Page 10
4.4.2 On/Off operation without AC Power
With no AC power connected, operation is from the internal rechargeable batteries and the
instrument is turned on or off by successive presses of the green [OPERATE] button. The rear
panel POWER switch has no function.
4.4.3 Power-up Settings
At power up the display briefly shows the installed software revision; the instrument is then restored
to the same measurement conditions as at power down, including any advanced functions that were
running. However, if the instrument was showing a menu at power down, the menu will be
cancelled when powered up.
5 Measurement Connections
5.1 Input Sockets
The input sockets are 4mm safety sockets on a 19mm pitch designed to accept 4mm safety
plugs with fixed or retractable shrouds. All sockets are rated to 1000Vpeak with respect to earth
ground. Safety will be maintained if voltages up to 1000Vpeak are accidentally applied between
inappropriate terminals in excess of their marked ratings, but restoration of normal operation
may require replacement of protection devices (e.g. current range fuses).
The input impedance between INPUT HI and INPUT LO is nominally 10M: on dc ranges and
1M: on ac ranges. The black LO socket is considered less positive than the red socket. The
maximum voltage that can be applied between HI & LO is 1000Vdc, 750Vrms (1000Vpeak).
The sockets are rated to 600V CAT II, 300V CAT III.
The mA/10A current sockets are low impedance; the voltage burden between mA/10A and LO
at full scale is <100mV for the 10mA range and <600mV for the 100mA, 1A and 10A ranges.
The black LO socket is considered less positive than the white mA/10A sockets. The mA/1A
socket is protected with a 1.6A 1kV HRC fuse, and the 10A socket with a 10A 1kV fuse; see
Maintenance, section 14, for replacement details.
The SENSE HI & LO sockets are only used in 4-wire Ohms and RTD temperature
measurements; refer to those sections for details. When used, the maximum differential
between SENSE LO and INPUT LO should be < 0.5Vpeak. The SENSE terminals are
protected against accidental connection of up to 200Vpeak between HI & LO.
Display
Measurement
terminals
Measurement keys
Navigation
keys
Function keys
Power
Function keys
To Next Page
Loading...
Need help?
General
