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
A
B
C
Date
19/01/2021
Issuing Authority
I-7654
Engineering Approval
Sales/Marketing Approval
Tel : [phone]
Fax : [phone]
e-mail : [e-mail]
Broomers Park, Broomers Hill Lane
Pulborough, W. Sussex, RH20 2RY

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CHANGE HISTORY
Section
Reason for Change
Issue
All
Initial –based on 80900-1
A
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

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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.

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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.

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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.
Pin
Signal
Type
1
+15Vdc input
Power Input
2
+15Vdc input
Power Input
3
N/C
Not used
4
N/C
Not used
5
Ground
Ground
6
Ground
Ground
7
EM Voltage program Control
Vdc Input
8
Signal reference ground
Ground
9
10kV on
TTL Output
10
10kV on
TTL Output
11
10kV Polarity Control
TTL input
12
EM Protect
TTL input
13
±2.3 kV Output Monitor
Analog voltage read back
14
EM On
TTL Output
15
Ground
Ground
16
Ground
Ground
17
±10 kV Output Monitor
Analog voltage read back
18
N/C
Not used
19
+15Vdc input
Power Input
20
+15Vdc input
Power Input

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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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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.
.

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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
1
Pin 1