WattMaster WHP | Section 4 |
|
|
5.3.8Checking the MiniLink Local Loop Driver
Diagram
Meter Set To Read DC Volts
The indicated values are typical of a normal operating system. Actual readings may deviate slightly.
These tests assume that the MiniLink is powered up.
Note:Overview
This test checks for proper Local Loop voltages coming from the MiniLink.
The Local Loop LED (located near the connector) should “flicker” when the Mini-
Tip:Link is operating and when first powered up. If the LED is not flickering, the unit is not functioning.
Proper loop voltages are essential for reliable communications. It is normal to see fluctua- tions at this point on the MiniLink. The average value should be close to the acceptable range described below. Values will vary upon initial powerup for about
Measurements
|
|
|
2.9 - 3.1 Volts DC | AcceptableRange | |
(SHLD) |
|
|
|
|
|
R – G | 1.9 - 2.1 Volts DC |
|
(SHLD) |
|
|
|
|
|
Action
If voltages are tooConditionhigh or too low on either side
1.The MiniLinkActionhas a damaged Comm Driver chip. Locate and replace the driver chip(s). See "1.3.11 Comm Driver Chip Replacement”.
2.The MiniLink is not functioning.
|
