Amprobe AM-270 Specifications download pdf (Page 25)

Temperature

RANGE ACCURACY*

-50

C TO 1000

C 0.3% + 3D

-58

F TO 1832

F 0.3% + 5D

*Thermocouple range & accuracy not included

MAINTENANCE AND REPAIR

WARNING

To avoid electrical shock, disconnect the meter from any circuit, remove

the test leads from the input jacks and turn OFF the meter before opening

the case. Do not operate with open case. Install only the same type of

fuse or equivalent

Calibration

Periodic calibration at intervals of one year is recommended to maintain meter

accuracy. Accuracy is speciﬁed for a period of one year after calibration.

If self-diagnostic message “rE-O” is being displayed while powering on, the

meter is re-organizing internal parameters. Do not switch off the meter then,

and it will be back to normal measurement shortly. However, if self-diagnostic

message “C_Er” is being displayed while powering on, some meter ranges

might be largely out of speciﬁcations. To avoid mis-leading measurements,

stop using the meter and send it for re-calibration. Refer to the LIMITED

WARRANTY section for obtaining warranty or repairing service.

Trouble Shooting

If the instrument fails to operate, check battery, fuses, leads, etc., and replace

as necessary. Double check operating procedure as described in this user’s

manual. If the instrument voltage-resistance input terminal has subjected to

high voltage transient (caused by lightning or switching surge to the system)

by accident or abnormal conditions of operation, the series fusible resistors will

be blown off (become high impedance) like fuses to protect the user and the

instrument. Most measuring functions through this terminal will then be open

circuit. The series fusible resistors and the spark gaps should then be replaced

by qualiﬁed technician. Refer to the LIMITED WARRANTY section for obtaining

warranty or repairing service.

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Amprobe AM-270 Specifications Page 25