Time Electronics 1017 Owner's manual

V1.1 20/04/09 Time Electronics Ltd
Botany Industrial Estate, Tonbridge, Kent, TN9 1RH
Tel: [phone] Fax: [phone]
Email: [e-mail]
Web Site: www.TimeElectronics.com
Time Electronics
1017 DC Multifunction VIR Calibrator
Technical Manual

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1017 Technical Manual 2
Contents
1. Introduc tion ........................................................................................................ 3
1.1. General Description............................................................................................3
1.2. Specifications.....................................................................................................4
1.3. Circuit Description..............................................................................................5
1.4. Power Supply Description .................................................................................5
2. Front Panel Controls .......................................................................................... 6
3. Operation ............................................................................................................ 7
3.1. Preparing for Use................................................................................................7
3.2. Using the 1017 ....................................................................................................7
3.3. Thermal EMF's....................................................................................................7
3.4. Using the Deviation Control...............................................................................7
4. Calibration .......................................................................................................... 8
4.1. Calibrating the 1017............................................................................................8
4.2. Zero Adjustment.................................................................................................8
4.3. Calibrating the Full Scales.................................................................................9
4.4. Calibrating the Deviation Control......................................................................9
5. Guarantee & S ervicing..................................................................................... 10
All Time Electronics' instruments are subject to continuous development and improvement and in
consequence may incorporate minor detail changes from the information contained herein.

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1017 Technical Manual 3
1. Introduction
1.1. General Description
The 1017 is a high performance portable calibrator for use in the field or laboratory.
With voltage ranges from 10nV to 100V, current from 100nA to 100mA and resistance from
10mΩ to 10kΩ, it makes the 1017 an extremely versatile instrument, capable of calibration
or simulation.
The digital deviation control allows the output to either increase or decrease directly in a
percentage from 0.001% to 0.999%. This is a useful feature for checking the accuracy of
difficult scales.
Long term stability is guaranteed by the use of high quality components and the latest in
resistor technology.
The 1017’s basic reference source is a specially aged, computer selected, precision
reference diode. The diode provides the input to the instruments active circuitry which
incorporates several high performance chopper stabilised amplifiers with a zero stability of
less than 0.5uV per°C and a warm up time of less than 1 minute.
The precision resistors used in the 1017 are high performance types with temperature ratio
matching of less than 2ppm per °C.
The output terminals are low thermal E.M.F. types, typical E.M.F. of less than 0.2uV per °C.
The 1017 can be powered from either the mains or the internal rechargeable battery pack.
The batteries are automatically recharged when the mains supply is connected. A front
panel battery level indicator displays the batteries state of charge.
Output polarity can be reversed via a switch on the front panel.

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1017 Technical Manual 4
1.2. Specifications
Outputs: 0 – 100V in 5 Ranges
0 – 100mA in 1 Range
0 – 10kΩin 1 Range
Voltage
Range: 0 – 9.99999mV in 10nV steps
0 – 99.9999mV in 100nV steps
0 – 999.999mV in 1uV steps
0 – 9.99999V in 10uV steps
0 – 99.9999V in 100uV steps
Accuracy: 10mV range 0.02% of setting +/- 0.005% of range
100mV range 0.01% of setting +/- 0.004% of range
1V range 0.005% of setting +/- 0.002% of range
10V range 0.005% of setting +/- 0.002% of range
100V range 0.01% of setting +/- 0.004% of range
Output Resistance: 100mV to 10V <200mΩ
10mV and 100V <1Ω
Output Current: 100mV to 10V 150mA
100V 10mA
10mV Limited by 1ΩOutput resistance
All specification +/- 3uV.
Current
Range: 0-99.9999mA in 100nA steps
Accuracy: 100mA range 0.02% of setting and 0.004% of range
Drive Voltage: 10V Maximum
Resistance
Range: 0 – 9.99999kΩin 10mΩsteps
Accuracy: 0.05% of full scale
Power Rating: 250mW per Resistor
End Resistance: < 200mΩ
Deviation Control (Only on Voltage and Current)
Range: 0.001% to 0.999% in 0.001% steps
Accuracy: 0.5% Accuracy
Stability
Less than 10ppm/°C on all ranges.
Less than 5ppm/Day at constant temperature
Less than 15ppm/90 days
Less than 25ppm/Year
Output Noise
Output Noise (0.1Hz to 10Hz) - Typically 3ppm.
Power Supply
The 1017 can be used continuously from a 220V / 240V 50 / 60Hz (110V / 120V to order)
mains supply or from the internal rechargeable Ni-Cad battery pack. A front panel meter
indicates the state of charge at all times.

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1017 Technical Manual 5
Dimensions & Weight
Dimensions – 290mm x 250mm x 110mm
Weight – 2.4Kg
1.3. Circuit Description
Operating Temperature
0°C to +50°C max. For optimum performance and stability the 1017 should be stored and
used in temperatures between 15°C and 25°C.
The calibrator employs a temperature compensated zener diode as the basic reference
source. This provides the input to an FET chopper amplifier system which operates in a feed
– back stabilised mode, and has a gain value determined by a set of precision wire-wound
resistors which are selected by a 6 decade thumbwheel switch. The output voltage is
variable from 0V to 99.9999V in 6 ranges.
An output resistance of typically 150mΩis maintained on all ranges excluding the 100V
range where the output resistance is 1Ω. The maximum output current that can be drawn on
the 10V and 1V ranges is automatically limited to approximately 150mA, or 15mA on the
100mV range. It must be noted that the current on the 10mV range is limited by a 1Ω
resistance. The output current on the 100V range is 10mA.
The 100V output is generated by driving a step-up transformer with the ’chopped’ D.C.
output from the output of the module. Feedback around the complete amplifier regulates the
output to the set output value.
When the 100mA range is selected, the output current is sensed by a precision resistor.
The voltage generated across this resistor is used to control the output drive voltage, so
regulating the output current.
The resistance range operates by directly switching the thumbwheel switch to the output
terminals.
The deviation control operates by injecting a current into the reference circuitry which either
increases or decreases the reference voltage.
To ensure complete reliability of the thumbwheel switch, double pole gold plated contacts
are used for each position – even if a contact fails, the 1017 will continue to work correctly.
1.4. Power Supply Description
The power supply for this unit is via a Time Electronics PU2 power supply. This unit
provides a battery power supply for portable use, which is automatically charged when
mains operation is used. This is mounted on the rear panel of the 1017. The power supply
is set for 220V – 240V AC mains unless otherwise specified.
When the mains is connected, the charging circuitry provides the correct charge current (40
– 45mA) for the battery and automatically reduces this to at trickle charge (3 – 4mA) when
the battery is fully charged. This means that it is impossible to over-charge the battery.
Approximately 30 – 40 hours use may be obtained between charges, depending on the
output setting.