Ecom Instruments MCAL 4200 Instruction Manual page 56

The contrast menu is usually the next menu level. Its options are [CONTRAST], [NEXT], and
[DONE]. The [CONTRAST] option is used to adjust contrast. [NEXT] proceeds to the auto off
main menu, and [DONE] returns to home menu. Contrast is adjusted using the arrow options,
which are available after choosing [CONTRAST].
NOTE: The MCAL 4200 calibrator offers a wide range contrast adjustment feature to accom-
modate operation in extreme temperatures.
In certain cases making large changes in contrast may render the display difficult to read
under normal conditions. If this occurs and the display is too dim or dark to read, proceed with
the following process to set the contrast back to a default setting.
1. Turn on the unit while holding down the "HOME" key.
2. Hold the key down for a count of 10 seconds to restore contrast default settings.
If the display is so dim that you cannot tell if the unit is on or off, use the backlight key to
determine if the power is on or off.
The auto off main menu contains the options [AUTO OFF], [NEXT], and [DONE].
The [AUTO OFF] option is used to turn the automatic shutoff on and off and set the amount of
time the unit needs to stay dormant to shut off. [NEXT] and [DONE] both return to home menu.
When the lower display is in the frequency or pulse mode, the frequency level menu is added
after the main menu. The options available in this menu are [FREQ LEVEL], [NEXT], and [DONE].
The [FREQ LEVEL] option is used to adjust the amplitude of the wave. [NEXT] is used to access
the contrast main menu, and [DONE] returns to the home menu.
When the calibrator is in RTD CUSTOM mode, the RTD custom setup menu, is inserted after
the main menu. Options [SET CUSTOM], [NEXT], and [DONE] are available. [SET CUSTOM] is
used to enter a custom PRT into the calibrator. Refer to Section 4.9-1 for instructions.
[NEXT] is used to enter the contrast main menu, and [DONE] to return to the home menu.
The pressure zeroing main menu is the final variation to choosing [MORE] in the main menu.
It has the options [ZERO ], used to zero pressure, [NEXT] and [DONE], which have the same
function as above. Refer to the Section 5.3 for instructions on zeroing.
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