INSTRUCTION MANUAL
OPERATING INSTRUCTIONS
Digital Multimeter
Model 178
2-7 .
OPERATING INSTRUCTIONS. Refer to Figure 2-3 and operate the DMM as follows:
a. Turn on the power by depressing the ON/OFF pushbutton.
b
l
Select the function with the DCV, ACV or pushbutton.
c .
Select the range by depressing the appropriate pushbutton. For ac and dc voltage
measurements there are four ranges available. For resistance measurements there are
five ranges. The pushbuttons are interlocked to avoid improper settings.
d
.
Connect the source to the INPUT terminals.
POLARlTY (NEGATIVE IS INDICATED, POSITIVE IS IMPLIED WHEN MINUS (-) DISPLAY IS OFF)
D C V A C V
ELECT FUNCTION SELECT RANGE CONNECT-SOURCE
* A D J U S T ZERO AS REQUIRED FOR MEASUREMENT OF DC VOLTAGE AND RESISTANCE. SEE SEC. 2-11.
FIGURE
2-3.
Operating Controls.
CAUTION
MAXIMUM RATINGS:
D C V :
(2V): 45OV rms continuous; 12OOV peak, for
8
seconds per minute.
(20-1200V): 12OOV peak.
ACV: (All Ranges): 1OOOV rms; 10
7
V·Hz.
(All Ranges):
25OV rms sine wave or 35OV peak.