Escort 3136A Operation Manual page 13

The "line voltage selector" is settable for 100Vac, 120Vac, 220Vac,
and 240Vac line voltages.
The correct fuse ratings: 250mA fuse for 100Vac or 120Vac is selected,
and 125mA fuse for 220Vac or 240Vac is selected.
Case, Panels and Holsters
To avoid electric shock or injury, do not operate the meter without panels
or case in place.
The meter is provided with special designed anti-slippery protective
holsters on the front and rear panel sides (shown in Figure 2-1 and 2-2).
The holsters provide a protection to both front and rear panels of the meter
as well as its corners. User may stack up one meter on the top of the other
without concerning the slide off of the units (shown in Picture 2-1).
The holsters can be easily removed when install the rack-mounted ears to
the meter in order to mount the meter into a 19-inch standard rack. Refer
to Section 2-7 for Rack Mounting procedures.
Picture 2-1. Stack up the Meters with Holsters
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