PS1803N0 pages

photomultiplier power base (negative)
PS1803N data sheet
1

description

The PS1803N is a compact photomultiplier power base,
operating at negative high voltage. The CW principle of
operation provides the lowest power consumption within our
range of power bases. This is particularly relevant to battery
operated equipment. It is suitable for use with 10 stage, 52
mm diameter, photomultipliers with an overall voltage range of
–300 to –1800 V. It is available in two versions: the
PS1803N/5 operates from a nominal +5V supply and the
PS1803N/12 requires a nominal +12V.
It is housed in a cylindrical metal enclosure to provide
electrical screening. Low voltage connections are by 500 mm
long insulated leads, and the anode output is via a 500 mm
long RG174U screened coaxial cable.
The overall operating voltage for the photomultiplier can be
precisely set using any one of the three programming options
shown in section 9.

The PS1803N is suitable for the following applications:
pulsed light
photon counting
analogue
battery powered instruments

3

examples of Sens-Tech power bases

applications

ratings

5

input voltage (PS1803N/5)
input voltage (PS1803N/12)
control voltage
temperature (operating)
reference out load

+4.75 V to +8 V
+ 11 v to +15 v
0 to +1.8V
+5 ºC to +55ºC
1 mA

features
extremely low power consumption

6

schematic diagram
electrode
B14B contact

compact design
freedom from high voltage cables
low ripple
exceptional voltage divider stability with varying anode
current
excellent pulse height linearity
sleep mode
reverse supply protected

4

Imon (option)
HVmon

brown
orange
red

19
2
3
4
5
6
7
8
9
10
11

supply

ref.

blue

CW chain

2

HV

yellow

ref

black
white

control

k
d1
d2
d3
d4
d5
d6
d7
d8
d9
d10

specifications
-300 V to –1800 V
200µA
<36 mA
<15 mA
<26 mA
≤ 11 mA
0.017% (0-100%)
0.001 % V-1
5 ppm ºC-1
<1s
< 15 s
4 mV pp
0.3 mV p-p (nulled)
external voltage control
0.3 mV to 1.8 V (-300 to -1800V)
reference volts out (blue wire)
2.5V±0.4%
weight
80 g
output voltage range
anode current at 1800 V
input current, full load (PS1803N/5)
input current, full load (PS1803N/12)
input current, idling (PS1803N/5)
input current, idling (PS1803N/12)
load regulation (typical)
line regulation (typical)
temperature coefficient
warm up time to 0.3 % of final output
discharge time to <40 V with no load
anode ripple with 10 kΩ/20 pF load

10MΩ (option)

RG174U

12 a

example of output voltage with 1.3 volts applied to
control (white wire)
contact electrode
2
3
4
5
6
7

d1
d2
d3
d4
d5
d6

voltage
-1000
-900
-800
-700
-600
-500

contact electrode
8
9
10
11
12
19

d7
d8
d9
d10
a
k

voltage
-400
-300
-200
-100
0
-1300