The DO7 is a practical instrument for low resistance
measurement, ideal for use in the workshop, field or test facilities.
It is of rugged construction in a sealed ABS plastic case with lid
and carrying handle. The DO7 has many advanced features,
including protection up to 415 volts rms at the measuring
terminals, digital calibration and long scale length, 6000 count.
Rechargeable batteries mean real portability with more than 1
hour of continuous operation on the lowest ranges, and 20 hours
on all others. Battery charge indicators are provided. The internal
charger will boost charge to 90% of full charge, switching
automatically to a trickle maintenance charge.
Warning LEDs
illuminate when an open circuit lead condition is detected. A front
panel socket provides a serial RS232 output for connection to an
external printer or PC, and a socket is also provided for the
connection of an external start switch, e.g. a foot switch.
The
DO7 is supplied ready for use with batteries, mains cord and test
leads, no extras are normally necessary. For special lead sets we
offer a variety of different styles.
Key Features
10 Amp measuring current
Rechargeable batteries with built-in charger
Measuring range 600 micro ohm...60 ohm
Resolution 0.1 micro ohm on 600 micro ohm range
0.8" LED display daylight viewable
Auto average of forward and reverse measurement
Remote start socket
All solid state design
Wide range of leads and accessories available
True 4 terminal measurement eliminates lead
resistance errors
RS232 printer output


Data Sheet
|
Specifications
Measurement
4 Terminal Kelvin / Thomson principle eliminates errors due to
lead resistance. Open circuit measurement voltage = 2V dc
Display
0.8" LED 6000 count with automatic decimal point and
polarity indication
Ranges
6 push button selected with LED indication
Terminals
6mm binding posts accept spade tags and 4 mm banana plugs
Working Temperature
0degC to 40degC rel. humidity 80% max. non-condensing
Storage Temperature
-20 to +50 degC
Mains Supply
100 / 120 / 220 / 240 Volts
+10% - 13% 47Hz to 63Hz. max 80VA
Safety
IEC 1010 Protective Class 1
Dimensions
343mm x 327mm x 152mm (W D H) approx
Mass
8kg approx
Protection
415 Vrms maximum at input terminals
Calibration
Digital, security key protected
Battery
Sealed lead acid, rechargeable cells giving a minimum of 1 hour of
continuous measurement on the lowest 10 amp ranges and 20
hours on all other ranges. Internal charger with battery
state indicator
Average
Automatic average and display of measurement with forward
and reverse current
|
|