Spellman MXP10PN15 User manual

Installation and User Guide

MXP10PN15, 10kV Reversible Dynode and

-2.3kV Electron Multiplier Power Supply

Document Number: 80900-4

APPROVAL

Issue

Date

19/01/2021

Issuing Authority

I-7654

Engineering Approval

Sales/Marketing Approval

Tel : +44 (0)1798 877000

Fax : +44 (0)1798 872479

e-mail : hvsales@spellmanhv.co.uk

Broomers Park, Broomers Hill Lane

Pulborough, W. Sussex, RH20 2RY

Spellman High Voltage Electronics Limited - Company Confidential

This document must not be copied or distributed without express permission from Spellman High Voltage Electronics Limited

Page 2 of 8

CHANGE HISTORY

Section

Reason for Change

Issue

All

Initial –based on 80900-1

CONTENTS

1. Unit Description .................................................................................................. 4

1.1. Ratings .............................................................................................................. 4

1.2. Environmental conditions................................................................................... 4

2. Safety................................................................................................................... 4

2.1. Meaning of Symbols.......................................................................................... 4

2.2. Grounding.......................................................................................................... 4

3. Installing the Unit................................................................................................ 5

3.1. Electrical Installation.......................................................................................... 5

3.2. Connections....................................................................................................... 5

3.3. Mechanical Installation ...................................................................................... 6

4. Operating the unit............................................................................................... 7

4.1. Control Inputs .................................................................................................... 7

4.2. Monitor Outputs................................................................................................. 7

4.3. LED Indicators................................................................................................... 7

Annex A - Mechanical Layout................................................................................... 8

Spellman High Voltage Electronics Limited - Company Confidential

This document must not be copied or distributed without express permission from Spellman High Voltage Electronics Limited

Page 3 of 8

DANGER

HIGH VOLTAGE

RISK OF ELECTROCUTION

•Observe extreme caution when working with this equipment.

•High voltage power supplies must always be grounded.

•Do not touch connections unless equipment is turned off and

the capacitance of both the load and power supply are

grounded.

•Allow adequate time for discharge of internal capacitance of the

power supply.

•Do not ground yourself or work under wet or damp conditions.

Servicing Safety

•This unit is not user serviceable. Return to supplier for repair or

service.

Spellman High Voltage Electronics Limited - Company Confidential

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Page 4 of 8

1. Unit Description

The MXP10PN15 (MX10Plus) units are 10kV reversible high voltage power supplies with an

integrated -2.3kV Electron Multiplier (EM) supply. They are intended for use in mass

spectrometry applications, they are particularly suited for dynode detector applications.

Logic signal inputs are used to control the HV outputs, the EM being programmable. The unit

provides voltage monitor read-backs for both.

The units are designed for bulkhead mounting and are encapsulated to provide protection

against shock, vibration, and the possible ingress of moisture.

1.1. Ratings

Input: 15Vdc ± 0.75 volt, 500mA (1A reversing)

10kV Output: ± 10kV, 10µA

EM Output: -2.3kV, 230µA (max)

1.2. Environmental conditions

Temperature: 5C to 45C

Humidity: 10% to 90% RH (non-condensing)

2. Safety

The conditions of this manual must be complied with to maintain safety; operating the unit

in a manner not defined in this manual may compromise the protection from electric shock.

2.1. Meaning of Symbols

This symbol on the unit means “read the manual before powering the

equipment”.

This symbol on the unit means “Caution; risk of electric shock”.

2.2. Grounding

The unit is contained in an earthed case. The case of the unit shall be properly bonded to

the main protective earth termination in the end product.

Spellman High Voltage Electronics Limited - Company Confidential

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Page 5 of 8

3. Installing the Unit

3.1. Electrical Installation

The unit is designed for indoor use and is to be supplied from a double insulated, UL

recognised, 15V dc supply.

a) The unit must be properly bonded to the main protective earthing termination in the

end product.

b) Adding a capacitive load will increase the stored charge and energy, possibly making

the output voltage hazardous.

c) The front top of the case acts as a heatsink for the power electronic components and

can exceed 60º C.

d) Consideration should be given to the conduct of the following tests with the power

supply installed in the end product:

i) Dielectric voltage withstand test, between live parts of the power supply and

the end product chassis.

ii) Permissible limit tests with the power supply installed in the end product.

iii) Temperatures on power electronic devices and accessible surfaces.

e) The input and output connections are not suitable as field connections and are only

intended for connection to internal wiring inside the end product.

3.2. Connections

3.2.1. Control and Power Input Connector

The input connector is a RoHS compliant flat ribbon cable connector, 20 pin, polarity

keyed, 3M Part Number N3428-6002RB or similar. The pin numbers are shown in the

table below along with a brief description of each signal.

Signal

Type

+15Vdc input

Power Input

+15Vdc input

Power Input

N/C

Not used

N/C

Not used

Ground

EM Voltage program Control

Vdc Input

Signal reference ground

Ground

10kV on

TTL Output

10kV on

TTL Output

10kV Polarity Control

TTL input

EM Protect

TTL input

±2.3 kV Output Monitor

Analog voltage read back

EM On

TTL Output

Ground

±10 kV Output Monitor

Analog voltage read back

N/C

Not used

+15Vdc input

Power Input

+15Vdc input

Power Input

Spellman High Voltage Electronics Limited - Company Confidential

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Page 6 of 8

3.2.2. HV Output Connectors

HV output +/- 10kV:

Modified ALDEN A200QX24, 20kV Right Angle Receptacle on a 7” +/-0.25” long flying

lead using QX wire (30KV Judd Wire JW1134-06 22AWG TOC RoHS). The connector

is modified by removing 5.3mm (0.21”) of material from the open end of the connector.

EM output -2.3kV:

MHV bulkhead receptacle Kings p/n KV-79-15 or similar.

3.3. Mechanical Installation

The unit shall be fixed in place in the final system with screws on the hold down points

provided. Note that the thread depth of the mounting inserts is 5.3mm (0.21”).

Unit weight: 1.8kg

Mechanical Dimensions - see drawing in Appendix A

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Page 7 of 8

4. Operating the unit

The unit is controlled and monitored by the signals defined below.

4.1. Control Inputs

4.1.1. 10kV Polarity control: TTL Low (< 0.5V) = Negative polarity.

TTL High (> 2.0V) = Positive polarity.

4.1.2. 10kV On Control Signal: TTL Low (< 0.5V) = Output On.

TTL High (> 2.0V) = Output Off.

4.1.3. EM Voltage program: 0V to -9.2V analog input for 0V to -2.3kV output.

Output voltage follows input voltage with a scale

factor of 250. Input impedance 50k ohms.

4.1.4. EM On Control: TTL low (< 0.5V) = Output On.

TTL high (> 2.0V) = Output Off.

4.1.5. EM Protect Control: TTL low (< 0.5V) = Enables EM Output.

TTL high (> 2.0V) = Disables EM Output.

4.2. Monitor Outputs

4.2.1. 10kV Voltage Monitor: Buffered 3.3V analog output for 10kV output.

Actual output voltage scaled by 3000. Proof

against connection to –15V. Output impedance

11k ohms. Designed for nominal output of 3V

when connected to 100k ohms 1% measuring

circuit. Limits 3V 3% (2.91V to 3.09V).

4.2.2. EM Voltage Monitor: Buffered 0V to -7.12V analog output for 0V to –2.3kV output.

Actual output voltage scaled by 323. Accuracy 5%. Rise

and fall times to be < 15mSec (10% to 90%). Ripple 10mV

pk-pk max. Output impedance 10k ohms.

4.3. LED Indicators

4.3.1. 10kV Polarity On/Off: Two yellow LED’s indicate –DYN, +DYN or OFF.

Labelled with –DYN and +DYN.

4.3.2. EM On/Off: A yellow LED indicates ON or OFF, labelled EM On.

Spellman High Voltage Electronics Limited - Company Confidential

This document must not be copied or distributed without express permission from Spellman High Voltage Electronics Limited

Page 8 of 8

Annex A - Mechanical Layout

12.7

165.0

22.3 92.1

50.8

134.6

203.0

115.57

8.63

8.33

2 x mounting inserts

#4-40 x .21 inch minimum

thread depth

70167 issue C

Pin 1

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