Tegam 3550 - Comparator State Annunciators

4-19
Model 3550 LCR Meter Instruction Manual Operating Instructions
Front Panel Description cont’d:
16 Comparator State Annunciators
Located in the Comparator Panel there are three total comparator state annunciators. The
annunciators become active when the comparator is on. The comparator is turned on by pressing
the [ON] key in the Comparator Panel. See below for a summary of the annunciator functions.
Annunciator Functional Description
DISP-A LO-HI
Indicates when the measured value of DISPLAY A is equal to or outside of the
Low or High Comparator setting.
DISP-B LO-HI
Indicates when the measured value of DISPLAY B is equal to or outside of the
Low or High Comparator setting.
TOTAL GO
Indicates when the measured value of DISPLAY A and DISPLAY B are within
the High and Low limits of the Low or High Comparator setting. If DISPLAY A
comparator is disabled then the TOTAL GO DISPLAY B determines condition
only. If DISPLAY B comparator is disabled then the TOTAL GO condition is
determined by DISPLAY A only.
17 Sample LED (Trigger Status)
This LED displays the measurement status. When the TRIGGER mode is set to "INT", this LED will
flash continuously. When the TRIGGER mode is set to "MAN/EXT", this LED will flash every time a
measurement is made.
18 "COMPARATOR ON/OFF" Switch – [ON]
This switch enables or disables the Comparator. When the switch is in the ON state (LED on), the
BIN Display LED, Comparator State Annunciators, and Comparator functions are enabled.
19 "DISPLAY B" Parameter Selection Key - [B]
Press this key to select the measurement parameter of DISPLAY B. Measurements of D, Q, RS, RP,
G, X, B and LJ are available.
20 "DISPLAY B"
Measured values of D, Q, RS, RP, G, X, B and LJ are shown in this panel. The measurements values
are displayed with 4
1
/
2
- digit resolution. In addition, units of measure are annunciated above and
beside the display for reading convenience.
To change the parameters shown by DISPLAY B, press the [B] key located in the DISPLAY A-B
instrument panel until the desired annunciator is lit.