MODEL HCM-300
CAPACITANCE
MANOMETER
POWER SUPPLY
Contains Operating and Programming Information
MODEL HCM-300
CAPACITANCE
MANOMETER
POWER SUPPLY
ã 1996,Teledyne Brown Engineering,
Hastings Instruments Division
All rights reserved.
Hampton,Virginia, U.S.A.
First Printing November, 1996
Document Number: 145-0197 Rev. B
Manual Print History
The print history shown below lists the printing dates of all revisions and addenda created for
this manual.The revision level letter increases alphabetically as the manual undergoes subse-
quent updates. Addenda, which are released between revisions, contain important change
information that the user should incorporate immediately into the manual. Addenda are
numbered sequentially.When a new revision is created, all addenda associated with the
previous revision of the manual are incorporated into the new revision of the manual. Each
new revision includes a revised copy of this print history page.
Revision A (Document Number 145-1096).................................................... November 1996
Revision B (Document Number 145-0197)........................................................ January 1997
Warranty
Hastings Instruments warrants this product, for a period of one year from the date of ship-
ment, to be free from defects in material and workmanship.This warranty does not apply to
defects or failures resulting from unauthorized modification, misuse or mishandling of the
product.This warranty does not apply to batteries or other expendable parts, nor to damage
caused by leaking batteries or any similar occurrence.
This warranty is in lieu of all other warranties, expressed or implied, including any implied
warranty as to fitness for a particular use. Hastings Instruments shall not be liable for any
indirect or consequential damages.
Hastings Instruments will, at its option, repair, replace, or refund the selling price of the
product if Hastings Instruments determines in good faith, that it is defective in materials or
workmanship during the warranty period. Defective instruments should be returned to
Hastings Instruments together with a written statement of the problem and a repair authoriza-
tion number.
Table of Contents
1
General Information ................................................................ 1-2
Introduction .............................................................................................. 1-2
Specifications............................................................................................. 1-2
Ordering Information ............................................................................... 1-2
2
3
Installation ...............................................................................2-2
Receiving Inspection .................................................................................2-2
Mounting...................................................................................................2-2
Cable Connections ....................................................................................2-4
Operating Information.............................................................3-2
Normal Start-up ........................................................................................3-2
Analog Output ..........................................................................................3-2
Internal Adjustments ................................................................................3-3
Display Configuration ...............................................................................3-4
4
Warranty and Repair................................................................4-2
SECTION 1
General Information
1-2
General Information
Introduction
The Hastings Capacitance Manometer Power Supply (HCM-300) supplies stable
±15VDC specifically for operating the Hastings Capacitance ManometerTrans-
ducer.The transducer returns a signal to the HCM-300 which displays an accurate
pressure reading.
Specifications
Output Voltage ......................................................................................... ±15 VDC ± 2.5 %
Power Input................................................................................. 115 VAC ±10%, 50/60 Hz
SignalInput ......................................................................................................... 0 - 10 VDC
Display ....................................................................................................................... 4½digit
Analog Output Voltage......................................................................................... 0 - 10 VDC
Min. Load Impedance .................................................................................................. 10 kW
Display Type .................................................................................. 0.52” (13.2mm) red LEDs
Warm up Time .............................................................................................................. 15min
Operating Temperature ..............................................................................................0 - 500C
Load Regulation ....................................................................................±1% (10 mA-30 mA)
Accuracy................................................................................................................ ±3 counts
Ordering Information
Ordering options for the HCM-300 series power supply:
HCM-300-XX-XX
Cable length
-10 (10’ cable)
-99 (custom length, customer specified)
Display Configuration
-11 (10.000Torr)
-12 (100.00Torr)
-13 (1000.0Torr)
SECTION 2
Installation
2-2
Installation
Receiving Inspection
Carefully unpack the HCM-300. Inspect all items received at this time for any
obvious damage that may have occurred during shipment. Immediately advise the
shipping agent if there is any damage to items in your shipment. Identify each item
and the quantity received with those listed on the packing list.
Mounting
Cut out panel as shown in the diagram below.
Installation
2-3
To panel mount the HCM-300:
1) Slide power supply into panel from the front.
2) Attach brackets to the side of the power supply.
3) Tighten screws against panel.
See Figure below:
2-4
Installation
Hastings Capacitance Manometer Power Supply
Cable Connections
The HCM-300 is supplied with a power cable.The 3-wire cable plugs into the
back of the instrument in the socket marked “AC Power”.
A 5-wire cable connects the instrument to the transducer.The diagram below
shows the proper connections.
AC POWER
ANALOG OUT
SECTION 3
Operating Information
3-2
Operating Information
Normal Start-up
1) Connect the interface cable from the HCM-300 to the transducer.
(See figure on page 2-4 of this manual)
2) Verify that the AC power to be applied to the HCM-300 is correct (115VAC).
3) Apply AC power to the HCM-300.
4) The HCM transducer has a local zero adjustment. Follow the zero
adjustment procedure described in the HCM-6000 series manual.
Caution
Before applying power to the instrument, ensure that the line voltage being
applied is correct. Failure to do so may result in damage to the instrument
which is not covered by the warranty.
Analog Output
The HCM-300 generates an analog signal which is directly proportional to the
displayed pressure.The analog output signal is given by:
(1)
The output signal is a DC voltage with a full scale reading for a given capacitance
manometer transducer corresponding to +10VDC. For example, if one has a 100
Torr HCM transducer with a displayed pressure of 35Torr, then the output volt-
age will be:
(2)
The uncertainty associated with the analog output voltage is given by:
(3)
Operating Information
3-3
Conversely, if the analog output voltage is measured, then the pressure reading is
given by:
(4)
Internal Adjustments
The internal adjustments are factory set and should never need to be changed.
However, if the need arises and suitable standards are available the following
adjustments can be made. (see figure on page 3-4)
Full Scale
The full scale potentiometer changes the display by changing the sensitivity of the
instrument. Apply a calibrated +10VDC signal to the Sig Hi and Sig Lo pins on
the back of the power supply.The display of the instrument should read “1000.0”,
“100.00” or “10.000”depending upon the configuration. Adjust the full scale
potentiometer (R11) if needed.
Analog Output
The analog output potentiometer changes the analog output voltage by changing
the gain on the output buffer amplifier. Apply a calibrated pressure standard to the
transducer and refer to equation (1). Adjust the potentiometer (R18) as needed.
Notes on internal adjustments:
*
Both the full scale reading and the analog output voltage can
change by only ± 10%.
**
Zero adjustment can only be performed on the transducer itself. See the
HCM-6000 series transducer manual Section 3.
3-4
Operating Information
Display Configuration
The jumper position on the power supply circuit board determines the location of
the decimal on the display.The jumper is factory set to match the configuration
specified by the customer. Should the need arise to change the display configura-
tion, this jumper can be easily moved (see figure below).
configuration jumpers
Jumper Location
Display Configuration
1000.0 Torr
1
4
3
2
not used
10.000 Torr
100.00 Torr
SECTION 4
Warranty and Repair
4-2
Maintainance and Repair
Warranty Repair
Hastings Instruments will repair or replace, at their option, any product covered
under the warranty expressed in the front of this manual, that is returned transpor-
tation prepaid to their plant in Hampton,Virginia. All products returned must be
accompanied by a Return Materials Authorization (RMA) form or a written
description of the problem with the instrument. Please consult the factory for your
RMA number before returning any product for repair.
Non-Warranty Repair
Any product returned for a non-warranty repair must be accompanied by a pur-
chase order authorizing repair up to 1/3 the list cost of a new product and the
RMA form or a written description of the problem with the instrument. If the
repair cost is higher, you will be contacted for authorization before we proceed
with any repairs. If you then choose not to have the product repaired, a minimum
will be charged to cover the processing and inspection. Please consult the factory
for your RMA number before returning any product for repair.
Teledyne Brown Engineering
Hastings Instruments
804 Newcombe Avenue
HamptonVirginia, 23669 U.S.A.
Attn: Repair Department
Telephone
FAX
757-723-6531
800-950-2468
757-723-3925
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