Amprobe AM-270 Industrial-Multimeter - Manual (Page 25)

19
Temperature
RANGE ACCURACY*
-50 O C TO 1000 O C 0.3% + 3D
-58 O F TO 1832 O 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.