UEi Test Instruments M110A - Manual (Page 4)

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.
Clean the input terminals as follows:
1. Turn the meter off and remove all test leads.
2. Shake out any dirt that may be in the terminals.
3. Soak a new swab with alcohol and work the swab around in
each terminal.
Battery Replacement
The purpose of the batteries is to supply power to the circuit under test
while making resistance measurements. Eventually the batteries will age
to the point where it will not be possible to zero the meter with the
“Ω A D J” control. When this happens the batteries should be replaced.
The two 1.5V size “AA” batteries are used only on the Rx1, Rx10 and Rx10 0
setting of the SEL E C TOR switch and should be replaced as a pair. The 9 V
b a t t e ry affects only the Rx10K setting of the SEL E C TOR switch. It may not
be necessary to replace it when replacing the two 1.5V batteries. Observ e
the proper battery polarity when replacing batteries. It is recommended
that all batteries be removed if the M110A is not to be used for a long
period of time. Remove the single screw in the rear of the case for access
to the batteries.
WARNING!
Disconnect the test leads from the circuit under test and from the meter
prior to removing or installing batteries.
WARNING!
Under no circumstances should you expose batteries to extreme heat or
fire as they may explode and cause injury.
Fuse Replacement
The 6/10A, 0.5 ohm, fuse is in series with the “+VΩM” input jack. If this
fuse is open none of the circuit functions will work. When replacing the
fuse be sure to replace it with a fuse of the same current rating and
internal resistance. The use of a fuse with a different internal resistance
may cause the accuracy of the OHMS scale to be off. Remove the single
screw in the rear of the case for access to the fuse.
Mechanical Zero Adjust
The pointer is set to register 0 at the left hand edge of the scale when
there is no input to the M110A and it is laying face up on a flat surface.
If the pointer does not register 0, it may be reset to that position by
carefully adjusting the plastic screw in the meter face, just below the
green “FUSE PROTECTED OHMS CIRCUIT” label.
S p e c i f i c a t i o n s
Optional Accessories
Optional
Battery 1.5V, size “AA” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .AB1
Battery 9V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .AB9
Fuse 6/10A, 0.5Ω (pkg. of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . .AF10
Test leads, (set) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ATL50
Test leads, rubber (set) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ATL25
Alligator clip adapters, insulated (pr) . . . . . . . . . . . . . . . . . . . . .AAC
High voltage probe (12K V DC) . . . . . . . . . . . . . . . . . . . . . . . . . .A12K
Carrying case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .AC110
Temperature adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TA2K
M110A-MAN P. 3
Ranges
DC Millivolts 0 - 60, 300, 1200m V
DC Volts 0 - 3, 12, 60, 300, 1200 V
(0 - 12,000 V with optional probe)
DC Microamps 0 - 30, 60µ A
DC Milliamps 0 - 60, 600m A
OHMS 0 - 200Ω, 2K, 20K, 2M
AC Volts 0 - 6, 30, 60, 300, 600 V
Temperature 0 - 60, 300, 500˚F
Accuracy
DC ±3% of full scale
OHMS ±3% of scale length
AC ±4% of full scale
Temperature ±2 divisions
General
Input Impedance 30K/V DC, 15K/V AC
Batteries Two 1.5V, size “AA” (NEDA #15D) batteries
One 9 V (NEDA #1604) battery
Fuse 6/10A (0.5 ohm internal resistance) 3AG series
Note: To maintain calibration accuracy and instrument
protection, replacement fuse must be of the proper
current and resistance value.