33
performance and speed is acceptable.
Slow
Slow sets speed to 5 readings per second.
SLOW provides better noise performance at the expense of
speed.
Note:
The integration time can be set for any measurement function except frequency, period,
continuity (FAST) and diode test (Medium). For frequency and period,
this value is little
excess a gate time.
4.2 Trigger Operations
The multimeter‘s triggering system allows you to generate triggers either manually or automatically or
externally and take multiple readings per trigger. The following paragraphs discuss front panel triggering,
and the reading hold feature.
4.2.1 Trigger flow
Wait for Trigger
The control source holds up operation until the programmable event occurs and is detected. See
description below for trigger sources:
Immediate
With this trigger source, event detection is immediately satisfied allowing operation to continue.
External
Event detection is satisfied for both kinds of triggers as below:
1. A bus trigger (*TRG) command is received.
2. The front panel
Trig
key is pressed (TH1942 must be taken out of remote before it will
respond to
Trig
key).
Take steps below for trigger settings:
1. Press
Shift
→
to enter the menu on the menu level,
―
A: MATH MEU
‖
will be displayed.
2. Use
or
key to move across to the TRIG MEU on the menu level,
―
B: TRIG MEU
‖
will
be displayed.
3. Press
to move down to the command level within the TRIG MEU.
4. Use
or
key to move across to the TRIG MODE command on the command level,
―
1:
TRIG MOD
‖
will be displayed.
5. Press
to move down a level to select a trigger source.
6. Using
or
to select IMM, MAN or BUS trigger source.
7. Press
(ENTER) to confirm the choice. The message
―
SAVED
‖
will be displayed to show that
the change is now in effect. TH1942 automatically exits the parameter level and moves up a level to
the command level.
Measurement Sample
The primary measurement sample action is a measurement. However, the measurement sample action
block could include the following additional actions:
Hold
—
with hold enabled, the first processed reading becomes t
he ―Seed‖ reading and operation
loops
back within the measurement sample block. After the next reading is processed, it is checked to see if it
