718Ex Approved Batteries; Replacing The Fuse - Fluke 712 Calibration Manual

718Ex Approved Batteries

Battery
Alkaline, 9 volt
Alkaline Ultra, 9 volt
Alkaline Energizer, 9 volt
Alkaline Power Line Industrial Battery, 9 volt

Replacing the Fuse

To avoid personal injury or damage to the calibrator, use only a
0.125A 250V fast fuse, Littelfuse
To check if the fuse(s) are blown, refer to Table 33.
Calibrator Model
712 V1.1 Put the calibrator in simulate mode (OUTPUT on the display), and check for proper
resistance at the calibrator's OUTPUT terminals. An open or very high impedance
suggests fuse F1 is blown.
712 V1.2 Fuse F1 is probably blown if no current comes from the center jacks when in input
2W mode. Fuse F2 is probably blown when output mode will not work.
712 ≥V2.0
Fuseless overvoltage protection.
713 Series Fuse F1 is probably blown if the mA measurement display reading does not
716 respond to current applied to the current (mA) inputs.
717 Series <V1.9
718 Series <V1.9
717 Series ≥V2.0
Fuseless overvoltage protection.
718 Series ≥V2.0
714 <V1.9 Fuse F1 is probably blown if, in the input mode, the calibrator always reads OL,
even with a thermocouple connected.
714 ≥V2.0
Fuseless overvoltage protection.
715 Fuse F1 is probably blown if:
•
•
Fuse F2 is probably blown if:
•
•
715 ≥V2.0
Fuseless overvoltage protection.
718Ex No user serviceable fuse. An open fuse voids safety certification. The unit should
be returned to Fluke for repair.
Manufacturer
Duracell
Duracell
Eveready
Panasonic
XW Warning

Table 33. Verifying a Blown Fuse
Determining a Blown Fuse
in the mA input mode, the calibrator always reads 0.000, even with a signal
applied.
in the mA output mode, with a short across the mA OUTPUT jacks, OL is
flashing on the display.
in the V output mode, with the test leads removed from the calibrator, the
display flashes OL.
in the V input mode, the calibrator always displays OL, even with a signal
applied that is within the measurement range.
6LR61/MN1604
6LR61/MX1604
6LR61/522
6LR61.9V
2AG.
Process Calibrators
Basic Maintenance
Type
23