XI ’

’

’ A

A N

N VAW

VAW

VAW WY

WY Series

Series

ELECTRONICS

ELECTRONICS CO.,

CO.,

CO., LTD

LTD

LTD Variable

Variable

Variable High

High

High Voltage

Voltage

Voltage Supplies

Supplies

第

页

WY25

WY25 Tube-based

Tube-based

Tube-based Type

Type

Type 1mA

1mA

1mA Micro-Power

Micro-Power

Micro-Power Consumption

Consumption

Consumption High

High

High Voltage

Voltage

Voltage Power

Power

Module

Description:

WY25 is a kind of tube-based type high voltage module with its in-built voltage divider designed as a high linear DC

micro-power consumption voltage divider. O n each dynode there is a 1 μ F storage

capacitor, thus the adoption of this voltage divider provides photomultiplier with high

DC output linearity with fast response speed, wide range of output voltage and low

ripple. T his tube-based module simple for use can normally work only by inserting it on

a photoelectric tube and providing +5V output and a 50K potentiometer (or voltage

adjustment 0~+5V ) and its working current is less than 1MA. S o it is very suitable for

battery powered supply system. T his module supports photoelectric tube produced by

Hamamatsu Photonics with diameter of 25mm and tube base is as shown in the figure.

O ther types of photoelectric tubes are also acceptable.

1. Pinout

Pinout

Red: +5 input Black: Input power ground Green: Output voltage control end Shielded line: Signal output (7 pins)

2. Technical

Technical

Technical parameters

parameters

1. Input voltage: +4.5V ∼ +7V

2. I nput current: less than 1mA@- 1000V （ +5V IN ）

3. O utput voltage: 0V ～ -1500V

4. O utput ripple: 100mVp-p, typical 50mVp-p

5. L oad regulation: 0.01(50% load fluctuation )

6. L inear regulation: 0.01%(10% linear fluctuation )

7. Working temperature: -25 ℃ ～ +85 ℃

8. S torage temperature: -40 ℃ ～ +105 ℃

emperature stability: less than ± 30PPM/0 C , typical 20PPM/0 C

10. S hock resistance: 3G, 0~300Hz

11. S ize: Φ ： 29.0MM * L ： 38.0MM

3. Notes

Notes

Notes for

for

for use

use

（ 1 ） F or being designed with unique micro-power consumption voltage divider, this module only provides negative high

voltage for photomultiplier . F or this reason, much attention should be paid to the use of photomultiplier.

（ 2 ） A fter high voltage module normally works, the interior voltage will reach the set value within 0.1s once control end

changes. I f power fails suddenly, the interior high voltage will take about five minutes to return to

0V.

As the storage

capacitor between interior dynodes is up to 1 μ

, it will be very dangerous if it receives high voltage.

（ 3 ） A fter being inserted into photoelectric tube, the DC load of this micro-power consumption module is less than 1 μ F and

AC load up to 1A. After photoelectric tube normally works, its signal is alternating-current pulse , so it needs AC load

capacity. T he linearity of this module does not change with the increase of pulse and remains high linearity. O n the

premise that linearity does not change, the measured strength will reach the designed limit of photoelectric tube.

（ 4 ） T his module inserted into photoelectric tube enables it to have a good working state by only providing a load current

less than 1uA, but if the high voltage is directly provided without photoelectric tube, the DC load capacity will reach

1mA. T herefore, exterior short circuit or spark occur, its transit discharge capacity will be very strong.

（ 5 ） A fter this module

’

s output high voltage remains constant at control end, it does not changes with the variation of load

and input voltage. B ut as its signal pulse current and DC load are less after it works normally, the load introduced by

XI ’

’

’ A

A N

N VAW

VAW

VAW WY

WY Series

Series

ELECTRONICS

ELECTRONICS CO.,

CO.,

CO., LTD

LTD

LTD Variable

Variable

Variable High

High

High Voltage

Voltage

Voltage Supplies

Supplies

第

页

measuring system is higher than working load in measuring high voltage. D uring measurement , 5V input current is

higher than the actual working current and this depends on the measuring load introduced. T he real input current value

should be the value after removing high voltage measuring probe and the high voltage value is the value during

measurement, but load only includes working load and +5V input current at the time is the real working current. F or

example, use a high voltage probe with its input resistance of 500M to measure high voltage, it reads +5V input 2mA

and high voltage output -1000V. After removing probe, it reads +5V input 0.8mA. the high voltage measuring probe is

introduced with a 1.2mA input current, which is higher than its normal working current 0.8mA.