Biospherical Instruments Inc QSP-170BD User manual

QSP-170BD

Two Channel Digital Readout System

and

Power Supply

User's Manual

Biospherical Instruments Inc.

5340 Riley Street

San Diego, CA 92110

(619) 686-1888

FAX (619) 686-1887

Version 003019UA.DOC

Date Printed: 04/18/00

QSP-170BD User’s Manual 003019UA.DOC

Biospherical Instruments Inc. ii

NOTICE

The information contained in this document is subject to change without notice.

BIOSPHERICAL INSTRUMENTS MAKES NO WARRANTY OF ANY KIND WITH REGARD TO

THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF

MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Biospherical

Instruments shall not be liable for errors contained herein or for incidental or consequential

damages in connection with the furnishing, performance, or use of this material.

This document contains proprietary information which is protected by copyright. All rights are

reserved. No part of this document may be photocopied, reproduced, or translated into another

language without the prior written consent of Biospherical Instruments Inc.

IBMâis a registered trademark of International Business Machines Corp.

IBM PC is a product of International Business Machines Corp.

MSDOS and Excel are products of Microsoft Corporation

Document 003019UA.DOC

First Edition November, 1994

QSP-170BD User’s Manual 003019UA.DOC

BIOSPHERICAL INSTRUMENTS INC. iii

LIMITED WARRANTY

BIOSPHERICAL INSTRUMENTS INC. warrants this QSP-170BD (the Product) to be in good

working order for a period of one (1) year parts and good for a period of ninety (90) days labor

from the date of purchase. Should this Product fail to be in good working order at any time

during the above stated warranty period, Biospherical Instruments Inc. will, at its option, repair

or replace this Product at no additional charge except as set forth below. Repair parts and

replacement Products will be furnished on an exchange basis and will be either reconditioned or

new. All replacement parts and Products become the property of Biospherical Instruments Inc.

This limited warranty does not include service to repair damage to the Product resulting from

accident, disaster, misuse, abuse or non-Biospherical Instruments Inc. modification of the

product.

Limited warranty service may be obtained by delivering the Product during the warranty period

to Biospherical Instruments Inc. at its San Diego, California, Service Center, showing proof of

purchase. If this Product is delivered by mail, you agree to insure the Product or assume risk of

loss or damage in transit; to prepay shipping charges to the San Diego, California, Service

Center; to use the original shipping container or equivalent; and to pay for return shipping

charges.

ALL EXPRESS AND IMPLIED WARRANTIES FOR THIS PRODUCT INCLUDING THE

WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE,

ARE LIMITED IN DURATION TO THE ABOVE WARRANTY PERIOD, AND NO

WARRANTIES, WHETHER EXPRESSED OR IMPLIED, WILL APPLY AFTER THIS PERIOD.

SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY

LASTS, SO THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU.

IF THIS PRODUCT IS NOT IN GOOD WORKING ORDER AS WARRANTED ABOVE, YOUR

SOLE REMEDY SHALL BE REPAIR OR REPLACEMENT AS PROVIDED ABOVE. IN NO

EVENT WILL BIOSPHERICAL INSTRUMENTS INC. BE LIABLE TO YOU FOR ANY

DAMAGES, INCLUDING ANY LOST PROFITS, LOST SAVINGS OR OTHER INCIDENTAL OR

CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE SUCH

PRODUCT, EVEN IF BIOSPHERICAL INSTRUMENTS INC. HAS BEEN ADVISED OF THE

POSSIBILITY OF SUCH DAMAGES. NOR WILL BIOSPHERICAL INSTRUMENTS INC. BE

LIABLE FOR ANY CLAIM BY ANY OTHER PARTY.

SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR

CONSEQUENTIAL DAMAGES FOR CONSUMER PRODUCTS, SO THE ABOVE

LIMITATIONS OR EXCLUSIONS MAY NOT APPLY TO YOU.

THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE

OTHER RIGHTS WHICH MAY VARY FROM STATE TO STATE.

QSP-170BD User’s Manual 003019UA.DOC

BIOSPHERICAL INSTRUMENTS INC.iv

TABLE OF CONTENTS

INITIAL INSPECTION, SHIPPING AND STORAGE .........................................v

PRECAUTIONS.................................................................................................v

1.0 INTRODUCTION ........................................................................................1

2.0 SPECIFICATIONS......................................................................................2

3.0 OPERATING INSTRUCTIONS ..................................................................3

3.1 OPERATING THE QSP-170BD.......................................................3

3.1.A. Switch Functions ..............................................................3

3.2.B. Rear Panel Inputs/Outputs ...............................................4

3.2 MAINTENANCE...............................................................................4

3.3 BATTERY SELECTION...................................................................5

APPENDIX: THEORY OF OPERATION AND TECHNICAL DRAWINGS........A-1

THEORY OF OPERATION.....................................................................A-1

TECHNICAL DRAWINGS.......................................................................A-1

QSP-170BD User’s Manual 003019UA.DOC

BIOSPHERICAL INSTRUMENTS INC.v

INITIAL INSPECTION, SHIPPING AND STORAGE

This QSP-170BD was carefully inspected mechanically and electrically, and was optically

calibrated before shipment. It should be free of mars or scratches and in perfect operating

condition upon receipt. To confirm this, the instrument should be inspected for physical

damage incurred in transit. If the instrument was damaged in transit, file a claim with the

carrier. Check the instrument for proper operation as outlined in the following sections. If there

is damage or deficiency, see the Warranty in the preface of this manual.

WARNING: Read Section 3.0 on Operation before attempting to operate or

disassemble the instrument.

Retain the original packing material for shipment to the factory. The instrument must be

carefully wrapped and cushioned with appropriate packing material before it is shipped. If the

original material is unavailable, obtain a heavy-duty cardboard or wood shipping box and firmly

pack the instrument on all sides with at least 2" of Styrofoam or equivalent packing material.

Before returning the instrument for maintenance or recalibration, contact the factory for further

shipping instructions.

PRECAUTIONS

PROTECT THE INTEGRATED CIRCUITS. A person walking across a carpet on a dry day can

generate a static charge of over 10,000 volts. The resulting discharge can destroy an

integrated circuit. Therefore, use standard anti-static equipment any time the QSP-170BD is

opened and the components are removed.

MAINTAIN PROPER CALIBRATION. The proper conversion of the voltages for each sensor to

engineering units is determined by data contained on the calibration certificate issued with each

instrument, and updated on subsequent recalibrations. The calibration factors for your sensors

have been set in the QSP-170BD. It is the ultimately your responsibility to see that the

calibration factors are reset whenever an instrument is recalibrated. Annual recalibration of

your entire system is recommended.

CARRY SPARE BATTERIES. For extended operations, it is prudent to carry a spare battery.

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BIOSPHERICAL INSTRUMENTS INC.1

1.0 INTRODUCTION

The Biospherical Instruments QSP-170BD Two Channel Digital Readout System acts as a

digital display and power supply for the following BSI instrument models: QSR-240, QSP-200,

MRP-200, MCP-200, QSL-100/101 and QSP-200D. Up to two instruments may be attached to

the QSP-170BD at one time. One must be a surface (reference) sensor, and the other must be

an underwater sensor. The signals from attached sensors are available for monitoring on the

digital display, which uses a liquid crystal 3½ digit display (maximum reading 1999) to provide

visual readout output of the sensors during operation. Data are also available as analog signals

at recorder outputs for processing with a computer-controlled data acquisition system.

This manual describes operation and installation procedures for the QSP-170BD. It should be

read carefully in conjunction with the attached sensor manuals, as there are several

precautions that should be taken to ensure the accurate performance of your instrument

system.

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BIOSPHERICAL INSTRUMENTS INC.2

2.0 SPECIFICATIONS

CALIBRATION: The QSP-170BD is set according to the current calibration factors for your

instruments. The QSP-170BD should be reset whenever the instruments are recalibrated.

Annual recalibration is recommended.

POWER REQUIREMENTS: Two "D" type batteries, located in the right front of the QSP-

170BD, supply power to the QSR-240, QSP-200D, and QSP-170BD readout. External power

may be supplied by a 12-18 volt DC power source at approximately 100 mA.

BATTERY LIFE: Refer to Section 3.3 - Battery Selection for the life expectancy of various

types of batteries at various temperatures.

DISPLAY: 7 digit LED readout and simultaneous recorder output for all channels.

OUTPUT:

•Signals: Sensor (underwater sensor), Reference (surface sensor), and Depth

(from QSP-200D).

•Scale Factors: For Sensor and Reference, typical calibrated output is 1

Volt = 1017quanta/(cm2/sec). For Depth, 10 mV = 1 meter.

•Impedance: 1 kOhm.

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BIOSPHERICAL INSTRUMENTS INC.3

3.0 OPERATING INSTRUCTIONS

3.1 OPERATING THE QSP-170BD

The QSP-170BD controls the functions and data collection of all attached instruments. The

following are instructions on the digital display’s functions, inputs, outputs and connection ports.

3.1.A. Switch Functions

1. POWER: This switch has three positions: OFF, ON, and TEST. TEST is for testing

the battery under normal load. During a test, the displayed reading should be

greater than 210 (on any range). For normal operation the power switch should be

in the ON position. Nominal warm-up time for the system is two minutes.

2. DISPLAY: This switch has three positions: REFERENCE, REMOTE and DEPTH.

REFERENCE displays the output of the surface sensor, which must be plugged into

the REF jack at the rear of the instrument. REMOTE displays the output of the

underwater sensor, which must be plugged into the REM jack. The sensors must be

connected to the proper inputs or their calibration will be void. The DEPTH position

of the switch displays the output (in meters) of the depth transducer on the QSP-

200D underwater sensor.

NOTE: The recorder (data acquisition) outputs at the rear of the QSP-170BD

digital display are not affected by either the position of the DISPLAY or LIGHT

RANGE switches.

3. LIGHT RANGE: This switch determines the gain of the amplifier that drives the

digital display when the display switch is on either the Reference or Remote setting.

The RANGE switch DOES NOT affect the DEPTH readings. The depth circuit has

a fixed resolution of 0.1 meters. The decimal point in the display will shift to indicate

the correct units for each range.

4. DISPLAY: The display directly reads out in quanta/(cm2/sec) for both attached light

sensors. A flashing display or display with missing digits indicates an overload

condition and the range switch must be adjusted accordingly. Depth readout is in

meters.

5. TIME CONSTANT: In cases where there are transient light changes in the

environment and an average reading is desired, set the Time Constant Switch to the

LONG position. The light reading will then have an RC time constant of 6 sec.

Normally, in the short mode, RC=300 msec.

6. NULL CONTROLS: Small zero offsets may be corrected by adjusting the front

panel "trimpots" (null controls), which are accessible by a small screwdriver. Cover

the Teflon collectors and take a dark (zero) reading. Adjust the null controls

accordingly. If it is impossible to "zero" the sensors then the sensors should be

returned to Biospherical Instruments for recalibration.

3.1.B. Rear Panel Inputs/Outputs

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BIOSPHERICAL INSTRUMENTS INC.4

1. REF JACK: This is for connection of a reference (QSR-240) sensor or laboratory

sensor (QSL-100P). If such a sensor is purchased subsequent to purchase of the

170 display unit, the QSP-170BD must be returned to the factory for recalibration to

match the new sensor.

2. REM JACK: This is for connection of an underwater scalar irradiance sensor.

3. POWER: This is for using an external power supply with the 170BD and its sensors.

Nominal power requirement 12 to 18 volts DC at 100 mA (center contact +, outer at

ground). It is recommended that any external power supply be "floated" when using

the underwater sensor to avoid ground loops due to the instrument housing being

connected to instrument ground (on recent models, after 1992, the case is AC

grounded through a 1uF capacitor).

4. REM OUTPUT "BNC"-TYPE RECORDER OUTPUT: The calibrated (1

volt=1017quanta/(cm2/sec)) output comes from the sensor plugged into the REM

jack. It is not affected by the settings on the display or range switches. The voltage

is output through a nominal 5 kohm current-limiting resistor and may be used to

drive a high impedance data acquisition system or analog recorder.

NOTE: It is recommended that any external device connected to this output

have a "floating" ground to prevent ground loops when used with an

underwater sensor since the housing of the QSP-200D sensor and the shield

on the underwater cable are connected to the instrument "ground". Adapter

cables are available from many sources to connect the BNC jacks to other

types of cables.

5. REF OUTPUT "BNC" TYPE RECORDER OUTPUT: This calibrated output (1

volt=1017quanta/(cm2/sec)) is from the sensor plugged into the REF jack. It is not

affected by the settings of the display or range switches. It also is connected

through a 5 Kohm resistor for external recording.

6. "DEPTH": This is the depth signal output from the pressure transducer internal to

the QSP-200D sensor. The scale factor is 10mV/meter. The output is buffered by a

5 Kohm resistor. This output is not affected by the settings on either the range or

function switches.

3.2 MAINTENANCE

The QSP-170BD requires no user maintenance, other than battery replacement. However, it

must be reset whenever attached instruments are recalibrated.

3.3 BATTERY SELECTION

The QSP-170BD uses two readily available "D" cells. Various types of batteries are available

but each has different cost, life and temperature qualities. Below is a summary of commonly

available types of batteries and their respective properties.

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BIOSPHERICAL INSTRUMENTS INC.5

•ALKALINE-MANGANESE DIOXIDE: The preferred type to use, but also fairly expensive.

Excellent shelf life (typically, 80% of original capacity after four years on the shelf). This

type of battery features a high energy density, gradual discharge over most of the useful

life, very good low temperature operation, and good leakage characteristics.

•MERCURIC OXIDE: The best battery to use under all conditions except low temperatures.

High cost makes alkaline batteries generally preferable.

•NICKEL-CADMIUM: Very good low temperature characteristics but only 30 to 50% the

capacity of alkaline batteries. Air charge retention after charging but should be used within

several days of charging. Ideal for use when the instrument is used for short periods (8

hours), with full charge cycle between uses. Several makes of chargers readily available.

NOTE: The optional BAT-170, Battery Eliminator, will not charge Ni-Cd batteries.

•"HEAVY-DUTY" CARBON-ZINC (Zinc-chloride): Almost the same lifetime as the alkaline at

moderate temperatures but less expensive. Slightly subject to leakage. Not recommended

for low temperature operation.

•CARBON-ZINC: Least expensive. Approximately half the capacity of the "heavy-duty" type.

Subject to leakage. Do not leave any batteries in instrument for storage. Poor temperature

operation. Recommended only for above 10°C operation, periods shorter than 8 hours.

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