Time Electronics 5068 Ins-Cal User manual

5068 Ins-Cal
Insulation Tester Calibration
System
TECHNICAL MANUAL
V2.3. 17/10/08

5068 Ins-Cal
Insulation Tester Calibration System
This instrument provides all the equipment necessary to test and
calibrate insulation test sets and megohm meters.
It consists of:
1) 9 high precision selectable spot insulation resistances.
2) 4 low resistance spot values.
3) A continuity test function.
4) A dual range voltmeter.
5) A dual range milliamp meter.
It is constructed from very high insulation materials, including its case
and is fully isolated from any external circuits including the mains
supply.
The switch in the insulation resistance selection circuit is constructed
from special high voltage low leakage wafers and are self cleaning, so
should require no maintenance.
The insulation test section of the instrument, including the leads
provided have been tested for safety up to 2.5 kilovolts.
The maximum safe voltage is limited by any probes or connectors the
end user may fit.
The insulation sections of the instrument may be used separately but
the user must be aware that they have a common earth which will
prohibit two of the sections being used in the same circuit.
The low resistance section is independent.
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Insulation Resistance
Spot value, 100KΩ, 1%, TC 250ppm, Max. Volts 500V
Spot value, 500KΩ, 1%, TC 250ppm, Max. Volts 500V
Spot value, 1MΩ, 1%, TC 250ppm, Max. Volts 1KV
Spot value, 10MΩ, 1%, TC 250ppm, Max. Volts 1KV
Spot value, 100MΩ, 1%, TC 250ppm, Max. Volts 1KV
Spot value, 250MΩ, 1%, TC 250ppm, Max. Volts 1KV
Spot value, 400MΩ, 1%, TC 250ppm, Max. Volts 1KV
Spot value,1GΩ, 1%, TC 250ppm, Max. Volts 1KV
Spot value, 10GΩ, 5%, TC 250ppm, Max. Volts 2.5KV
Break before make self cleaning switches.
Low Resistance
4 spot values, 1R, 10R, 100R and 1K, 1%, 0.5W, TC 50ppm.
Volt Meter
Low Range 0 to 1.999KV, resolution 1V; 1% of full scale reading
High Range 0 to 2.50KV, resolution 10V; 1% of full scale reading
Terminal impedance 1G ohm
Milliamp Meter
Low Range: 0 to 2 mA;1% of full scale reading
High Range: 0 to 20 mA;1% of full scale reading
Terminal impedance 447 ohm ( this includes the discharge resistor for short
circuit test ).
Power: Internal re-chargeable NiCad. Battery
Dimensions: 270W x 246D x 175H mm 2.1Kg
Accessories: High voltage safety connection leads to allow custom 4mm
probes .
9542 low resistance test leads.
5068 Ins-Cal
Specifications
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1) Fully charge the battery in the 5068.
2) Fully charge the battery in the EUT. (or fit fresh batteries).
3) Complete the set up procedure for the EUT.
4) Connect the 5068 leads to the EUT; (make certain
the 4mm plugs on the free end are safe).
5) Adjust the pointer at zero on the insulation tester (if required).
6) Select O/C VOLTAGE setting on 5068 panel.
7) Plug the 4mm connectors into the 5068 observing their polarities.
8) Switch on 5068 and select range of voltage measurement (1/10); (see page 2).
9) Select voltage on the EUT and press the test button.
10) While Pressing the test button of the EUT record the o/c voltage reading on the
5068.
11) Select S/C CURRENT setting on 5068 panel.
12) On the 5068; select the current range (1/10).
13) Press the test button of the EUT and record the current reading on the 5068.
14) Return to o/c Voltage setting (8) and repeat the test; (this is to check the voltage
has recovered).
15) Select one of the 9 spot resistance values on the 5068.
16) Proceed and record test results for each resistance value required.
17) The continuity feature of the EUT can be checked switching to S/C CURRENT or
alternatively use the low resistance section, using the 9542 4mm plug test lead set.
18) The low resistance accuracy of the EUT can be verified by using the low resistance
section of the calibrator.
Insulation Testers will vary from make to make so the controls may be
different, however the principles should still apply. Observe Safety at all
times and if possible, carry out the tests in a low humidity environment.
EUT = Equipment under test.
5068 Ins-Cal
Typical Operation Procedure

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1) Always remove the battery charger leads from both instruments before starting set
up.
2) The high voltage test leads supplied are of a high quality and are rated at 5kV, use
these leads where ever possible for all tests, except for low resistance or continuity
tests, for these use the supplied 9542 4mm plug test lead set.
3) When the measuring leads supplied with the insulation tester are very long or low
insulation quality , it may be necessary to zero (null) the insulation tester display with
them connected. This is will only be required on the low ohm ranges, refer to the
tester manual for instructions.
4) It is not recommended to operate the resistance dial switch when the test button is
depressed. This will not automatically do any damage but may cause unnecessary
movement of the insulation tester display due to the fact that the switch has an open
circuit position between each resistor selection.
5) Avoid opening the 5068 case lid in the rain or in steamy conditions for the moisture
will spoil the calibrations.
5068 Ins-Cal
Observations

Guarantee Period
The 5068 is guaranteed against defects in materials and workmanship for a period of
one year from its delivery to the customer.
We maintain comprehensive after sales Facilities and the unit can, if necessary be re-
turned to us for servicing.
During this period, we will at our discretion repair or replace the defective item.
For servicing under guarantee, the instrument type and serial number must always be
quoted, together with details of any fault and the service required. The purchaser of
the instrument must pay all shipping charges to manufacturer. We will pay return
shipping charges.
This guarantee is void if servicing has been attempted by an unauthorised person or
agent.
If during the guarantee period, failure is due to misuse or abuse of the unit, the repair
will be put in hand without delay and charged unless other instructions are received.
Please note that if you require a new UKAS Certificate during the warranty period, this
will be charged at the current rate on our price list.
Service After Guarantee Period
Even after the guarantee period has expired, we can still recalibrate and service your
instrument.
As the manufacturer, we have the specialised knowledge needed to keep your instru-
ment in peak condition and we also maintain a comprehensive spare parts service.
Please enclose details of the service required and your full company details including
a contact name.
Returning Instruments
When returning instruments, please ensure that they have been adequately packed,
preferably in the original packing supplied. We will not accept responsibility for
units returned damaged.
Please ensure that all units have details of the service required and all relevant paper-
work including contact name, address and telephone number.
Time Electronics Ltd
Unit 11 Botany Industrial Estate
Tonbridge, Kent, TN9 1RH
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