levels 0.0000 V to 1.9999 V. The 2.0 V range
also allows 50 mV signal source (item #15)
checks to see that the AMPTEC 601ES DMM
measures and displays approx. 0.0500 volts rms.
The 50mV signal source is barely measurable
on the 20V and higher ranges.
To measure AC or DC current (Stray Current
Test) connect input and out put wires from the
UUT to the far left lead wires across to the
V /V
connection inputs. Connect to the
“UUT”.
push button. The AMPTEC 601ES Safety
DMM will measure current from 0.1 mA to
1.9999 AC/DC current. A 5 amp fuse protects
the meter from current greater than 5 amperes;
see item #5 for fuse detail.
This passive analog DC
milliammeter can be used to independently
verify AMPTEC 601ES DMM output current
levels
. The scale
is 0 - 10 mA fullscale. A resistance range on the
AMPTEC 601ES DMM must first be selected
(Ohms mode). Pressing the milliammeter
switch routes the AMPTEC 601ES DMM ohms
source current output to the analog
milliammeter. On the 2.0 or 20 ohm ranges the
AMPTEC 601ES DMM user should observe a
milliammeter needle reading of approx. 5 mA
coming from the unit’s ohms source.
HI
LO
Depress and Hold the
(often used
before measuring the resistance of an explo-
sive element).
from the unit’s ohms source
Stray Current
13. Analog DC milliammeter -
12. Stray Current - Press To Measure.
14. Resistance Ranges
15. Signal Source -
16. Flip Latch
- The AMPTEC 601ES
DMM resistance ranges go in continuous
decades from 2.0 Ohms to 20 Kilo Ohms. The
selection of the (2.0 Ohm) lowest resistance
range is accomplished by rotating the range
knob. Align indicator mark on knob with the
desired resistance range of function to the
1 O’clock position. By continuing to rotate the
Function/Range select knob in a clockwise
direction, the operator selects the next higher
range (i.e. from 2.0 Ohm to 20.0 K Ohm range
etc.).
This function allows the
user to verify voltage measurement (i.e. the 2.0
V range) and the stray current measurement is
working properly. The AMPTEC 601ES DMM
can give out a signal source of 50 mV or 5mA.
To verify voltage; set the range switch (item
#11) to the 2.0 volt range. Depress signal
source push button, the LCD display should
indicate approx. 0.0500 Volts.
To verify the Stray Current function; set the
range switch to the 2 AMP range (item #12).
Depress the signal source push button, and
press/hold the Stray Current
measure button. The display should indicate
approx. 0.0050 Amperes.
- When the AMPTEC 601ES
DMM case is closed, press down (place palm on
the lid corner, in order to compress the
o-ring) while flipping up the latch (see item
#16) to open up the 601ES DMM. The Purge
Valve (item #2) should open if there has been an
atmospheric pressure change.
simultaneously
2.0 KOHM
20 OHM
200 OHM
2.0 OHM
20 KOHM
FUNCTION / RANGE
2 AMP
AC/DC
600VRMS
200V
AC/DC
20V
AC/DC
2.0V
AC/DC
2 AMP
AC/DC
STRAY CURRENT
PRESS TO MEASURE
MILLAMPERES
milliammeter
0 - 10 mA DC
PRESS TO MEASURE
+ HIGH
LOW
V
V
LO
V
HI
I
50mV - 5mA
SIGNAL
SOURCE
press/hold
Sect. D - Operation, Functional Self-Test and Use
13
