Ac Current Measurement (Fig. 2); Ac & Dc Voltage Measurement (Ac40B) (Fig. 3); Resistance & Continuity Measurement (Ac40B) (Fig. 4); Display Hold - Amprobe AD40B User Manaul

AC Current Measurement (Fig. 2)

1. Set the slide switch to ACB position.
2. Open spring-loaded clamp by pressing lever on left side of meter.
3. Position clamp around wire or conductor and release clamp lever.
Make sure that the conductor is centered in the clamp and that the
clamp is entirely closed. The clamp must be positioned around only
one conductor. If it is placed around two or more current carrying
conductors, the reading is FALSE.
4. Read the measured value on the display. If the measured value
exceeds the highest range for a period of time, overheating may occur.
Interrupt measurement.
Do not measure current on high-voltage conductors
(>600 V) in order to avoid risk of discharge and/or
incorrect reading.
AC & DC Voltage Measurement (AC40B) (Fig. 3)
1. Connect the black test lead to the COM input and the red test lead to
the "+" input.
2. Set the selector switch to V C position.
3. Press the AC DC button to select AC or DC voltage (B or F is
displayed).
4. Connect probe tips to circuit, in parallel to the load.
5. Read the measured value on the display.
Resistance & Continuity Measurement (AC40B) (Fig. 4)
1. Remove any voltage from resistance to be measured and discharge all
capacitors.
2. Connect the black test lead to the COM input and the red test lead to
the "+" input.
3. Set the selector switch to Ω R position.
4. Connect the probe tips across the circuit or resistance.
5. Read the measured value on the display.
The instrument emits a continuous tone and the R symbol is displayed
when the measured resistance is < 40 Ω.

Display Hold

Press the HOLD button to keep the measured value on the display for later
viewing. Press HOLD again to release the "Display Hold" function before
taking a new measurement. Display Hold can be applied to all measuring
functions.

Specifications

General Specifications
Display: (AC40B & AD40B) 3-3/4 digit LCD (max. reading 3999).
Polarity Indication: Automatic, negative indicated, positive implied
Overrange Indication : "OL" indicated.
Measuring Principle: Dual slope integration.
Range Selection: Automatic.
Low Battery Indication: N when battery voltage falls below operating
voltage.
Note
3