12227 Simpson, 12227 Datasheet - Page 6

• Manufacturer Part Number: 12227
• Description: Analog Multimeters 270-5RT VOM HI A
• Manufacturer: Simpson

Specifications of 12227

• Accuracy: +/- 1.75 %
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

NOTES
6
6.
6.1
6.2
d.
e.
f.
This Instrument must be serviced by qualified personnel. To aid in troubleshoot-
ing, a schematic diagram is available on page 29. The replacement parts list
(Table 6-1) describes the components and refers to Simpson part numbers. Ref-
erence Symbol numbers on the replacement parts list correlate with the compo-
nents shown on the schematic diagram.
The following information is provided as an adjunct to the overall text contained
in this manual and should be read and understood thoroughly before ordering
replacement parts for the Instrument.
To open the Instrument panel, first de-energize and disconnect the test leads,
and remove the cover from the battery compartment. Remove the four case-
fastening screws and lift the case from the panel.
When replacing the case, make certain that the wires leading to the battery com-
partment are seated in their respective slots within the compartment wall. This
will prevent damage to the wire insulation.
To obtain replacement parts, address order to the nearest Authorized Service
Center. Refer to paragraph 2.2 for ordering instructions.
Reference
R1
R1A
R2, R22, R25 Rheostat, 3 k
R2A
R3
R4
R5
R6
R7
R8
R9
Symbol
Verify Instrument accuracy by performing operational checks using known,
accurate, stable sources. If proper calibration equipment is not available,
contact the nearest Authorized Service Center. If the Instrument has not
been used for 30 days, check the batteries for leakage and replace if neces-
sary.
It is recommended that the Instrument be returned annually to the nearest
Authorized Service Center, or to the factory, for an overall check, adjustment,
and calibration.
When not in use, store the Instrument in an environment free from tempera-
ture extremes, dust, corrosive fumes, and mechanical vibration or shock. If
storage time is expected to exceed 30 days, remove batteries.
SERVICING INSTRUCTIONS
Removing the Instrument Case
Replacement Parts
Description
Rheostat, 150 k
Resistor, 20 k
Resistor, 2.2 k
Resistor, 15 k
Resistor, 45 k
Resistor, 150 k
Resistor, 800 k
Resistor, 4 M
Resistor, 5 M
Resistor, 7.5 M
Table 6-1. Replacement Parts
Part No.
6-111487
5-119705
6-111488
5-118606
5-115082
1-117148
1-117149
1-117147
1-117151
1-118181
5-115081
27
Reference
Symbol
R10
R11
R12
R13
R14
R15
Description
Resistor, 2.5 Mk
Resistor 0.025
Shunt 10A
(Calibrate in Instrument) 6-111575
Resistor, 0.47 5W
(Wire Wound)
Resistor, 2 5W
(Wire Wound)
Resistor, 22.5 3W
(Wire Wound)
Resistor, 238
5-115080
6-111980
6-111810
6-111809
1-115079