8845A/SU 120V Fluke Electronics, 8845A/SU 120V Datasheet - Page 84

• Manufacturer Part Number: 8845A/SU 120V
• Description: PREC MLTMTR DMM BNCH 6.5 DIG RES
• Manufacturer: Fluke Electronics
• Type: Digital (DMM)r

Specifications of 8845A/SU 120V

• Includes: Test Leads
• Style: Bench
• Display Digits: 6.5
• Display Type: VFD, Dual
• Display Count: Varies
• Function: Voltage, Current, Resistance, Frequency
• Functions, Extra: Continuity, dB, Diode Test
• Features: Memory, RS-232
• Ranging: Manual
• Response: Average
• Lead Free Status / RoHS Status: Contains lead / RoHS compliant by exemption
• Other names: 2675292; 614-1001

8845A/8846A
Users Manual
4-16
Checking Diodes
None
The diode function sends a current through a semiconductor junction while the Meter
measures the voltage drop across the junction (or junctions). Measurements are displayed
in the 10 V range at a relatively fast measurement rate. "OPEN" is displayed for voltages
10 % above the compliance voltage setting. Typical junction voltage drop on good
junctions are 0.3 to 0.8 volts. If enabled, the beeper will make a short beep when a good
junction is detected. Shorted diodes will indicate a significantly lower voltage.
With the higher compliance voltage (up to 10 V), the Meter’s diode test function can test
zeners up to 10 volts, diode stacks and LEDs. The selectable current and maximum
voltage allows you to tailor the diode test to the expected voltage for the junction being
tested.
To check a diode:
1. Press S twice on the 8846A or D once on the 8845A. An example of the diode
2. Select the test voltage and current appropriate for the diode being tested by pressing
3. Connect the test leads as shown in Figure 4-8.
Function modifiers:
None
test display is shown below.
the associated soft keys.
F1
+
Figure 4-8. Diode Testing Connections
0.5994
F2
F3
F4
F5
2
2W/4W
4
mA
1000 V CAT I
00
HI
LO
600V CAT II
V
INPUT
FUSED
REAR
1V
SENSE
FRONT
4 W
300V
10A
HI
LO
caw024.eps
caw13f.eps