptors
and accessories are included for specific applications such as clamp meter and optical tachometer
calibration. Supplied test leads enable the necessary connections for nearly all applications.
Calibrator: Provides a wide range of calibrated outputs for AC/DC voltage and current, resistance,
capacitance, inductance, RTD and thermocouple simulation.
Multimeter: The integral 6½ digit multimeter measures DC voltage to 1000V, AC voltage to 750V,
resistance to 100MΩ, and frequency to 300kHz.
Control Centre: A intuitive user interface with large 12.1” touch screen display (10.4” on 5051+).
The control centre is a PC with a 64 bit dual core processor, running Windows 10. As standard it
features the calibrator and multimeter control applications, with the wide range of functions easily
selectable using mouse, keyboard or touch screen.
EasyCal: Enables automatic calibration to increase speed and efficiency of work. In addition,
EasyCal has features to manage and administrate both inventory and quality control. To complement
the system a printer and connectivity kit is supplied as standard, for generation of certificates and
reports. Further supplied accessories include a bar code reader for quick identification of devices in
EasyCal, and label printer for creating stickers and labels to be placed on instruments.
Communication: Using EasyCal the operator can read back from compatible electrical, temperature,
pressure, and loop modules within the bench. EasyCal can also be used with external instruments
such as dry block calibrators and portable test instruments available.
1.1. Features
oIntegral multifunction calibrator and 6.5 digit multimeter
oTouch screen PC control centre with 10.4” or 12.1” display
oSource up to 1050V AC/DC voltage
oSource up to 22A AC/DC current
oSource resistance (up to 1 GΩ), capacitance and inductance
oOscilloscope calibration and optional power calibration
oMeasure voltage, current, resistance, frequency
oThermocouple and PT100 simulation and measurement
oEasyCal software, adaptors and accessories included
oCommunicate with EasyCal compatible modules
1.2. Calibration Capabilities
oMultimeters, clamp meters, ohmmeters, AC/DC signal sources
oDecade boxes, data loggers, RCL meters
oTachometers, oscilloscopes, frequency counters, timer counters
oFrequency meters, watt meters, power meters, current probes
oThermocouples, RTDs, Thermometers, PRTs, thermistors
oTemperature indicators, recorders, controllers, switches
oLoop and process calibrators

Time Electronics User Manual
5051 Plus and 7051 Plus Multifunction Calibrators v2.1
xx51+ Multifunction CalibratorsPage 6 of 64
2. Specifications
2.1. Calibrator (Source)
Function Range / Values Best 1 Year Specification
Voltage DC 0 to ± 1050V ± 15ppm of setting
Current DC 0 to ± 22A ± 80ppm of setting
Voltage AC 1mV to 1050V (10Hz to 1MHz, sine-wave) ± 300ppm of setting
Current AC
10μA to 22A (20Hz to 1kHz, sine-wave)
± 0.05%
Clamp Meter Adaptor x50 turn AC/DC Current up to 1100A (DC, 45 to 90Hz) ± 0.5%
Capacitance 1nF, 10nF, 100nF, 1μF, 10μF, 100μF (100V Max) ± 0.25%
Inductance 1mH, 1.9mH, 5mH, 10mH, 19mH, 50mH, 100mH, 190mH, 500mH, 1H,
10H
± 0.1%
Decade Resistance 1Ω to 1GΩ (decade values) ± 20ppm of setting
Full Range Resistance 1Ω to 120MΩ (variable) ± 100ppm of setting
Conductance 1s to 1ns (fixed values, decade steps) ± 20ppm of setting
Thermocouple Simulation -270 to 1820°C (type J, K, R, T, S, B, E, N) ± 0.15°C
PT100 Simulation -180 to 850°C ± 0.07°C
Oscilloscope Calibration
Amplitude 6mV to 200V and 6mV to 2V 50Ω (Square-wave or DC) ± 0.05%
Frequency/Period 0.1Hz to 100MHz / 10ns to 10s (fixed values 1, 2, 5 sequence)
± 0.1ppm (0.1Hz to 10MHz / 100ns to10s)
± 20ppm (20, 50, 100MHz / 50, 20, & 10ns)
Duty Cycle
3 frequencies: 100Hz, 1kHz, 10kHz, settable from 0 to 100%
–
Fast-Rise < 400ps. Bandwidth checking up to 400MHz –
Option 9769: Scope 2.2GHz
Sweep 100MHz to 2.2GHz levelled sine-wave (0.5, 1, 1.5V pk-pk) Amplitude ± 1%
Frequency ± 20ppm
2.2. 6.5 Digit Multimeter (measure)
Function Range / Values Best 1 Year Specification
Voltage DC 0 to 1000V 35ppm of rdg + 6ppm of rng
Current DC 0 to 3A 500ppm of rdg + 50ppm of rng
Voltage AC 0 to 750V 0.06% of rdg + 0.04% of rng
Current AC 0 to 3A 0.1% of rdg + 0.04% of rng
Resistance 0 to 100MΩ 100ppm of rdg + 50ppm of rng
Frequency 3Hz to 300kHz 0.01% of rdg
Thermocouple -270 to 1800°C (Type J, K, R, T, S, B, E, N) ± 0.5°C
PT100 -180 to 850°C ± 0.08°C
Note: See extended specifications data sheet for full technical data.

Time Electronics User Manual
5051 Plus and 7051 Plus Multifunction Calibrators v2.1
xx51+ Multifunction CalibratorsPage 7 of 64
2.3. 7051 Control Centre Details
Feature Specifications
Processor 64 bit, dual core (or equivalent)
RAM 16GB
Hard Drive 120GB Solid State (or higher)
Ports Front: 4 x USB / Rear: 2 x USB, 2 x RS-232
Display 12.1” Touch Screen LCD
Operating System Windows 10
Pre loaded Software Programs 7051 Manual Control Applications (Calibrator and Multimeter), EasyCal Software
Keypad Module Option CCPAD: Control Centre numeric keypad module with jog dial
For input/control of manual calibration applications & EasyCal software on the control centre.
Supplied Hardware/Accessories USB keyboard and mouse, Inkjet Printer, Cal and ID Label Printer, 4 port USB hub, Numeric key pad, USB
memory stick, bar code reader, label printer
Control Centre Operated Module Options Pressure: XTEG Gauge/Differential/Compound modules (EasyCal software compatible)
Frequency: CCScope Oscilloscope Modules / CC-FRQC Frequency Counter Module
Modules with EasyCal Communication
8030B Pressure Controllers / MTEG/RMTEG Pressure Calibrators / 5065B and 5075BDMMs
7085A Temperature Distribution Module / 7002/7003/7004 Process Communicators /
8029 Electronic Load / 5030B Electrical Tester Calibrator
External Products with EasyCal Communication TEG Digital Pressure Gauges / Dry Block Calibrators
EasyCal Software Add-ons and Options 9779: Job and Address Label Printer / EC2FL/EC2WL: Additional User Licenses for separate PCs
EAD: EasyAdmin Add-On / CREP: Crystal Reports Software
2.4. 7051 General Specifications
Environmental Specifications/Details
Warm up 30 minutes to full accuracy
Settling Time Less than 5 seconds
Temperature Performance Operating: 5 to 45°C. Full Spec: 22°C +/- 3°C. Storage: -10°C to 50°C
Operating Humidity/Altitude <80% non condensing. Altitude: 0 to 3km. Non operating: 3km to 12km
Line Power 100 to 230V AC 50/60 Hz. 200W maximum
Dimensions W425mm (507mm with CCPAD option), H201mm (primary console fitting only)

Time Electronics User Manual
5051 Plus and 7051 Plus Multifunction Calibrators v2.1
xx51+ Multifunction CalibratorsPage 8 of 64
2.5. 5051 Control Centre Details
Feature Specifications
Processor 64 bit, dual core (or equivalent)
RAM 4GB (or higher)
Hard Drive 120GB Solid State (or higher)
Ports 4 x USB, 1 x Fast Ethernet
Display 10.4” Touch Screen LCD
Operating System Windows 10
Pre loaded Software Programs 5051 Manual Control Applications (Calibrator and Multimeter), EasyCal Software
Supplied Hardware/Accessories USB keyboard and mouse, Inkjet Printer, Cal and ID Label Printer, 4 port USB hub, Numeric key pad,
USB memory stick, bar code reader, label printer
2.6. 5051 General Specifications
Environmental Specifications/Details
Warm up 30 minutes to full accuracy
Settling Time Less than 5 seconds
Temperature Performance Operating: 5 to 45°C. Full Spec: 22°C +/- 3°C. Storage: -10°C to 50°C
Operating Humidity/Altitude <80% non condensing. Altitude: 0 to 3km. Non operating: 3km to 12km
Line Power 220 to 230V AC 50 Hz or 110 to 120 V 60 Hz. 200W maximum
Dimensions / Weight W430mm, H202mm, D538mm. Weight: 23kg

Time Electronics User Manual
5051 Plus and 7051 Plus Multifunction Calibrators v2.1
xx51+ Multifunction CalibratorsPage 9 of 64
3. General Safety Precautions
High Voltage: The xx51 can produce 1050 V and users should be aware of the dangers
involving serious electrical shock.
High Current: The xx51 can produce 22 Amps and users should be aware of the power
levels involved. Equipment connected to the 5051 should be capable of withstanding the
currents involved without damage. High current outputs, greater than 10A, should not be
left on for periods longer than 10 minutes.
4. General Operation Precautions
Prior to using the xx51, the following precautions and recommendations should be noted.
oThe xx51’s outputs are protected against short circuit, but serious internal damage can occur if
voltage or current is injected into output terminals.
oThe xx51’s output terminals are floating with respect to mains earth (the green terminal on the
front panel). The negative output terminals can be allowed to rise to a maximum of +/-75V with
respect to earth. For certain calibrations it will be found beneficial to earth the low (negative)
output terminal. This will prevent noise pickup and will generally improve the stability of readings
if the unit under calibration is not earthed.
oEarthing the xx51’s high (positive) terminals is prohibited.
oThe user should always be aware of the dangers of high voltage. The xx51 can produce 1000V
AC, which is approximately 1600V peak. Voltages of this level present a serious electrical shock
hazard to the user. Care should be taken to ensure that voltages above 50V are switched off
before the user touches the test leads.
oCertain types of equipment will be found to be susceptible to electrical noise pickup at the
frequency of the main power supply. Generally, this sort of equipment should be calibrated at a
different frequency.
oThe precision resistors used for the passive resistance function are suitable for operation at low
currents. Care should be taken not to overload them, since permanent damage can result. The
max allowed currents are, 10mA up to 1kΩ, 1mA for 1k– 10kΩ, 0.1mA for 10k– 100kΩ, and
10uA above 100kΩ.
oWhen using the high current (20A) terminals, ensure that good quality low contact resistance
connectors and leads with adequate current carrying capability are used. The 9542 General
Purpose Test Leads are rated to 32 A and designed for this application.
oTo clean use an alcohol-free wipe such as a ‘durable screenclean 50’

Time Electronics User Manual
5051 Plus and 7051 Plus Multifunction Calibrators v2.1
xx51+ Multifunction CalibratorsPage 10 of 64
5. 7051 Plus
5.1. Standard 7051Plus
5.2. 7051Plus With CCPAD Option
The CCPAD is a module designed to accompany the CalBench control centre, for use with the
manual control programs and EasyCal calibration software.

Time Electronics User Manual
5051 Plus and 7051 Plus Multifunction Calibrators v2.1
xx51+ Multifunction CalibratorsPage 11 of 64
5.3. 7051 Terminal Panel
The terminal panel locates to the right side of the control centre module and features a Measure and
Source section.
Multimeter Section
•DCV to 1 kV
•ACV to 750 V
•DCI / ACI to 3 A
•Resistance: 0 to 100 MΩ
•Frequency: 3 Hz to 300 kHz
•Thermocouple Measure
•Pt100 Measure
Main Output
•DCV / ACV to 1 kV
•DCI / ACI to 200 mA
•4-W Resistance Sense (optional)
RCL Output
•Resistance: 1 Ω to 120 MΩ
•Decade Resistance to 1 GΩ
•Capacitance 1 nF to 100 µF
•Inductance: 1 mH to 10 H
H
igh Current Output
•DCI / ACI 200 mA to 20 A
FRQ/Scope Output
•Amplitude to 200 V / Frequency
to 100 MHz
Aux Output
•ACV 20 kHz to 1 MHz (2 V max)
•ACV 20 kHz to 100 kHz (20 V max)
LED Function
Indications
2.2GHz Option PE
Socket

Time Electronics User Manual
5051 Plus and 7051 Plus Multifunction Calibrators v2.1
xx51+ Multifunction CalibratorsPage 12 of 64
6. 5051 Plus
6.1. 5051 Plus Important Information
Warning: The 5051 is a heavy instrument and care should be taken when lifting to
prevent injury. Use both handles to carry.
Warning: If this equipment is used in a manner not specified by the manufacturer, the
protection provided by the equipment may be impaired. This instrument must be
connected to a grounded outlet.
This instrument is to be serviced by trained personnel only.
Disconnect mains supply before removing cover or replacing fuses.
For operations involving removal of the 5051’s cover, users should be aware that certain
sections of the circuitry carry high voltages, which are hazardous. Very high currents
causing burns can also be generated if certain terminals are inadvertently shorted.
Locating the Instrument.
For bench-top use, make sure the instrument is located on a flat, firm surface. The instrument is fitted
with four plastic feet. The two front feet can be adjusted to ‘tilt’ the instrument.
A 10 cm area of free space is recommended at the rear of the instrument. Do not obstruct the fan
inlet on the rear of the unit. Do not obstruct any exhaust outlets on the bottom of the instrument.
Please retain the shipping case for future use e.g. transport of 5051 for calibration.
Powering the Instrument.
Before connecting power to the 5051 for the first time, please ensure that it has been set to accept the
correct voltage. 100/120V 60Hz operation is an option and specified on ordering.
The supply power is connected via a standard IEC Euro connector on the rear panel. The standard
voltage supply is 220/230V 50Hz. There two protection fuses mounted on the rear panel next to the
IEC connector, both are 3.15A slow blow.

Time Electronics User Manual
5051 Plus and 7051 Plus Multifunction Calibrators v2.1
xx51+ Multifunction CalibratorsPage 13 of 64
6.2. 5051 Terminal Panel
Main Output
•
DCV / ACV to 1 kV
•
DCI / ACI to 200 mA
•
4-W Resistance Sense (optional)
Multimeter Section
•
DCV to 1 kV
•
ACV to 750 V
•
DCI / ACI to 3 A
•
Resistance: 0 to 100 MΩ
•
Frequency: 3 Hz to 300 kHz
•
Thermocouple Measure
•Pt100 Measure
RCL Output
•
Capacitance 1 nF to 100 µF
•
Inductance: 1 mH to 10 H
•
Decade Resistance to 1 GΩ
•
Full Resistance: 1 Ω to 120 MΩ
H
igh Current Output
•
DCI / ACI 200 mA to 20 A
GHz Sweep (Option)
•100 MHz to 2 GHz Sine wave
Protective Earth (PE)
FRQ/Scope Output
•
Amplitude to 200 V /
Frequency to 100 MHz
Aux Output
•
ACV 20 kHz to 1 MHz (2 V max)
•
ACV 20 kHz to 100 kHz (20 V max)
LED Terminal Indicators

Time Electronics User Manual
5051 Plus and 7051 Plus Multifunction Calibrators v2.1
xx51+ Multifunction CalibratorsPage 14 of 64
7. Operation
After completing the power-up initialisation the Control Centre will show the conventional Windows
desktop on the screen. The start menu is set up for the following applications:
EasyCal
•EasyEdit
•CalRun
•PrintCert
•EasySupport
Control Apps
•Calibrator Control (Source)
•DMM Control (Measure)

Time Electronics User Manual
5051 Plus and 7051 Plus Multifunction Calibrators v2.1
xx51+ Multifunction CalibratorsPage 15 of 64
7.1. Operating the xx51 as a calibrator
To use the xx51 as a high accuracy calibration source, click or touch the xx51 calibrator icon from the
start menu. The program will initialise the xx51 before entering the FUNCTION selection screen
which shows the main functions of the xx51:
The Options button provides access to various system set up parameters and general information
about the xx51.
The Exit Application button terminates the program and returns to Windows desktop

Time Electronics User Manual
5051 Plus and 7051 Plus Multifunction Calibrators v2.1
xx51+ Multifunction CalibratorsPage 16 of 64
7.2. DC Voltage
At the top of the screen is a sub window, which displays in large characters the output value and
units. In small characters below are shown the range and function selected.
DC V

Time Electronics User Manual
5051 Plus and 7051 Plus Multifunction Calibrators v2.1
xx51+ Multifunction CalibratorsPage 17 of 64
7.2.1. Setting the Output Value
Please note, at all times, pressing the Zero Output button will set the output terminals to 0V.
A conventional numeric keypad is used for setting the output. Enter the value required using the digit
buttons. Alter the polarity of the value using the +/-button. During entry, use the Cbutton to delete
the last digit entered, or hold down the Cbutton for a second to delete all the entered digits.
Finally press one of the unit buttons, i.e. µV, mV or V. The selected output value will now be present
on the output terminals.
Note, the unit will automatically select the appropriate range according to the output value entered.
The changeover point is 10% above the nominal full scale for DC ranges, and 1% for AC ranges, e.g.
the 2V DC range extends to 2.2V, any selection above 2.2V and less than 22V will automatically
switch to the 20V range.
The maximum output selectable in DCV mode is +/-1050V. If you enter a value greater than this, the
following message will appear for a few seconds and the output will not be set:
DC V

Time Electronics User Manual
5051 Plus and 7051 Plus Multifunction Calibrators v2.1
xx51+ Multifunction CalibratorsPage 18 of 64
7.2.2. DC Voltage Connection Diagram
DC V

Time Electronics User Manual
5051 Plus and 7051 Plus Multifunction Calibrators v2.1
xx51+ Multifunction CalibratorsPage 19 of 64
7.2.3. HV interlock and ramping
A safety interlock feature is incorporated to ensure that user must undertake an additional operation
when voltages about 40V are selected.
To prevent potential damage to equipment being calibrated, large changes in the voltage setting
cause the xx51 to change the output by a controlled ramp (instantaneous change is not permitted).
Press OK to confirm the output or Cancel to return to the previous output setting.
In addition, if the voltage selected is 100V (or more) greater than the present output level, ramping of
the voltage will occur at approximately 200V per second. During this process, the following window
will be displayed:
Note, if necessary you may use the Stop Output button during ramp up to immediately set the output
voltage to zero.
Ramping down of the voltage will occur if the requested new output level is 100V (or more) lower than
the present output. This window will be displayed during ramp down:
DC V

Time Electronics User Manual
5051 Plus and 7051 Plus Multifunction Calibrators v2.1
xx51+ Multifunction CalibratorsPage 20 of 64
7.2.4. Varying the Output Level
Once an output level has been set, it may be varied in the following ways:
•Its polarity can be toggled using the +/-button
•Its value can be multiplied by 10 or divided by 10 using the x10 and /10 buttons (if required,
the range will change automatically)
•Pressing the Zero Output button will set the output to zero volts
•Entering a new output level using the numeric keypad. The output will remain unchanged
until a unit button is pressed
•Using deviation to vary the output level by up to +/-10%, described below
7.2.5. Using Deviation
The top right sub window shows the amount of deviation that has been applied to the output. If no
deviation has been applied, zero deviation is indicated in this window by 3 dashed lines.
Note, you can only set a deviation if the output level is non-zero.
DC V