ETS-Lindgren FM5004 Field Monitor (Archived) - Manual (Page 30)

Range Description
Auto Sets the selected channels to autorange.
1 to 4 Sets the selected channels to the desired range. See the probe
manual for a description of the units of measure and range levels.
5 Some probes may use five or more ranges; this is supported by
the FM5004.
(A LT D ISP )
To change to the alternate display mode, press Shift. Set up alternate display by
selecting ALT DISPLAY FORMAT in the Main Menu. The FM5004 supports
two display formats. See Display Format on page 36 for more information.
B ATTERY (T EMP )
B ATTERY
Press Battery to display a percentage that represents where in the discharge
curve the battery voltage is for each selected probe. This number is derived by
taking the actual voltage of the battery pack, subtracting it from the minimum
voltage level for the battery (3.18 Volts for a three-cell battery pack), and dividing
the result by the full range of the battery (maximum charge voltage minus fully
discharged voltage; 4.10–3.18 Volts for a three-cell battery pack).
Due to the non-linear discharge curve of nickel-cadmium (NiCd)
batteries, the percentage displayed does not reflect the actual
operation time left for a probe. It is recommended that for each probe,
the approximate battery life left for a given battery voltage percent be
noted. In addition, as a battery ages, the overall voltage decreases.
When the battery level drops below approximately 13% (3.3 Volts for a
three-cell battery pack), a low battery warning will display. When this
occurs, the battery should be charged as soon as possible.
When the battery voltage drops to the fully discharged level, a battery
fail indication will display. When this occurs, measurement accuracy
will be compromised by further operation.
30 | Front Panel Controls and Indicators
Archived 10/19/10