12391 NIST CAL CERT Simpson, 12391 NIST CAL CERT Datasheet - Page 23

• Manufacturer Part Number: 12391 NIST CAL CERT
• Description: Analog Multimeters 260-8P VOM NIST CAL CERT W/O DATA
• Manufacturer: Simpson

Specifications of 12391 NIST CAL CERT

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

4.9.1
4.9.2
4.9
NOTE: The maximum voltage ratio that can be measured is +50 dB on the 0-250V
range.
e.
a.
b.
c.
d.
e.
f.
a.
b.
c.
d.
e.
NOTE: For polarity reversing see paragraph 4.2.
a.
b.
c.
If dB measurements are being made to a 0.006 watt into 500 ohm reference
level, subtract +7 dB from the reading obtained on the 260.
Direct Current Measurement
Do not change the range setting of
the range or function switches while
the circuit is energized.
Never disconnect test leads from the
circuit under measurement while it
is energized.
Always turn the power off and dis-
charge all the capacitors before the
setting of the switches is changed,
or the leads disconnected.
Never exceed the circuit-to-ground
voltage of the instrument (1000V
Max., Table 1-1, Item 16).
Always connect the instrument in se-
ries with the ground side of the cir-
cuit.
In all direct current measurements,
make certain the power to the circuit
being tested has been turned off be-
fore connecting and disconnecting
test leads or restoring circuit conti-
nuity.
Set the function switch at +DC.
Plug the black test lead into the -COMMON jack and the red test lead into the
+50µAMPS/250mV jack.
Set the range switch at 50µAMPS (dual position with 50V).
Open the ground side of the circuit in which the current is being measured.
Connect the VOM in series with the circuit. Connect the red test lead to the
positive side and the black test lead to the negative side.
Read the current on the black DC scale. Use the 0-50 figures to read directly
in microamperes.
Range
Set the function switch at +DC (Figure 4-12).
Plug the black test lead into the -COMMON jack and the red test lead into the
+ jack.
Set the range switch at one of the four range positions marked 1 mA, 10 mA,
100 mA or 500 mA
Direct Current Measurement 0-50µA Range
Direct Current Measurement 0-1mA Through 0-500mA
!
23
Figure 4-11. Jacks and Switch
Positions for Measuring Decibels
A.C. VOLTS
COMMON
ONLY
-
+
500 MA.
2.5 V.
10 V.
1V.
25 V.
50 A.
250 V.
500 V.
I000 V.
AMPS.
ALL TERMINALS 1 V MAX
260