© Copyright 2017 General Technologies
4.4.3 Relative measurements
•
Pressing the “
REL
” button once enter the relative measurement
mode. In this mode the instrument offsets all the following
measurements with the value present at the time the relative mode
was entered.
•
The relative mode can be used conmbined with any other function,
including MAX, MIN, MAX-MIN and AVG readings of the RECORD
function.
•
Pressing the “
REL
” button again exits this function.
4.4.4 Trigger Level selection
•
When measuring Frequency, Dwell or Pulse Width, and the
readings are unstable or if there is not reading at all, it maybe be
necesary to change the trigger level.
•
To change the trigger level, press the “
RANGE
” button once to
display the selected level, and then press the “
RANGE
” button
within 1 second. Every time the button is pressed the trigger level
will change to the next value (1V, 2V, 20V and 200V).
4.4.5 Trigger Slope selection
•
The slope function is useful when performing
Dwell
and
Pulse
Width
(
Fuel Injector
) measurements. For example, if you are
measuring a signal with 10% duty cycle when the trigger is set
to
+
, the same waveform will show a duty cycle of 90% when the
trigger is set to
.
•
To Toggle between
T
and
,
press and hold the
+ Trigger
(
REL
)
for 1 second or more.
4.4.6 Hold Display Data
•
Pressing the “
HOLD
” button, will toggle the hold display funcion on
and off.
•
When the
HOLD
function is activated, the readout on the display
will be maintained or ‘freezed’ until the function is turned off by
pressing the “
HOLD
” button again.
4.4.7 Record Mode
•
Pressing the “
REC
” button for 1 second or more will activate the
RECORD
mode, and the
indicator will appear in the display.
•
When the
RECORD
function is activated, the instrument will beep
when a new maximum or minimum is detected.
•
To read the MAX, MIN, MAX-MIN and AVG, press the
REC
button to step through the recorded measurements.
•
Pressing the “
REC
” button again for 1 second or more will exit
the
RECORD
mode.
4.4.8 Auto Power Off
•
This function is included to extend the battery life when the
instrument is not in use.
•
The instrument will turn
OFF
automatically and sound a warning
beep, after approxiamtely 4 minutes of no activity (i.e. rotary
switch or buttons operations, or no signifi cant meter reading
changes), .
•
The instrument is turned automatically
ON
if the
FUNCTION
switch is operated.
4.4.9 External power lines noise fi ltering
•
When the
RECORD
function is activated, the instrument will turn
off the AUTO POWER OFF function, and the
indicator in the
display will not show.
•
To read the MAX, MIN, MAX-MIN and AVG, press the
REC
button to step through the recorded measurements.
•
Pressing the “
REC
” button again for 1 second or more will exit
the
RECORD
mode.
5. MAINTENANCE
CAUTION:
Before attempting battery removal or replacement,
disconnect test leads and remove the instrument from
any energized circuit to avoid shock hazard.
5.1 Battery Replacement
•
To replace the battery, remove the 3 screws of the back cover (back
of the case), and lift the end of the case nearest to the input sockets,
until it unsnaps from the case top. Remove the battery.
•
Replace with a new 9 V alkaline battery type NEDA 1604 or IEC6F22
observing the proper polarity from the diagram on the label inside
the battery compartment.
•
Reinstall the case cover, ensuring that all gaskets are properly
seated, and that the snaps on the case top (near the LCD Display)
are engaged. Replace and tighten the securing screws.
5.2 Fuse replacement
•
To replace the fuse, remove the 3 screws of the back cover (back of
the case), and lift the end of the case nearest to the input sockets,
until it unsnaps from the case top.
•
Replace new fuse only with the identical type and rating.
F2=10A
:
Type IEC60127-2 or UL248-14 (6.3x25.4mm)
fast acting fuse, rated at 10A/250V.
•
Reinstall the case cover, ensuring that all gaskets are properly
seated, and that the snaps on the case top (near the LCD Display)
are engaged. Replace and tighten the securing screws.
5.3 Cleaning And Storage
•
Periodically wipe the case with a soft damp cloth and mild house-
hold cleanser. Do not use abrasives or solvents. Ensure that no
water gets inside the instrument to prevent possible shorts and
damage.
•
If the instrument is not to be use for long periods of time ( 60 days or
more) to avoid damage due to battery leakage, remove the battery
from the instrument and store it separately.
6. WARRANTY
One year limited warranty, excluding batteries and fuses. For de-
tails see Standard Warranty Information in our webpage or request
a printed copy.
General Technologies Corp.
#121 - 7350 72nd Street Tel.: (604) 952-6699
Delta, BC V4G 1H9
Fax: (604) 952-6690
Canada www.gtc.ca
