Service Information
5
-1
10 TEGAM WAY ● GENEVA, OHIO 44041 ● 440
-466-
6100 ● FAX 440
-466-
6110 ● [email protected]
5.
S
ERVICE
I
NFORMATION
Inspection and Cleaning
To extend the life of the instrument, inspect and clean the instrument regularly. Inspect the
instrument for any significant abrasions, cuts, cracks, dents, or other signs of damage on
the case, keypad, and display lens. Inspect the connectors for breaks, dirt, or corrosion.
Ensure all screws are securely fastened, and if equipped,
that the tilt stand/magnet/hanger
i
s in good condition and locks into position properly.
With all screws securely fastened and the battery compartment cover in place, use a damp
cloth or towel to wipe down the instrument. Use care to avoid scratching the display
lens.
Mild, non
-
abrasive detergents may be used providing the instrument is then wiped down
with a clean damp cloth or towel.
Calibration
5.2.1
Verification Procedure
1.
This procedure shall be performed within environmental conditions of 23 ±
3
°C
and 5% to 95% RH.
2.
The unit under test (“UUT”) shall be acclimated to the controlled environment for a
minimum of four (4) hours.
3.
Power on
the
720A
for a min
i
mum of ten (10) minutes.
To disable Auto
-
Power Off,
4.
The equipment listed in
Appendix A
is required to fully verify the UUT
.
5.
Refer to
Appendix B
for standard measurement points and tolerances for each
720A
resistance range
.
6.
Record
standard resistance values on the Instrument Verification Data Sheet
in
Appendix B.
7.
Calculate high and low limits using tolerances noted in
Appendix B.
8.
If not already, connect the
M12
connector
s
of the bond meter probes.
9.
Press
until
UUT
is
in 100 Ω range.
If UUT is in AUTORANGE, press
once.
10.
Connect the UUT leads
to
the 100 Ω
resistance
standard
.
11.
Note
value in “Reading” column of
Appendix B.
12.
Indicate if the value
exceeds
the high limit or
low limit calculated in Step 6 using
“Pass/Fail” column of
Appendix B.
13.
Staying in the 100 Ω range, connect UUT leads to 10 Ω standard and record
value.
14.
Indicate if the value
exceeds
the high limit or
low limit calculated in Step 6 using
“Pass/Fail” column of
Appendix B.
15.
Press the
to put UUT into 10 Ω range and record value.
