QuadTech 1865, Инструкция по эксплуатации, Страница: 21 / 87

Introduction Page 21 of 87
Section 1: Introduction
WARNING
High voltage is applied to the measurement terminals of the 1865 anytime the CAUTION HIGH
VOLTAGE LED is ON. While the current from the instrument is limited to a value that is not dangerous
under most conditions, the energy stored in a capacitor connected to the terminals may be lethal. Always
make sure the CAUTION HIGH VOLTAGE LED is OFF when connecting or disconnecting the unknown.
1.1 Unpacking and Inspection
Inspect the shipping carton before opening. If the carton is damaged, contact the carrier
agent immediately. Inspect the 1865 instrument for any damage. If the instrument
appears damaged or fails to meet specifications notify QuadTech (refer to instruction
manual front cover) or its local representative. Retain the shipping carton and packing
materials for future use such as returning for recalibration or service.
1.2 Product Overview
The 1865 Megohmmeter/IR Tester is a general purpose high voltage instrument for
resistance measurements on insulating materials and components. It is designed for
easy, accurate and direct readings of high resistance typically found in synthetic resins,
porcelains, insulating oils, plastics and other similar materials. It is also used for
measurements on capacitors, transformers, switches, cables and connectors. The 1865
provides a direct readout of resistance from 1000
Ω
to 1000T
Ω
with fully automatic
ranging. The voltage applied to the unknown is programmable from 1V to 1000V.
The 1865 includes a high resolution graphics display and keypad for ease of use. The
test cycle is fully automatic with programmable charge, dwell, measure and discharge
times. These times, along with other test conditions can be stored in instrument memory
and recalled for later use. A pass/fail indicator provides the operator with a visual
indication based on a preset resistance limit. The unit also contains automatic zeroing at
the test leads as well as built-in self-test routines. Safety features include current
limiting to less than 2mA and a front panel indication when voltage is applied to the test
terminals, thus permitting connections to be made safely.
The 1865 comes standard with I/O Port (handler) and RS232 interface. An IEEE-488
interface is optional for communication with other instrumentation and remote control
operation. A 3 1/2" floppy drive option is also available for storing test conditions and
results. There is a direct reading current measurement mode from 1mA to 1pA.
The unit is available with front or rear panel input connections with guard and ground
terminals to permit measurements of grounded or ungrounded devices.