barfield TT1200A User Instruction Manual page 16

d) TEMP MEAS (Temperature Measure)
6. The RANGE switch is a four-position rotary switch that allows selection of the resistance
and insulation ranges, 20 Ω, 200 Ω, 2 KΩ and 20 KΩ (for Resistance Measuring, RES
MEAS), or 200 KΩ, 2 MΩ, 20 MΩ and 200 MΩ (for Insulation Measuring, INS MEAS.) The
fourth position is also used for 0 Ω system resistance for the IND TEST function.
7. The PTM (Press To Measure) button, when pressed, activates the TT1200A excitation and
measuring processes (when the FUNCTION switch is set to the RES MEAS or INS MEAS
position).
Note: While the TT1200A is processing the measurements, a flashing "M" appears
on the right side of the display. When the process completes, a steady "H" replaces
the "M" on the display.
8. The PTS (Press To Set) button, when pressed, activates the SYS RES switch for system
resistance adjustment. When PTS is held pressed in while rotating the SYS RES, the user
may adjust resistance to the desired resistance setting.
9. The SYS RES (System Resistance) control knob is used to adjust system lead resistance
from 2 to 25 Ω.
10. The TEST connector provides the means for connecting the TT1200A's standard leads or
specifically designed interface cabling.
11. The Display is a 16-character alphanumeric LCD that shows the user prompts and all
readings with associated units.
12. The MENU pushbutton, when pressed, causes the display to show the remaining available
battery life (Battery ###%). In addition, the user may then use the soft keys mV ( ↑ ) or
°F ( ↓ ) to scroll through display messages and option menus.*
13. The CONT pushbutton when held in and used with the soft keys mV (↑) or °F (↓), allows the
user to adjust the display contrast level from 0 to 100. The pushbutton is also a soft key
(ESC) to cancel a function and return the unit to normal operation.*
Note: Units identified with Mod D use a different P/N LCD Display to replace the original P/N
(now obsolete) and will no longer retain adjusted contrast levels but instead will revert
to the factory default at each power up.
14. The mV (millivolt) pushbutton is a toggle which, when pressed, allows the user to select
between two millivolt modes: mV and mV amb. When used with the MENU display, it is a
soft key ( ↑ ) to scroll through MENU selections. When used with the CONT pushbutton, the
user may increase the display contrast.*
Note: The mV mode simulates a DVM function equivalent to having a DVM connected in
parallel at the Test Set's red and black clips. The mV amb mode configures the
TT1200A for ambient temperature compensation performed at the point of
termination. The displayed millivolt is based on a reference junction at 0°C.
15. The °F (Fahrenheit) pushbutton is a toggle which allows selection between resolutions of
1°F and 0.1°F. The Display alternates between the resolutions with each button press.
When used with the MENU key, the soft key ( ↓ ) may be used to scroll to MENU selections.
When used with the CONT pushbutton, the user may decrease the display contrast. *
16. The °C (Celsius) pushbutton is a toggle that allows selection between resolutions 1°C and
0.1°C. The Display alternates between resolutions with each button press. The pushbutton
is also a soft key (ENT) to enter Menu confirmations.*
56-101-00930 Revision H Page 6