8808A/SU 120V Fluke Electronics, 8808A/SU 120V Datasheet - Page 51

• Manufacturer Part Number: 8808A/SU 120V
• Description: USB CABLE KIT SW DMM 5.5 RES
• Manufacturer: Fluke Electronics
• Type: Digital (DMM)r

Specifications of 8808A/SU 120V

• Includes: Test Leads
• Style: Bench
• Display Digits: 5.5
• Display Type: VFD, Dual
• Display Count: 200000
• Function: Voltage, Current, Resistance, Frequency
• Functions, Extra: Continuity, dB, Diode Test
• Features: Hold, Min/Max, RS-232 Port
• Ranging: Auto/Manual
• Response: True RMS
• Lead Free Status / RoHS Status: Not applicable / RoHS non-compliant
• Other names: 614-1069

Selecting a Function Modifier
Pin #
1
3
6
An external TTL signal on pin 9 will trigger a measurement cycle. Alternatively, pin 9 of
the RS-232 interface can be connected to pin 1 through an external switch. See Figure 3-
12. A measurement cycle is trigger when the switch is closed and the +5 volts from pin 1
is applied to pin 9. The trigger event occurs on the rising edge of the signal applied to
pin 9.
Figure 3-12 shows a method for using the +5V OUT (pin 1) signal with an external
switch to trigger the Meter.
This section describes the function modifiers available with the Meter. Function
modifiers are actions that the Meter performs on an input before a reading is displayed
(for example, a comparison to another value). Function modifiers can be used in
combination. See the “Using Function Modifiers in Combination” section later in this
chapter.
To use a function modifier, press a measurement function button to select that function,
and then press the function modifier button to modify that function. (For example, press
D to select dc voltage measurement, and then press I to select the Touch Hold
function to hold the results of your measurement). Note that modified readings are shown
on the primary display only.
+5 V OUT
RS-232 TXD
Trigger Out
Description
+5 V Out (Pin 1)
Trig In (Pin 9)
Figure 3-12. External Trigger Circuit
Table 3-4. RS-232 Pin Out
1 2 3 4
6 7 8 9
Pin #
2
5
9
5
RS-232 RXD
RS-232 GND
Trigger In
Operating the Meter from the Front Panel
Description
Selecting a Function Modifier
eue23.eps
eue24.eps
3-17
3