PC-505B Manual, Rev. 201013
Warner
Instruments
A Harvard Apparatus Company
22
4.
Verify that scope reads 10 times the panel
METER
reading (2 div at these settings).
5.
Using
JUNCTION ZERO
control adjust
METER
to
0 mV
.
6.
Set the
METER SELECT
switch to the
Vc
position. Verify that
METER
reads
zero
.
7.
Set
VOLTAGE COMMAND
toggle to
positive (+)
.
8.
Adjust
VOLTAGE HOLD
control
fully CW
.
9.
Verify the
METER
reads a minimum of
200 mV
.
10.
Set oscilloscope to 1 V/div. Verify that scope reads 10x the meter reading. (e.g. 2 V for
a meter reading of 200 mV).
11.
Switch
VOLTAGE HOLD
toggle to
minus (
–
)
. Redo steps 9 and 10.
12.
Switch
VOLTAGE HOLD
toggle to
positive (+)
.
13.
Using
VOLTAGE HOLD
control, adjust until meter reads
150 mV
.
14.
Switch
METER SELECT
to
Junction Zero
.
15.
Adjust
JUNCTION ZERO
until
METER
reads
+100 mV
.
16.
Set
METER SELECT
to
V
c
+h
IN
. Verify that
METER
reads holding potential of
150 mV
.
17.
Set
METER SELECT
to
V
c
.
Verify that
meter
reads sum of holding potential and junction
offset (
250 mV
).
18.
Set
METER SELECT
control to
V
c
+h
IN
. Verify that the adjustment of
JUNCTION ZERO
control
does not affect the meter reading.
19.
Set the
VOLTAGE HOLD
toggle to
off
.
20.
Set the
METER SELECTOR
switch to
Junction Zero
and adjust the
METER
to
zero
.
21.
Return amplifier to initial settings.
External DC Voltage command checkout
1.
Apply a +1 VDC signal to
COMMAND IN
BNC on instrument rear panel.
2.
Connect oscilloscope to V
c
x10 output BNC on instrument front panel.
3.
Set the
METER SELECT
switch to
Vc
.
4.
Set
COMMAND SELECT
(
COMMANDS
block)
to
external command
.
5.
Set
COMMAND SENSITIVITY
to
x0.1
.
6.
Turn
COMMAND SENSITIVITY
toggle to
on
.
7.
Set oscilloscope to 0.5 V/div.
8.
Verify that
METER
reads
100 ± 1 mV
and that oscilloscope reads 1 V (2 div at these
settings).
9.
Set
COMMAND SENSITIVITY
toggle to
x0.01
.
10.
Set oscilloscope to 50 mV/div.
11.
Verify that
METER
reads
10 mV
and that oscilloscope reads 100 mV (2 div at these
settings).
12.
Set
COMMAND SENSITIVITY
toggle to
x0.001
.
