12391 NIST CAL CERT Simpson, 12391 NIST CAL CERT Datasheet - Page 27

• Manufacturer Part Number: 12391 NIST CAL CERT
• Description: Analog Multimeters 260-8P VOM NIST CAL CERT W/O DATA
• Manufacturer: Simpson

Specifications of 12391 NIST CAL CERT

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

5.
5.1
5.2
5.3
The following paragraphs of this section describe battery replacement, fuse re-
placement, and preventive maintenance procedures for the 260.
The user is protected from electrical shock by the insulation of the 260 and its test
leads. Frequently examine them for any insulation damage such as cracks, cuts,
chips, burns or deterioration that expose internal metal parts or reduce the spac-
ing between such metal parts and hand contact by the operator.
Make certain that the battery compartment cover is securely fastened in place
before the Instrument is used.
Do not permit an instrument with a broken meter glass to be used.
Whenever the battery compartment cover is removed for any reason, check that
the proper fuses are being used.
a.
b.
c.
NOTE: Batteries should be replaced before their useful life has expired. Failure to
do so may result in corrosion and battery leakage.
d.
The 1 and 2 ampere fuse (also the 1A spare) is located in the externally acces-
sible battery and fuse compartment. Access to the compartment is obtained by
disconnecting the test leads and loosening the single captivated screw on the
compartment cover. To replace or check a fuse: Apply pressure to the 1 amp fuse
cup then rotate the plate to expose a selected fuse for removal from the panel’s
cavity.
NOTE: When you replace a fuse, make sure it is the same type and value as the
fuse you have just removed.
OPERATOR MAINTENANCE
Inspection
Battery Replacement
Two batteries are used inside the case to supply power for resistance mea-
surements. One is a 1.5-volt D cell and the other is a 9 volt battery. When it is
no longer possible to adjust the pointer to zero for the R X 1 and R X 100
ranges (refer to ZERO OHMS ADJUSTMENT paragraph 4.21) replace the
1.5 volt cell. When it is no longer possible to adjust the pointer to zero on the
R X 10,000 range, replace the 9 volt battery.
Recommended replacement batteries are:
1.5V D cell, NEDA 13F (Duracell MN or Eveready No. 95). 9V battery, NEDA
1604A (Duracell MN1604 or Eveready 522).
To install or replace a battery, de-energize and disconnect test leads from the
Instrument, then remove the cover to the externally accessible battery com-
partment by loosening the single captivated screw.
Observe polarity when replacing the 1.5 volt D cell and connect as indicated.
The D cell is held in place with spring clips which also act as battery contact
clips. The 9 volt battery contacts and connector are polarized. To remove the
9 volt battery, first withdraw battery with mated connector from the compart-
ment. Then remove the connector.
Fuse Replacement
27