TM 55-4920-429-13
(3) Set the SELF TEST switch to each of the settings listed below. The readings on the dmm and
the external multimeter shall be as listed below. The corresponding indicator, VAC or VDC, shall
come on.
DIGITAL MULTIMETER
SWITCH POSITION
DMM READING
READING (8800A)
DMM +5 VDC
+4.92 To +5.08
+4.990 To +5.0l0
DMM +15 VDC
+14.81 To +15.19
+14.970 To +15.030
DMM -15 VDC
-14.81 To -15.190
-14.970 To -15.030
DMM +3.6 VAC
+3.26 To +3.94
3.42 To 3.78
DMM -3.6 VAC
-3.26 To -3.94
3.42 To 3.78
DMM 13 VAC
DMM 26 VAC
DMM -7 VDC
DMM +7 VDC
DMM +12 VDC
DMM -15 VDC
DMM +15 VDC
DMM +28 VDC
+11.72 To +14.28
+23.20 To +28.80
-6.83 To -7.17
+6.83 To +7.17
+10.85 To +13.15
-14.81 To -15.19
+14.81 To +15.19
+23.00 To +29.00
12.20 To 13.80
24.40 To 27.60
-6.93 To -7.07
+6.93 To +7.07
+11.00 To +13.00
-14.97 To -15.03
+14.97 To +15.03
+23.00 To +29.00
(4) Set SELF TEST and METER SOURCE switches to OFF.
4-30. Multimeter Tests. This test ensures the accuracy of the dmm and the analog meter and
associated circuits.
a. VDC Range Tests.
(1) Connect the digital
posts.
(2) Set the FDBK MON
multimeter, set to measure dc volts, across the HI (+) and LO binding
switch to LCT.
(3) Set the METER SOURCE switch to ACTUATOR DRIVE.
(4) Connect the variable dc power supply to receptacle pins J3-x (+) and J3-C. Adjust the power
supply to the voltages listed below. The VDC indicator shall come on. The K-OHM and VAC indictors
shall be out. (See FO-8 for connector pin patterns.)
TEST VOLTAGE (J3-x)
DMM
ANALOG METER
+.1000
+.098 to .1020
N/A
-1.000
-.991 to -1.009
-.92 to -1.08
+10.00
+9.88 to +10.12
+25.00
+9.2 to +10.8
+24.50 to +25.5
N/A
4-11
