Page 3
Required Standards and Equipment
•
Precision AC voltage source with a range of 0 to 200V AC @60Hz with an accuracy of .25% or better.
•
To test the performance of the 61-796, you will need a set of fixed standard resistors with an accuracy
of 0.5% or better. Values required are 1
Ω
, 10
Ω
, 100
Ω
, and 1000
Ω
.
•
All three test leads should be of equal length.
C
and
P
lead connections should be made at
the standard resistors. This Source/Since method will reduce the lead resistance error in
the measurement. See Figure 1 below.
Figure 1
E, P, and C should be equal in length
and as short as possible
For best results P and C should be
connected together at the measurement
points as shown in this figure
.
PERFORMANCE VERIFICATIONS
Perform the following analysis. If the meter conforms to the limits listed in Table 1, steps 1 - 6, the meter is
functioning correctly. If the meter does not conform to any of the listed limits, the calibration procedure must be
performed.
Battery Test
•
Remove the battery cover and use a calibrated meter to ensure the battery pack measures a minimum of
11.5V DC. If the battery pack measures under 11.5V DC, replace all 8 x 1.5V batteries before
beginning the performance test.
Frequency Test
•
Turn the function switch to
20
Ω
range,
•
Connect a frequency counter to terminals
E
and
P
.
•
Press and lock the
TEST
button. The output frequency should be 820Hz ±15Hz (805Hz~835Hz).
Resistance Test
•
Connect the standard resistors to the unit under test as described in Figure 1.
•
Select
20
Ω
range.
•
Short
E
,
P,
and
C
together, adjust
0
Ω
adj
dial for 0.00 ±0.01 ohms on the LCD display.
•
Connect
E
,
P,
and
C
to the 1.0
Ω
standard resistor and verify the reading in Table 1, step 1.
•
Repeat this process for steps 2 - 6 in Table 1.
•
It is not necessary to do the
0
Ω
adj
in the 200 and 2000 range.
•
If the display reading falls outside of the range shown in Table 1, the meter does not meet specification.
Note:
Error for the lead resistance is not included or accounted for in the test data in Table 1
Table 1. Resistance Test
Step
Range
Input
Low Limit
High Limit
1 20
1.00
Ω
0.90 1.10
2 20
10.00
Ω
9.90 10.10
3 200 10.0
Ω
9.6 10.4
4 200 100.0
Ω
97.8 102.2
5 2000 100.0
Ω
96 104
6 2000 1000.0
Ω
978 1022
Form number TM61796
Rev 2 May 2008
