Introduction Page 19 of 76
Section 1: Introduction
1.1 Unpacking and Inspection
Inspect the shipping carton before opening. If damaged, contact the carrier agent immediately.
Inspect the 1855 Capacitor Leakage Current/IR Meter 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 original shipping carton and packing material for future use
such as returning the instrument for recalibration or service.
1.2 Product Overview
The 1855 Capacitor Leakage Current/IR Meter is a compact yet powerful LC Tester and IR
meter for production or laboratory testing of aluminum electrolytic capacitors, resistors and other
passive components. The 1855 instrument measures 4 parameters: Leakage Current (LC),
Insulation Resistance (IR), Rise Time (Tr) and Withstand Voltage (Vf) and displays two
simultaneously. Basic accuracy is ±0.3%. From 1-8 measurements can be made, averaged and
the result displayed with the Averaging function. Ranging is automatic or user selectable.
Measurement rate is also selectable (Slow, Medium or Fast) with rates up to 18 measurements
per second. Measurements can be made continuously or triggered with a programmable delay
time up to 10 seconds. The 1855 comes standard with an RS-232 interface. An optional IEEE-
488 and Handler interface is also available. Voltage across the DUT can be monitored and
displayed. Zero the effects of stray leakage in the test leads with the Null function. The Compare
function on the 1855 instrument has programmable upper and lower limits and displays Pass/Fail
in addition to the measurement value. Connection to the device under test is through 1 BNC
INPUT terminal and 2 Banana HV terminals on the front panel.
1855 Capacitor Leakage Current /IR Meter
(-)(+)INPUT
QuadTech
+
HV
F1
F4
F3
F2
F1
F3
F2
MEAS
DISPLAY
F4
TRIGGER
MAIN
INDEX
SYSTEM
SETUP
01
l
<MEAS. DISPLAY: SEQ. TEST>
NEXT PAGE 1/2
2
0.5
TEST V
LC :
1.0
C.C
RANGE
1.5 mA
CHARGE/TEST DISCHARGE
CHARGE TEST DISCHARGE
:
:
:
V
mA
uA
-
A
Figure 1-1: 1855 Capacitor Leakage Current/IR Meter
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