5
DIODE TEST (
)
SIGNAL INJECTOR (
)
CAUTION
CALIBRATION PROCEDURE
1. Connect the Red lead to the “V mA” socket and the Black lead to the “COM” socket.
2. Set the FUNCTION RANGE switch to the
diode (2000 position.
3. Connect the Red lead to the anode of the diode and the black lead to the cathode.
4. Read the forward voltage drop in mV on the LCD Display. If the polarity is reversed, "1"
will be displayed.
1. Connect the Red lead to the “V
mA” socket and the Black lead to the “COM”
socket.
2. Set the FUNCTION RANGE switch to the (square wave) position.
3. A test signal (30-40Hz) will appear between the “V
mA” and “COM” sockets with a
certain DC component. An additional coupling capacitor should be used.
BEFORE ATTEMPTING BATTERY REPLACEMENT, DISCONNECT THE TEST LEADS
FROM ANY ENERGISED CIRCUITS TO AVOID SHOCK HAZARD.
In all cases first remove meter from its protective holster.
Fuses rarely need replacement and always blow as a result of operator error. To replace the
fuse, remove the 2 back cover fixing screws, carefully remove the back cover and replace
the blown fuse with one with the same rating, replace the back cover and fixing screws.
To replace the battery, remove the battery door screw and battery door, replace with a new
battery of the same type and refit the battery door and retaining screw.
Recalibration should not be necessary for long intervals in any event. Calibration must be
carried out with a highly accurate voltage standard (better than 0.1% accuracy).
1. Remove the 2 back cover fixing screws. Carefully remove the back cover.
2. With the instrument operating and set to the 200mV DC range, apply 190mV DC from
an accurate source.
3. With a small screwdriver inserted into the semi-fixed resistor (SVR-1), carefully turn it
until the reading reads 190.0mV.
4. Refit the back cover and retaining screws.
Replace multimeter into protective holster when calibration or battery/fuse replacement is
complete.
Ω
Ω)
Ω
Ω
FUSE AND BATTERY REPLACEMENTS
