1.4
Specification
Prior to connecting this instrument always ensure that the circuit under test is electrically
isolated. Connecting this instrument to circuits which have not been isolated could lead to
a hazard.
1.4.1 Measurement
accuracy
1.4.2
Temperature compensation accuracy
The accuracy of the temperature measurement is
±
0.1% and uses a standard Pt100 sensor
(EN60751). This accuracy does not include errors due to the sensor itself. The temperature
measurement range is 0…+100
°
C and the default resistance measurement is referenced to
20
°
C when this option is used. Other reference temperatures may be selected by the user
over the range 0
°
C to +50
°
C
1.4.3 Conditions of use
The DO7PLUS is suitable for indoor and outdoor operation.
Maximum altitude: 2000m
Installation category: 50V CATIII
Pollution degree: 2 (according to IEC61010 1)
Storage temperature: 20
°
C…+50
°
C
Operation temperature: 0
°
C…+40
°
C
Relative humidity: up to 90% non condensing @ 31
°
C
IP Rating: IP 53 with lid open
IP 67 with lid closed
1.4.4
Lead resistance
The DO7PLUS will operate with long lead lengths providing the maximum lead resistance
does not exceed the following:
Current Leads Maximum resistance 60m
each lead (120 m
total)
Potential leads Maximum resistance 1k
each lead (2k
total)
1.4.5
DC Power Input
9 36VDC, 4A max
1.4.6 External Mains Power Unit
External mains psu 90V...253V, 47Hz...63Hz. Interchangeable leads International use (only
one lead supplied with instrument).
1.4.7
Battery Operation
Two internally fixed NiMH battery packs, with gas gauge circuits to monitor battery capacity.
An internal battery charger for each battery provides intelligent charging with automatic fast
and maintenance charging as required. The percentage of full charge for each battery is
indicated on the LCD display.
Range
Measuring
Current
Resolution
FSV
Accuracy at full rated current
6.0000m
10A
100n
Ω
60mV
±
(0.05%Rdg+0.01%FS)
60.000m
1
A
1μ
Ω
60mV
±
(0.05%Rdg+0.01%FS)
600.00m
100mA
10μ
Ω
60mV
±
(0.05%Rdg+0.01%FS)
6.0000
Ω
10mA
100μ
Ω
60mV
±
(0.05%Rdg+0.01%FS)
60.000
Ω
1mA
1m
Ω
60mV
±
(0.05%Rdg+0.01%FS)
600.00
Ω
100μA
10m
Ω
60mV
±
(0.05%Rdg+0.01%FS)
6.0000k
Ω
100μA
100m
Ω
600mV
±
(0.05%Rdg+0.01%FS)
Operating Instructions
Digital Microhmmeter Type DO7 PLUS
6
