METRON QA-ES, User & Service Manual, Page: 25 / 55

5. Control and Calibration
This chapter explains the QA-ES maintenance procedures, including
testing and calibration.
5.1 Required Test
Equipment

ESU, 200W in 75 ohms with 500 kHz

Signal generator, 3 MHz, harmonics better than -40 dBc with
500 kHz, 0 dBm

Digital multimeter

Digital multimeter, HP 34401 or equivalent

RMS / Peak Voltmeter, RHODE & SCHWARY URE 3 or
equivalent

Oscilloscope, 10 MHz

Electrosurgical probe for QA-ES

Computer (PC) with RS-232C interface

Printer with parallel interface

Short circuit SMB terminal, female

Test cables
5.2 Preparation
Before performing testing and calibration, you must dismantle the
housing. This is accomplished by removing the side plates fastened
with Velcro

straps. Then, remove the bottom plate by loosening the
four screws. Afterwards, move the bottom plate of the isolation box
by loosening the 16 screws holding it in place. Adjust the voltage
switch at the rear of the QA-ES so that is corresponds to the main
voltage (115 or 230V).
5.3 Function Testing
1. Power Supply. Connect the multimeter in series on one of the
mains supply leads to measure the current consumption. Turn
Measurements should
be performed only on
main supply, and not
both 230V and 115V.
WARNING!
HIGH VOLTAGES ARE CAPABLE
OF CAUSING DEATH!
USE EXTREME CAUTION WHEN PERFORMING TESTS AND CALI-
BRATION. USE ONLY INSULATED TOOLS WHEN THE UNIT IS
PLUGGED IN, AND THE CASE HOUSING IS OFF.
The QA-ES should be
switched on for a minimum
of 15 minutes before the
test starts to ensure stable
working temperatures.
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