B&K Precision 875B - Manual - Manual (Page 9)

2H, 20H, 200H, range (Lp): Zero Adjustment & Measurements
(1) Set the power switch to “on” position.
(2) Set the mode switch to the “LCR” position.
NOTE: These three ranges (Lp mode) must be zero calibrated at
200mH range.
(3) Set the Function/Range switch to the 200mH range.
(4) Using a short piece of wire, such as a paper clip, temporarily
connect the po sitive and nega tive m easurement terminals
together. A lternatively, if t he clip leads w ill b e u sed for the
measurement, plug them into the banana jacks and connect
the clip together.
(5) Use a small, flat-blade screwdriver and slowly turn the “ 0 Adj”
control to calibrate the display for a zero reading. Remove the
calibration short.
(6) Insert the inductor leads into the component test sockets at the
front of the meter. If the leads are too short, use the alligator
clip leads pro vided w ith the instrum ent to connect t o the
inductor.
(7) Read the inductance value in the display. If “1---“ (a one with
the fo llowing 3 d igits b lanked) is shown, move the ra nge
switch to the next higher range until the over range indication is
gone from the display and a value is obtained.
(8) To measure the “Dissipation Factor” of th e inductor, set the
mode switch to the “D” position, and read the dissipation factor
value in the display.
2.3.3 Resistance Measurements
NOTE: A. The 2, 20, 200, 2K, 20K, 200K, ohm ranges of resistance
needs to be zero adjusted separately.
B. It can not be zero adjusted at 2M and 20M range. There
is always a reading about .120-.140 when input
terminals are shorted to zero adjust
, set the range
switch to 200K range and zero adjust.
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