UEi Test Instruments M20 - Manual (Page 3)

S p e c i f i c a t i o n s
Standard Accessories
Test leads (set) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ATL3
Alligator clip adapters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .AAC
Fuse 0.15A, 2Ω . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .AF2
Battery 1.5V, size AA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .AB1
M a i n t e n a n c e
Periodic Service
WARNING!
Repair and service of this instrument is to be performed by qualified
personnel only. Improper repair or service could result in physical
degradation of the meter. This could alter the protection from
electrical shock and personal injury this meter provides to the
operator. Perform only those maintenance tasks that you are
qualified to do.
These guidelines will help you attain long and reliable service from
your meter:
• Calibrate your meter annually to ensure it meets original
performance specifications
• Keep your meter dry. If it gets wet, wipe dry immediately.
Liquids can degrade electronic circuits
• Whenever practical, keep the meter away from dust and
dirt that can cause premature wear
• Although your meter is built to withstand the rigors of daily
use, it can be damaged by severe impacts. Use reasonable
caution when using and storing the meter
Cleaning
Periodically clean your meter’s case using a damp cloth. DO NOT use
abrasive, flammable liquids, cleaning solvents, or strong detergents as
they may damage the finish, impair safety, or affect the reliability of the
structural components.
Battery Replacement
The internal 1.5V battery affects only the OHMS function. It should be
replaced when it is no longer possible to zero the pointer with the
“OHM ADJ” control. Remove battery if M20 is not to be used for a
long period of time. Remove single-screw in rear of case for access to
battery. Observe polarity.
Fuses
The fuse affects only the OHMS function. Replace fuse only with one of
same current rating and internal resistance, 0.15A and 2.0Ω. Use of a
fuse with different internal resistance may cause inaccuracy on the
OHMS scale. Remove single screw in rear of case for access to fuse.
Mechanical Zero Adjustment
The pointer should indicate 0 at the left hand edge of the scale with no
input and M20 placed face up on a flat surface.
To reset pointer, carefully adjust clear plastic screw located in meter face.
M20-MAN P. 2
AC Voltage ±4% of full scale 0 - 10, 50, 250, 500 Volts
DC Voltage ±3% of full scale 0 - 10, 50, 250, 500 Volts
Direct Current ±3% of full scale 0 - 250 mA
Resistance ±3% of scale length 0 - 5K, 50K, 500KΩ
Internal Battery 1.5V, size “AA”
Fuse 0.15A, 2Ω