Current Measurement; Technical Specifications - Forch F73 Bedienungsanleitung

To measure temperature:
1. Set the rotary switch to TEMP position.
2. Connect 'K' type thermocouples to terminals.make sure the red and balck leads to
the TEMP and COM terminals respectively
3. Touch the object with the thermocouple probe for measurement.
4. Read the stable reading from LCD.

3.2.9 Current measurement

To avoid damage to the Meter or injury if the fuse blows, never attempt an in-circuit
current measurement where the open-circuit potential to earth is greater than 250V.
To avoid damage to the meter, check the meter's fuse before proceeding. Use the
proper terminals, function, and range for your measurement. Never place the test
leads in parallel with a circuit or component when the leads are plugged into the
current terminals.
Current is the flow of electrons through a conductor. The Meter's DC current ranges are
400.0 μA, 4000 μA 40.00 mA, 400.0 mA, 4.000 A and 10.00 A;AC current ranges are
400.0 μA, 4000 μA ,40.00 mA, 400.0 mA, 4.000 A and 10.00 A.
To measure current:
1. Turn off the power of the measured circuit. Discharge all the high voltage capacitors.
2. Set the rotary switch to the proper position.
3. Connect the black test lead to the COM terminal and the red test leads to the mA
terminal for a maximum of 400mA. For a maximum of 10A, move the red test lead to
the 10A terminal.
4. Break the circuit path to be tested.
Connect the black test leads to the more negative side of the break; connect the red test
leads to the more positive side of the break. (Reversing the leads will give a negative
reading, but will not damage the Meter.)
5. Turn on the power of the measured circuit, and then read the display. Be sure to note
the measurement units at the right side of the display (mA or A). When only the figure
"OL" displayed, it indicates overrange situation and the higher range has to be selected.
6. Turn off the power of the measured circuit and discharge all the high voltage capacitors
Remove the test leads and recover the measured circuit.

4 TECHNICAL SPECIFICATIONS

4.1 GENERAL SPECIFICATIONS
Environment conditions: 1000V CAT. III and 600V CAT. IV
Pollution degree: 2
Altitude < 2000m
Operating temperature: 0~40 °C, 32 °C ~122 °F (<80% RH, <10 °C noncondensing)
Storage temperature: -10~60 °C , 14 °F ~140 °F (<70% RH, battery removed)
Temperature Coefficient: 0.1 x (specified accuracy) / °C (<18 °C or >28 °C )
MAX. Voltage between terminals and earth ground: 750V AC rms or 1000V DC.
Fuse Protection: m A: fuse (FF400mA/1000V)
A:fuse (FF10A/1000V)
Sample Rate: 3 times/sec for digital data and 30 times/sec for the analog bar
Display: 4000 counts with analog bar LCD display. Automatic indication of functions and
symbols.
Over Range indication: LCD will display "OL".