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EM Test
esd NX30
Instruction Manual
V 1.00.7
29 / 33
9
MAINTENANCE
Cleaning
The housing can be cleaned with a moist cloth with possibly just a trace of detergent liquid. Industrial spirit is also a suitable
cleaning agent. Other solvents are not permitted.
Fuses
The instrument contains no fuses that are accessible to the user.
9.1
Calibration
Trimming procedures in the esd NX30 are carried out digitally and automatically. The instrument contains no elements that are
foreseen for adjustment by the user. A component defect must be suspected if the calibration measurements differ from the
published technical data and the instrument is to be returned to an authorized EM Test/AMETEK service centre.
Measurements can only be undertaken by trained specialists. A prerequisite is the availability of the necessary measurement
equipment as listed in section "Verification of pulse data". Charge voltage check:
Equipment: EHT voltmeter with 40 kV voltage range
Internal resistance > 20 GΩ
Measurement accuracy < 1% Check the voltage level under the following conditions:
Air-discharge
Single-discharge
Polarity: positive and negative
Voltage settings: 2, 4, 8, 15 and 30 kV
Permissible tolerance < ± 5% of set value
Check the discharge current and pulse form as follows: Contact-discharge
Single-discharge
Polarity: positive and negative
Voltage settings: 2, 4, 8, 15 and 30 kV
Compare the measured values with the reference data in IEC / EN 61000-4-2.
These values are valid only for the discharge network that conforms to IEC / EN 61000-4-2.
Remark
EM Test offers an accredited service for this kind of work!
9.2
Exchanging the R/C network
WARNING
If a network needs to be exchanged, the test has to be stopped first, followed by a waiting time of at least 5 s
to ensure the voltage being internally discharged.
Switch the simulator off.
Open the flap under the display and rotate the pistol backwards until the network drops out under its own weight. Take care!
Catch the network in the other hand.
9.2.1
Reduction of the pulse repetition rate through higher capacitance
The maximum achievable pulse repetition rate will automatically derate as a result of using special discharge networks having
a higher capacity. No other limiting effects occur, however.
9.3
Repairs
Repair work is to be carried out exclusively by an authorized EM Test repair department.
WARNING
Voltages in excess of 30 kV are generated within the instrument: LETHAL DANGER!