UEi Test Instruments DMEG3 - Manual (Page 10)

M a i n t e n a n c e
Service
This instrument contains no user serviceable parts other than the fuse
and batteries. All servicing is to be accomplished by UE i .
Annual ca l i b ration is recommended and can be conducted by a local
ca l i b ration facility or at UEi’s factory headquarters in Beaverton, Oregon.
Cleaning
The external surfaces and empty battery compartment should be
inspected for dirt and contamination on a regular basis. They can be
cleaned using a damp (NOT WET) cloth and a mild cleaning detergent.
Do not allow water, detergent or other liquids to puddle on the surface
or flow inside the instrument. In the event of accidental liquid intrusion,
return the instrument to UEi for service and evaluation.
Battery Replacement
Battery replacement is required when no powered functions will
operate (also check fuse) or when a low battery indication is provided
(see “controls and indicators” section of this manual).
Equipment required:
• #2 Phillips screw driver
• Replacement batteries (quantity 6), size: AA
(NEDA #15A) alkaline recommended
WARNING!
DO NOT attempt this maintenance action with power applied to the
instrument either through its test leads or by way of the “Press to
Test” button being pressed.
To replace the batteries, turn the instrument upside down on a clean,
flat surface to expose battery compartment.
1. Remove the battery cover retaining screw.
2. Apply outward pressure (away from the carrying handle)
on the battery cover and remove it from the instrument.
3. Remove and replace all six batteries at the same time.
Use caution when removing batteries to ensure that any acidic material
leaking from the batteries does not come into contact with your skin
and has not damaged the instrument.
Dispose of batteries in accordance with your local solid-waste disposal
regulations. Never expose batteries to high temperature or incineration.
Fuse Replacement
Fuse replacement is required when no “Press to Test” functions will
operate or when it has been proven defective through evaluation.
Equipment required:
• #2 Phillips screw driver
• Replacement fuse (quantity 1), replace only with the fuse
type listed on instrument’s back panel
DMEG3/IRT3-MAN P. 9
Scale Key
When using Multiply Meg Ohms
Reading By
250V MΩ x .5 = actual value
500V MΩ x 1 = actual value
1000V MΩ x 2 = actual value
In example 100 MΩ will be seen as:
250V: 200 MΩ
500V: 100 MΩ
1000V: 50 MΩ
This reading is:
250V - 50 MΩ
500V - 100 MΩ
1000V - 200 MΩ